This is a perfect tutorial, I just fried my Rockford Fosgate Amp this weekend after blasting my subs for too long. I took it apart and their wasn't too much left of the heatsink compound. The 4 mosfet power transistors are defiantly fried, I'll use your skillet technique to remove them. Thanks for posting this, gives me some confidence that i can actually fix the amp.
And that's the joy of fixing it. Awesome repair. You had no idea that these RF amps are very popular, even a little 'old school' car audio starting to become more popular. You did notice the quality of the equipment at the end of the video.
I will say i have not seen any amps with "transistor blocks" before and i have been repairing amps for quite some time. Excellent work by the way. Volkman Audio Repair
Nice fix, Rockford Fosgates are good amps. I'm glad there are folks out there who choose to fix broken electronics vs just throwing it in the landfill. I'm the same way.
Beautiful amp, and great work getting her going again. In case you haven't already found out, the bolt ears on each side are for plates/wings that cover the wiring for a clean install. Would love having this amp. Again, Great Job! Can't beat old school Fosgate.
i have one here same model, same problem if u want it i can ship it to you. i have way too.many car audio as i am an installer and audiophile collector of vintage home audio as well as a electronics tech for over 21yrs. let me know. nigelmahabir@gmail.com
I went where? I wasn't being sarcastic. You called my credibility into question numerous times, but I compliment you on your obvious passion for audio and I "went there?" I think the deep breath is yours for the taking this time.
Great video! I have been into car stereo since 1990. I own 5 of these old school Rockford Fosgate Punch amps and still use them all daily in my vehicles. I also own a newer Class D Rockford. They have always been the top end! SQ is always second to none
Welcome to Maxxarcade. Today we making circuit board. Heat up the circuit board, add some solder, finish it off with a spice off flux and you got a delicious repair.
Thanks for making this video. I just bought the same type of amp and one of the Mosfets was completely destroyed. It is a punch 150@2. I also have punch 120@2 and a punch 360@II. These are awesome amps. I'm not an electrician by any means, but I think I'm going to try to replace the Mosfet myself. Thanks again.
You are correct those tabs are for mounting plastic endcaps to hide all the speaker/power connectors. Those were probably one of the last series of amps to be manufactured by Fosgate in the U.S. once Bestbuy got their little gruby hands on Fosgate it was all over.
I have one of these too that I got going today, i had to replace all transistors, but anyway it worked perfectly for several hours and then the left channel blew up while I was jamming out. And it turns out there's a really advanced problem with the driver circuit for the left channel, its not something I can repair since it requires SMD soldering which I'm unable to do. So now I have a single channel Rockford fosgate amp :) It still has enough power even with only one good channel. I tried swapping the FETs again, but it instantly blew them again. So I'm calling that amp my "singlerockfos amp". XD just thought I would share that with ya :)
those amps were really good back in the day. they would pound any sub you put on them. rockford always underrated their amps. these and older fockford amps. newer amps suck imo,well except for the high dollar amps.
I've repaired a lot of these on my own. What I use is a small butane torch works great on soldering and desoldering the MOSFETs. What you there is a easy fix. The 4 MTP50N06Vs you can replace with IRFZ44 or IRF3205, and if your using 3205 change the gate resistors to 47 ohms the originals are to high. And make sure the drivers are producing the 5 - 4 ~ volts to drive the ps fets.
You know, I was fortunate to be exposed to really fine audiophile equipment at an fairly early age and I can tell you that once you've heard that level of audio reproduction, you know when you hear it again. I just did, that amp was great.. kudos on those bench speakers too.
Those 8" Eminence drivers and Philips domes just keep impressing me! They're so clear and work so well together! I'm quite shocked by the bass also, it's quite deep considering I think they're the Beta 8 drivers. If they're Beta 8 they should go down to 80 Hz or so. Your electronic skills are superb! You're making me want to learn more and more about this stuff! I have a battered up PA amp here that I need to fix and I'm so stuck :(
nice video, i waited for a video like that for some time where you explain step by step what your doing and also a final audio test when its done, great job!
Man u are an electronic GOD. I wish i not so far from u. Have a nice 30amp power inverter. I use to install car stereos in my teens and bought many used amps so i always test them with it. I miss my multi room stereo so badly. Noone locally can or will try fix for me
Just about to do my First Transistor/FET replacement on my Punch 250a2 ( one step down from the 360 ) that ive owned since new in '99 And this video is awesome on detail. BIG HELP. Thank you. and love the skillet idea.
+Michael Gillen how did it go? I'm currently trying to repair my 250a2. it powers on put the power led just pulses ,and with no out put. Maybe you could help me?
As it's a Punch 360aII it's the Best Buy version, the ones sold by authorised RF dealers are Punch 360a2. It's only giving 45 watts to each of your speakers as they are 8 ohm. The amp is bridgeable for 360w RMS on a 4 ohm sub.
I'm really happy for you man. I had the smoke incident happen to my car stereo due to grounding short, so I know exactly how it feels when you fix something that's otherwise just scrap plastic and parts. I'll try troubleshooting that board next year (2017). Wish me luck.
Being the party that's attacked in a flame war is no joy. I understood what you said; and I do wish I had gotten an in person listen to the amp in a properly set up room with speakers optimally placed and working perfectly. It's not a perfect world. I won't say that amp is the finest I've ever heard, but I'd probably have the same opinion of it if it WERE in the perfect listening room. You perhaps have the more nuanced ear, a true audiophile. I must be content with my amateur status ; D
I have a band you might enjoy, they were the first to record directly to digital with minimal use of overdubs and the majority of their music was performed, recorded and mixed "live" to the recorder. They are an audiophiles dream. If you like new experiences they are that. With a dynamic range like nothing I have ever heard since. The name of the Band is Flim & the BB's. They are all consummate musicians. A good example of their music is Tricycle, a version of it on RUclips to give you an idea
Good work on your videos. If I may make a suggestion; the next time you need to solder something with a lot of surface area, brush on some flux first. It'll make your soldering job much easier.
Sometimes you can use slightly higher rated transistors, but they would need to have very similar characteristics and conduction curves to work properly. It depends on the preamp/driver stage design in the amp. With this one, the original parts were obsolete, so I had to use a different brand with the same ratings.
you could use that plate to heat it up to the solders melting point and you can then just pick the parts off and then clean up the pads . after that you can apply solider past to the parts for the new mosfets, and put it in and oven just a little over the solders melting point and it will melt the solder and it will not harm the mosfets. or use a het gun to do it also and with the pan you can use it as your preheater when placing the parts also both ways will work.
Those are some of the best amps ever made, pre China. 90's for that one. Typically the heat sync compound dries out over 20 years and that's what fries the fets, otherwise they rarely burn out.
No, car amps are sensitive because they always have their gain way up. The volume is normally controlled by the car stereo. In this case it was loud because I'm using an M-Audio Delta 44 sound card, which has a pretty high output signal compared to most consumer line level stuff.
Nice repair. I quit working on stuff like this 20 years ago because these amps are all junk and once they blow they really aren't worth repairing if you do electronic repair for a living but you're doing this just for your own pleasure so that I can understand. A good thing to always do before you hook speakers up is to measure both outputs for any DC voltage because with a split supply you can have good output transistors but have a faulty OP amp that is either blown or leaking a DC voltage to the final stages. If you have a scope, look for any high frequency oscillations on the output too. I've seen amps burn themselves up along with the tweeters with the silent killer oscillations outside the audio range.
It's still running Vista. Works fine for what I need it for, and the fact that it's 32 bit works to my advantage because of some of the old programs I use.
You can also convert the thermal from MESHA to regular mica insulators or Kapton. This would require the mesha boards to be removed and new insulators be used. as well as some pressure bars (hold down bar).
I checked around and didn't find anything else shorted. If there was, I probably wouldn't have bothered fixing it. Chain reaction shorts are a nightmare.
Not the cleanest listening experience with YT; YT is MOSTLY crap audio and surely multiple conversions have left their mark. But it's refreshing for me to hear something that is obviously producing quality sound. It's purely subjective, but then using FFT analysis or even A-weighted sound pressure isn't going to tell the whole story, and only the human ear can tell whether or not a passage of audio sounds right. I'm sorry if it offends you that I think that amp/speakers combo sounds great.
Yup. There's apps for cellphones with wich you can record a piece of a song through the mic, and it'll analyze it and figure out what song it is for you. They work really well! Same technology I bet.
Equipment? Where to begin: I have an Adcom GFA555 Amp and GFP 555 Pre-amp MB Quart 390 speakers Two Velodyne 100W subwoofers and a Denon CD player. I also have a custom made surround system powered by a Denon AVR 3803 (7.1 x100w) with rebuilt ElectroVoice Interphase A speakers as left and right and a Jamo (Danish firm) 100W subwoofer. Surround and center speakers are a mix of Polk Audio and Jamo with a Jamo DVD player.
its always good when you fix something, and it actually works. screw youtube. its not like your making money on the song. fosgate is a good amp, especially that model. really popular a few years ago
your the man! you brought that beast back to life. and i was in the same boat with missing screws. is there anywhere that sells the originals? i bet if there is that man would make a fourtine!
I have some old landmine rockford amps which have not been used for some time. Punch 200 Punch 100 What components require changing 100% on a service.They were purchased new by myself and have not been used in 20 years. Cheers
My equipment.. where to start! I have a Adcom amp GFA 555 (325W into 4 ohms continuous) GFP-555 Adcom pre-amp. Mb Quart 390 speakers with 2 Velodyne 100W powered subwoofers and a Denon CD player I have a custom built surround sound system powered by a Denon AVR3803 (7.1 x 100W) with rebuilt ElectroVoice Interphase A speakers for left and right and a mixture of Polk audio and Jamo (a Danish audiophile firm) speakers for the center and surrounds The Sub is a 100W Jamo unit and a Jamo dvd
Those speakers are THX certified, from Frazier cinema cabinets. They are Eminence woofers, but I'm not certain if they are Beta 8 or something custom. They are definitely some of my favorite speakers to listen to though. They work so well, despite having no crossover other than non-original tweeter capacitors. What amp are you working on? I'll be digging into a couple Crown amps this weekend that I've never seen before.
Really liked the video! Nice idea to use the skillet for something else than cooking food... Nice to see the Dell PC being used. Does it still run Vista, and what do you think about it? I'm running a Core2Quad Q6600 too, in my main rig. I'll post more info on that if you are interested :)
You can get a SMD rework station off eBay for $50 and it would have made it easier and faster. I got one just for this and use it to heat the glass on phones and tablets to replace to glass and it's a time saver, even faster then the phone hotplate I have.
Awesome Video! Sounds great too!. Hey, do you mind putting a track list of the samples you use in your videos in the description? You seem to always select songs that I want, and don't have, in my library.
I have the model 551s, I started de-soldering the mosfets on the right side where black soot had collected on the metal casing, i diode tested the 2 IRF3205 and got good readings, just over 0.5V on both of them, so im a little confused where the soot came from. There is only one transistor that i can barely see the numbers and has some melted solder on it, it is on the upper left side 2nd from the top, IRF3540 i think. the 4 IRF3205 all had melted solder on their heat sinks.
Well I have been using the amplifier but I've noticed some problems with it. It's a Phonic MAR 2, quite a cheap amp, only like 230W RMS per channel @ 4 ohms. But it was used in a nightclub for many years. When powering on everything is fine. But I've noticed if you don't let the amp warm up a little and you just crank it, it distorts, even if it's not clipping. In addition, when the amps cold and you power it off, it makes the right speakers bang, but when been on for a while it's fine?
Nice video, have got a few similar amps 100a2,55.2,150hd,45hd,800a2,600a5 some are working some not, might try this at some point. What did you use to clean the amp? came up really good.
Wow! Thank you so much for the informational video. I have the same amp and it has the same problem. Where can I get mosfets and price? Once again, thank you!
Ya, I hate when they solder the huge transistors like that. Some day I hope to get a good hot air rework station, but it would cost me several months pay.
This is a perfect tutorial, I just fried my Rockford Fosgate Amp this weekend after blasting my subs for too long. I took it apart and their wasn't too much left of the heatsink compound. The 4 mosfet power transistors are defiantly fried, I'll use your skillet technique to remove them. Thanks for posting this, gives me some confidence that i can actually fix the amp.
And that's the joy of fixing it. Awesome repair. You had no idea that these RF amps are very popular, even a little 'old school' car audio starting to become more popular. You did notice the quality of the equipment at the end of the video.
I will say i have not seen any amps with "transistor blocks" before and i have been repairing amps for quite some time. Excellent work by the way.
Volkman Audio Repair
Nice fix, Rockford Fosgates are good amps. I'm glad there are folks out there who choose to fix broken electronics vs just throwing it in the landfill. I'm the same way.
Beautiful amp, and great work getting her going again. In case you haven't already found out, the bolt ears on each side are for plates/wings that cover the wiring for a clean install. Would love having this amp. Again, Great Job! Can't beat old school Fosgate.
i have one here same model, same problem if u want it i can ship it to you. i have way too.many car audio as i am an installer and audiophile collector of vintage home audio as well as a electronics tech for over 21yrs. let me know.
nigelmahabir@gmail.com
I love those old Rockfords, real workhorses. Thank you for sharing.
I went where? I wasn't being sarcastic. You called my credibility into question numerous times, but I compliment you on your obvious passion for audio and I "went there?" I think the deep breath is yours for the taking this time.
Great video! I have been into car stereo since 1990. I own 5 of these old school Rockford Fosgate Punch amps and still use them all daily in my vehicles. I also own a newer Class D Rockford. They have always been the top end! SQ is always second to none
Welcome to Maxxarcade. Today we making circuit board. Heat up the circuit board, add some solder, finish it off with a spice off flux and you got a delicious repair.
Thanks for making this video. I just bought the same type of amp and one of the Mosfets was completely destroyed. It is a punch 150@2. I also have punch 120@2 and a punch 360@II. These are awesome amps. I'm not an electrician by any means, but I think I'm going to try to replace the Mosfet myself. Thanks again.
You should repair more car audio amps this was the best one I've seen so far
You are correct those tabs are for mounting plastic endcaps to hide all the speaker/power connectors. Those were probably one of the last series of amps to be manufactured by Fosgate in the U.S. once Bestbuy got their little gruby hands on Fosgate it was all over.
I have one of these too that I got going today, i had to replace all transistors, but anyway it worked perfectly for several hours and then the left channel blew up while I was jamming out. And it turns out there's a really advanced problem with the driver circuit for the left channel, its not something I can repair since it requires SMD soldering which I'm unable to do. So now I have a single channel Rockford fosgate amp :) It still has enough power even with only one good channel. I tried swapping the FETs again, but it instantly blew them again. So I'm calling that amp my "singlerockfos amp". XD just thought I would share that with ya :)
those amps were really good back in the day. they would pound any sub you put on them. rockford always underrated their amps. these and older fockford amps. newer amps suck imo,well except for the high dollar amps.
I've repaired a lot of these on my own. What I use is a small butane torch works great on soldering and desoldering the MOSFETs. What you there is a easy fix. The 4 MTP50N06Vs you can replace with IRFZ44 or IRF3205, and if your using 3205 change the gate resistors to 47 ohms the originals are to high. And make sure the drivers are producing the 5 - 4 ~ volts to drive the ps fets.
You know, I was fortunate to be exposed to really fine audiophile equipment at an fairly early age and I can tell you that once you've heard that level of audio reproduction, you know when you hear it again. I just did, that amp was great.. kudos on those bench speakers too.
Those 8" Eminence drivers and Philips domes just keep impressing me! They're so clear and work so well together! I'm quite shocked by the bass also, it's quite deep considering I think they're the Beta 8 drivers. If they're Beta 8 they should go down to 80 Hz or so. Your electronic skills are superb! You're making me want to learn more and more about this stuff! I have a battered up PA amp here that I need to fix and I'm so stuck :(
nice video, i waited for a video like that for some time where you explain step by step what your doing and also a final audio test when its done, great job!
Man u are an electronic GOD.
I wish i not so far from u. Have a nice 30amp power inverter. I use to install car stereos in my teens and bought many used amps so i always test them with it.
I miss my multi room stereo so badly. Noone locally can or will try fix for me
Just about to do my First Transistor/FET replacement on my Punch 250a2 ( one step down from the 360 ) that ive owned since new in '99 And this video is awesome on detail. BIG HELP. Thank you. and love the skillet idea.
+Michael Gillen how did it go? I'm currently trying to repair my 250a2. it powers on put the power led just pulses ,and with no out put. Maybe you could help me?
As it's a Punch 360aII it's the Best Buy version, the ones sold by authorised RF dealers are Punch 360a2. It's only giving 45 watts to each of your speakers as they are 8 ohm. The amp is bridgeable for 360w RMS on a 4 ohm sub.
Just got one of these. It uses the same board as, punch 360.2, 400S, 450S, 451S, punch 401S all similar boards. Good amps will power most subs
I'm really happy for you man. I had the smoke incident happen to my car stereo due to grounding short, so I know exactly how it feels when you fix something that's otherwise just scrap plastic and parts. I'll try troubleshooting that board next year (2017). Wish me luck.
Being the party that's attacked in a flame war is no joy. I understood what you said; and I do wish I had gotten an in person listen to the amp in a properly set up room with speakers optimally placed and working perfectly. It's not a perfect world. I won't say that amp is the finest I've ever heard, but I'd probably have the same opinion of it if it WERE in the perfect listening room. You perhaps have the more nuanced ear, a true audiophile. I must be content with my amateur status ; D
I have a band you might enjoy, they were the first to record directly to digital with minimal use of overdubs and the majority of their music was performed, recorded and mixed "live" to the recorder. They are an audiophiles dream. If you like new experiences they are that. With a dynamic range like nothing I have ever heard since. The name of the Band is Flim & the BB's. They are all consummate musicians. A good example of their music is Tricycle, a version of it on RUclips to give you an idea
Great Video and Awesome Music by Archie.Because of you I am now able to fix the exact amp with the same problem. Thank You and continue to post!
that sounds damn good through the camera's mic. you can even hear how deep the bass is. i like it!
Good work on your videos. If I may make a suggestion; the next time you need to solder something with a lot of surface area, brush on some flux first. It'll make your soldering job much easier.
you have a black and grind series amp. those bolt holes are for vanity covers. It cleans up the install and hides the connections.
Sometimes you can use slightly higher rated transistors, but they would need to have very similar characteristics and conduction curves to work properly. It depends on the preamp/driver stage design in the amp.
With this one, the original parts were obsolete, so I had to use a different brand with the same ratings.
Excellent repair as always man, Keep the videos coming. I love 'em
you could use that plate to heat it up to the solders melting point and you can then just pick the parts off and then clean up the pads . after that you can apply solider past to the parts for the new mosfets, and put it in and oven just a little over the solders melting point and it will melt the solder and it will not harm the mosfets. or use a het gun to do it also and with the pan you can use it as your preheater when placing the parts also both ways will work.
Great video. That feeling when you plug it in and it comes back to life is almost better than sex!
Nice to see it working. I will try to pickup the side covers for it. They are all over ebay.
The Rockford Amps are usually very good and easily will live up to their specs.
thanks for the info on the heat spreaders things the mosfets ore on. i was wondering how they came apart. i do a little work on amps too.
Nice,and the "speaker system" you have sounds pretty good,enough bass but not too much to be distorted by the camera mic.
Those are some of the best amps ever made, pre China. 90's for that one. Typically the heat sync compound dries out over 20 years and that's what fries the fets, otherwise they rarely burn out.
No, car amps are sensitive because they always have their gain way up. The volume is normally controlled by the car stereo.
In this case it was loud because I'm using an M-Audio Delta 44 sound card, which has a pretty high output signal compared to most consumer line level stuff.
Nice repair. I quit working on stuff like this 20 years ago because these amps are all junk and once they blow they really aren't worth repairing if you do electronic repair for a living but you're doing this just for your own pleasure so that I can understand. A good thing to always do before you hook speakers up is to measure both outputs for any DC voltage because with a split supply you can have good output transistors but have a faulty OP amp that is either blown or leaking a DC voltage to the final stages. If you have a scope, look for any high frequency oscillations on the output too. I've seen amps burn themselves up along with the tweeters with the silent killer oscillations outside the audio range.
I like it as a bench computer, because it's fast and quiet. The HP had louder fans, which got distracting during audio tests.
Thanks Max. Great demonstrating video tutorial and good music too.
those were Kick ass Amps, good video, keep posting.
It's still running Vista. Works fine for what I need it for, and the fact that it's 32 bit works to my advantage because of some of the old programs I use.
Was playing fallout new vegas before, and then i heard the music at 16:15, nice stuff!
I have used a similar trick with a skillet to reflow a dead Video card. Also pny music is a good way to get around flaggers.
You can also convert the thermal from MESHA to regular mica insulators or Kapton. This would require the mesha boards to be removed and new insulators be used. as well as some pressure bars (hold down bar).
HOT PLATE......GENIUS!!!!! THK U SO MUCH!!!
Nice work man!! 👌 Sounds awesome too. No school like the old school. 😎 My favorite Punch amps are the 2nd gen. Preferably the non-HD's.
Nicely done. Now I got a better idea on how to fix my T.M.A 1000.1. Take care, peace
Awesome video, I hope to see more of this amp!
Cool video 👍
I checked around and didn't find anything else shorted. If there was, I probably wouldn't have bothered fixing it. Chain reaction shorts are a nightmare.
I showed the 12 volt power supply I was using in the video. It's the big silver thing off to the left.
Not the cleanest listening experience with YT; YT is MOSTLY crap audio and surely multiple conversions have left their mark. But it's refreshing for me to hear something that is obviously producing quality sound. It's purely subjective, but then using FFT analysis or even A-weighted sound pressure isn't going to tell the whole story, and only the human ear can tell whether or not a passage of audio sounds right. I'm sorry if it offends you that I think that amp/speakers combo sounds great.
Yup. There's apps for cellphones with wich you can record a piece of a song through the mic, and it'll analyze it and figure out what song it is for you. They work really well! Same technology I bet.
Equipment? Where to begin: I have an Adcom GFA555 Amp and GFP 555 Pre-amp MB Quart 390 speakers Two Velodyne 100W subwoofers and a Denon CD player. I also have a custom made surround system powered by a Denon AVR 3803 (7.1 x100w) with rebuilt ElectroVoice Interphase A speakers as left and right and a Jamo (Danish firm) 100W subwoofer. Surround and center speakers are a mix of Polk Audio and Jamo with a Jamo DVD player.
That amp sounds awesome! Nice job.
nice video. thats why I do a lot of trash picking you never know find something like this and just and easy fix and then the resale be great.
its always good when you fix something, and it actually works. screw youtube. its not like your making money on the song. fosgate is a good amp, especially that model. really popular a few years ago
your the man! you brought that beast back to life. and i was in the same boat with missing screws. is there anywhere that sells the originals? i bet if there is that man would make a fourtine!
nice i love Rockford fosgate stuff altho there new stuff is not as good as the older stuff used to be.
I have some old landmine rockford amps which have not been used for some time.
Punch 200
Punch 100
What components require changing 100% on a service.They were purchased new by myself and have not been used in 20 years.
Cheers
My equipment.. where to start! I have a Adcom amp GFA 555 (325W into 4 ohms continuous) GFP-555 Adcom pre-amp. Mb Quart 390 speakers with 2 Velodyne 100W powered subwoofers and a Denon CD player I have a custom built surround sound system powered by a Denon AVR3803 (7.1 x 100W) with rebuilt ElectroVoice Interphase A speakers for left and right and a mixture of Polk audio and Jamo (a Danish audiophile firm) speakers for the center and surrounds The Sub is a 100W Jamo unit and a Jamo dvd
JELOUS i wish i could find an amp like this! i love these amps for there SQ
I love your repair vids!!
Those speakers are THX certified, from Frazier cinema cabinets. They are Eminence woofers, but I'm not certain if they are Beta 8 or something custom. They are definitely some of my favorite speakers to listen to though. They work so well, despite having no crossover other than non-original tweeter capacitors.
What amp are you working on? I'll be digging into a couple Crown amps this weekend that I've never seen before.
always the best videos..
RIP Jim fosgate
Very nice amp!!! Great job!!!
Ya, I thought about using the heat gun, but I don't have a regulated one. I was afraid of messing up the top side of the board with too much heat.
I might be doing a couple more in the near future, now that I have a way of soldering them.
I'm still yet to repair a flooded Alpine amp, it got water in it's PSU, popped the IRFZ44N's,, i suspect these may have popped 1 of the channels :(
Great video
Really liked the video! Nice idea to use the skillet for something else than cooking food...
Nice to see the Dell PC being used. Does it still run Vista, and what do you think about it?
I'm running a Core2Quad Q6600 too, in my main rig. I'll post more info on that if you are interested :)
Excellent save , thanks.
I do that with my phone too, with the Verizon ID app. It even picked up the background music in a noisy restaurant once.
I don't get car stuff in too often, but I'll always make videos when I do.
Good job buddy👍👍
alway's enjoy seeing your vids,cool
You can get a SMD rework station off eBay for $50 and it would have made it easier and faster. I got one just for this and use it to heat the glass on phones and tablets to replace to glass and it's a time saver, even faster then the phone hotplate I have.
I've been hoping to get one soon. I need something that can also do BGA chips.
i wish i had a litle bit more money
i would buy one for my car
this is exactly the sound i want
Would I have prefered to have heard it in person through the 'Maxx-Staxx' ? Of course I would.
Good information. Job well dome!
You do good work, I wish you would teach me that stuff.
Those are usually 12 or 15 volts DC, I think the bigger ones are 15 volts, but I would stick with 12 until you are dead sure.
Oh, the hot air stations? Those are pretty good for what they are, but I was aiming for something in the $1k range.
There's many apps like that I guess, I have one called SoundHound. Havent used it much but it seems to work well.
Awesome Video! Sounds great too!. Hey, do you mind putting a track list of the samples you use in your videos in the description? You seem to always select songs that I want, and don't have, in my library.
Ya, I wish rework stations weren't so expensive. It would take me years to save for one.
I have the model 551s, I started de-soldering the mosfets on the right side where black soot had collected on the metal casing, i diode tested the 2 IRF3205 and got good readings, just over 0.5V on both of them, so im a little confused where the soot came from. There is only one transistor that i can barely see the numbers and has some melted solder on it, it is on the upper left side 2nd from the top, IRF3540 i think. the 4 IRF3205 all had melted solder on their heat sinks.
Well I have been using the amplifier but I've noticed some problems with it. It's a Phonic MAR 2, quite a cheap amp, only like 230W RMS per channel @ 4 ohms. But it was used in a nightclub for many years. When powering on everything is fine. But I've noticed if you don't let the amp warm up a little and you just crank it, it distorts, even if it's not clipping. In addition, when the amps cold and you power it off, it makes the right speakers bang, but when been on for a while it's fine?
Well worth the effort :-)
Good work bro thats awesome
Nice video, have got a few similar amps 100a2,55.2,150hd,45hd,800a2,600a5 some are working some not, might try this at some point. What did you use to clean the amp? came up really good.
As long as you had the grill out, you could've made yourself some grilled cheese sandwiches...
Wow! Thank you so much for the informational video. I have the same amp and it has the same problem. Where can I get mosfets and price? Once again, thank you!
Of course its a little filtered, of course it is. But you mean to tell me YOU can't hear how well the speakers/amp performed?
Dude what camera do you have? I really like the sound quality of it.
Now ya got a amp for your car.
Ya, I hate when they solder the huge transistors like that. Some day I hope to get a good hot air rework station, but it would cost me several months pay.