Rockford Fosgate Punch Power 50M amp dyno run old school cheater amplifier 0.25 low ohm test & guts
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- Опубликовано: 5 окт 2024
- In this video i show an old school cheater mono amp from 1996 made by rockford fosgate.
Rockford rated this amp 200 watts @ 1 ohm.
I found an old article from an italian audio magazine where they were at the RTTI and tested the Power 50m with 32 10" 4 ohm woofers.
At the End of this clip i show some internal components of this amp
Note that this is a resistive load test which is harder for the amp than with speakers which impedance is higher and not fixed.
Tested with 1 kHz burst signal.
I introduce my new dummy load, now i got 8 resistors, 4 x 1 ohm resistors 1000 watts each and another 4 resistors with 3.9 ohms 1000 watts each.
With these resistors i can perform tests with up to 8000 watts of continous power or 24.000 watts short term power.
Pics shot with the leica nocticon lens
Music by Audiokeller
If you like the background-Track you can download it here:
www.fletcher-sp...
#rockfordfosgate
#oldschool
#caraudio
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Back in the day I ran a punch 60 bridged into 1.33 ohms for almost a year before it got stolen. They were amazing for their time.
Hi! my plans are to dyno a punch 40 and punch 60 in my next videos. so stay tuned 😀
I also had a punch 60 running 4 Rockford punch 8's. It was amazing so mine also was stolen. This was circa 1997.
And you’ve got the end caps! Such good times when these workhorses were new. I had 2 each of the DSM series, 40’s, 60’s, 100’s and 3 200’s.
next time i want to test the small punch 40 👍
I ran 6 punch 15s on a 50m for years and it never missed a beat. The thing hammered. I still have it and the matching 50x2. Used to dominate the 0-100 watt class. Best amps I have ever owned period.
i also still have the 50x2 👍
What was the power rating on the 6 15s?
@@chokechange They were Punch 15s I believe they were 100w rms and 250w max. Speakers were so much more efficient and sensitive back then.
This is madness LOL. All this power from a 50w amp. Sweet!
Amazing regulation in these amps!
Good demonstration with a scope and onset of clipping.
thank you 👍😊
i was without scope. there are Fosgate diagrams to run 64 from 1 amp. we went to 0.06 ohms running about 2000 rms
Awesome! Do you have more detailed information about that ?
@@audiokeller1975 i actually relocated my "old school" manuals just today. I can tell ya to avoid old school amps refurbished that using only the active xovers in 88prs but such a fragile stereo .can i send pictures or attachments
I used to have a Punch 60 powering 2 10 inch Cerwin Vegas. It hit like crazy.
back in 95 i powered two 10 inch eminence subs with a punch 40ix mono 2 ohms. that was also crazy 👍
Old Fosgates are the shit. Newer ones don't compare. I used to run two 15's and two 8's of a Punch 45x2 back in the late 80's. Never tested the output, but it was loud as hell and the s ubs moved
The 1st, 2nd and 3rd gen Punch amps were bulletproof. I had a 2nd gen Punch 150 (non-HD) that I ran 2 ohms mono for years and never gave me a problem, other than getting hot. I sure miss that amp. 😕
back in 95 i bought a punch 40ix for mono 2 ohms. there was never a problem for around 6 years then i sold it. providing good cooling is important, depends on the place where you live.
@@audiokeller1975 I live South Florida, USA and it gets pretty hot and humid here in the summer time. I always kept it in a well ventilated area. I guess that helped it too.
you are correct. here in germany we faced no problems with mono 2 ohms. but some people installed their amps in the glovebox with high outdoor temperatures, so no chance for the semiconductors to breathe was given 🙁
but some of the smaller 4 channel punches dont like 1 ohm per channel. they dont deliver more power then.
The Rockford Fosgate punch series were beast. I have a Rockford Fosgate Punch 200 x2 trans ana ampfier. I have had it for many years now. It has never been opened for anything. They were considered cheater amps back in the day. They were Very underrated amps and you could get into a lower class competition and beat the crap out of everyone with them. Even till this day they are expensive to buy even used. Great video on showing the power that the old school Rockford Fosgate will deliver.
Thank you for your comment!!
Everything you wrote is completely true👍 Its hard to get these amps used here in germany. I was lucky 😁
@@audiokeller1975 you can find them here in the US online but they aren't cheap. I've had mine since 2007 and my brother owned it before me. I always keep my eye out for these old school amps.
Awesome amp you own. I have a 45hd from 1992, a 360.2, a punch 4004 and currently run a p1000.1bd in my truck. Always clean underated power!!!
thats a nice lineup of amp-generations. is the 1000.1bd the mono amp in light gray? i have a heatsink and endcaps of a 1000bd which makes 1000 rockford-watts mono into 2 ohms. should be a similar model like yours?
Very impressive. Excellent video.
thank you 👍😁
That amp was made to have two of them chained together to create one amp. The power supplies can be chained together
Yes, it’s the same situation like with two 250m 👍
Funny this came up right now ...set up a bench 10 min ago tested 225x2 power /200x2 trans ana /100x2 trans ana /hifonics zeus vii /lanzar brute force 600 was surpriced by the power and sound quality of 100ix2 trans ana after owning one back in 1995 😊
the trans anas are also nice amps. you can connect a punch status display to watch the amps state. this was excusive for the power series first. is your 225x2 the black one in classic style?
tell us the results 4ohm of em !! would u prefer a 200x2 transana or a old radiator 250x2?
both are great and very similar. the mainboard of the punch 500a2 has a 250x2 print on it. the are very identical. personally i prefer the ones without mehsa strips. they are easier to repair 👍
Just posted just a comment about the Rockford Fosgate punch amp. I have the same amp you have but the punch the 250x2 DSM
Beautiful amps… that’s all I have to say. Thnx.
Sickkk I just set up a test bench as well. Gotta get out my old rf and do some testing
looking forward to see them tested 👍👍
Great test video, I have one this amp, and others fosgate Punch old-school.
I don understand how it's resist low impedance so good...
I am from Brazil.....
thanks!
It will even be better with speakers connected instead of resistors. resistors are always harder for the amplifier.
Best regards from germany ! 😁👍
Great video and awesome numbers from that PUNCH POWER 50m!!! I will definitely hang on to mine knowing that it could really be brought down to .25 ohm's!!! In the past I had heard that from several people on the internet, but now after watching your video I know it can be done for sure!!! 👍👍👍 Even though I never really had the intention of selling it considering that I brought it with the matching pair of my PUNCH POWER 50x2 amp as well!!! Both amps cost me $545.00 on Ebay back in 2015!!! Would you say that's a good price for both amps considering that they are both in mint condition???
i think in the us the rocks have a much bigger value than here. sometimes you get like new condition amps for under 100 bucks in good working order. i checked ebay in the states - all offers are much higher priced than most of them here. so this is hard to answer.
@@audiokeller1975 Ok thank you!!! Yes your right they all have a real high price on eBay for them!!! $$$$
To run this amp at .25 ohms at 619 watts like it showed in your video, what kind of RMS would a pair of subwoofers have to have each subwoofer???
you would need a pair of subs with 0.5 ohm each. But you cant compare this because a woofer is not a resistor. a woofer is changing its impedance. impedance rises depending on box design and frequency. the resistor doesnt do that.
super cool review
Thank you 😁👍
I have the chrome RF power 50m I just picked up however it has a different heatsink and 4 flip chips plus a couple switches so cool seeing the same model but I'm guessing different versions. Anyone that can give me any info would be greatly appreciated.
is your amp the power 50.1 with the " darth vader style " heatsink?
if yes. its the same. you can link two power 50.1 to get more power like the power 50m.
this is configurable with the switches.
@@audiokeller1975 you were dead on yes mine is the power 50.1 with the Vader looking heatsink. I had no idea you could link them and there were the same
Micro amp with big power...great amps...
there was good stuff in the 90s 👍
Back then the punch series was dooe
what do you exactly mean with " dooe " ? 🤔
These amps were really way underated, the sucky part, they were ticking time bombs :(
indeed, did you face problems with them? especially the dsm series had problems with the silver capacitors. after mid 90s the quality of these caps was ok and they last longer.
@@audiokeller1975 They were sure strong amplifiers, i think later on caps became issues, first was Fets blowing up. And random events.
you mentioned 32 10inch subs on the 50m, do you know how they were wired and what was the final ohm load?
If I remember correct it was 0.125 Ohm, if you search you can find the article via google
What's the background soundtrack? Where can i find it?
I made it by myself, check the description of my other videos, there you will find the download-link 👍
👍👀👍
Still have a pair of 50m's and a 50x2
i also have one 50x2 with a polished heatsink 👍
@@audiokeller1975 mine still have the dark gray factory coatings with all the end caps. The warranty seals are in tact too. They all still work perfectly. Just feel kinda bad because they are just sitting on a shelf, along side a 200x2, 100ix and a 160x4, instead of bumping along like they were meant to.
i still have a 250m of that grey series. I had to readjust the idle current because it was a bit high with 6 amps. now its idling fine with 2.4 amps. over the years its possible that it drifts away. it plays fine now without getting hot 👍
Try To Help someone, .... JUSt tO WAtCH all tHe tERRORISt come OUt of tHE woodworks and AttACK
think u need serious help, dude 😨🤤