I bought a parts/repair CV-2800 on eBay years ago. One channel was supposedly bad. I took it apart and reseated all of the wires and what do ya know... easy fix!
great video!! wath do you think about the tapco j2500?? did you see that Orion of bass I love you?? with 2m views?? wath do you think? btw: you need static pressure fans
i do like your Cerwin Vega Amplifier. Dayton,Canton Speaker and your FS Audio, Treo Subwoofer and now i know what is inside your Cerwin Vega Amplifier thanks for sharing this video helps my bright day to even more brighter day :)
I am running a QSC rmx1850HD with a 12volt fan instead of 24v so much quiter you can hardley hear it. I set mine up by soldring in a 70ohm 3w resistor on the postive side of the fan cable. It has work great for me so far.
Be careful when swapping fans these are 24v! There aren't that many silent 24v fans so you need to find a way to get a 12v power source inside the amp.
Have you looked at the Citronic PLX / Pulse APB amps...? I personally own a PLX2800 and an APB2100 (“same” amp), and I think they’re a great idea - a “cheap amp”, but rather than a Skytec SPL where you have a tiny 2x 80w amp board, a relatively big toroidal transformer and a brick to add weight, they’re actually reversed engineered hardware clones of the Crest Audio CA amps! So you get a “real” amp for relatively cheap money :-)
A 12v fan being pushed by 24v will burn up, guaranteed. It's possible though that you're only feeding it like 13-15v. That'll just really quickly wear out the fan's windings/components. A full 24v will DEFINITELY burn the fan up.
SNDCX Absolutely not, some are even capable of 32 volts for a couple of minutes. If you don't believe me I can show you the proof. Most of them are pretty well built.
And i guess the smaller heatsink is for the rectifier? Because much power needs to go through? But the caps look damn small for this power. My vintage 75 W amp has a big 16.000 µF cap. That does "Just" look like twice as much but for 10 times the power? Hard to believe. Ok, my amp reaches peaks 4 times its rms.
Cheese 1337 i dont think it is oversized since it reaches peaks up to 250 watts. And if i understood my friend correctly who somehow teaches me a bit in electronics it is doing this on up to 4 channels simultaneously. It has 2 IC's and i run it with channel A+B. The Back panel sticker says up to 560 Watts power consumption. Sony STR 5800. Maybe i understood something wrong. It is a dual cap with 8.000 x2
i know power consumption also includes inefficiencys. Specially on Class A, A/B amplifiers like this. But it could go to 500 Watts effective. It does not get very warm. And it is good that it does not get very warm, so it is better for the transistors and cap which lives been shortened by heat. Like i said it has 2 STK sony custom IC`s. My guess is that each one is fed just with right or left signal an just outputs 1 channel signal on the stereo output. So it is possible to drive 4 channels without loosing power simultaneously. Other amps just reach half the power than depending on the circuitry. But anyways. I wanted to have a vintage amp because i know they are superior to modern gear most times and i got this. And i love it
That would be risky, though. It'd draw a different currect compared to just one fan, and the other control circuit of the other fan would be unloaded which could possibly form an imbalance since it's not designed to run without a left/right fan
Kinda weak looking amps to be honest. Those heatsinks are tiny dude! My 500 watt Yamaha has a 10kg transformer and has 25 output transistors. Heatsinks are 40cm x 15cm. And it’s just 500w. Those are good amps but they are entry level. Don’t want to sound like an asshole just stating the facts.
I really love the inside of the cv-2800, nice video!
I bought a parts/repair CV-2800 on eBay years ago. One channel was supposedly bad. I took it apart and reseated all of the wires and what do ya know... easy fix!
great video!! wath do you think about the tapco j2500?? did you see that Orion of bass I love you?? with 2m views?? wath do you think? btw: you need static pressure fans
Lol why the reupload? Anyway, awesome video. I love the inside of the cv-900 so complicated but it sounds amazing
i do like your Cerwin Vega Amplifier. Dayton,Canton Speaker and your FS Audio, Treo Subwoofer and now i know what is inside your Cerwin Vega Amplifier thanks for sharing this video helps my bright day to even more brighter day :)
Welcome back to anyone who saw this 20 hours ago when I accidentally set the video public! ahah
I saw the notification and I clicked on it but it was too late lol
Doublsmm you should use be quiet fans.
Doublsmm the Be Quiet silent wings 2 80 mm will be a good choise
They do like 15 db
cv-900 is the same amp used in my school theater hall. the have 4 of them to powered jbl mr series
also.. maybe use some type of rubber isolator to absorb vibration. that may also reduce noise.
Get some good old noctua fans in that bad boi
A big resistor in series with the fans should drop the voltage a bit.
Pro audio in a home ? You've got guts man.
My Rack if fitted with 4 CV2800 & 2 Crown XLI3500, the CV run and push just as well as the Crown! Is the CV underrated or the Crown Overrated?
I am running a QSC rmx1850HD with a 12volt fan instead of 24v so much quiter you can hardley hear it. I set mine up by soldring in a 70ohm 3w resistor on the postive side of the fan cable. It has work great for me so far.
24 to 12v lm7812
Is there a video on those new speaker towers? Thanks!
Use a Nanoxia fan, they are amazing fans because they are quiet as hell, and move a lot of air even at high speeds.
u should take a look inside hed 110;)
I LOVE IT
the thing under that small heatsink is full bridge diode
noctua makes very silent fans
Glen-David Koidl yup
Doublsmm, I was wondering where you buy your daytons from.
He said in another video that he buys them from partsexpress
Where else, lol
just connect two 12v fans in series
put
put put put put put put put put put put put put put put put put put put put +
step down module? why not just a 12V or 15V linear regulator?
I just order CV-1800
Be careful when swapping fans these are 24v! There aren't that many silent 24v fans so you need to find a way to get a 12v power source inside the amp.
24 to 12v lm7812
560 watts RMS maximum output power or your power transistors gonna melt...no way to produce more than that
if anyone can find where to get the CV-900 in the uk, id be really thankful
still must be much better than them cheap Skytec ones you see for sale here.
Have you looked at the Citronic PLX / Pulse APB amps...? I personally own a PLX2800 and an APB2100 (“same” amp), and I think they’re a great idea - a “cheap amp”, but rather than a Skytec SPL where you have a tiny 2x 80w amp board, a relatively big toroidal transformer and a brick to add weight, they’re actually reversed engineered hardware clones of the Crest Audio CA amps! So you get a “real” amp for relatively cheap money :-)
I'm running a 12 volt fan for almost two years on the 24 volts from the amp without problems. give it a try!
Impossible.
SNDCX It isn't, trust me. Works great.
A 12v fan being pushed by 24v will burn up, guaranteed. It's possible though that you're only feeding it like 13-15v. That'll just really quickly wear out the fan's windings/components. A full 24v will DEFINITELY burn the fan up.
SNDCX Absolutely not, some are even capable of 32 volts for a couple of minutes. If you don't believe me I can show you the proof. Most of them are pretty well built.
Where do you get the cv-2800 at???
Î think you should also compared hjow much air per minute the fan is blowing. It should be equal wirth the new one.
And i guess the smaller heatsink is for the rectifier? Because much power needs to go through?
But the caps look damn small for this power. My vintage 75 W amp has a big 16.000 µF cap. That does "Just" look like twice as much but for 10 times the power? Hard to believe.
Ok, my amp reaches peaks 4 times its rms.
Dom oversized cap lmao , nice.
Cheese 1337 i dont think it is oversized since it reaches peaks up to 250 watts. And if i understood my friend correctly who somehow teaches me a bit in electronics it is doing this on up to 4 channels simultaneously. It has 2 IC's and i run it with channel A+B. The Back panel sticker says up to 560 Watts power consumption. Sony STR 5800.
Maybe i understood something wrong. It is a dual cap with 8.000 x2
Dom power consumption ussualy doesnt do anything with output watts since efficiency, now better 8000uf caps on one polarity side :d but kinda cool
i know power consumption also includes inefficiencys. Specially on Class A, A/B amplifiers like this. But it could go to 500 Watts effective. It does not get very warm. And it is good that it does not get very warm, so it is better for the transistors and cap which lives been shortened by heat.
Like i said it has 2 STK sony custom IC`s. My guess is that each one is fed just with right or left signal an just outputs 1 channel signal on the stereo output. So it is possible to drive 4 channels without loosing power simultaneously.
Other amps just reach half the power than depending on the circuitry.
But anyways. I wanted to have a vintage amp because i know they are superior to modern gear most times and i got this. And i love it
How long do you think the fans will last after you replace them?
They should last a lifetime.
You sound sick, J.
Is this a US 110v version, or a EU version?
AU version (240v)
what are those speaker?
Dayton
Put the two 12v fans in sieries to run them at 24v
That would be risky, though. It'd draw a different currect compared to just one fan, and the other control circuit of the other fan would be unloaded which could possibly form an imbalance since it's not designed to run without a left/right fan
@@djsndcx I wired the fans in my CV-1800 in series to quiet them down and it's been fine after several years.
That amp would be 450 watt rms, no way is it 900 watt rms
Bridged at 4ohm is 900w and they make very close to that power
Let me know if you found a solution to the original fans
Nice vid But please get the jbl charge 3
noooo he got rid of t line towers! :( :(
ok thank you :)
The towers are in his bedroom hifi, he did not throw them away or sell them.
CV 900 will only give 400-450 watts into 4ohms while CV 2800 will give 500-600
watts per channel into 4ohms
can i have the 24V fan's please my post cold is LL229YZ
hey i love your videos, but can you do more these little shitty speaker blowouts. much appreciated
It is 46 pounds
Kinda weak looking amps to be honest. Those heatsinks are tiny dude! My 500 watt Yamaha has a 10kg transformer and has 25 output transistors. Heatsinks are 40cm x 15cm. And it’s just 500w. Those are good amps but they are entry level. Don’t want to sound like an asshole just stating the facts.
You're talking bullshit ... "output chips" oh yeah. Open a real amplifier, you'll find even more RIDICULOUS capacitors ... :D