adcom

gentlejax2 · Post by **gentlejax2** » Sat Oct 02, 2010 4:12 pm

anyone here still run them? I am about to try one.

oldschoolfan · Post by **oldschoolfan** » Sat Oct 02, 2010 4:15 pm

Car amps or home audio?

gentlejax2 · Post by **gentlejax2** » Sat Oct 02, 2010 4:57 pm

ha ha ...car amps...this is the car audio section..ha ha

wheelieking71 · Post by **wheelieking71** » Sat Oct 02, 2010 8:21 pm

i use them JAX! LOL

gentlejax2 · Post by **gentlejax2** » Sun Oct 03, 2010 4:20 am

I would too...if the postal system werent full of f-ups..I would be right now

oldschoolfan · Post by **oldschoolfan** » Mon Oct 04, 2010 8:52 pm

gentlejax2 wrote:ha ha ...car amps...this is the car audio section..ha ha

Yes of course it is, I asked just because the car stuff seamed like it was really rare. Would love to see what you are doing with it.

gentlejax2 · Post by **gentlejax2** » Tue Oct 05, 2010 3:32 am

I am running highs with it and I am loving it ....very pleased

Tiger · Post by **Tiger** » Tue Oct 05, 2010 4:28 am

Got pics?

weng · Post by **weng** » Tue Oct 05, 2010 10:25 pm

I have a few of those and loved how they sound. The 4402 is just slightly shorter than MS1000TA. One of those old school amps they'd never make now

But I have no luck finding the 4702. The guts of 4702 looks gorgeous. Those 4702 are as rare as FAS ?

gentlejax2 · Post by **gentlejax2** » Wed Oct 06, 2010 3:50 am

they are all fairly rare seems like. they is maybe less than 4 on ebay at any time if lucky.

I am really liking the amp. it has had all caps replaced and been tuned to correct settings from factory. these amps have to be tuned internally to sound 100% .

it reminds me a lot of my old ZPA amps I loved.

4702 is a monster for sure.

http://ampguts.com/gallery/showgallery.php?cat=107

weng · Post by **weng** » Wed Oct 06, 2010 5:05 am

gentlejax2,
Funny, the adcom seems to sound best when the gain is max out. Very well designed and built amp just like the old school PGs. No noise even with high gain set

Drooling on the 4702....

Separate chassis for power supply and amp sections

gentlejax2 · Post by **gentlejax2** » Thu Oct 07, 2010 3:27 am

I was told it takes 16 volts to make the amp clip...and it says to max the gains when bridging the amp which I am...like it a lot though

Post by **stipud** » Thu Oct 07, 2010 7:41 am

You should never max the gains as a rule of thumb. Measure your gains with a multimeter or oscilloscope and see where you REALLY have them set!

http://phoenixphorum.com/gain-setting-w ... vt280.html

gentlejax2 · Post by **gentlejax2** » Thu Oct 07, 2010 9:13 am

stipud wrote:You should never max the gains as a rule of thumb. Measure your gains with a multimeter or oscilloscope and see where you REALLY have them set!

http://phoenixphorum.com/gain-setting-w ... vt280.html

Ordinarlily I would say your right...

but in the case of the ADCOM it says right in the manual that if your bridging the amp(like I am) then to crank the gains to max ..it says full max not higher than normal...full

if I have time I will find it and link it for you myself...

otherwise I would say that your response was right on...and what i would normally do.

seriously ...did you think I didnt know how to set the gains or did you think I was a newb??

Post by **stipud** » Thu Oct 07, 2010 9:22 am

I don't care what the manual says, measure the output noob (JK)

Seriously, the output voltage is going to depend on the input voltage. If you max the gains the power will still differ based on how much voltage you put into the amp.

Keep in mind those Adcom car amps were made before high voltage RCAs became common in car audio. Back in their day 2 volts RMS was about as high as you would see... nowadays 4-8 volts is very common. You could do some serious damage like that!

gentlejax2 · Post by **gentlejax2** » Thu Oct 07, 2010 9:27 am

stipud wrote:I don't care what the manual says, measure the output noob (JK)

Seriously, the output voltage is going to depend on the input voltage. If you max the gains the power will still differ based on how much voltage you put into the amp.

Keep in mind those Adcom car amps were made before high voltage RCAs became common in car audio. Back in their day 2 volts RMS was about as high as you would see... nowadays 4-8 volts is very common. You could do some serious damage like that!

I will research it some more and ask some people who know more about it than me...

I may turn them down a little since you insist...

davidtemple · Post by **davidtemple** » Mon Oct 11, 2010 6:50 pm

Mike?

You enjoying the ADCOM? Hell of a amp. Please keep this one

itchnertamatoa · Post by **itchnertamatoa** » Mon Oct 11, 2010 8:58 pm

Mike can't for the life of god keep an amp for more then 3 weeks ...
J/K Mike, nice to see you around here

gentlejax2 · Post by **gentlejax2** » Tue Oct 12, 2010 3:54 am

no worry...I am keeping the adcom...absolutely no reason to sell ..unless I find a bigger one .

gentlejax2 · Post by **gentlejax2** » Fri Oct 22, 2010 9:44 am

just thought i would update...adcom died...not sure why...since I am not a amp tech I have decided not to spend even more on it or it would end up being the most expensive 4304 ever....

but it sure as hell sounded nice...I loved it and it had all the power one could need.

the line drivers for these amps put out 16volts .....I mention that cause the question about the gains being so high and the amps not being able to handle it ...

now on ebay

Post by **kg1961** » Fri Oct 22, 2010 9:47 am

itchnertamatoa wrote:Mike can't for the life of god keep an amp for more then 3 weeks ...
J/K Mike, nice to see you around here

another mike with the same problem as me

Post by **kg1961** » Fri Oct 22, 2010 9:47 am

so is the amp damaged? just poped a fuse? I only see one on ebay right now with the oem box just looked quickly didn't get the model number

twisted · Post by **twisted** » Fri Oct 22, 2010 11:58 am

gentlejax2 wrote:just thought i would update...adcom died...not sure why...since I am not a amp tech I have decided not to spend even more on it or it would end up being the most expensive 4304 ever....

but it sure as hell sounded nice...I loved it and it had all the power one could need.

the line drivers for these amps put out 16volts .....I mention that cause the question about the gains being so high and the amps not being able to handle it ...

now on ebay

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