Help Needed Power Amp lacks punch


I just got a used supposedly high power Adcom GFA-5500. Had it run in for a few days and found that this amp has got very weak bass punch. No unusual noise or hum. Got everything but bass punch. Asked the dealer he said it's because the amp is not powered for a few months and it needs time to charge up those hugh capacitors. Asked a technician and he told me it could be a faulty capacitor or maybe also a transitor fault.
I don't know who is right and I hope that someone can give me some advise here.

I would like to know
1. how does faulty cap sounds like?
2. how does faulty transitor sounds like?
3. how long must it takes for a cap to charge up? and can that result in weak bass like lack og power?

Please help. Thanks.
rainchild

Showing 1 response by clbeanz

Don't give up that 5500!Ihave one I felt exactly the same about,warm bottom.What it did have after break in of about hundred hours was very musical top end up to point where it shifts from A to AB(To my understanding 5500 is biased class A to 25wpc).
This second sytem with a 5500 doing mids and highs and a 555II on bottom fed via 565 pre-amp.The 555II had very good low end but grainy mids and highs,the 5500 has really good top end.My one worry about how the 2 truly different designs would playback through a single set of speakers was set at ease as coherence was fine.The 5500 sounds much better in this vertical bi-amp setup My guess is it can now remain in its class A zone for most listening levels having only to power the top.Also I placed the 5500 below the 555II to act as a preheater for the cold blooded 555II.
A step up would be a better pre-amp.But most this stuff can be had for cheap saw a 565 and 555 here on agon'.