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Adcom 5503 not producing Bass

Hey,

Having trouble with Adcom GFA 5503 I purchased off eBay. The amp it not producing any low frequencies. The sound is brittle and very hot sounding. When I switch back to an Adcom GFA 5400 (that I also own), the sound is rich and full. I'm driving a pair of Klipsch RF-3 II speakers. Also, when I hook up the 5503, there is a light hum coming through the speakers. The hum is not present when I hook up the 5400. So, did I get ripped off buying from eBay? I'm thinking about taking the amp to a local repair shop to see if they can help me. Any ideas? What would be causing the amp to not produce any bass/low frequencies?

Thanks so much to anyone taking the time to read this and respond.
schuman
roxy54's avatar
roxy54
7,974 posts
 
It sounds like you bought an amp in need of repair. As a side note, I would say that if you think that the 5503 sounds "rich and full", you should try a better amp. You are in for a pleasant surprise.
tpreaves's avatar
tpreaves
2,686 posts
 
E-Bay didn't sell you the amp.
schuman OP
1 posts
 

Roxy54,
I didn't say the 5503 sounded "rich and full", for if it did, I would not have written a post asking about why it sounded brittle. Staying on point, I agree the amp is in need of repair, but I'm wondering what it'll take to get this thing back to proper working condition. What is causing the amp to sound this way and what can be done to fix it? Lastly, I would be curious to hear you recommendations of alternate/better sounding amps in this price range. For what I paid for the 5503 ($500), what else is in that price range that would bring me a "pleasant surprise"? I'm looking for a warm sounding amp to match with my Klipsch speakers.

Thanks!
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