2. amps-preamps
  3. 126700-4635

Is my amp the problem?

I recently decided to bi-amp my speakers so I purchased a crown xls 1002. (225w 8 ohm). I am driving a 10 woofer. It sounds horrible. I can't seem to get it to put out much power despite its rating even when I make all the right adjustments. Its a class D amp. Is that my problem? It just doesn't seem to have any Ba**s. Lol. Advice is appreciated.
jimbones
auxinput
2,920 posts
 

Which crossover are you using? minDSP or Antimode 2.0? The Antimode is probably a much better unit then the miniDSP (as it’s 6 times as expensive, lol.), but keep in mind it is still a DSP (which means A/D -> DSP crossover -> D/A). If you like the way it sounds, I’m sure it will benefit strongly from a hefty 12V linear power supply such as this:

http://www.ebay.com/itm/121970182193?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Or many others that are available.  It's hard to say if this will be better than a Bryston crossover, but I know you're trying less expensive options first.

jimbones OP
229 posts
 
Aux,

right now I have a mindsp in the circuit. Since I am in an audio club I am fortunate to have loaner equipment available. So today someone lent me a Dahlquist LP-1. I know vintage Lol! It has a higher input impedance so I want to what the effect of that is.
On a related note,at this meeting the host was using GR Research dual 12 OB woofers with the A370PEQ amps. It sounded very good. I like OB stuff. However it is around 3K for that alone. Ultimately I would like to build a pair next summer. Hopefully I can save some money DIY.
jimbones OP
229 posts
 
Aux,

BTW  that supply looks nice. I would like to power 2-3 pieces of equipment with that. All low current draw. Do you think I would have to buy 3 or add connectors to supply multiple devices?

stringreen's avatar
stringreen
6,444 posts
 
Class D's are fine for subs, but even the best ones are pretty poor in the upper mids and highs.  Also, It is FAR better to use a good stereo amp than to biamp with dissimilar amps.  Biwireing is good, biamping is not.
auxinput
2,920 posts
 
That power supply is pretty hefty. The specs are 4.16 amp if you are doing the +12V DC model. This is fine if you are powering a several items like the miniDSP (which is very low current draw and uses basic op amps).  It's fine even for adding Antimode 2.0 into the mix.  This power supply has a lot of capacitance.  The capicators they use could be better, but the price is right for what they give you.  If you need a split power supply (i.e. +15V / -15V), then you'll need a different power supply.
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