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
 

Yes, I would agree that the HCA 1000 would have better current capability than the Crown.  Looks like it has 48,000 uf total capacitance (24,000uf per channel).  Not a huge amount, but the amp is only 100w/8ohm.

http://cd8ba0b44a15c10065fd-24461f391e20b7336331d5789078af53.r23.cf1.rackcdn.com/polkaudio.vanillaforums.com/editor/vg/enhutqtd31pz.jpg

Crown XLS:

http://s290.photobucket.com/user/iso_da_baric/media/IMG_3047.jpg.html

Keep us posted how things work out!

atmasphere's avatar
atmasphere
11,874 posts
 
The XO is a Pioneer SF 700. I will use it only as a low pass at approx 200hz. This is to compare with the mindsp re input impedance and output voltage. I am using a cap on the input of the Modwright as a hi pass.
Just as an experiment, what happens if you bypass the crossover and drive the preamp straight into the power amp driving the subs? The question is, how is the bass then?
jimbones OP
259 posts
 
Ill check that later today. I am getting improvement in the system as I work on it. However I would say the bass is not there yet. Ill drive the crown directly from the pre. I would think there would be a sonic difference and will report back. Thanks.

jimbones OP
259 posts
 
almarg, Dan agreed with you. he said 20K is good input impedance 30K is ideal. He is very helpful, one of the nicest guys to deal with. Love his product and his attitude, good karma for sure. I purchased (on his suggestion) 2 output coupling caps to help solve the problem. Your suggestions and help are greatly appreciated. Thanks all was I work through this. I am confident it will be solved in time and with money Lol
jimbones OP
259 posts
 
I bypassed the mindsp and went straight to the crown on the woofer and KWA100SE on the mid/twt. It did sound better. Not wonderful, but better. Next is to try the active XO with a higher input impedance (once I can get it). New amp should be here Thursday.  
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