Possible P3A?

kinser · 3rd September 2006, 02:22 PM

Hey all,
So now that i have my Kicker Subwoofer done i need to build a case for the amp & filter, problem is i have 2 parallel OPA541 amps, and i feel like it is not enough, the sub needs at least 150 watts in a sealed box, the OPA is doing maybe 100 watts, and if im lucky 120 watts. so i was thinking of something like this:

2 Bridged P3A amps, with 2 pairs of output transistores per amp (for running a 4 ohm driver = 2 ohm load per amp - i know its not safe BUT...) and rail voltage at +/- 30v.
the reason for that rail voltage is becuse i have 2 550VA transformers which output 22-0-22.

Possible? is it worth it?

Thanks
David

paulb · 3rd September 2006, 05:28 PM

No.
If you asked Rod whether his P3A is ok to drive a 2-ohm load, he would say no.
150 watts is an insignificant increase from 120 anyway. And though I haven't done the calcs, I don't think you can get more power from your transformers unless you parallel, not bridge.

kinser · 3rd September 2006, 06:58 PM

ok, thanks for clearing that up

Maybe ill build 2 P3a's and parallel em.. what kind of power are we looking at? if it does 60 watts into 8 ohms, and i parallel 2 amps, ill get 120 watts or so into 4 ohms, correct?
i would like to try get 200 watts or so.. as i have been told by a few members here on the forum that 120 watts is not enough to push my sub.. its a Kicker Comps C12 in a 36L sealed box.
if you read this you can see what i was told..
Kicker Comp C12 Subwoofer?

my OPA amp ran into clipping today, it ddnt sound good at all, i turnd the volume down straing away..

David Resnik

3rd September 2006, 02:22 PM	#1
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	Possible P3A? Hey all, So now that i have my Kicker Subwoofer done i need to build a case for the amp & filter, problem is i have 2 parallel OPA541 amps, and i feel like it is not enough, the sub needs at least 150 watts in a sealed box, the OPA is doing maybe 100 watts, and if im lucky 120 watts. so i was thinking of something like this: 2 Bridged P3A amps, with 2 pairs of output transistores per amp (for running a 4 ohm driver = 2 ohm load per amp - i know its not safe BUT...) and rail voltage at +/- 30v. the reason for that rail voltage is becuse i have 2 550VA transformers which output 22-0-22. Possible? is it worth it? Thanks David

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

3rd September 2006, 05:28 PM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	No. If you asked Rod whether his P3A is ok to drive a 2-ohm load, he would say no. 150 watts is an insignificant increase from 120 anyway. And though I haven't done the calcs, I don't think you can get more power from your transformers unless you parallel, not bridge.

3rd September 2006, 06:58 PM	#3
kinser diyAudio Member Join Date: Jan 2004 Location: R'aanana	ok, thanks for clearing that up Maybe ill build 2 P3a's and parallel em.. what kind of power are we looking at? if it does 60 watts into 8 ohms, and i parallel 2 amps, ill get 120 watts or so into 4 ohms, correct? i would like to try get 200 watts or so.. as i have been told by a few members here on the forum that 120 watts is not enough to push my sub.. its a Kicker Comps C12 in a 36L sealed box. if you read this you can see what i was told.. Kicker Comp C12 Subwoofer? my OPA amp ran into clipping today, it ddnt sound good at all, i turnd the volume down straing away.. David Resnik

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)