Choice of TA3020 boards

fb · 1st December 2009, 01:11 PM

So I was looking at the AMP7 and Truepath modules from 41hz - they seem to have a very good reputation. However I've just seen connexelectronic's TA3020v3b modules (and their SMPS, speaker protection etc). The CNX stuff is much cheaper (comparing prebuilt modules), though the amp module is rated for less power.

What would you recommend? Has anyone used the CNX SMPS? Also I've noticed the CNX amp board uses the older mosfets.....

My need is 4x~300W into 8ohm, bridgeable into 2x~1000W into 8ohm. Majority of the time these will be used in my house, occasionally some PA use. My woofers are very low distortion, so quality is important to me. Woofers are rated 500WRMS, 1200W peak.

Thanks

Josephjcole · 2nd December 2009, 10:30 PM

I would interested as well in hearing if anybody had experience with both amps from 41hz and connexelectronics amps based on the 3020 chip. This is supposed to be a well regarded chip and the connexelectronics board is tempting considering the price.
Joe

cjkpkg · 3rd December 2009, 01:25 AM

I have used both 41hz versions and the CNX versions of the TA2022 amps. The 41hz board is DIY and CNX comes fully assembled.

I will be honest and tell you that I had problems with pads ripping off the 41hz board very easily when I went to resolder components. That being said, the components on the boards seem comparable. The 41hz circuit seemed a little more "complex" - not better or worse, just more complicated. I ended up scrapping the 41hz board, scavenged what I could off the board and put the CNX amp in its place.

Many of the traces on the CNX board appear to be wider and in my opinion less prone to ripping off. Maybe I got a bum board or whatever.

Many people here have had good luck with both. I guess it just depends how much board stuffing you want to do yourself and how much you want to spend.

col · 3rd December 2009, 01:56 AM

I have a ConnexElectronics TA3020-V1 amp that I built around a year ago. I'm using it with a 30-0-30v 300VA Toroidal transformer, so lower end of the power spectrum. Sounds very nice and when I bridge it to power a PA sub copes fine. Great value for money.

col.

fb · 3rd December 2009, 02:26 AM

Col, have you used it with compression drivers? I'm active amping - my current amp is a home theatre reciever and it produces a lot of noise with the high sensitivity driver (I think it's from the input stage).

col · 3rd December 2009, 02:37 AM

Quote:

Originally Posted by fb

Col, have you used it with compression drivers? I'm active amping - my current amp is a home theatre reciever and it produces a lot of noise with the high sensitivity driver (I think it's from the input stage).

Quote:

My need is 4x~300W into 8ohm, bridgeable into 2x~1000W into 8ohm. Majority of the time these will be used in my house, occasionally some PA use. My woofers are very low distortion, so quality is important to me. Woofers are rated 500WRMS, 1200W peak.

you are going to put 300W into a compression driver at home! I hope you have some very good ear defenders

I have a tri-amped system with compression drivers (104db), it is very hard to find an amp quite enough to stop hiss. I use a TA2020 or TDA8920 for this purpose. TA3020 is better on the mids or subs.

col.

fb · 3rd December 2009, 02:46 AM

Hehe, I know I'll only ever use a couple of watts with the CD at home. I just don't want to be caught short in a PA situation - I've been looking at the power ratings into 8ohm of the other amps on the 41hz site and the ta3020 seems to be the best option. I'll have a look at TDA8920

luka · 3rd December 2009, 05:49 AM

got amp7 and amp2, both great, 7 just better, has more "options" if I say so

TheShaman · 3rd December 2009, 07:57 AM

I didn't have the chance to compare the various 3020s but, regarding board quality, I can say that 41Hz Truepath has a top quality PCB.
I've done extensive modifications and parts swapping (and then some more swapping) and the board seems to hold pretty well.
The parts used in the kit are all quality stuff from known brands.

fb · 3rd December 2009, 01:02 PM

Quote:

Originally Posted by luka

got amp7 and amp2, both great, 7 just better, has more "options" if I say so

Amp7 is looking like my best option for the woofers - I'm just not quite sure what the actual output power is into 8ohm.

Col, do you think the TDA892x v2 board with TDA8950TH IC option would be a good choice for the compression drivers?

1st December 2009, 01:11 PM	#1
fb diyAudio Member Join Date: Apr 2005 Location: Brisbane, Aus	Choice of TA3020 boards So I was looking at the AMP7 and Truepath modules from 41hz - they seem to have a very good reputation. However I've just seen connexelectronic's TA3020v3b modules (and their SMPS, speaker protection etc). The CNX stuff is much cheaper (comparing prebuilt modules), though the amp module is rated for less power. What would you recommend? Has anyone used the CNX SMPS? Also I've noticed the CNX amp board uses the older mosfets..... My need is 4x~300W into 8ohm, bridgeable into 2x~1000W into 8ohm. Majority of the time these will be used in my house, occasionally some PA use. My woofers are very low distortion, so quality is important to me. Woofers are rated 500WRMS, 1200W peak. Thanks

3rd December 2009, 01:56 AM	#4
col diyAudio Member Join Date: Feb 2008 Location: Melbourne, Victoria, Australia	I have a ConnexElectronics TA3020-V1 amp that I built around a year ago. I'm using it with a 30-0-30v 300VA Toroidal transformer, so lower end of the power spectrum. Sounds very nice and when I bridge it to power a PA sub copes fine. Great value for money. col. __________________ http://www.minirig.org.au

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2nd December 2009, 10:30 PM	#2
Josephjcole diyAudio Member Join Date: Jun 2004 Location: Wisconsin	I would interested as well in hearing if anybody had experience with both amps from 41hz and connexelectronics amps based on the 3020 chip. This is supposed to be a well regarded chip and the connexelectronics board is tempting considering the price. Joe

3rd December 2009, 01:25 AM	#3
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	I have used both 41hz versions and the CNX versions of the TA2022 amps. The 41hz board is DIY and CNX comes fully assembled. I will be honest and tell you that I had problems with pads ripping off the 41hz board very easily when I went to resolder components. That being said, the components on the boards seem comparable. The 41hz circuit seemed a little more "complex" - not better or worse, just more complicated. I ended up scrapping the 41hz board, scavenged what I could off the board and put the CNX amp in its place. Many of the traces on the CNX board appear to be wider and in my opinion less prone to ripping off. Maybe I got a bum board or whatever. Many people here have had good luck with both. I guess it just depends how much board stuffing you want to do yourself and how much you want to spend.

3rd December 2009, 02:26 AM	#5
fb diyAudio Member Join Date: Apr 2005 Location: Brisbane, Aus	Col, have you used it with compression drivers? I'm active amping - my current amp is a home theatre reciever and it produces a lot of noise with the high sensitivity driver (I think it's from the input stage).

3rd December 2009, 02:46 AM	#7
fb diyAudio Member Join Date: Apr 2005 Location: Brisbane, Aus	Hehe, I know I'll only ever use a couple of watts with the CD at home. I just don't want to be caught short in a PA situation - I've been looking at the power ratings into 8ohm of the other amps on the 41hz site and the ta3020 seems to be the best option. I'll have a look at TDA8920

3rd December 2009, 05:49 AM	#8
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	got amp7 and amp2, both great, 7 just better, has more "options" if I say so

3rd December 2009, 07:57 AM	#9
TheShaman diyAudio Member Join Date: Jan 2007 Location: Crete	I didn't have the chance to compare the various 3020s but, regarding board quality, I can say that 41Hz Truepath has a top quality PCB. I've done extensive modifications and parts swapping (and then some more swapping) and the board seems to hold pretty well. The parts used in the kit are all quality stuff from known brands.