Brax amplifier help (no output)

MCD007 · 8th January 2008, 01:32 AM

Hello all,

I was referred here a place where I could find help with my Brax amp. Since Brax is no longer sold or supported in the US I have had a tough time finding someone local or otherwise to repair the amp.

The model is the SPL competition and it powers fine (green lights all around) but there is no sound output. I ruled out the source signal to verify that in fact it is the amp that is the problem.

I would like to try my hand at repairing this if possible. Any help would be appreciated.

thanks

jol50 · 8th January 2008, 02:29 AM

Did you move the RCAs a little if possible (loose connector), use all the controls to see if they had a bad solder/etc.? Lift the cover and look for anything burnt? With a digital meter what is millivolt of the speaker leads for each channel and bridged if you run the amp with nothing hooked to it, just power?

1moreamp · 8th January 2008, 02:48 AM

Sunnyvale ?? Like in Bay area ?? I live there. LMK I have worked on smaller Brax amps in the past....

By the way which model do you have???

MCD007 · 8th January 2008, 05:08 AM

jol50: It slowly began losing its output over a 3 month period. I checked for loose connections and burnt areas. But I am not sure whether the back side is burnt or just flux residue. I will try the millivolt test to see what I get.

Justonemoreamp: Yea sunnyvale in the bay area. That would be sweet if you could help me out. The model I have is the SPL Competition. Its rare compared to the X#### models.

jol50 · 8th January 2008, 05:32 AM

I had one that would lose power at times then stayed that way, some of the transistors came unsoldered in the outputs. PPI lays them right on top of the board and they came off.

1moreamp · 8th January 2008, 05:43 AM

e-mail sent...

MOER · 8th January 2008, 06:51 AM

We can repair this amplifier for you.

Email me at zedaudio@aol.com

Steve

lumanauw · 9th January 2008, 01:21 AM

Quote:

Since Brax is no longer sold or supported in the US I have had a tough time finding someone local or otherwise to repair the amp.

What happened with Brax in USA?

1moreamp · 9th January 2008, 03:28 AM

news to me also, but things change fast is car audio, so who knows....ZED will fix him up....

Clipped · 10th January 2008, 12:59 AM

autofile at carsound.com is the importer

8th January 2008, 01:32 AM	#1
MCD007 diyAudio Member Join Date: Jan 2008	Brax amplifier help (no output) Hello all, I was referred here a place where I could find help with my Brax amp. Since Brax is no longer sold or supported in the US I have had a tough time finding someone local or otherwise to repair the amp. The model is the SPL competition and it powers fine (green lights all around) but there is no sound output. I ruled out the source signal to verify that in fact it is the amp that is the problem. I would like to try my hand at repairing this if possible. Any help would be appreciated. thanks

8th January 2008, 06:51 AM	#7
MOER diyAudio Member Join Date: Aug 2003 Location: SIMI VALLEY CA	Brax We can repair this amplifier for you. Email me at zedaudio@aol.com Steve

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8th January 2008, 02:29 AM	#2
jol50 diyAudio Member Join Date: Nov 2007	Did you move the RCAs a little if possible (loose connector), use all the controls to see if they had a bad solder/etc.? Lift the cover and look for anything burnt? With a digital meter what is millivolt of the speaker leads for each channel and bridged if you run the amp with nothing hooked to it, just power?

8th January 2008, 02:48 AM	#3
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	Sunnyvale ?? Like in Bay area ?? I live there. LMK I have worked on smaller Brax amps in the past.... By the way which model do you have???

8th January 2008, 05:08 AM	#4
MCD007 diyAudio Member Join Date: Jan 2008	jol50: It slowly began losing its output over a 3 month period. I checked for loose connections and burnt areas. But I am not sure whether the back side is burnt or just flux residue. I will try the millivolt test to see what I get. Justonemoreamp: Yea sunnyvale in the bay area. That would be sweet if you could help me out. The model I have is the SPL Competition. Its rare compared to the X#### models.

8th January 2008, 05:32 AM	#5
jol50 diyAudio Member Join Date: Nov 2007	I had one that would lose power at times then stayed that way, some of the transistors came unsoldered in the outputs. PPI lays them right on top of the board and they came off.

8th January 2008, 05:43 AM	#6
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	e-mail sent...

9th January 2008, 03:28 AM	#9
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	news to me also, but things change fast is car audio, so who knows....ZED will fix him up....

10th January 2008, 12:59 AM	#10
Clipped diyAudio Member Join Date: Mar 2005 Location: home	autofile at carsound.com is the importer