Hifonics Brutus BXi 2608D - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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
Reply
 
Thread Tools Search this Thread
Old 10th June 2011, 04:31 AM   #1
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Default Hifonics Brutus BXi 2608D

Ive got this amp in for repair which I'm very close to fixing. It came in with about $50 worth of damaged parts, from a dozen IRFP064N ps fets and drivers to another dozen IRF640/9640 outputs.

Taking what I learned about a weak driver circuit from a Crunch ground pounder here: Crunch Ground Pounder GP1500D, I modified the PS drive circuit for use with BD139/BD140 drivers, and bridged the 500 ohm R60 and R60A. In the previous Crunch amp with similar power supply doing this increased the drive circuit of the PS. I also used 47ohm gate resistors on the IRFP064N fets (down from 100 ohms). This slight modification appears to be working just fine for now... except...

The amp powers and idles just fine (does not heat up), and will probably play audio as it has +-80 dc rail voltage. I am however affraid to keep it powered for very long because the output of the ps is running unregulated at the moment.

I temporarilly removed the R60/R60A jumper so the circuit is now back with 500ohm and the PS still operates unregulated
  Reply With Quote
Old 10th June 2011, 04:48 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you know for a fact that it has a regulated power supply?

What are the rail caps rated for?

What is the DC voltage at the B+ and ground terminals?
  Reply With Quote
Old 10th June 2011, 05:05 AM   #3
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Well I'm not 100% sure, but this amp is one of the largest MaxxSonics amps I've had on my bench in awhile. Its got 12 power fets and 20 IRF640/9640 outputs so its pretty large I'd say. This one in particular also says "25th aniversary 2600 Watts Super D_Class Mono" on the case. I think I remember the crunch amp being regulated.

Rail caps are 100V 3300uF

I'm using a 10A power supply for rebuilding this amp, which natually measures 13.75v with nothing connected. Powering this amp is not a problem, and the voltage only drops to 13.6 across B+ and Ground.
  Reply With Quote
Old 10th June 2011, 05:08 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Well.. Maybe it's regulated but only to protect the rail caps or the outputs (both of which can take ±100v). If that's the case, there would be no reduction of pulse width at ±80v.
  Reply With Quote
Old 14th June 2011, 03:44 PM   #5
diyAudio Member
 
Join Date: Jun 2011
Dr Zeus that amp is similar to the one I am working on now. What went wrong with it just the power supply? Is it in working condition now?
  Reply With Quote
Old 15th June 2011, 03:25 AM   #6
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
yes i fixed it the other day. it needed a whole new power supply from drivers, gates, and fets also about half the outputs. what happened to yours¿
  Reply With Quote
Old 16th June 2011, 03:34 AM   #7
diyAudio Member
 
Join Date: Jun 2011
My output is just fine and so are the rectifiers and caps. The only thing that failed for the second time is the fets and drivers in the power supply. The reason it failed the first time I was running an Orion HCCA 15.2 wired at 1 ohm and the battery under my hood failed. The voltage fell drastically and the amp drew too much current and the power supply fets went out. Stupid me for not having an inline fuse. I do now
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
HIFONICS bxi 1606d timwebb Car Audio 42 1st April 2014 02:34 AM
Hifonics Brutus BXI 2008D mike49504 Car Audio 13 17th February 2012 04:21 AM
brutus bxi 1200w timwebb Car Audio 8 15th May 2011 12:43 AM
2600 bxi brutus timwebb Car Audio 40 1st January 2011 07:32 PM
Hifonics Brutus BXi 1606d parts Bertje Car Audio 2 3rd June 2010 03:33 PM


New To Site? Need Help?

All times are GMT. The time now is 12:28 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2