|Solid State Talk all about solid state amplification.|
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
||Thread Tools||Search this Thread|
|30th December 2004, 02:42 PM||#1|
Join Date: Dec 2004
Infinity BU1 amplified subwoofer. problems.
Among all the things i already asked on this board, i have a Infinity BU1 amplified subwoofer that is also burned.
It is almost all SMT design so some transistors dont have part number on them.
Is there a schematic available somewhere?
I have done several mesurements, tested almost all the transistors and resistances in it...it plays, but with a lot of distortion and one of the output, the one that is on the b+ gets very hot.
Did try to locate the bias circuit but no results.
The preamp seems to be part of the global amp feedback. If i inject signal after the preamp stage, it plays with no distortion, but still get very hot on the b+ q and barely get 1w of output power.
I have changed 2 of the smt op amp wich are plain 4558.
Something went wrong with the psu as the po did add big caps and changed the power transformer.
Any help would be very appreciated.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Infinity HTS20 subwoofer humming noise with RCA inputs connected||pleasehelp||Subwoofers||6||22nd February 2008 11:56 PM|
|infinity modulus subwoofer wanted||The Rug Doctor||Swap Meet||1||28th August 2007 06:43 PM|
|sunfire, infinity + other subwoofer plate amps for sale $50.00||NickB||Swap Meet||3||28th February 2005 11:39 PM|
|May Have Fried My Infinity Modulus Subwoofer||Agent_C||Subwoofers||1||2nd February 2005 09:35 PM|
|Replacement Driver for Infinity RS Subwoofer||Phillyguy||Subwoofers||0||2nd January 2004 02:13 AM|
|New To Site?||Need Help?|