Harley Benton PA-100 - Make a Cheap Attenuator Sound Better - HB PA-100 Mod

Byrdman

Shredder
Messages
1,350
I picked up a Harley Benton PA-100 a few months ago for $60 and figured what the hell. Unfortunately, it made all my amps sound like they had their balls cut off.

Searching around, I saw the suggestion over at the Marshall Forum, so I decided to try it out. This puts a 10uf Cap (Non-Polarized 100v) with a switch between the middle L-Pad solder tab and whatever Ohm output from your amp to allow the higher frequencies to pass through. I use 8 Ohm on all my cabs so here are the pics to do it that way. Camera phone video at the end so you can hear the difference.

Black wire from switch to middle L-Pad solder tab right under the resister
Black Wire to L-Pad.jpg


Red Switch Wire to 8 Ohm Speaker out - That yellow wire is going to the 8 Ohm speaker jack
Red Wire To 8 Ohm.jpg


10uf Non-Polarized 100v Cap Ziptied out of the way to keep from grounding on anything. (Don't worry I did clip that tail off)
Switch & Cap.jpg


Switch installed on the front of the unit
Switch.jpg


Sound Clip to hear the difference with SC20H. Sounds much better to me!

 
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