Boss PQ-3B Bass Parametric Equalizer with Monte Allums Hi-Fi Plus Mod and Cap Upgrade EQ

The Boss PQ-3B Bass Parametric  Equalizer was a three band EQ calibrated to bass frequencies with an additional 18 dB cut/boost.

From Monte Allums:
Stock they are really great tone shaping pedals but are rather noisy. This mod reduces noise and adds clarity to an already good circuit. With this mod we replace the cheaper noisy op-amp chips with low noise higher quality chips.

Lower quality capacitors are also replaced reducing noise even more and also adding a more focused Hi-Fi tone to the circuit. Noise is substantially reduced and the signal is passed through preserving the original tone of your guitar. You'll be shocked at the improvement this mod will make on this.

Electrolytic caps in tube amps, over a period of time, start to leak, lose their tolerance and go bad. It’s just the nature of Electrolytic caps. Sometimes the leaking is actually visible. But Electrolytic caps can look okay and still be faulty. By replacing Electrolytic caps in older pedals you can actually improve the overall effect of that pedal. Honestly I was skeptical until I received an email from a client that was having issues after he modded his Boss BF-2 with one of my kits.  He said the flange effect was barely noticeable.  A couple of weeks later I received another email from the same client.  The client said he had solved the issue by replacing all the Electrolytic caps in his BF-2.  This piqued my interest so I started experimenting.

I was astonished how some of my older pedals benefited from the cap upgrade!  Noise seemed to be reduced and clarity and presence of the effect were enhanced.  I am now offering these Cap Upgrade Kits for mortal of the pedals I offer kits for.  In some cases some of these caps are already upgraded in the kits that I offer.  But I am offering kits that replace all the Electrolytic caps for those that have not purchased my kits.  They will benefit from upgrading the Electrolytic caps that I do not replace in my kits.  You’ll find that some of these same caps are already replaced in the kits I offer.  It’s a win-win all around for those that want the maximum benefit when upgrading their pedals.  But I didn’t stop there, when possible I have upgraded these Electrolytics with Metal Film and Tantalum. Not only do these caps have tighter tolerances but they will also last the life of the pedal.

I performed the mods myself, the difference in sound is night and day.  This goes from a good bedroom pedal to one you can use live and record with

Check out my other listings for more cool vintage, boutique, Monte Allums, Bass, Equalizer, and other guitar pedals! Any other pictures needed or questions please ask!