The controls are as follows:
Boost: Controls the overall volume of the unit.
Gain: Controls the overall gain of the unit.
Tone: Controls what section of the Overall EQ is being boosted. At full clockwise, only the higher end of the EQ spectrum is being boosted, effectively acting as the more traditional treble booster. As you turn counter-clockwise, the band of boosted is widened, providing a full range Boost. This is extremely useful for smoothing out booming guitars or a balancing out differences in tones if using multiple guitars or gain pedals.
This pedal is best used in a couple applications. One use is to tighten up your tone in front of a gain pedal. This allows you to get very tight distortion tones. Another use is in front of a amp to add some overdrive or break up into a somewhat clean amp. Although these would be the more common uses, it can also be used after a gain pedal as a Solo boost.
Like all PLX FX pedals, this pedal is a true bypass, so there is no coloration to your sound when it’s turned off. It utilizes a standard 9v 2.1mm power adapter and NO battery snap.
Martin Roche –
I play through Orange amps and have used a OCD pedal to give it the Boost they need for the heavy music I play. Then I heard some of PLX the pedals at a show we played and was impressed at the tones. So then I got the chance to play the Bion boost and I was blown away! I have not used my OCD since that day. The Bion boost is way more musical sounding to me and gives my amps what they needs to really rip.
Sean –
Incredible boost, I threw it in front of my Revv 7-40 and it made that thing SCREAM!
Scott Steinmetz –
I was fortunate enough to be part of a group on a forum that PlxFx did a run of Bions for.
We are all players, and run the gamut from P&W to downtuned brutal metal to sludge and doom. Amps on that forum range from vintage Tweeds and Bandmasters to Fryettes and Rectos, and we ALL leave our Bions on all the time. It’s an always on pedal.
This thing is incredible for the range you can get out of it, from almost fuzz tones to the tightest modern metal tones you’ve ever heard.
It really brings out the best in your amp.
Try one, you’ll believe.
Eric MacEwen –
Truly a fantastic pedal. This pedal will take your amp into nuclear meltdown. I had first run this pedal in front of the normal channel of a Vox AC30H2. A cranked AC30 can get gainy, but it’s thick and the lows are boomy. This pedal shelves the lows, brings out a more aggressive attack and is able to bring fluidity to your distorted and overdriven tones when set as a classic treble booster. The range knob gives an amazing sweep allowing you to set where you want your boost to occur. This is fantastic as more modern amps already shelve a bit of lows as they become more gained out and this function makes the pedal more versatile.
One thing I noticed is that even in some of the highest gain settings, as much as your amp may feel like it’s nearing meltdown, it still sounds incredibly musical. It’s a must have pedal. Paul’s construction and build quality are as high quality as the tones this generates. Gives your sound that extra push you never knew you needed. And once you have it, you’ll never give it up.
Steve Grimes –
Paul made a special series of these pedals for a bunch of us on an online forum – Guitar Gear Forum – a few years back, and this is *absolutely* my favorite boost. This simple pedal is extremely versatile for matching various guitars (some dark, some bright, some in-between) to an amp, by “cutting the flub” using the tone control. It’s also key to getting my favorite hard rock / early metal tones (think Sabbath, Priest, UFO), as well as helping shape overly whooly fuzz pedals. I’ve tried a number of similar circuits, and found many of them to be nasally and inconsistent with different guitar/pickup combinations – the Bion’s tone control balances things quickly and musically.