A simple little pedal that doesn't look like much, the ST81 Power Boost is a boost-type effect pedal. It bases its circuit on an OPamp and a True Coil output transformer which gives it a unique sound signature.
Externally, you have to be honest, it doesn't break any bricks! A simple aluminum box, a small sticker and roll youth! OK, but when you open it, it's something else. Quality components, custom made transformer, PCB the thickness of a floor, it's no joke! In terms of controls, Boost (Volume), Bass, Treble and voila!
Connected to a clean platform, Les Paul 59 in hand, everything at 12:00. First thing, you really have to supply it with 18V. Of course, it works at 9V, but you will gain a lot of headroom, so don't hesitate! Second thing, the ST81 stacked on an excellent clean channel type Two-Rock Studio Signature, it's a huge slap! From the first notes, we note the superb transparency of the machine, it is slightly colored, in a superb way, but it does not modify your original sound in any way. The EQ is AMAZING! It's ultra musical, you can greatly boost the entire spectrum without ever being caricatural. This is done very smoothly, as you would with a good professional EQ in the studio. Moreover, about studio, what surprises with the ST81 is the attack that it brings. It feels like playing on a very good compressor rack, or apply a slight compression as you would on a track in the studio. The dynamics are enormous, the almost unlimited headroom reserve (that of your amp) and the naturalness a model of its kind. The ST81 magnifies your sound by bringing more "everything" and allowing you to very naturally correct the frequencies you want.
In conclusion, rarely have we heard such complexity come out of a pedal, which is moreover at an affordable price. The ST81 Power Boost is a model of its kind, a turbo for your amp that will magnify its assets.
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