The TBO-9 combines Clean Boost and Overdrive capabilities with a tube gain stage to create a versatile tone-shaping tool.
The ideal complement to non-master volume tube amps, the TBO allows you to drive a clean or semi-clean amp to the breaking point, giving it that “on 10” tonality at a much lower volume level and without altering the amp’s signature tone.
The TBO-9’s tube stage is controlled by the Boost knob which adds a fat, warm bottom end with a slight mid bump as it increases the output level.
The Drive knob blends clean and distorted signals, allowing the user to dial in a small amount of grit with minimal coloration.

Review by Music Players

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Review by The Gear Page

Manual

Demo by Mike Hermans

Demo by GodlykeInc

TBO-9 True Tube Booster/Overdrive

ROD880 Real OverdriveA built-in real tube to produce its overdrive tone. It adds lots of sustain and is very responsive to pick attack.Equipped with a switch for noise reduction to cut off unwanted noise.Reliable footswitch and easily viewable LED for trouble-free performance.

Review by audiofanzine

Demo by  やふおくさん

Demo by Kyrylo Barakhtianskyi

Review by topguitars

ROD881

In 1994, one Bill Finnegan (and two engineers from MIT) sat down and created the Klon Centaur, one of the most talked-about circuits of all time. While it was at its core an overdrive circuit, it boasted several innovations that put it ahead of the rest of the stuff out there. For one, it included a robust power supply that provided a theoretical 27 volts of headroom from a nine-volt supply. Perhaps more notably, the Centaur thrust the idea of dual-gang potentiometers into the groupthink of pedal development. While these weren’t cutting-edge tech in 1994, very few pedals utilized them. In fact, the Shin-Ei Uni-Vibe is one of the only popular pedals I can remember using one (C100K in fact).

Review by musicradar 

Review by Catalinbread 

Demo by Guitar Bonedo 

Demo by Reverb 

Demo by intheblues

Review by Top Guitars 

OD820 Overdrive Pro

A unique concept in booster design, the DB10 features two completely independent boost circuits in a single compact housing. 

The Clean (Left) channel offers up to +20 dB of clean boost with a completely flat frequency response. 

The Vintage (Right) channel is Maxon’s take on the classic Treble Booster circuit.  It offers up to +20 dB of boost, but with a subtle high-frequency roll-off that increases as the Level is turned towards maximum.

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