TBP-Zero is the world's first complete DC transistor amplifier with no emitter resistors, made possible by our revolutionary circuit technology.
exceptionally high in transparency, low in colouration
TBP-Zero has achieved a truly natural sound.
Product Features

Eradication of sound deterioration factors
No emitter resistors
Revolutionary circuit technology that guarantees stable operation without any emitter resistors
Specially developed duplex temperature compensation
Meticulously tested and matched transistors

No mechanical contacts: no relays, no line fuses, nor any other mechanical contacts
Protection circuit designed to prevent shock noise and protect other connected equipments against accidental damage
Innovative first-stage and drive circuits
Fully balanced amplifier with maximum stability

Newly developed differential DC servo circuit
Non-servo complete DC amplifier using carefully selected components and materials No group delay from DC to 100kHz

Large-capacity power circuit
Newly developed flat coil EI core transformer with low magnetic flux density

Ideal chassis design and component composition

Painstaking arrangement of components and wiring for the elimination of unwanted vibration


Rated output power: 350w/8Ω; 700w/4Ω; 1400w/2Ω
Frequency response: DC to 100kHz (± 0.2dB at 1W)
Circuitry: Fully balanced (BTL)
Power transistor: Bipolar transistor
Cooling system: Natural air radiation
Input terminal: Cannon 3P connector
Input impedance: 3.6kΩ (balanced); 1.8kΩ (unbalanced) Input sensitivity: 1.76Vrms
Gain: 29.8dB
Damping factor: 1700 Approx.
Distortion: 0.02% max./8Ω at rated power from 20Hz to 20kHz
Protection circuit: DC detector; overload detector
Additional functions: Stand-by mode; circuit breaker for AC line guard

  General Information

Colour: Silver or Japanese lacquered black (special order)
Body: Aluminum
Power requirement: AC100/117V 50/60Hz
Size: 346 x 250 x 600mm (13.62 x 9.84 x 23.62inches)
Weight: 75kg approx. (165lbs approx.) x 2
Handcrafted in Japan only with specially selected Japan-made parts

  Information correct as of January 2010. All specifications are subject to change without notice

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Technical Brain Ltd.
215-2 Kasahata Kawagoe-shi Saitama 350-1175, Japan
Phone: +81 (0)49 234 1109
Fax: +81 (0)49 234 1167
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