Hi all,
TBP-Zero is a made-in-Japan power amplifier designed by Technical Brain, priced $44,000+ USD!.
In their web site, it says:
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
Newly developed differential DC servo circuit
The circuit with a flat response from DC to high frequencies assures a stable operation of the non-feedback amplifier. This results in no group delay from DC to 500kHz and high coherency.
Large-capacity power circuit
Specially developed hand-wound flat-coil transformers with EI core that have very low magnetic flux density
Specifications
Maximum output power: 10Vrms
Frequency response: DC to 500kHz (-3dB)
Circuitry: Fully balanced DC with no feedback
Amplifier: FET and bipolar transistors
Input terminal: Cannon 3P connector (balanced) x4;
Input impedance: 7.2-17.2kΩ(balanced)
Output impedance: 3Ω (balanced)
Gain: 12dB approx.
Distortion: 0.02% max./ 20Hz - 20kHz at 5V rms output
Additional feature: Circuit breaker for power switch
Occasionally, I got its schematic and further performed simulation, which is successful. The TBP-Zero is a fully balanced structure. I am not sure if it is legal to put the schematic here, but I would share sch by LTspice.
Further suggestions and simulations are welcomed.
TBP-Zero is a made-in-Japan power amplifier designed by Technical Brain, priced $44,000+ USD!.
In their web site, it says:
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
Newly developed differential DC servo circuit
The circuit with a flat response from DC to high frequencies assures a stable operation of the non-feedback amplifier. This results in no group delay from DC to 500kHz and high coherency.
Large-capacity power circuit
Specially developed hand-wound flat-coil transformers with EI core that have very low magnetic flux density
Specifications
Maximum output power: 10Vrms
Frequency response: DC to 500kHz (-3dB)
Circuitry: Fully balanced DC with no feedback
Amplifier: FET and bipolar transistors
Input terminal: Cannon 3P connector (balanced) x4;
Input impedance: 7.2-17.2kΩ(balanced)
Output impedance: 3Ω (balanced)
Gain: 12dB approx.
Distortion: 0.02% max./ 20Hz - 20kHz at 5V rms output
Additional feature: Circuit breaker for power switch
Occasionally, I got its schematic and further performed simulation, which is successful. The TBP-Zero is a fully balanced structure. I am not sure if it is legal to put the schematic here, but I would share sch by LTspice.
Further suggestions and simulations are welcomed.
Attachments
Last edited:
Okay, so its a diamond buffer output stage. It isn't worth what they are asking for it though. I would also expect it to be unstable with bias current over its operating modes. That would be on idle for a while, low music and loud music.
The 0.02% THD is nothing to write home about either. The Cyrus MonoX power amplifiers are very similar but have been engineered properly. You would be further ahead just buying a pair of these than building what you see there. Or, you could attempt to build a MonoX amplifier if you can find a schematic.
The performance from a diamond buffer style output stage can be extremely good (Nakamichi 620 amplifier, Marantz 300DC amplifier ...). Those you can find schematics for. I would suggest that looking at the schematics would give you better insight into this amplifier.
-Chris
The 0.02% THD is nothing to write home about either. The Cyrus MonoX power amplifiers are very similar but have been engineered properly. You would be further ahead just buying a pair of these than building what you see there. Or, you could attempt to build a MonoX amplifier if you can find a schematic.
The performance from a diamond buffer style output stage can be extremely good (Nakamichi 620 amplifier, Marantz 300DC amplifier ...). Those you can find schematics for. I would suggest that looking at the schematics would give you better insight into this amplifier.
-Chris
I like this design, the sound should extraordinary but its price seems to be a little funny.
I will watch the progress with interest!
I will watch the progress with interest!
Hi,
Interesting design,
...found another schematic from the web...
, I didn't get the link to work from the 'preview post, so please
in Google, the images..... search for 'tbp-zero'
Also the patent..
Note the placement of the output transitors on the heatsink, avoid thermal runaway!
JPO Online Translation
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iDHT
Interesting design,
...found another schematic from the web...
, I didn't get the link to work from the 'preview post, so pleasein Google, the images..... search for 'tbp-zero'
Also the patent..
Note the placement of the output transitors on the heatsink, avoid thermal runaway!
JPO Online Translation
----------
iDHT
Hi,
Interesting design,
...found another schematic from the web...
in Google, the images..... search for 'tbp-zero'
Also the patent..
Note the placement of the output transitors on the heatsink, avoid thermal runaway!
JPO Online Translation
----------
iDHT
You mean this, right?
Attachments
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