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Triode’s first integrated amp with KT150 vacuum tubes. Triode is now a brand that is recognized all over the world, but in order to appeal to the world as a Japanese brand, the model number was named “MUSASHI” after Saitama Prefecture, which is the home of Triode. Enjoy the powerful and exhilarating sound of the KT150 vacuum tube to your heart’s content.

Dynamic and powerful sound unique to KT150 vacuum tubes

The appeal of the KT150 vacuum tube is its dynamic and powerful sound. The circuit configuration of the output stage of class AB push-pull was selected to draw out its features to the fullest extent. The output is 100W + 100W (8Ω), and it drives various speakers powerfully and conveys the hot energy of music as it is.

A powerful power supply that supports powerful sound

In order to bring out the powerful sound of the KT150 vacuum tube, a powerful power supply suitable for the KT150 vacuum tube is required. The large-sized toroidal transformer is carried in the power transformer used as the key. In addition, a SiC Schottky barrier rectifier diode with fast response and low loss is used for the rectifier element. Combined with the toroidal transformer, it realizes an efficient, powerful, and quick-response power supply.

Easy bias adjustment while checking with a meter

Bias adjustment is necessary to keep the tube working optimally when the tube is replaced or used for a long period of time. With MUSASHI, you can easily check the bias current with the bias meter laid out in the center of the front panel. There is a bias selector and a bias adjustment volume on the top of the chassis. While checking the bias current of the vacuum tube selected with the bias selector on the meter, you can easily adjust the bias adjustment volume to the optimum value.

MAIN IN input terminal that can also be used as a power amplifier

MUSASHI is a pre-main amp, but it can also be used as a power amp with a simple switch. The rear panel has a MAIN IN input terminal and its ON/OFF switch. When the switch is turned on, the signal input to the MAIN IN jack bypasses the input selector and volume and is sent directly to the main amplifier circuit. You can enjoy it as a stereo power amplifier that allows you to fully enjoy the performance of the KT150 vacuum tube.

Beautiful stainless steel chassis and aluminum top plate

The first thing that catches your eye when you look at MUSASHI is the uniquely shaped 4 KT150 vacuum tubes, 3 large glossy black transformers, and the beautifully shining stainless steel chassis. Finished in a fearless design with a beautiful contrast between black and stainless steel. An 8mm-thick aluminum cutting top plate is attached to the top surface of the three transformers to reduce the vibration of the transformer and improve the heat radiation effect.

Simple and easy-to-use remote control included

It comes with a remote control that can be operated from a distance. Input switching, volume up/down, and muting operation are possible.


KT150 class AB push-pull integrated amplifier

Circuit systemKT150 class AB push-pull integrated amplifier
TubesKT150 x 4, 12AU7 x 4
BiasFixed bias, adjustable with bias meter
Output power100W+100W at 8 ohms
Frequency response8Hz-70kHz(-3dB)
S/N ratio93dB
Input sensitivityLINE 480mV, MM 2.5mV, MAIN IN 920mV
Input impedanceLINE 100k ohm, MM 47k ohm, MAIN IN 10k ohm
Input terminalsRCA unbalanced x 6(LINE1-4 , MM x 1, MAIN IN x 1)
Output terminalsTAPE OUT x 1(RCA unbalanced)
Speaker output terminals4~8 ohms
Equipped componentsHigh quality speaker terminal
Other functionsRemote control (Volume , Mute, Input select)
Bias adjuster with bias meter
Power consumption520W (190W/No signal)
DimensionsW440mm x D370mm x H220mm
AccessoriesTube cover , Remote control
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