What is it?

Now my Nutube amplifier has new evolution. My previous one was operating at 12V (or 9V) but now it operates at 24 V, which provides more mellow and rich vacuum tube (Nutube) sound than before.

Why did you make it?

During my making ALL NEW headphone amplifier which operates at 20V by onboard voltage booster, I've noticed higher voltage operation of Nutube provides more vivid and mellow vacuum tube sound. This is due to the fact that, higher voltage operation provides more gain in vacuum tube stage and naturally Nutube more positively governs total sound quality. This time I made the revised power amplifier operates at 24V, which realizes ideal vacuum tube sound!!

This is the BEST power amplifier ever I've made!!

What makes it special?

• We can enjoy Vacuum tube sound without heavy instrument!

• By the sake of class-D high quality amplifier stage and MUSES stage, the sound from this tiny amplifier is the BEST ever I've made!!

• This item includes 100-240 V universal AC-DC adaptor (with US type plug). Can be used all over the world!

• Capacitors inside AC/DC are made in Japan (Nichicon/Rubicon), high quality and long life with very low noise (almost no noise) operation.

• Output impedance can be 4 to 32 Ohms.

Caution for usage

Please turn SW-OFF of amplifier for music source change. Hot plug-in/off of music source will not break circuit but may lead to unstable operation. Just OFF/ON cycle will recover from unstable state but we may avoid hot plug.

What is included in this item

Completed and tested amplifier, 100-240V/24V DC adaptor, plastic foot, plastic knob.

What is NOT included in this item

Speaker, audio cable