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Front view of Radii Audio MMS-300B tube amp. Note digital bias meter and stepped attenuator on front panel.
Side view. Note bias selector switch on left side. Bias of selected channel is displayed on digital display on front panel of amp. Can be switched off.
Close-up. Note controls for adjusting bias, hum for right channel
Another side view
Rear of amp, showing RCA inputs, speaker terminals (2 pairs) and IEC power receptacle.
Top view of upgraded JJ main caps
Close up of bias selector switch. The bias of the channel selected will be shown on the digital display on the front of the amp.
Top view, showing 300B and 6BM8 tubes, the upgraded JJ main capacitors, and the pots for adjusting tube bias and hum.
Side view showing 300B and 6BM8 tubes and bias selector switch
Closeup of logo of upgraded JJ main capacitor
Closeup of aluminum front panel, showing on/off switch and digital bias meter.
Closeup of aluminum front panel, showing stepped attenuator as well as digital bias meter.
Closeup of TJ/Full Music 300B mesh plate tube. A very balanced sounding, highly rated 300B tube. Also shown is Yugo Ei 6BM8 tube in foreground.
Closeup of right channel tubes (see caption of previous picture)
Closeup showing the bias and hum adjustment pots of the right channel
Upgraded JJ main capacitor. Coupling capacitors upgraded to MIT.
(Untitled)
Even closer shot of the 300B and 6BM8 tubes of the left channel