SUN AUDIO SV-2A3 amplifier

This Japanese single-ended, vacuum tube amplifier can be purchased in ‘kit’ form or fully assembled.

Power output is 3.5 watts/channel.   Supplied with Russian Sovtek tubes – 2A3 (2), 6SN7 (2), 5U4G (1).   Amplifier weight is 16 kgs.

Input Sensitivity is high (150mV), so with the in-built volume controls, this amplifier will accept Line level sources easily. Continue reading

2A3PP amplifier – Upgrades

Update 21 Jun 2020:

This 2A3 Push-pull amplifier, built in 2009, has proven itself to be an excellent performer.  Compared with Single-Ended amps,  I am happy about the additional watts and improved bass control.

The design of an amplifier is more important than parts quality – don’t waste $$ on expensive parts in a poor design.

However, I think it is worthwhile to spend some more time and $$ on this amp. Continue reading

Magic and Microphony (Pt 1)

Real music has dynamics.  Macro-dynamics – with unrestricted headroom in crescendoes.  Micro-dynamics – with subtle low-level information.

Music should be reproduced also with a ‘time’ dimension.  Not just tempo, but each sound accompanied by an harmonic ‘envelope’, where overtones are produced and decay naturally – providing a sense of ambience, dimension and space. Continue reading