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Cyrus Two Amplifier & Power Supply Upgrade

Posted 15th August 2016 at 03:28 AM by erictoucan

Cyrus Two would be the best selling and successful British Amp ever made. Definitely, it is the most important product to bring the market standing in its history.

After almost 40 years, it is still a very good amp around. Definitely, very good value for its second hand price.

Cyrus two phone section consists of super matched pair LM394 which is still the best matched pair today.

Here welcomes any idea to maintain and upgrade the Cyrus Two and its Power Supply to improve its performance to race with today's best amp.

For instance,

1. Replace the aged E-cap
2. Replace of coupling cap for better performance
3. Replace low value and better feedback resistor
with higher quality resistor.
4. Replace the important resistors in RIAA section
the best quality type
etc.

However, a lot of component and design is still very good like the Holden & Fisher power transformer is still unmatched quality outperforming a lot transformer in the market today unless you get the transformer used in top FM acoustic amp.

Please feel free to exchange your great idea here
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