Cambridge Azur 604 phono pre amplifier

Goal is to increase this cheap turntable preamplifier to something much better

Trying to get better sound.

How I did it

(UPDATED!) Due to incredible stupidity, I missed to replace all opamps. In the new pictures you can see that that’s done. I also added Silver Micas.

The full Cambridge Audio phono module board, its two copper-shielded input stages at the left and rows of red film capacitors across the middle

Close-up of the C2 to C5 pads where the removed capacitors were bridged with wire and sealed under a lump of dark adhesive

A Burr-Brown OPA2132PA op-amp seated in a turned-pin socket, surrounded by blue 10 nF film capacitors and replacement resistors

The board at an angle, showing the aluminium shield plate beside the reworked capacitor pads and, to the right, an NE5532 and the OPA2132PA

Two op-amps side by side, the original NE5532 on the left and the replacement Burr-Brown OPA2132PA on the right, under green and blue electrolytics

The finished board after the update, with red replacement electrolytics fitted across the input and supply sections

Corner of the board by the Cambridge Audio logo, red capacitors at C44 and C58 next to the original green and brown ones

Two tall red capacitors standing over the copper-shielded MM input stage

Red CE W capacitors laid over on their sides to clear the case lid, beside the Massuse relay