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Stax CA-Y

Stereo Preamplifier (1979)

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Stax CA-Y

Specifications

Frequency response: 0.33Hz to 1500kHz

Total harmonic distortion: 0.0015%

Input sensitivity: 2.2mV (MM), 143mV (line)

Signal to noise ratio: 78dB (MM), 110dB (line)

Output: 3V (Pre out)

Dimensions: 435 x 88 x 381mm

Weight: 6kg

Year: 1979

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Comments

re: CA-Y

This fully DC-coupled was much ahead of its time with:
- high bandwidth (up to 1.5MHz)
- DC coupling
- fully discrete shunt type voltage regulator with high HF suppression

The separately available MC module (the IHA-Y head amplifier) uses a current mirror input which provides the perfect impedance adjustment for low to very low output MC cartridges.

The only weak points IMO:
- the finicky luminance regulation of the control lights. It uses a LDR element to regulate the supply voltage for the light bulbs. When the lights don't work it could be this circuit...
- the RCA connectors are not the most solid kinds. After so many years the plastic is a bit brittle. I replaced them by Neutrik ones that fit exactly in the existing positions.

You may want to replace the large power supply electrolytics as well when you are working on it. Mine had lost most of their capacity and had ver high HF impedance.

Compared to other (much more recent) gear in my system from Ayre and Spectral this CA-Y hands in a remarkable performance considering that it is 25 year older than them.

This website is not affiliated with or sponsored by Stax. To purchase CA-Y spares or accessories, please contact the company via their website or visit an authorised retailer.