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In the Forum: Horn-Loaded Speakers
In the Thread: SS Amplification for Compressions drivers? Sound?

Post Subject: Ebaen's "review" says it is single endedPosted by rickmcinnis on: 11/9/2010

And you are right that it also has a regulator within the power supply. This is stated within the owner's manual but it would not allow me to copy it. They use rather convoluted language. Maybe this is the result of translation?

To quote from the review (I hope this is O.K.)
The CA10's input stage with current feedback is formed by a resistively loaded single bipolar transistor (the current driving the input transitor varies with the output signal and is used for the feedback loop). The voltage gain stage runs another bipolar part with a constant current source fixed to a low-noise voltage reference. The single-ended output stage runs two bipolars, one for gain, one as load. Circuit gain is a high 24dB, input sensitivity a concomitant very high 0.55V. Bandwidth at -3dB is 5Hz to 150kHz. Input impedance is 100k, internal resistance below 200mΩ. Output noise is below 1mV unweighted from DC to 100kHz, DC offset less than 5mV. Dimensions are 17.7 x 13.4 x 5.5" WxDxH, weight is 32lb. There are no sound-degrading output relays but the power supply deliberately scales up the voltage over 20 seconds to prevent turn-on transients. Fragile high-efficiency drivers are thus deliberately protected. The absence of relays of course also means no hard shut-down. Turning the amp off means music will continue for a few seconds, fade, then progressively distort before evaporating to mute.

There seem to be a few of them for sale on the used market.

You assessment of this kind of thing would be interesting since most of us have nothing quite like your set-up to make assessments with.

Cordially,

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