EQUIPMENT FORUMS >> CSP3 >> CSP3 with Large Solid State Amplifiers

Message started by Steve Deckert on 11/26/14 at 17:29:39

Title: CSP3 with Large Solid State Amplifiers
Post by Steve Deckert on 11/26/14 at 17:29:39

Hello Steve,
Would your CSP3 pre be a good match for the Odyssey Kizmet mono blocks? Any thoughts?


"The nominal power output is 175 watts RMS into 8 ohms, 320 watts into 4 ohms and roughly 600 watts into 2 ohms. Hobbyists report that the Odyssey amps are not only stable into 1 ohm but also that the power output easily reaches 1KW into that impedance. The DIY crowd also prefers these specific Sanken transistors as they can deliver in home-built designs a staggering 1000 watts into 8 ohms or 2000 watts into 4.
The Kismets are class A for the first 10 watts or so and then the more power-efficient class AB thereafter. Class AB is a push-pull affair implemented here with Sanken 2SA1216 and 2SC2922 epitaxial planar power transistor pairs. These ring-emitter devices are noted for their long-term stability and reliability and crank out something like 17 amperes each or 34 amps per pair at 50MHz. They’re pretty much loafing in audio-frequency applications. Each Kismet has four such pairs, giving a peak current capacity of over 120A with 6 to 7 amperes steady-state. The inherently high bandwidth of these devices supports a frequency response of 2Hz to 500kHz, which according to Klaus allows lower feedback correction, reduces listening fatigue and distortion. It’s not by chance that these Sanken transistors are designed into several of the radically more expensive Burmester, Electrocompaniet and Symphonic Line amplifiers.

The combined current and power is certainly helpful for driving speakers with unusual impedance curves such as the Wilson Audio Specialties Sasha W/P, which dips to 1.8Ω in the bass; or the electrostatic Martin Logan CLS that goes below 1Ω at the opposite extreme, the high treble. Continuous damping factor is rather high and over 800, suggesting that the amplifier output impedance is negligible at a nominal 8Ω speaker impedance. The overall gain is about 30dB with an input impedance of 22kΩ and input sensitivity of 1V RMS."


Perfect match.  The output level controls on the CSP3 are used to adjust the input sensitivity of the Kismet from 1 volt to whatever you want (typically around 2 or 3 volts) which then sets the stage for your master volume to have a wide usable range not to mention create a condition where the Kismet now sounds good at low and modest volumes, whereas now you have to crank it to achieve the right bloom.  Then there's the signature which will certainly enhance the sound of the amp that you can now change to your liking with a little tube rolling.  ;)


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