Reference50MKII pre amplifier and Cyber880 Stereo Power amplifier combination
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R50MKII is a 20dB gain line stage pre-amplifier using improved SRPP circuit with no global negative feedback.
The capacitors used for signal coupling is the exotic US AuriCap. All connections are point to point wiring using high purity copper hook up wire. The circuit board acts as a support frame for the tubes and other components and actual point to point wirings are done beneath the circuit board.
The power transformer and choke are shielded from the circuit board. A special silicon steel EI type power transformer and choke with good high frequency response is used together with large Solen MKP metallized polypropylene filtering capacitor.
The two tubes used in the main circuit has been changed to the fabulous sounding 12AU7. In order to match with tube power amps, the R50MKII has been redesigned based on the top model R1.1, to use components that has very little colored sound of their own, so that the R50MKII can clearly show off the sound of the tube power amp itself. A lot of satisfaction will then be achieved by trying out other exotic 12AU7 tubes like the Telefunken and Mullard. |
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Cyber880 is an extremely potent amplifier with power, superb definition, and great control. Using eight beam power output tubes and a low-mu octal driver, this amplifier possesses an uncanny ability to reveal every nuance in a recording, while preserve the emotion and feel necessary for a truly musical performance. In addition to finesse, it has great power, impact, control, and a low electrical noise floor. This remarkable overall character makes it suitable for use with speakers ranging from high efficiency to the most difficult and demanding.
he aluminum front panel and top cover are finished in hand rubbed silver metalic lacquer, with bias meter and tube adjustors that make it easy to maintain and optimize. Output matching taps are provided for 4, and 8 ohm speakers. |
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The Cyber880A uses eight 2A3 triode power output tubes and a low-mu octal driver, this amplifier has a amazing amount of musical clarity while at the same time possessing enough power to drive most speakers. You no longer need to worry if your already existing speakers can be driven by a tube amplifier, this eight tubed 2A3 amp can handle anything. This amp has very good output due to the 8 triode powered 2A3 tubes. In addition to this power it has finesse, impact, control, and a low electrical noise floor. This remarkable overall character makes it suitable for almost any music fan. It contains a solid 30 watts per channel (with low impedance) but with the charm of tubes. The aluminum front panel and top cover are finished in hand rubbed silver metalic lacquer, with a bias meter and tube adjustors that make it easy to maintain and adjust. Output matching taps are provided for 4, and 8 ohm speakers. |
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