Raysonic SP-88

Raysonic's SP-88 is considered as a one-of a kind integrated tube amplifier in the high-end audio market.Not only it has featured with all the line signal inputs found in most integrated amplifier but it also has a built-in phono amplifier for turnable input. We understand digital audio source is pretty popular in these  days and more  importantantly we acknowledge that record vinyl has made a strong comeback as well. 

The power tube 7591 used in SP-88 is a small beam power  tetrode,common in old hi-fi and some guitar amps.7591 was popular in early 1960s and was originally designed by Western Electric.Currently Sovtek now makes a direct replacement,the 7591EH,It is about 3/16" larger in diameter then the original 7591A,but works fine.If they don't have any then the amp must be converted to 6L6GCs (this is a considerable modification,it will give less output power).Note: JJ is manufacturing the 7591S,which is the same size and diameter of original 7591A.

Features

• Unique MM phono input tubes amplifier.
• Two pairs of 7591A output tubes operate in class AB1 design.
• 35 watts per channel. 70 watts-two channels.
• Double C-core Audio output transformers.
• Superior electronic components from U.S.A.
• Remote volume control.
• Aluminium chassis: black or silver.

Specifications

• Tube complement: 4 - 12AX7 / ECC 83 or equivalent dual triodes. 4 - 7591 / power pentode. 
• Rated power output, STEREO: 35 watts (R.M.S) into 8 or 4 ohm load; per channel
• Total harmonic distortion: 0.5 % (MAX) THD+N at rated power output
• Hum and Noise (A - Weighted): High level input: 96db below rated output. Low level input: 78db below rated output.
• Frequency response: High level input: +0, -0.2dB (At 1w reference power output from 20 - 20,000HZ)
• Input Sensitivity and Impedance: phono MM; 5mv / 47KΩ.
• High level input; CD. AUX. LINE. TUNER; 250mv / 100KΩ
• Speaker output impedance: 4 or 8 ohms
• Power consumption: 193 watts
• Dimensions: 44.5L x 31W x 21.5H (cm)
• Operating Voltage: 100-120VAC. 50Hz/60Hz (220-240VAC 50Hz/60Hz). 
• Weight: 25kg