Cayin 688R Integrated Amplifier

The 688R is even more powerful than the A-88T, with a potted toroidal power supply and potted output transformer for each individual channel.

This device is loaded with eight KT88 output tubes used for Class AB1 push-pull amplification. Output impedance is switchable between 2, 4, or 8 Ohms, and listeners can also choose between ultralinear and triode output modes. Four 12AX7s and two 6N6s are used in the built-in preamplifier. The 688R includes quality point-to-point wiring with premium capacitors and resistors. The unit is remote-controlled and comes with a detachable IEC-type power cord.

Technical specifications:

Device: Integrated vacuum tube amplifier
Frequency range: 20 Hz - 30 kHz
Total harmonic distortion (THD): 1% (1 kHz)
Unweighted signal-to-noise ratio: 89 dB
Input impedance: 100 kOhm
Output impedance: 2, 4, 8 Ohm
Input sensitivity: 400 mV
Output power (RMS): 2 x 100 Watt @ 8 Ohm (Ultralinear)
2 x 50 Watt @ 8 Ohm (Triode)
Input power: 440 Watt
Dimensions: 17.25 x 8.00 x 19.5 in
Weight: 35 kg
78 lb