A balanced input/output interface based on the sound quality concept of the Citation series. This is a transformer-type balanced input/output converter. The output is converted to a balanced output to eliminate sound quality deterioration problems caused by ground ground. It adds depth and thickness to the sound. *The cannon terminals are 1st ground, 2nd cold, and 3rd hot. There are some scratches on the exterior. Serial 806868 (Tamura Eiji)
Maintenance information: 2026.6.11 operation confirmed
Accessories: none
Main specifications: input/unbalance balance (high) balance (low) input/output/unbalance balance frequency characteristics 10 Hz to 100 kHz W151 x H88 x D226 mm weight 2.3 kg
A balanced input/output interface based on the sound quality concept of the Citation series. This is a transformer-type balanced input/output converter. The output is converted to a balanced output to eliminate sound quality deterioration problems caused by ground ground. It adds depth and thickness to the sound. *The cannon terminals are 1st ground, 2nd cold, and 3rd hot. The exterior is dull and dirty. Serial 806050 (Tamura Eiji)
Maintenance information: 2026.6.11 operation confirmed
Accessories: none
Main specifications: input/unbalance balance (high) balance (low) input/output/unbalance balance frequency characteristics 10 Hz to 100 kHz W151 x H88 x D226 mm weight 2.3 kg
Maintained! In addition to “High Voltage/High Current,” which is a unique amplifier technology, the HK series premain amplifier was created by adding new sound quality improvements. It's not flashy, but the full, astringent mid-range makes you listen to an attractive, stable sound. On the exterior, you can see a feeling of use such as scratches and dullness. Serial S158-04254 (Tomonori Asaine)
Maintenance information: 2026.4.17 maintained (LED light emitting diodes replaced at 6 locations, RCH drive circuit transistors 2SA933, 2SC1740, 2SD2240, 2SC4233 replacement electrolytic capacitors
220u/50v replacement board contact solder repair long-term sound output test) 2024.3.18 maintained (L channel output transistor 2SC3281 2SA1302 2SC3298A short circuit exchange adjustment semi-fixed VR 10KΩ 1KΩ 4 position contact failure exchange output board with solder crack solder repair each input/output connection sound output confirmation ※ This unit does not have a speaker relay, so there is a small pounding sound when the power is turned off (There are times when it comes out, but since adjustments have already been made, there is no problem)
Accessories: copy of instruction manual
Main specifications: output 120W+120W phono input/MM only with video input terminal W443xH160xD405mm weight 15.5 kg