The MQ-88u is based upon the MQ-60 stereo power amplifier, still sought-after to date. It utilizes KT-88 power tubes by Slovakia JJ in triode mode. OY-type output transformers encased in cast aluminium housing provide low output impedance for ideal speaker interface. This unit is equipped with one each of fixed and variable inputs, the latter enabling direct connection with any source component without a pre-amplifier. Delivering 2 x 25W into 6 ohms it operates in pure Class A adopting Luxman’s long renowned vacuum tube circuit design. Tube complement comprises 2 x ECC83, 2 x ECC82 and 4 x KT88.
| Rated output | 25W + 25W (4Ω, 8Ω, 16Ω) |
|---|---|
| Input sensitivity | 890mV/25W |
| input impedance | 32kΩ |
| Frequency response | 20Hz to 20kHz (+0, -0.5dB) 10Hz to 100kHz (+0, -3.0dB) |
| Total harmonic distortion | 0.1% (1kHz/1W) 0.5% (20Hz to 20kHz/1W) |
| S/N ratio (IHF-A) | 105dB |
| Circuit | Driver: Mullard, Output tubes: Triode connection |
| Vacuum tubes | ECC83S×2, ECC82×2, KT88×4 |
| Power supply | 230V~(50Hz)/115V~(60Hz) |
|---|---|
| Power consumption | 170W, 140W (under no signal) |
| External dimensions | 440(W) x 184(H) x 230(D) mm 17mm front panel knob of and 28mm rear panel terminals are included in the depth measurement |
| Net weight | 16.1kg (main unit) |
| Accessories | Power cable |
| Speaker terminal Supported Y-lug terminal dimension | Width of part a: 14.5mm or less Width of part b: 7.5mm or more *Connection may be difficult depending on the shape of the Y-lug terminal |