LUXMAN L-55A
¥ 119,000 (Released in November 1979)
Commentary
A pre-main amplifier equipped with duobeta circuit as a sister unit of L-58A.
Duo Beta Circuit means a circuit that combines two NFBs.
This circuit method does not require a large amount of NFB to improve various characteristics of the amplifier. Instead, various characteristics are improved by creating an amplifier with good bare characteristics and combining it with a small amount of NFB and DC servo.
Equipped with DC configuration MC head amplifier.
In this circuit, the gain is automatically adjusted according to the impedance of the cartridge.
The use of a buffered tone control circuit eliminates flat amplifiers.
Model Rating
| Type | Integrated amplifier |
| Effective power | 80W + 80W (8 Ω, both channel operation, 20 Hz to 20 kHz) |
| Total harmonic distortion factor | 0.02% or Less (8 Ω, 80W, 20 Hz to 20 kHz) |
| Input sensitivity | Phono MM, MC-1 : 1.5 mV Phono MC-2 : 0.05 mV (2 Ω) ~ 0.15 mV (40 Ω) Tuner, Aux1, 2 : 220 mv |
| External dimensions | Width 466x Height 181x Depth 378 mm |
| Weight | 15kg |