LUXMAN L-309X
¥ 158,000 (released in August 1980)
Commentary
It is an improved version of L-309V and a pure DC configuration integrated amplifier with completely new contents.
In the power amplifier section using a DC configuration, elements with particularly short switching times, such as a ring emitter transistor (RET) in the output stage and an emitter ballast transistor (EBT) in the driver stage, are used.
In addition, notch distortion is reduced by taking various circuit measures such as setting the output stage to AB-class operation and setting the operation point at which as much current as possible flows over the entire power amplifier section.
The equalizer stage and flat amplifier stage of the preamp section are DC. Moreover, instead of lowering the output impedance by applying NFB deeply, the current as much as possible is applied to make the impedance low to improve bare characteristics and high-frequency stability.
A large toroidal power transformer and large toroidal power transformer and a block capacitor (15,000 μ Fx2) with sound quality.
It uses excellent parts such as newly developed sound quality improvement film and condenser.
In order to improve the S / N ratio during actual use, a 4-channel volume with a preset mechanism is installed to return the volume to the optimum volume level position.
It is equipped with a linear equalizer that compensates for subtle differences in characteristics across the entire spectrum of all program sources, as well as the tone control required for sound quality compensation.
Model Rating
| Type | Stereo integrated amplifier |
| Continuous effective output | 85W + 85W (8 Ω, both channel operation, 20 hz to 20 khz) |
| Total harmonic distortion factor | 0.01% or Less (8 Ω, 85W, 20 hz to 20 khz) |
| Cross modulation distortion factor | 0.01% or Less (8 Ω, 85W, 60 hz : 7 khz = 4 : 1) |
| Frequency characteristic | DC ~ 100 kHz -1dB or less |
| Input Sensitivity / Impedance | Phono1 : 2.5mV/100k Ω, 50k Ω, 30k Ω, 100 Ω (switchable) Phono2 : 2.5mV/50k Ω Tuner, AUX1, 2 : 150mV/50k Ω |
| Signal-to-noise ratio (IHF-A) | Phono1, 2 : 80 dB or more Tuner, AUX1, 2 : 100 dB or more |
| Tone control | LUX System NF Type with Bending Point Frequency Switching Low-pass curve point : 150 Hz, 300 Hz, 600 Hz High-frequency bending point : 1.5 kHz, 3 kHz, 6 kHz |
| Filter | Subsonic : 10 Hz, 20 Hz (-6dB/oct.) High Cut : 7 kHz, 12 kHz (-6dB/oct.) |
| Low boost | 100Hz(+6dB/oct.) |
| Attachment | Linear equalizer (downtilt2-level, flat, uptilt2-level) Volume preset mechanism Tape monitor circuit (2 systems) Tape dubbing circuit Attenuator (-20dB) Input impedance adjustment for Phono1 Speaker selector Headphone jack Speaker protection circuit with DC detection Overcurrent protection circuit |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 210W (Electrical Appliance and Material Control Law) |
| External dimensions | Width 481x Height 166x Depth 355 mm |
| Weight | 17.0kg |
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