LUXMAN L-3/L-3B
¥ 59,800 (released in October 1978)
Commentary
A pre-main amplifier with low output and low sound quality.
The power amplifier uses a pure complimentary service OCL system. In addition, the power transistor and other devices themselves are carefully selected and used, especially those with high high-frequency cutoff characteristics and low collector capacitance. The operating point is set in the part with good linearity of each transistor to improve the distortion factor characteristics over the entire band.
The equalizer circuit, flat amplifier circuit and tone amplifier circuit of the pre-amplifier section use a two stage direct connection system. By increasing the current supplied to each circuit, low impedance is achieved and high-frequency characteristics are improved.
In addition, the circuit is constructed by carefully selecting ultra-low-noise transistors, and by driving with a negative power supply, the SN ratio is improved.
In order to minimize the distance of each input system and to eliminate shield wires, an input terminal board is provided at the bottom.
In addition, the signal path has been simplified for flatter characteristics and higher S / N ratio.
It is equipped with functions such as LUX type NF tone control, monitoring and dubbing function with two tape decks, high and low filters, and loudness control.
There were 2 types of L-3, the silver type L-3 and the black type L-3B.
Model Rating
Type | Integrated amplifier |
Continuous effective output (both channel operation) | 35W + 35W (8 ohm, 20 hz to 20 khz) |
Total harmonic distortion rate (20 Hz to 20 kHz) | 0.04% or Less (8 Ω, 35W) |
Intermodulation distortion factor (60 hz : 7 khz = 4 : 1) | 0.08% or Less (8 Ω, 35W) |
Output bandwidth | 10 Hz ~ 60 kHz -3dB (Distortion Factor 0.1%) |
Frequency characteristic | 15 Hz to 60 kHz - within 1 dB |
Input Sensitivity / Impedance | Phono : 2.5mV/50k Ω Tuner, Aux : 145mV/50k Ω |
SN ratio (IHF-A correction, input short) | Phono : 72 dB or more Tuner, Aux : 95 dB or higher |
Damping factor | 65 or More (8 Ω Load, 1 kHz) |
Tone control | LUX System NF Type (Left and Right Channels, Independent Level Control) |
Filter | Subsonic : 25 Hz, -6dB/oct. High Cut : 7 kHz, -6dB/oct. |
Attachment | Tape monitor circuit (2 systems) Tape dubbing circuit Loudness control Speaker selector (2 systems) Mode switch |
AC outlet | Power switch interlock : 1 system Power switch not linked : 1 system |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Power consumption (Electrical Appliance and Material Control Law) | 100W |
External dimensions | Width 438x Height 105x Depth 313 mm |
Weight | 8kg |