LUXMAN SQ507x Stereo vahvistin 220v

Erittäin hyvässä kunnossa vahvistin. Huollettu huhtikuussa 2023.

Yleinen sisäinen muuntaja 100-240V.

Commentary

Pre-main amplifier corresponding to the high power model of SQ505X.

The main amplifier section uses ± 2 power supply and all stages are directly connected without capacitor. The complimentary service stage uses pure output method combining PNP and NPN type power transistors to eliminate crossover distortion.

The previous stage consists of a two stage differential amplifier circuit to ensure stable operation.

The equalizer stage of the preamp section uses a new 3-stage direct connection circuit composed of PNP-NPN-PNP type transistors with high power utilization, and an emitter follower circuit is provided behind this stage to keep the input impedance of the Aux terminal high.

To reduce noise, we use ultra-low-noise transistors for all stages of the preamplifier section, and we use tantalum type and Mylar type coupling capacitors with low leakage current to reduce shock noise during switching.

The input impedance of the Phono1 terminal can be switched in three stages.

There is also a level set at the Aux connector.

Equipped with a low booster, high / low filter, and attenuator to increase the low frequency range.

The tone control is equipped with a curve point switch.

Model Rating

Type Solid-state integrated amplifier

Main Amplifier Section

Continuous output 50W + 50W (8 , both channels operating)

60W/60W (8 , single-channel operation)

Total harmonic distortion factor 0.04% or Less (8 , 50W)

Cross modulation distortion factor 0.04% or Less (8 , 50W, 70 : 7 khz = 4 : 1)

Output bandwidth 5 Hz to 50 kHz -3dB (0.04%)

Frequency characteristic 10 Hz to 60 kHz (within -1dB)

Input sensitivity 580 mv (8 , 50W)

Input impedance 50k

Damping factor 40 (8 )

80 (16 )

Residual noise 1 mV or less

Preamplifier Section

Frequency characteristic 10 Hz to 50 kHz -3dB (Aux1)

Total harmonic distortion factor 0.05% or Less (1 kHz, 1 V, Aux1)

Input sensitivity Phono1, 2 : 2 mV

Aux1 : 90 mV or more (adjustable)

Aux2, 3 : 80 mv

Input impedance Phono1 : 30k , 50k , 100k

Phono2 : 50k

Aux1 : 50k

Aux2, 3 : 200k

Signal-to-noise ratio Phono1, 2 : 63 dB or more

Aux1, 2, 3 : 80 dB or more

Maximum Allowable Input (1 kHz) Phono:300mV

Tone control LUX System NF Type with Bending Point Switching

Low Bend Point : Defeat, 150 Hz, 300 Hz, 600 Hz

High Frequency Curve Point : Defeat, 6 kHz, 3 kHz, 1.5 kHz

Residual noise 25 V or less

Crosstalk (1 kHz) Phono : -60dB or less

Aux : -65dB or less

Filter Low-cut : 70 Hz (-6dB/oct.)

High Cut : 6 kHz (-6dB/oct.)

Low booster 100Hz(6dB/oct)

Attachment Attenuator (-18dB)

Speaker switch (2 systems)

Premain isolation switch

Tape monitor (2 systems)

Recording output terminal (2 systems)

Semiconductor used Transistor : 33

Diode : 2 pcs

Varistor : 4 pcs

Power consumption 200W (8 simultaneous load at maximum output)

External dimensions Width 450x Height 160x Depth 268 mm

Weight 11kg