Onkyo TX-4000 receiver

A new era in tuning accuracy and convenience with Quartz Synthesized All-Pushbutton Memory preset Tuning, Dual Super Servo System , and Linear Switching.

The Onkyo TX-4000 Quartz Synthesized Tuner/Amplifier is one of the most perfect stereo receivers we've ever designed. Nothing else in its price range provides the brilliant purity, dynamic headroom, and full excitement of its sound.

The Onkyo TX-4000 brings tuning accuracy to a new level of precision, with an advanced approach to quartz-synthesized digital tuning. And the amplifier section provides all the dynamic headroom demanded by today's audiophile recording techniques. Onkyo's exclusive Dual-Super-Servo System makes it possible, by allowing the power supply to perform as if it were 50-times larger. And there's more, LED power metering, memory to pre-set 6 AM and 6 FM stations, and elegant styling with a flip-down control panel.

Specifications

Amplifier Power: 45 watts per channel, min. RMS, at 8 ohms both channels driven, from 20 - 20,000 Hz no more than 0,04% T.H.D.

Total Harmonic Distortion:

0,04% at rated power

0,04% at 1 watt output

IM Distortion:

0,1% at rated power

0,004% at 1 watt output

Damping Factor:  40 at 8 ohms

Frequency Response:  20 Hz - 30,000 Hz (±1 dB)

RIAA deviation:  20 Hz - 20,000 Hz (±0,8 dB)

Input Sensitivity/Impedance:

Phono :  2,5 mV / 50 k Ω

Tape Play :  150 mV/50 k Ω

Tape Rec :  150 mV/3,5 k Ω (PH)

Input Sensitivity for 1 watt Output:

Phono :  0,35 mV

Tape Play :  22 mV

Phono Overload:  180 mV RMS at 1 kHz, 0,04% T.H.D.

Signal-to-Noise Ratio:

Phono :  76 dB (IHF A weighted, 1 watt output, 5 mV input); 85 dB ( A weighted, 10 mV input)

Tape :  80 dB (IHF A weighted, 1 watt output, 0,5 V input); 95 dB (A weighted)

Residual Hum and Noise:  0,8 mV at min.volume level (A weighted)

Tone Controls:

Bass :  ±12 dB at 100 Hz

Treble :  ±12 dB at 10 kHz

Filters:

High :  6 kHz, 6 dB/oct

Subsonic :  10 Hz, 12 dB/oct

Loudness (-30 dB):  +9 dB at 40 Hz;  +5 dB at 20 kHz

FM Tuner Section

Tuning Range:  87,9 - 107,9 MHz (200 kHz step)

Usable Sensitivity:

Mono :  11,2 dBf (2,0 µV)

Stereo :  19,2 dBf (5,0 µV)

50 dB Quieting Sensitivity:

Mono :  17,2 dBf (4,0 µV)

Stereo :  37,2 dBf (40 µV)

Capture ratio:  1,5 dB

Image Rejection Ratio:  45 dB

IF Rejection Ratio:  85 dB

Spurious Rejection Ratio:  80 dB

Signal-to-Noise Ratio:

Mono :  70 dB

Stereo :  65 dB

Alternate Channel Attenuation:  60 dB

AM Suppression Ratio:  52 dB

Harmonic Distortion:

Mono :  0,15%

Stereo :  0,25 %

Frequency Response:  30 Hz - 15,000 Hz (±1,5 dB)

Stereo Separation:   40 dB at 1 kHz;  30 dB at 100 Hz - 10,000 Hz

Muting level:  14,7 dBf (3 µV)

Stereo Threshold:  14,7 dBf (3 µV)

AM Tuner Section

Tuning Range:  530 - 1620 kHz (10 kHz step)

Usable Sensitivity:  25 µV

Image rejection Ratio:  45 dB

IF Rejection ratio:  30 dB

Signal-to-Noise Ratio:  40 dB

Harmonic Distortion:  0,8%

General Section

Antennas:

FM :  300 Ω balanced and 75 Ω unbalsnced

AM :  built-in ferrite core  and external terminal

Semiconductors:  3 FETs, 27 Transistors, 20 ICs, 70 Diodes, 31 LEDs

Power Supply:  AC 120 V,  220 -240 V, 50/60 Hz

Dimensions (W x H x D):  480 x 130 x 376 mm (19" x 5-1/8" x 14-3/16")

Weight:  11,4 kg (25,1 lbs)