SANSUI SAX-1000

Commentary

A high-grade stereo comprehensive amplifier that combines a high-output low-distortion audio section with a high-performance tuner.

GT tube 7591 is adopted for the power amplifier section to constitute a push-pull circuit of fixed bias system.
Combined with an ultra-wide-band output transformer, a music power of 96W and an effective output of 38/38W are achieved at a low distortion rate of 1%.

The FM tuner uses a cascode system with two stage New Vista and three stage variable capacitor.
It also incorporates a double limiter that eliminates noise regardless of the strong or weak electric field as a noise limiter, and a muting switch (squelch circuit) that automatically separates the low-frequency amplification stage when the input voltage of the receiver drops and eliminates inter-station noise that occurs during channel selection.
In addition, it is equipped with an AFC circuit for enjoying long-term stable FM and an SCA filter for shutting out interference of SCA broadcasting.

The preamplifier section consists of four transistors to reduce hum and noise.

Equipped with 8 input systems and Route 3 terminals, it can be used for various applications.
In particular, two Phono terminals are provided for easy use of the MC type cartridge.

Equipped with MT9P type socket, MC type cartridge can be used by inserting SANSUI matching transformers A-603 and A-604.

Switching matrix method is adopted for FM multi-circuit.

The tuner section has RF1-stage amplification.
Ferrite antenna is built-in.

With a center channel output terminal, it is compatible with 3D stereo.

The CR type is used for tone control.
It is also equipped with functions such as loudness, high-cut and low-cut filters, and presence.

Model Rating

Type	Integrated amplifier
<Audio section>
Music Power (IHFM)	96W
Effective power	38W/38W (when using one channel) 33W + 33W (when both channels are used)
Harmonic distortion factor	1% (at rated output)
Power Band Wiz (IHFM)	35 Hz to 15 kHz
Frequency characteristic	Aux : 30 Hz to 20 kHz ± 1.5 dB (at normal output)
Channel separation	Phono:55dB
Hum and Noise (IHFM)	Aux : -90dB at rated output Phono : -70dB at rated output
Residual Noise (Tone Control Flat)	1 mv (8 Ω)
Load impedance	8 Ω, 16 Ω
Damping factor	9.5(1kHz)
Input sensitivity (input required for effective output)	Phono 1 : 2 mV (0.06 mV when using Sansui input transformer A-604) Phono 2:2mV Tape head2mV Mic:2.3mV Aux 1:65mV Aux2 : 110 mV Tape mon (Pin) : 65mV/200k Ω Tape mon (Din) : 65mV/100k Ω
Center channel output	7.5V/1k Ω (at rated output)
Equalizer characteristics	Phono MAG:RIAA Tape head:NAB(19cm/sec)
Tone control	Bass : + 10 dB ~ -15dB (50 Hz) Treble : + 11 dB ~ -12dB (10 kHz)
Loudness control	+ 7.5 dB (50 Hz), + 7.5 dB (10 kHz)
High-cut filter	10 kHz, -11dB/oct.
Low-cut filter	50 Hz, -10dB/oct.
Presence	250 Hz (turnover frequency)
Other Functions	Tape monitor Headphone jack
FM Tuner Section
Receiving frequency	76 MHz to 90 MHz
Sensitivity	1.8 μ V (S/N20dB, Mod30%) 2 μ V (S/N30dB, Mod30%)
IF bandwidth	230kHz(-3dB)
Image ratio	52dB(S/N50dB)
Total harmonic distortion factor	0.8% (60 dB input, 30% Mod)
Frequency characteristic	30 Hz to 15 kHz ± 1 dB
<FM Multi Section>
Separation	38 dB (1 kHz, 60 dB input)
Total harmonic distortion factor	1.2% (60 dB input, 30% Mod)
Frequency characteristic	50 Hz to 15 kHz ± 1.5 dB
FM tuner unit included function	FM-AFC Muting Stereo indicator Tuning meter SCA Filters
<AM Tuner Section>
Receiving frequency	535 kHz to 1,605 kHz
Sensitivity	7 μ V (S/N20dB, Mod30%) 3 μ V (S/N10dB, Mod30%)
Image ratio	65dB(1,000kHz)
Selectivity	Narrow : 30 dB (± 10 kHz) Wide : 24 dB (± 10 kHz)
Functions attached to AM tuner part	Tuning meter Bar antenna
<General>
Used vacuum tubes, etc.	7591, etc., 21 vacuum tubes, 20 semiconductors
Pwer	100 VAC / 117 V, 50Hz/60Hz
Power consumption	180 VA (No Load) 280 VA (full load)
External dimensions	Width 454x Height 145x Depth 365 mm
Weight	18.6kg 20.3 kg (listed in separate catalog)