Audio Database

Image of the SX 300
Commentary

A stereo receiver that embodies the charm of its components in a simple form.

The front-end of the FM tuner uses carefully selected FETs.

The equalizer amplifier uses a 2-stage direct connection NF type circuit.

Equipped with a loudness contour and a mono-stereo changeover switch.

Two auxiliary power outlets are installed.

Model Rating
Type FM/AM stereo receiver
FM Tuner Section
Practical sensitivity (IHF) 2.3 μ V
Capture Ratio (IHF) 3.5dB
S/N 65dB
Image Interference Ratio (82 MHz) 55 dB or more
IF Interference Ratio (78 MHz) 80 dB or more
Spurious interference ratio (82 MHz) 70 dB or more
AM suppression ratio 45dB
Harmonic distortion factor Mono : not more than 0.6%
Stereo : 0.8% or less
Stereo separation 40 dB or more
Carrier leak suppression ratio 35dB
Antenna 300 ohm balanced
75 Ω Unbalanced Type
<AM Tuner Section>
Practical sensitivity (IHF) 15 μ V
S/N 50dB
Image interference ratio 45 dB or more
IF interference ratio 35 dB or more
Antenna Ferrite bar antenna
Power Amplifier Unit
Effective power
1 kHz, both channel drive : 7W + 7W (4 Ω)
7W + 7W (8 Ω)
1 kHz, single-channel drive : 12W/12W (4 Ω)
10W/10W (8 Ω)
Harmonic distortion factor 1% or Less (Effective Output)
Cross modulation distortion factor 1% or Less (Effective Output)
Output Bandwidth (IHF, both channel drives) 25 Hz to 60 kHz
Output terminal Speaker : A, B, C, A + B
Headphones : 4 Ω ~ 16 Ω
Damping factor (1 kHz, 8 Ω) 20 or more
Preamplifier Section
Input Sensitivity / Impedance Phono1 : 2.5mV/50k Ω
Aux, Tape : 150mV/100k Ω
Phono maximum allowable input (rms/p-p) 130mV/360mV
Output Level / Impedance Tape rec:150mV
Tape rec (Din) : 30mV/80k Ω
Frequency characteristic Phono (RIAA deviation) : 30 Hz to 15 kHz ± 1 dB
Tone control Bass : ± 9 dB (100 Hz)
Treble : -11dB to + 8 dB at 10 kHz
Loudness contour (at Volume -40dB) + 10 dB (100 Hz), + 5 dB (10 kHz)
S/N (IHF, short circuit, A-network) Phono : 70 dB or more
Aux : 80 dB or more
<General>
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 36W (rated)
65W (max)
External dimensions Width 441x Height 132x Depth 324 mm
Weight 6kg