B&O Bang & Olufsen Beovox HT S45-2 type 6312, 1978-1982, made in Denmark

Manufactured: 1978 - 1982
Designer: Jacob Jensen
Colours: Rosewood, Teak

An exceptional little bookshelf speaker of hi-fi quality with a frequency range of 38 - 20000 Hz and less than 1% harmonic distortion.

You will find these speakers regularly recommended on BeoWorld. They have the same height and width as the lesser S35 speakers but are 3cm deeper and 1kg heavier. This small size difference makes an immense difference to the sound though. The extra filler drive unit adds hugely to the all important midrange sound and this is, to many users' ears, the best balanced bookshelf speaker made by B&O. What it lacks in ultimate bass, it repays in accuracy and tone. The optional floor stand is elegant and effective and worth hunting out. A capacitor change may be needed to make an old pair sing but you are very unlikely to be disappointed by purchasing a pair of these.

For those in search of more bass, S75s are the bigger brother but lack the sonic purity found in the S45.2. To beat these in this range, you need M100s and a bigger house!

Linear phase sound reproduction. Speaker units include a 20cm woofer, a special 8cm Phase Link unit, and a 2,5cm dome tweeter. Volume 25 litres; weight 7kg.

Link: beoworld | Resoration Crossover | radiomuseum | Catalogue

Optional accessory
adjustable aluminium pedestal
Price in 1978: £174.00

Type: 6312 (to Nov 1982)
Continuous load: 56 W
Music load: 75 W
Impedance: 4 - 8 ohms
Frequency response +4 -8 dB 38 - 20,000 Hz
Sensitivity: 5W
Gross volume|: 25 litres
Woofer: 20cm
Phase link unit 8cm
Tweeter: 2,5cm
Dimensions W x H x D: 26 x 48 x 21cm
Weight 7 kg

Hitachi SR-802 AM/FM Stereo Receiver, 1975-1976, made in Japan

Link: radiomuseum | hifiengine | service manual [PDF] 

Оконечник собран на оригинальных: Hitachi 2SC1343 & 2SA753 попарно в каждом канале.


Tuning range: FM, MW
Power output: 50 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 30kHz
Total harmonic distortion: 0.5%
Damping factor: 50
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MM), 85dB (line)
Output: 150mV (line), 40mV (DIN)
Power Source: 100V/120V/220V/240V 50/60 Hz
Dimensions: 490 x 144 x 400mm
Weight: 12.8kg
Year: 1975

Tuner Sections
FM Stereo Frequency Range: 88 -108 MHz
Usable Sensitivity (IHF): 1,7 µV
Harmonic Distortion Factor:
Mono : 0,15% (400 Hz)
Stereo : 0,25% (400 Hz)
Signal-to-Noise Ratio: 74 dB
Selectivity (IHF): 80 dB
Image Rejection Ratio: 85 dB
IF Rejection Ratio: 100 dB
Capture Ratio: 1 dB
AM Suppression Ratio: 55 dB
FM Stereo Separation: 45 dB (1kHz)

AM Frequency Range: 530 - 1605 kHz
Usable Sensitivity: 300 µV/m (S/N 20 dB, 20 µV (IHF)
Image Rejection Ratio: 50 dB
IF rejection Ratio: 50 dB
Signal-to-Noise Ratio: 50 dB
Selectivity (IHF): 35 dB

Audio Section
Music Power (IHF):
80 W/ch + 80 W/ch (8 Ω, 1 kHz, 0,5% THD)
70 W/ch + 70 W/ch (4 Ω, 1 kHz, 0,5% THD)
RMS Power Output (both channel driven): 50 watts per channel, min. RMS, at 8 Ω from 20 - 20,000 Hz, with no mor than 0,5% THD
60 W/ch + 60 W/ch (8 Ω, 1 kHz, 0,5% THD)
70 W/ch + 70 W/ch (4 Ω, 1 kHz, 0,5% THD)
Frequency Characteristics: 10 Hz - 30 kHz (±1 dB)
Harmonic Distortion:
At rated output : 0,5%
At ½ rated output : 0,05%
Power bandwidth: 10 - 40,000 Hz

Tone Control:
Bass : ±10 dB at 100 Hz
Treble : ±10 dB at 10 kHz

Spells Audio model AE-50, 1970-1972, made in Japan


Редкая двухполосная АС фазоинвертерного типа.
Лицевая панель отделана кожей или кожзамом
Фильтра первого порядка
Impedance: 8 Ohm
Music Power: 30 Watt
Информация о них есть в каталогах Highfidelity jahrbuch 6 u. 7.
Увы, в наличии данных каталогов у нас нет.