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Toshiba SB-404S

Four Channel Stereo Amplifier (1973-74)

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Toshiba SB-404S


Power output: 26W/ch into 8Ω (stereo), 15W/ch into 8Ω (quadraphonic)

Frequency response: 10Hz to 55kHz

Total harmonic distortion: 0.4%

Damping factor: 20

Input sensitivity: 2.5mV (MM), 30mV (ceramic), 150mV (line)

Signal to noise ratio: 65dB (MM), 70dB (ceramic), 80dB (line)

Output: 150mV (line), 30mV (DIN), 0.5V (Pre out)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 5 x IC, 27 x transistors, 10 x diodes

Dimensions: 400 x 280 x 115mm

Weight: 7.5kg


instruction/owners manual   English - faberreds

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Reviewed May 31st, 2015 by Silencio12

Great amplifier with a clear sound that outclasses easily modern amp's like Marantz PM703. The output is sufficient for 90 dB speakers with about 26 Watt.
It has a very level off definition in all frequentcy ranges and even the bass is tight and clear. Highly recommended for high level audio with FLAC and SACD files. The build is very solid and well done and the sound quality is impressive!



re: SB-404S

Toshiba made a very well build amplifier, in fact a quadraphonic amp witch is very durable and well build. I have this amp for over 25 years, after buying it second hand somewhere around 1990. It was several years in the bedroom of my daughter and i start to use it again because my 2 x 70 watt tube amp died. A high level amp with no feedback and a great sound (8 PLM 519). I connected the Toshiba and to my big surprise the sound was amazing. I used 192 KHz Flac files by laptop with AIMP3 and even normal CD with a Sony TV DAC and it was simply a great 3 D sound. My old Marantz CD 17 didn't come close to the sound by laptop and the Toshiba played like never before. A open wide staged and defined sound with never gets harsh. I switched to my Marantz PM7003 amp and what a deception, flat sound with not much fine detail and not very musically engaging. This little Toshiba (7,5 kg) amp is all about music! If you can lay your hands on one grab it! This amp outclasses a lot of modern stuff build for the specs and with lots of feedback witch damage the music.

This website is not affiliated with or sponsored by Toshiba. To purchase SB-404S spares or accessories, please contact the company via their website or visit an authorised retailer.