hifi engine

Manual Library / Sharp Optonica

Sharp Optonica SM-4545

Stereo Pre/Main Amplifier

add a review (1 review)

Sharp Optonica SM-4545


Power output: 65 watts per channel into 8Ω (stereo)

Frequency response: 15Hz to 55kHz

Total harmonic distortion: 0.1%

Damping factor: 60

Input sensitivity: 0.25mV (MC), 2.5mV (MM), 150mV (line)

Signal to noise ratio: 75dB (line)

Output: 150mV (line), 30mV (DIN)

Speaker load impedance: 4Ω to 16Ω

Semiconductors: 1 x IC, 53 x transistors, 27 x diodes, 1 x LED

Dimensions: 17 3/8 x 5 5/8 x 15 inches

Weight: 35.3lbs


service manual   English - kingmace

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


 Login or register to post reviews

Reviewed Feb 24th, 2016 by Ralph DeScoville

I just bought this from a local and paired it with my Bose 901's, Series V - wow, just wow. Wagner's Ride of the Valkeries is just fantastic, as is George Harrson, Jimi Hendrix, et al. Greast amp, just now need tp figure out the purpose of the various cut outs - although my ear is workng the best for that.



Sharp Optonica SM-4545=SM-4000

The SM-4545 was sold as the SM-4000 in Europe.

This website is not affiliated with or sponsored by Sharp Optonica. To purchase SM-4545 spares or accessories, please contact the company via their website or visit an authorised retailer.