AM/FM Stereo Receiver
The SX-780 features a high output, low distortion power amplifier, a high fidelity equaliser amplifier with low noise and high gain, a high stability tuner section, tone controls with tone defeat function, built in protection circuits and independent power meters.
Tuning range: FM, MW
Power output: 45 watts per channel into 8Ω (stereo)
Frequency response: 5Hz to 80kHz
Total harmonic distortion: 0.05%
Damping factor: 30
Input sensitivity: 2.5mV (MM), 150mV (line)
Signal to noise ratio: 76dB (MM), 95dB (line)
Output: 150mV (line)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 5 x FWT, 11 x IC, 26 x transistors, 22 x diodes
Dimensions: 480 x 140 x 320mm
Accessories: FM T-type antenna
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Pros: Great warm sound, decent power, cool look (UV meters, dude!)
Cons: Power relay tends to go bad, phono stage is a little noisy (but still better than most of the era), pots tend to get scratchy with age
This is a great tuner. It seems to be underrated for the power it puts out (I have no trouble cleanly driving a pair of cerwin vega LS-12's). Sound is decently warm, but can be a bit muddy at times. Overall has a pretty nice sound on a variety of speaker combinations. The preamp stage is better than many other (standard) 70's tuners, but it still has a bit of electrical noise as integrated phono stages tend to have. The tuner portion seems to be a little sensitive, and doesn't really lock in as well as some of the old onkyo's did. - 7/10 by IOC386
I have nothing bad to say about this receiver! It is my first dive into the vintage hi-fi world and has been absolutely fantastic. I got this from craigslist off of someone who found it at an estate sale. $60 for the beast and they threw in some run of the mill Sherwood speakers. I got it home and plugged it in...no cleaning or repair, just plug and play! I upgraded to new Sony 4 way towers and the sound is impressive, crisp from a very low volume setting through house rocking volume (which can be accomlished at the 10o'clock setting!). Running my TV/DVD/CDplayer/Sansui turntable through it, with fabulous results. Who needs surround sound when you have Pioneer SX780 Stereo! - 9/10 by jarogerson