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1957-8 RCA SFH-5 Mark IV ?
Posted: Sun Jun 21, 2026 1:27 am
by Hi-Fi-Mogul
That's what it appears to be.
These are nice performers.
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Re: 1957-8 RCA SFH-5 Mark IV ?
Posted: Sun Jun 21, 2026 1:33 am
by electra225
Does the "S" in the model number mean that it is stereo? In any case, with those big speakers, it should be a dandy! I wish it was closer.....
Re: 1957-8 RCA SFH-5 Mark IV ?
Posted: Sun Jun 21, 2026 1:40 am
by TC Chris
I'm guessing that if it's stereo, the 2nd channel was in a separate unit. The two-woofer plan for mono was common with Maggie, too--my '56 Provincial Serenade and Magnasonic both have two 12" for mono.
Chris Campbell
Re: 1957-8 RCA SFH-5 Mark IV ?
Posted: Sun Jun 21, 2026 8:36 pm
by William
That is one of RCA's conversion units. The amp is built to be stereo and yes to make it stereo you need the aux. speaker. There is a switch on the amp that that turns it from a PP mono amp to a single ended stereo amp. I have a blonde one with the aux speaker that is sitting in storage. The cabinets on both need restoration along with the guts.
Bill