RCA MI-4917a 1950s Passive Equalizer Filter High Pass/Low Pass EQ like Langevin, Altec, Cinema Engineering is a used item in good condition, listed on Reverb. The asking price is £560. It is offered by LeRoy Ltd through Reverb. It is in our Equalizers category. Used Gear Hunter first saw this listing on 24 October 2026 and last saw it on 9 November 2026. It has been seen 25 times in our scans. Prices are converted from the seller's currency when we scan the listing, so the amount you pay may differ slightly. The seller sets shipping, and import duty or VAT may apply, so check the final cost and the item's details on Reverb before buying.

From the seller

Very cool vintage unit for manipulating the sound of your signal. It is a passive High Pass/Low Pass unit that you can use to cut frequencies, or, if you use it to band pass, heavily manipulate a signal to create what RCA called "Sound Effects". I tested it out and it seems to be working fine, though I did not compare set frequencies to tones or do a full analysis. It is passive, so you will need to run some gain, like a preamp, after it to bring the level back up. If you are looking for something to thicken up a signal, give it a vintage vibe, and maybe even manipulate it a little, this would definitely do the trick! I ship quick and take packaging seriously. Will be fully insured, signature upon delivery.

RCA MI-4917a 1950s Passive Equalizer Filter High Pass/Low Pass EQ like Langevin, Altec, Cinema Engineering

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