I-o47 Multimode Res Filter

Marsoni

M251S

$184.50

Get it in 3 business days with 1 day shipping. Friday, May 29

I-o47 Multimode Res FilterI 47 Multimode Resonator Filter is a modern take on a vintage circuit design inspired by the classic 1047 module of the ARP2500. It has been designed with some extra features and quirks built in. The internal VCAs are a new hybrid design of matched transistors and precision op amps. With CV controllable centre frequency, resonance Q and notch offset along side FM, strike and a complex dual input with wave shaping limiter, the I 47 is truly a filter

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Nice product, very simple in reality. All screws together. Shelves are probably 12inches high - higher than I wanted so I won't be using it after all - but that is my fault for not realizing how vertically spaced the shelves would be. The unit takes up a lot of vertical wall space. My only dislike (hence the -1 rating) is the large stamped letters on every wall mounting plate. The letters don't appear to mean anything, and are very large and upraised - to me they detract from the overall appearance of the unit. The letters are not possible to get rid of without a grinder or significant file-work and repainting everything (not worth the significant effort that would entail).

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Reviewed in the United States on October 25, 2025