Serge Modular Variable Q Filter (VCFQ)

Marsoni

M251S

$304.50

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

Serge Modular Variable Q Filter (VCFQ)The Variable Q VCF (VCFQ) from Random Source is a skiff friendly Eurorack adaptation of perhaps the most famous Serge filter. It is a thick and colourful 12dB oct multimode filter with ultra smooth resonance that doesn't cease to amaze. Amazing tonal variety comes from combining outputs, automating resonance settings via CV, and adding grit using its adjustable gain input. Simple filtration is only one of the VCFQ's many uses, however. Its amazing

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We offer a 30-day return/exchange service after receiving.
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Very good product for the price - the front brushes wear fast compared to the original Eufy’s but for the value you do get a lot of product. So only 4 stars but just for the brushes “appearing to not last as long and bend but the buy is worth the extras. The filters look and work identical to the OEM. Good stuff - thanks!

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Reviewed in the United States on December 25, 2025

Verified Purchase

Eduardo

Natrona Heights, US

★★★★★ 5

Perfect fit, 11s running like new!

Style: with Pre-Filter

All parts fit perfectly. My vacuum lasts about 20 min longer since the filter isn’t clogging it. Also, replacing the spinning brush quieted it down significantly, it sounds like new again.

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Reviewed in the United States on May 20, 2026

Verified Purchase

kathp

Charlottesville, US

★★★★★ 5

Replacement parts

Style: with Pre-Filter

Was so happy to find the replacement parts for my eufy robovac. Really makes a big difference in vac performance.

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Reviewed in the United States on April 5, 2026