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RB 500

Single Pultec Style EQ

RB 500 is a compact passive equalizer inspired by classic Pultec designs, reimagined for the 500-series format. Featuring fully passive filtering based on 1960s analog equalizers, it delivers rich low-end weight and smooth high-frequency enhancement in an ultra-compact module. Transformer-balanced input and output using IGS Custom transformers, combined with a discrete driver stage, ensure musical tone, stability, and headroom. With independent frequency selectors for low boost and cut and a true bypass switch, RB 500 provides authentic analog equalization and characterful tone shaping in a space-efficient modular design.

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Classic Pultec-Style EQ in 500-Series Form
RB 500 translates the essence of classic passive equalizers from the 1960s into a single-slot 500-series module. Its design stays true to vintage principles, delivering musical curves and natural tonal balance.

Fully Passive Filtering with Modern Reliability
The entire EQ section is passive, allowing the filters themselves to shape tone without active amplification. This results in smooth, organic equalization that feels natural and forgiving.

Transformer-Balanced Signal Path
IGS Custom transformers on both input and output provide proper isolation, headroom, and harmonic richness. A discrete driver circuit ensures stable output levels and consistent performance.

Flexible Low-Frequency Shaping
Separate frequency selectors for low-frequency boost and cut allow precise sculpting of bass content, from adding weight and warmth to tightening low-end response.

True Bypass for Instant Comparison
A true bypass switch enables immediate A/B comparison, making RB 500 an intuitive and effective tone-shaping tool for tracking, mixing, and creative sound design.

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Testimonials

Our Raving Fans

★★★★★

I picked up two of their 500 Series modules and I’m blown away. The noise floor is low, the gain is clean, and the knobs feel like they belong on a much pricier unit. They’ve definitely become permanent residents in my…

Read moreI picked up two of their 500 Series modules and I’m blown away. The noise floor is low, the gain is clean, and the knobs feel like they belong on a much pricier unit. They’ve definitely become permanent residents in my signal chain.

Nur Hakim
★★★★★

We needed hardware that looks good in client-facing environments and performs consistently. Their products tick both boxes. The minimalist design is beautiful on camera, and the durability has been excellent.

Cheryl Wong
★★★★★

The dynamics processor is ridiculously good. Smooth compression, no weird pumping, and the controls respond exactly as expected. It’s become my go-to for vocals and acoustic guitars.

Darren Tan
★★★★★

We installed their signal distribution system across two rooms, and it’s been flawless. Zero hum, zero dropouts. The build quality is impressive — you can tell it’s made to last. Easily one of our best purchases this year.

Faridah Sulaiman
★★★★★

Our studio upgraded to their 19″ rackmount units and the improvement was immediate. The layout is intuitive, connections are rock solid, and the unit hasn’t glitched once. Setup took minutes and everything just works.

Asha Ravi
★★★★★

I’ve been mixing on these studio monitors for the past three months, and the clarity is honestly next level. The stereo imaging is tight, the low end is controlled, and the build feels solid. It’s the first time I’ve used…

Read moreI’ve been mixing on these studio monitors for the past three months, and the clarity is honestly next level. The stereo imaging is tight, the low end is controlled, and the build feels solid. It’s the first time I’ve used monitors in this price range that actually translate well outside the studio.

Jason Lim