Customaudiodesigns

Penrose Dual Phono Preamp, a black steel case with gold-plated RCA jacks Two Penrose preamps stacked, RCA jacks facing the camera A Penrose preamp board mid-build: capacitors, relays and gold RCA jacks A hard travel case with Penrose cables in foam
The Penrose Headphone Delay web app calibrating headphone delay against the booth monitors
CAD render of a horn throat with a mounting plate for two compression drivers CAD render of the Unity Horn: a 55 by 55 degree horn with six small drivers around the throat CAD render of the bookshelf speaker: a three-cell wooden horn above an eight-inch woofer
Grayscale photograph of a room fitted with a Penrose speaker system
Grayscale photograph of a turntable on a Penrose-built preamp
The Penrose sound system: stacked wooden scoop and bass-reflex cabinets on a pallet CAD render of one front-loaded horn subwoofer cabinet

We design and build custom high-end speakers and audio equipment.

Say hello

Brussels. Horns, subs, preamps, booth electronics.

Dual Phono Preamp

Two stereo RIAA preamplifiers in one compact case. 40 dB of gain for Moving Magnet inputs, RIAA equalisation with extremely low error and channel disparity, and an input stage you load to your cartridge.

See it in the store

Headphone Delay

Booth monitors arrive later than the headphones, so cueing never quite lands. This compact amplifier delays the headphone feed to match, measured automatically or set by hand.

See it in the store

Horns, drawn first

The Unity Horn is a 55° × 55° horn around two 12" and six 4" drivers, with a printed throat adapter that lets two compression drivers share the load and halve their distortion. The bookshelf speaker pairs a 60° three-cell horn with an 8" woofer tuned to 48 Hz.

Rooms that trust them

UMI, Brussels. Measured, filtered and tuned all three rooms from opening night, plus custom phono preamps for the DJ booths.

L'Altitude. High-efficiency two-ways built to fit the bar's art-deco wall furniture: a 15" woofer and a 2" compression driver on an Arai A-290 horn.

umibrussels.art laltitude.be

Where it started

A British-Jamaican-rooted sound system, built from a plan for the 15" scoop. Four voices, each amplified on its own after digital processing, and a five-channel preamp with four bands matched to the crossover points.

Keep going down.

Front-loaded horn subwoofer

Two 18" RCF drivers behind a stepped, folded horn: 500+ litres in a cabinet 145 × 78 × 64 cm. One takes 2400 W at 4 Ω and reaches 45 Hz at −3 dB. Stack two for 42. Stack four for 38.

Measured at 1 W, half-space. Tone is real, trace is slowed to be seen.

Say hello.

Tell us what the room is and what it has to do.

info@penroseaudio.be

Store Portfolio Designs

Say hello