A consultancy that became a converter maker.

Prism Sound was founded in October 1987 by two electronics engineers, Graham Boswell and Ian Dennis. Companies House records Prism Sound Limited as incorporated on 13 October 1987, with both men as directors. The pair had met in 1981 at Rupert Neve & Company in Cambridge, working on digital signal processing; Sound On Sound, in a 2023 history of the firm, says they were in the team developing the Neve DSP-1, which it calls the world’s very first digital recording console.

For its first six years Prism was a consultancy. The company says it worked on high-precision conversion for a Kelvin Hughes river radar from 1988, on public-address systems for London Underground, and on an all-digital commentary and communications matrix that the BBC used at the 1992 Barcelona Olympics — projects Sound On Sound also lists. It says it built a digital equaliser, the DEQ2400, as an add-on for a Neve transfer console, too.

In 1993 it turned to products. Its first stereo converters, the AD-1 and DA-1, sold to mastering and classical-recording studios; Sound On Sound says they quickly became industry standards for CD mastering, helped by Prism’s attention to dynamic range and low-level distortion. Because suitable test equipment did not exist, Prism built its own, starting with the DSA-1, a handheld analyser for the AES/EBU digital interface, which the company says followed a competitive bid to supply analysers to the Canadian Broadcasting Corporation. The AD-124 followed and, in the late 1990s, the AD-2 and DA-2.

ADA-8, Orpheus, SADiE and Lyra.

The 2000s widened the range. The ADA-8, a modular converter offering eight channels in each direction, arrived at the turn of the century — in 2001, the company says — and was later updated as the ADA-8XR for 192kHz sampling; in 2023 Sound On Sound’s Hugh Robjohns called racks of ADA-8XRs “a genuine ‘industry standard’.” The dScope Series III audio analyser followed in 2002. The Orpheus, an eight-channel FireWire interface, brought Prism conversion to project studios; Sound On Sound dates it to 2007 in one article and 2008 in another, and in its September 2008 review called Prism “a British manufacturer, mainly associated with very high-end digital converter technology.”

Growth came through acquisition, too. In February 2008 Studio Audio & Video Ltd, the Cambridgeshire maker of the SADiE audio workstation, went into administration, PSNEurope reported; in April Prism bought “the business and intellectual property rights of SADiE,” and in August it moved into SADiE’s former headquarters, a converted Victorian village school in Stretham, Cambridgeshire. The company says it also bought the Imerge home-media-server business in 2010.

USB interfaces followed: the Lyra 1 and Lyra 2, Titan and Atlas, launched from 2013, Sound On Sound says. Its reviews describe a family look, with the Titan in gloss white and carrying the “distinctive ‘rainbow’ meters” of the Orpheus. Many models share a fast-acting protective limiter that Prism calls the “Overkiller,” first seen on the ADA-8XR, Sound On Sound says. Prism’s Verifile system, which hides a checking code in the dither of each sample so that dropouts can be detected, reached its interfaces in 2018, the magazine says; the Callia DAC and preamplifier arrived in 2016, according to the company. The modular Dream ADA-128, which handles up to 128 channels, began shipping in 2023; reviewing it that December, Robjohns measured its line-input converter at 118.4dB on the AES17 test, above the 118dB he treats as full professional mastering quality.

Design and documentation.

The makers in this guide build the equipment that turns sound into numbers and back again — analog-to-digital and digital-to-analog converters, clocks, and the audio interfaces that connect microphones to computers. Their reputations were made in recording and mastering studios, and several now also sell to home musicians.

They are spread across Europe and the United States. Weiss Engineering is in Uster, near Zurich, according to its website. Prism Sound says it has been based since 2008 in the former SADiE building at Stretham, Cambridgeshire, after buying that company. Antelope Audio is the trading name of Elektrosfera Ltd. of Sofia, Bulgaria, according to its privacy policy.

In the United States, Benchmark Media Systems ships its orders from what it calls its factory in Syracuse, New York; Lynx Studio Technology gives its address as Costa Mesa, California; and Universal Audio is based in Scotts Valley, California, according to the companies’ websites.

Ownership varies more than location. Focusrite, of High Wycombe in Buckinghamshire, is the only listed company here: shares in its parent, Focusrite plc, trade on the London Stock Exchange’s AIM market, and the group also owns brands including Novation and ADAM Audio, according to Wikipedia. Universal Audio is privately held, Wikipedia says. Prism Sound’s studio business has operated since 2019 under Audio Squadron, alongside Tracktion and SADiE, while the original 1987 company is controlled by its founders’ firm, Companies House shows. For Weiss, Benchmark, Lynx and Antelope we found no parent company in the sources we checked.

This guide sets out what can be checked about each brand — who founded it, who owns it, and what it says about where its products are made — and marks clearly what rests only on the company’s own word.

One name, two companies since 2019.

The business divided in 2019. PSNEurope reported on 4 June 2019 that Tracktion, the music-software company, and 2JW Design had partnered with Prism Sound and SADiE “under the umbrella of Audio Squadron,” while Prism Media Products Ltd would continue the test-and-measurement business; Prism’s own history dates the move to 12 August 2019. Tracktion’s James Woodburn is a director of Audio Squadron Ltd, a UK company incorporated in January 2019, Companies House shows. The test-equipment side now trades as Spectral Measurement, which describes itself as “formerly Prism Sound Test and Measurement” and makes the dScope analysers — so Prism Sound is no longer, strictly, a test-equipment brand. The original 1987 company, Prism Sound Limited, is still registered and is controlled by Prism Media Products, the founders’ company, the register shows. SADiE stayed with the music side: Audio Squadron’s own website lists Tracktion, Prism Sound, SADiE and 2JW Design as its brands.

Today Prism Sound’s website carries an Audio Squadron copyright line and gives Audio Squadron’s address, at a business park in Ely, Cambridgeshire. The company calls itself “the world’s most iconic and trusted digital audio brand” and offers a five-year warranty on registered products. We found no statement on its pages of where its products are assembled. In May 2026 it warned buyers in Europe and the UK about counterfeit Lyra 2 interfaces, which it said had spread from Asian marketplaces to eBay.

For a design guide, Prism Sound shows how an engineering name can stay constant while the company behind it divides. Compare dCS, another British digital-converter maker, and RME. For this guide we use slate, ink and a spectrum violet with an amber accent, with a sans, an unofficial interpretation; no product or logo is reproduced.

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