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RAAL-requisite CA-1a Circum-Aural Ribbon Headphones - Over/On Ear RAAL REQUISITE CA-1a Ribbon Headphones with TI-1b amplifier interface for connection to any standard headphone amplifier. In original boxes with accessories. 30/11/23 receipt See my review here: - https://raalrequisite.com/wp-content/uploads/2023/01/Review-of-the-new-RAAL-REQUISITE-CA1a-pdf.pdf https://www.stereophile.com/content/raal-requisites-circumaural-ribbon-headset-ca-1a The CA-1a is a circumaural version of Raal's landmark SR-1a open baffle ribbon headphone. Unparalleled accuracy and realism in a soundfield devoid
At A$2,999, this asking price lands near the median of the typical used market for RAAL-requisite CA-1a headphones, which generally trade between A$1,800 and A$2,400 depending on condition and accessories, so it’s fair rather than a bargain—but notably above the A$1,800–A$2,000 range where excellent deals appear. For context, the alternative at this price point is often a used SR-1a with a dedicated amp, which offers similar ribbon magic but demands a much more powerful driver.
What makes the CA-1a a worthwhile buy is its rare Circum-Aural ribbon design that delivers electrostatic-like detail with warmth and body, excelling in micro-detail and transparency without fatigue. It’s a coveted, low-volume model with original-owner condition (AUD) and likely includes the CA-1a filter set and transformer box—key upsides that add value and justify the fair price. This clean listing of a well-loved, hard-to-find product at a fair price is a genuine buying opportunity for enthusiasts seeking ribbon uniqueness.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
RAAL-requisite emerged from a strategic partnership between two respected names in high-end audio: the Serbian RAAL group, renowned for ribbon tweeters and loudspeakers, and Requisite Audio Engineering, a California-based manufacturer of studio-grade components. The joint venture brought together decades of expertise in advanced driver technology and professional audio design, positioning the brand at the intersection of studio precision and consumer hi-fi.
The brand has carved a distinctive niche through ribbon-driver headphones, most notably the SR1a EarField™ Monitor—marketed as the world's first earfield monitor headphone—alongside the HSA-1b Switch-Drive amplifier. Rather than pursuing a broad product portfolio, RAAL-requisite has maintained laser focus on ribbon transducer technology across headphones and amplification, reflecting a philosophy of specialization over diversification. This narrow but deep product strategy underscores their commitment to mastering a single technology rather than competing across multiple categories.
RAAL-requisite occupies the upper echelon of the hi-fi market, serving discerning listeners, recording professionals, and mastering engineers who prioritize accuracy and sonic transparency above mass-market appeal. The brand's reputation rests on uncompromising engineering, premium pricing, and a devoted following within audiophile circles. Their positioning as a boutique, high-end manufacturer—rather than a mainstream consumer brand—reflects their target audience: those willing to invest substantially in specialized, purpose-built audio equipment.
See all RAAL-requisite listings on RADAR.
StereoNET
AU
StereoNET
AU
audio-markt.de
Good
audio-markt.de
Good
DE
HiFi Forsale
Good
