RAAL 1995 Immanis Open-Back Dual-Ribbon Headphones

IMMANIS is an open-back, circumaural headphone with a vented front chamber and RAAL 1995’s R³ true-ribbon triple-driver configuration. Released in February 2024, it uses three ribbon elements rather than a conventional dynamic, planar magnetic, or electrostatic driver system.

Its design is intended to combine the speed and low moving mass of true-ribbon drivers with the larger radiating area and output capability needed for full-range headphone use. The open-back construction and vented front chamber support a spacious presentation, while the triple-ribbon motor is used to increase surface area, excursion capability, and maximum SPL compared with a single-ribbon approach.

In use, IMMANIS is positioned as a top-tier headphone for listeners who want a highly resolving, fast, open presentation with wide spatial scale and strong transient response.

In the Box

• Headphones: IMMANIS triple-ribbon
• Ribbon Current-Drive Interface / Stand: RCD Interface 32 ohm (8 ohm and Viva by request)
• Cable, Amplifier to RCD Interface: RCD-XLR (XLR4 to XLR4), 1.5 m
• Cable, Headphones to RCD Interface: STAR-8 MkII Pure Silver, 1.8 m
• Case: Anodized aluminum, plush lined

Specifications

Motor

Configuration: Complementary Tuned Triple Ribbon

Ribbon Type: Corrugated pure aluminum true ribbon with Viscodamp™ “Silent Metal” viscosity dampening

Surface Area: 25.2 cm² (3.9 sq. in.)

Excursion: ±4 mm (0.157")

Maximum SPL: 118 dB

Impedance: 0.057 ohm

Impedance with Specialized HP Cable: 0.29 ohm

Ribbon Current-Drive Interface (RCDI-32, RCDI-8)

Purpose: Converts low impedance of headphones + cable (0.29 ohm) to impedance usable to amplifiers (32 ohm and 8 ohm)

Configuration: Toroidal transformer + specialized headphone cable (STAR-8, STAR-8 MkII)

Drive Type: Converts voltage drive from amplifier to current drive for ribbon

Supported Amplifier Type: Voltage drive amplifiers with low internal output impedance and DC offset less than 10 mV

Impedance that Loads the Amplifier: 32 ohm nominal (8 ohm and Viva by special order)

Recommended Amp Power, RCDI-32: Headphone amp of 2 W–6 W or loudspeaker amp of 8 W–25 W at 8 ohm

Recommended Amp Power, RCDI-8: Loudspeaker amp of 2 W–6 W at 8 ohm (SET or similar low-power amps for loudspeakers)

Headphone Body

Body Material: Glass fiber composite, aluminum

Finish: Anodizing, hard wax on American walnut veneer

Grille: Gold-plated 3-phase etched stainless steel

Headspring: Brushed stainless steel with TiAlN (titanium aluminum nitride) hard coating; polished stainless steel by special request

Headband: Soft cushion band, underside in diamond pattern cushion-stitched suede

Height Adjustment: Gold-plated 5-position click-stop

Earpads: Face: lambskin leather suede; fill: memory foam; inside: textile; outside: perforated sheepskin

Input Connectors: High-current gold-plated 3.5 mm TRRS female connectors

Weight without Cable: 626 g