Reynolds A-Type 4 – specification
Four-capsule tetrahedral first-order A-Format ambisonic microphone, hand-built by Jack Reynolds in the UK. Encodes to first-order B-Format (ACN, SN3D) with the supplied Atmoky/Reynolds A→B encoder plug-in.
Acoustic
| Array |
Four matched 14 mm cardioid pre-polarised condenser capsules in a tetrahedron, 11 mm array radius |
| Signal-to-noise ratio |
78 dB per capsule |
| Sensitivity |
−21 dB (±3 dB) at 1 kHz |
| Frequency response |
20 Hz – 20 kHz |
| Maximum SPL |
127 dB SPL |
Electrical
| Power |
24–48 V phantom (IEC 61938) on all four channels, about 3 mA per channel |
| Outputs |
Four balanced, transformer-less outputs on colour-coded Neutrik XX XLR-3M tails |
| Output impedance |
30–50 Ω |
Cable
| Standard |
3 m one-piece Mogami 4-way multipair cable from a LEMO 2B 8-pin plug, mating with the 8-pin socket on the mic body, to 30 cm colour-coded Neutrik XX XLR tails. Handmade by Jack Reynolds. |
| On request |
Split BBC-spec cable: LEMO 2B 8-pin EGG and PHG connectors with a separate LEMO EGG to XLR tails breakout, so the cable length can be changed without replacing the tails. |
Mechanical
| Body |
SLS 3D-printed nylon, nickel-coated for shielding and durability; Sorbothane capsule isolation |
| Weight |
75 g, microphone only |
| Kit option |
Custom Rycote BBG windshield, Rycote Windjammer, Radius RAD-2 shockmount (Reynolds edition, 19/25 mm clips) and plastic flight case |
In the box
A-Type 4 microphone, 3 m cable with XLR tails, Atmoky/Reynolds A→B encoder plug-in (macOS and Windows VST). Kit version adds the windshield, Windjammer, shockmount and case.
Specifications are subject to change without notice. Reynolds Microphones Ltd, registered in England and Wales no. 09106685. Registered office: 25 Baker Drive, Bishop's Stortford, Herts CM23 4ST. jack@reynoldsmicrophones.com · 07889 727365. Last revised November 2026.
