Overview
Leveraging Automotive Audio Bus (A2B) architecture, this modular conference microphone routes uncompressed multi-channel digital audio and DC power across a single lightweight wiring harness. The physical footprint measures 3.6 x 3.6 x 0.9 in (92 x 92 x 24 mm) with a total mass of 0.25 lb (120 g), engineered to sit flush on conference tables using an integrated magnetic mounting base. Chassis construction incorporates at least 60% post-consumer recycled plastic, housing four discrete uni-directional cardioid capsules that deliver full 360-degree coverage across a 100 Hz to 20 kHz frequency response. In its native acoustic state, the capsule array maintains a 6.0 ft (1.8 m) pickup radius with an SNR exceeding 68 dB, expanding up to 14.1 ft (4.3 m) when paired with host-processed Poly NoiseBlockAI filtering.
From an electrical and operational perspective, the microphone operates strictly via low-voltage A2B signaling fed through dedicated 4-pin JST input and 3-pin JST output connectors, with included 19.7 ft (6 m) JST-to-Phoenix and 5.9 ft (1.8 m) daisy-chain cabling. The absence of mechanical switches eliminates actuation noise during active calls, replaced by a capacitive touch mute interface bordered by a multi-state status LED ring indicating call, mute, and pairing states. Passive thermal dissipation maintains operational surface temperatures safely within its rated 32 °F to 104 °F (0 °C to 40 °C) ambient window without internal forced cooling. The unit is designed for continuous enterprise operation, running solid-state circuitry with negligible idle current draw directly over the bus.
Deployment flexibility scales directly with the upstream codec architecture, supporting up to eight daisy-chained pods on the Poly Studio G62 and up to four on Studio X52, V52, X72, and V72 systems. Centralized firmware updates, acoustic diagnostic logs, and provisioning cycle through the Poly Lens cloud and local appliance management interfaces. However, the reliance on the specialized A2B bus and the companion Poly Studio A2 Audio Bridge establishes strict ecosystem dependency, precluding standalone USB audio operation or plug-and-play integration with non-Poly conference endpoints.
Technical Specifications
| Brand | Poly |
| Model | Studio A2 |
| Device Type | Modular Conference Table Microphone |
| Microphone Capsules | 4x uni-directional cardioid elements |
| Pickup Pattern | 360-degree beamforming array |
| Pickup Radius Native | 6.0 ft (1.8 m) |
| Pickup Radius Dsp Enhanced | 14.1 ft (4.3 m) with Poly NoiseBlockAI |
| Frequency Response | 100 Hz - 20 kHz |
| Sensitivity | -35 dB (V/Pa) at 1 kHz |
| Signal To Noise Ratio | >68 dB |
| Bus Interface | Automotive Audio Bus (A2B) |
| Connectors | 1x 4-pin JST input, 1x 3-pin JST output (Phoenix compatible) |
| Daisy Chain Capacity | Up to 8 units (Poly Studio G62), up to 4 units (Studio X52/V52/X72/V72), up to 2 units (Studio X32), 1 unit (Studio V12) |
| User Controls | Capacitive touch mute sensor with multi-color LED status ring |
| Chassis Material | Minimum 60% post-consumer recycled plastic |
| Mounting System | Integrated magnetic mounting plate with under-table cable channel |
| Dimensions | 3.6 x 3.6 x 0.9 in (92 x 92 x 24 mm) |
| Weight | 0.25 lb (120 g) |
| Operating Temperature | 32 °F to 104 °F (0 °C to 40 °C) |
| Storage Temperature | -40 °F to 158 °F (-40 °C to 70 °C) |
| Management Software | Poly Lens (Cloud / Appliance) |
- Automotive Audio Bus (A2B) infrastructure delivers synchronous uncompressed digital audio and power over streamlined daisy-chain cabling
- Quad-element cardioid array captures 360-degree audio with 100 Hz to 20 kHz response and up to 14.1 ft (4.3 m) range with NoiseBlockAI
- Capacitive touch mute control with 360-degree LED status ring prevents mechanical click artifacts during conferencing
- Compact magnetic table mount and 60% recycled polymer enclosure facilitate discreet under-table cable routing
- Requires proprietary Poly Studio A2 Audio Bridge and compatible Poly video codecs with no standalone USB audio mode
- Daisy-chain pod limits are constrained by host codec hardware, allowing only 1 to 2 pods on entry-tier video bars
Primary Sources & Audited Citations
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
- HP Poly Video & Voice Solutions - Formerly Polycom & Plantronics
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At a Glance
How reliable is the Poly Studio A2 Review: Modular Beamforming Conference Mic Array according to Mizex audits?
A streamlined, low-profile expansion microphone for Poly Studio video bars and codecs, offering clean daisy-chain scaling but restricted entirely to proprietary Poly A2B infrastructure.
What are the known quirks or drawbacks of the Poly Studio A2 Review: Modular Beamforming Conference Mic Array?
Our reliability audit identified the following documented caveats:
- Requires proprietary Poly Studio A2 Audio Bridge and compatible Poly video codecs with no standalone USB audio mode
- Daisy-chain pod limits are constrained by host codec hardware, allowing only 1 to 2 pods on entry-tier video bars
What are the key engineering highlights of the Poly Studio A2 Review: Modular Beamforming Conference Mic Array?
The top strengths recorded in our evaluation include:
- Automotive Audio Bus (A2B) infrastructure delivers synchronous uncompressed digital audio and power over streamlined daisy-chain cabling
- Quad-element cardioid array captures 360-degree audio with 100 Hz to 20 kHz response and up to 14.1 ft (4.3 m) range with NoiseBlockAI
- Capacitive touch mute control with 360-degree LED status ring prevents mechanical click artifacts during conferencing
- Compact magnetic table mount and 60% recycled polymer enclosure facilitate discreet under-table cable routing