TOA WH-4000A – Cardioid Headset Microphone
TOA WH-4000A – Cardioid Headset Microphone is backordered and will ship as soon as it is back in stock.
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TOA WH-4000A – Cardioid Headset Microphone
Product Overview
The TOA WH-4000A is a lightweight cardioid headset microphone built for hands-free speech in active environments such as gyms, aerobics studios, and group-fitness classes. Its unidirectional electret condenser element rejects off-axis noise to keep the presenter clear over music and crowd sound. An adjustable headband and moisture protection make it the sports-oriented companion to the WH-4000H, pairing with TOA WM-5325 and WM-D5300 wireless transmitters.
Product Description
The WH-4000A is the sports version of the WH-4000H, designed to stay put and stay clear during movement-heavy use. The unidirectional capsule focuses pickup on the wearer voice and reduces feedback risk in loud rooms with foreground music. An adjustable headband keeps the microphone secured to the head, and moisture protection guards the element against perspiration in fitness settings. Power comes from the host wireless transmitter, so there is no separate battery to manage at the microphone. It terminates in a 3.5 mm monaural plug that connects to the WM-5325 belt-pack or the WM-D5300 digital transmitter. For best results, the supplied windscreen is positioned slightly off the front of the mouth, 3 to 5 cm away, to control plosives. At 50 g with the cable included, the headset is light enough for extended classes and presentations. It is a practical choice for instructors, trainers, and presenters who need both hands free.
Key Features
- Cardioid pickup — The unidirectional element focuses on the wearer voice and reduces feedback in loud rooms.
- Adjustable headband — The band keeps the microphone secure during movement-heavy fitness and presentation use.
- Moisture protection — The capsule is guarded against perspiration, suiting gyms and aerobics classes.
- Transmitter-powered — Power is supplied by the host wireless transmitter, so no microphone battery is needed.
- TOA wireless compatibility — The 3.5 mm plug connects to the WM-5325 and WM-D5300 transmitters.
- Lightweight build — At 50 g including cable, the headset stays comfortable through long sessions.
Technical Specifications
| Type | Electret condenser |
| Power Source | Supplied from the wireless transmitter |
| Directivity | Unidirectional (cardioid) |
| Output Impedance | 600 Ω ±30 % (1 kHz) |
| Sensitivity | -66 dB ±3 dB (0 dB = 1 V/0.1 Pa, 1 kHz) |
| Maximum Input Level | 120 dB SPL |
| Output Terminal | 3.5 mm monaural plug |
| Cable Length | 1.3 m |
| Weight | 50 g (cable included) |
| Compatible Models | WM-5325, WM-D5300 |
Specifications per the TOA datasheet.
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