The Marmitek Surround Anywhere 221 is a digital wireless surround sender that connects your rear passive surround speakers to your AV receiver without cables. The transmitter connects directly to your surround set's speaker output, so volume is always synchronised with the main system — no manual matching required. The receiver includes a built-in amplifier that drives up to 2 × 50 W (2 × 25 W RMS), making it compatible with standard passive speakers.

The 2.4 GHz digital link carries uncompressed audio with an overall latency of 20 ms or less, and the transmitter/receiver pair uses secure ID pairing so multiple sets can coexist in the same room (up to six pairs). The improved 2.4 GHz technology is designed to avoid interference with existing Wi-Fi equipment operating on the same band.

Key Features

• Uncompressed digital audio transmission at 2.4 GHz — better than CD quality, no interference, no audible delay
• Built-in amplifier in the receiver: 2 × 50 W (2 × 25 W RMS), sufficient to drive standard passive rear speakers
• Volume automatically tracks the surround set volume via direct speaker-output connection
• Secure ID pairing — up to 6 pairs can operate in the same room without cross-talk
• Improved 2.4 GHz technology minimises interference with existing Wi-Fi equipment
• Volume control on the receiver enables independent front/rear speaker balance adjustment

Product Benefits

• No speaker cables need to run along skirting boards or through walls to the rear speakers
• Passive speakers you already own can be used directly — no powered speakers required
• Latency of 20 ms or less keeps audio in sync with video on screen
• Signal to noise ratio of 80 dB and channel separation of 50 dB or more preserve audio quality
• Multiple pairs in the same area do not interfere with each other, making it suitable for adjacent rooms

Technical Specifications

• Model: Surround Anywhere 221
• Transmitter supply voltage: 230 VAC +10% −15% 50 Hz, 5 V / 600 mA
• Transmitter idle power consumption: <0.5 W
• Audio transmission method: Digital (uncompressed)
• Transmitter frequency: 2.4 GHz
• Transmitter pairing: Secure ID pairing
• Sample frequency: 48 kHz
• Audio input level (max): 11 V (RMS) @ 120 Ω
• Transmitter operating range: max. 30 m line of sight; max. 10 m through walls and ceilings
• Receiver supply voltage: 230 VAC +10% −15% 50 Hz, 18 V / 3600 mA
• Receiver idle power consumption: <2.5 W
• Receiver output power: 2 × 50 W (2 × 25 W RMS)
• Frequency response: 20 Hz–20 kHz @ 8 Ω
• Signal-to-noise ratio: 80 dB (transmitter/amplifier, A-weighted)
• Total harmonic distortion: <0.5% @ 1 W
• Overall audio latency: ≤20 ms
• Power efficiency: 78%
• Channel separation: ≥50 dB
• Box contents: 1 × digital audio transmitter, 1 × digital audio receiver, 1 × power supply for transmitter, 1 × power supply for receiver, 1 × speaker cable 60 cm, 1 × instruction manual

Why You'll Love It

• Cable-free rear speakers with no compromise on sound quality — identical setup to a wired surround system from the listener's perspective
• One-time secure pairing means no ongoing configuration or app required
• The rear speaker volume can be balanced independently of the front speakers using the receiver's volume control
• Works with any passive rear speakers you already own — no special speaker requirement