Williams AV IMA-540 Maxim Receiver Amplifier, Amp Only
Williams AV | SKU: WS-IMA540
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Orders placed between Monday - Friday before
1:00 PM PST will most likely ship out the same day. We work hard to process and ship your items quickly so you can start enjoying them as soon as possible.
Found a lower price? Contact us and we'll see if we can match it! Price match will only be applied to products sold and shipped by authorized retailers of the brand.
No restocking fee will be charged when you opt for store credit. Exclusions apply.
Condition: New
Williams AV Maxim Receiver Amplifier, Amp Only
The 4th-generation Maxim™ is Williams AV’s flagship infrared classroom audio system, reimagined for hybrid and in-person learning. Configured in “Amp Only” mode, this unit provides full amplifier/receiver/mixer functionality—ready to integrate with your own choice of microphones and speakers to deliver powerful, intelligible sound across your learning environment.
Utilizing secure infrared (IR) wireless mic reception and internal digital Class-D amplification, Maxim™ ensures crystal-clear audio, easy conferencing, and reliable installation flexibility, all while supporting essential school integrations like paging, security alerts, and fire alarm muting.
Key Features
- Audio Output: 50 W RMS total (2 × 25 W Class-D amplification) powering up to four 8 Ω speakers.
- IR Mic Reception: Dual-channel infrared FM receiver for teacher/student microphones (e.g., Sapphire pendant or IRH handheld).
- Line Inputs: Four auxiliary inputs—including 3.5 mm (mic/line, computer with anti-hum) and dual RCA (DVD)—for flexible media connections.
- Conference Integration: EchoGuard™ for video conferencing, with dedicated front-panel “Conference” in/out for seamless audio-syncing and feedback reduction.
- Assistive Listening Output (ALS): Rear-panel 3.5 mm with level control for classroom AL systems.
- Paging & Security Compatibility: Page muting/pass-through, security alert, and fire alarm muting via contact closure interfaces.
- Remote Control & Automation: RS-232 access for volume and mute control; low-power standby mode for energy savings.
- Audio Safeguards: 5-band equalizer, Digital Feedback Guard (DFG), and anti-hum balancing on computer input.
- Charger Output: USB 5 VDC for compatible microphone charging docks.
Technical Specifications
- Amplifier Power: 2 × 25 W RMS Class-D (50 W total) into 4 Ω.
- Receiver Input: Infrared FM, 2 mic channels (850 nm, wide-band FM, Ch A: 2.08 MHz / Ch B: 2.54 MHz).
- Frequency Response: 20 Hz–20 kHz, ±3 dB; THD < 1% @ 1 kHz; S/N ratio ~65 dB.
- Line Inputs: 1 × dual RCA + 3 × 3.5 mm (mic/line switch + anti-hum computer input).
- Outputs: Front Conference out (3.5 mm); rear ALS out (3.5 mm) with gain control.
- Paging Input: 2-pin Phoenix; 4 V, 25 V, or 70 V; 51 mV sensitivity minimal.
- Security & Fire Inputs: Contact closure (COM/N.O./N.C.).
- Equalizer: 5-band, ±10 dB.
- Speaker Connector: 4-pin Phoenix, 4 Ω minimum load required.
- Charger Port: USB 5 V DC for docking (e.g. BRC-60/BRC-15 microphones).
- Power Supply: 19 VDC / 3.5 A (CE, CSA, UL listed).
- Dimensions: 7.5″ × 8.5″ × 1.75″ (19.05 × 21.59 × 4.45 cm).
- Weight: 1 lb 12 oz (0.794 kg).
What's Included
- Maxim™ Receiver Amplifier unit (Amp Only—no microphones, speakers, or mounting accessories included)
