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Phenyx Pro Quad-Channel Wireless in Ear Monitor System, Mono IEM System w/ 4 Bodypacks, 4x25 UHF Frequencies, Rack Mount, 164 ft Range, Wireless in Ear Monitor for Bands/Studio
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If the clunky, ear-splitting floor wedge had an arch-nemesis, it would be the Phenyx Pro PTM-33-4B. This 4-channel wireless in-ear monitor system takes the chaos of live stage sound and ondenses it into a sleek, rack-mountable powerhouse. It’s like giving your entire band a backstage pass to perfect audio clarity — without the tripping hazards or deafening feedback loops. You can finally roam the stage freely, lock eyes with your fans, and hear exactly what you need to hear, exactly when you need it.


A great performance requires great monitoring, but being tethered to a static wedge is a buzzkill. The PTM-33-4B delivers untethered freedom with audio so pristine, you'll think your sound engineer is hiding in your pocket. It's powerful enough for large stages, yet simple enough to set up before the drummer even finishes tuning.
Sharing a single monitor mix is a guaranteed recipe for band drama. The PTM-33-4B completely eliminates the guesswork by packing four independent channels into one base unit. Your bassist wants more kick drum? Your singer needs more vocals? Everyone gets exactly what they want, preserving band harmony on and off the stage.




Live gigs are notoriously brutal on gear. From cramped vans to aggressive roadies, your equipment needs to take a beating and keep on broadcasting. This system pairs heavy-duty construction with idiot-proof syncing, ensuring your sound check is entirely stress-free and your performance is bulletproof.
The Phenyx Pro PTM-33-4B is what happens when you prioritize uncompromised sound and total mobility. It captures the essence of professional touring setups while remaining an exceptionally accessible entry-level monitoring solution. It’s a creative tool for musicians who want to command the stage and elevate their live sound without any of the traditional headaches.


You can connect an unlimited number of bodypack receivers to a single transmitter base unit. As long as the receivers are tuned to the same frequency as one of the four transmitter channels, they will pick up the audio.
The PTM-33-4B is designed exclusively for mono audio. It delivers a crystal-clear, zero-latency mono signal that’s perfect for precise live stage monitoring.
Yes. The system features four stand-alone channels, allowing up to four band members to receive entirely separate, personalized monitor mixes.
The system operates in the UHF 500MHz range and features 4x25 selectable frequencies. You can easily use the one-touch quick IR sync to find and lock onto a clean frequency, avoiding local interference.
Absolutely. The PTM-33-4B comes with the necessary rack-mount brackets included in the package, making it simple to secure in any standard audio rack.
Crystal-clear mono audio without latency lasts throughout your whole performance
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