Alto Stealth Wireless MKII UHF System for Active Loudspeakers

Don't run cables -- set your speakers up wirelessly with the Alto Stealth Wireless MKII, a UHF audio system with excellent sound quality and easy setup.

The Alto Professional Stealth Wireless MKII is a next-gen wireless solution that eliminates the need for up to 200' of speaker cabling. With Stealth Wireless MKII, it's easy to add wireless audio connectivity to any active loudspeaker without compromising audio quality. The system works perfectly well through walls, floors, and ceilings, providing setup flexibility that far exceeds conventional hard-wired systems. Adding Stealth Wireless MKII to your live sound rig will enable you to skip the long setup and teardown processes required of a wired sound system. This is the ultimate time and money saver.

Stealth Wireless MKII includes a single dual-channel transmitter with two removeable antennas. The front panel LCD screen with dual frequency display conveniently shows the RF frequency and channel as well as the AF signal level for each channel. Each system also includes two receivers. They feature slim-line, rugged plastic housings, with dual swiveling hinged antennae.

Stealth Wireless MKII can be set for mono or stereo use. Two XLR + balanced 1/4" TRS combo inputs on the transmitter accommodate the main outputs from nearly any mixing board or console. Each of the receiving units has a single 1/4" TRS output to send the signal to a powered speaker array or a traditional amplifier-and-speaker combo. Each Stealth Wireless MKII package comes with (2) 1/4" TRS to XLR cables so that you can plug into your system right out of the box.

For sound professionals, setup time, simplicity, read more and flexibility are of paramount importance. But any reduction in audio quality for the sake of convenience is totally unacceptable. Stealth Wireless MKII delivers exactly what professionals demand--faster setup/teardown, LCD displays for instant visual confirmation of system configuration, and uncompromised audio quality.


- Add wireless audio connectivity to any active loudspeaker
- Dual-channel transmitter (x1) with two XLR+1/4" TRS inputs
- Single-channel receivers (x2) with one 1/4" TRS output (per unit)
- Replaces up to 200' of console-to-system cabling.
- Reliable UHF band; up to 100+ selectable channels (regionally dependent)
- Adjustable squelch eliminates interference
- Grow your system using the Stealth Wireless Expander Pack (sold separately)
- Transmitter: (2) XLR + 1/4" TRS combo inputs
- Receiver: (1) 1/4" TRS output (per receiver)
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Dimensions and Weight in Packaging
Base Item
Shipping Weight: 3.5 lbs
Shipping Dimensions: 14 x 14 x 4 in
Manufacturer Part Number (MPN): Stealth Wireless MK2
Warehouse Resealed
Shipping Weight: 3.5 lbs
Shipping Dimensions: 14 x 14 x 4 in

Consumer Alert

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC's wireless microphone website at

NOTE: None of the wireless systems we carry are capable of violating the FCC guidelines stated above. We are presenting this information as a matter of legally required disclosure.

For support or warranty questions, please contact the manufacturer:
Phone: 401-659-8135

Reviewers gave this product an overall rating of 4.5 out of 5 stars. (2 ratings)
Submitted August 15, 2022 by a customer from

"Great tool for the engineering box"

Overall: 4.5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I have one of these for running remote speakers/delay stacks.The price seems like a lot until you factor in that it replaces around 400 feet of XLR cabling and sets up in minutes.The range is advertised as 200 feet, and it certainly seems capable of that as I still had 100% signal at 100 feet at the last show I did.My only complaint is with the power supplies. I'd rather have the units be a bit bigger and include standard IEC electrical connectors instead of non-roadworthy "wall wart" 12v external transformers.
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