Alto Professional Stealth 1 Mono UHF XLR Wireless System
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Alto Professional Stealth 1 Mono UHF XLR Wireless System
A pocket-sized plug-on transmitter and plug-in receiver pair that turns any XLR connection — mixers, powered speakers, dynamic microphones, outboard gear — into a wireless one, with 16-channel UHF, 100-foot range, and USB or battery power.
What It Is and Who It's For
The Alto Professional Stealth 1 is the wireless XLR system that lives in a back pocket or a cable pouch and solves problems on the fly. The concept is simple: the plug-on transmitter connects to any male XLR output — a mixer's send, a dynamic microphone, or a direct output — and the plug-in receiver connects to any female XLR input on a powered speaker, monitor, or piece of outboard gear. Match the channel on both units, and the XLR cable between those two points is replaced by a clean 100-foot UHF wireless link. Sixteen selectable channels with auto-scan give you the flexibility to find a clear frequency in busy RF environments, and the units run on either a single AA battery per side for 4-plus hours or indefinitely from any USB source. The Stealth 1 is equally useful as a dedicated installation accessory for eliminating cable runs, a stage tool for creating wireless monitor feeds, a backup system in an engineer's kit, or a solution for getting a dynamic mic on stage without running a line to the mix position. Both units are compact enough to be genuinely forgettable — until the cable would have been the problem.
Key Highlights
- Plug-on transmitter (XLR male output) and plug-in receiver (XLR female input) — replaces any XLR cable run wirelessly
- 16 selectable UHF channels with auto-scan to find the cleanest available frequency
- UHF frequency range: 542–566 MHz (US, CA, AU, NZ)
- 100+ foot operating range (line of sight)
- Mic and line-level signal compatible — works with dynamic microphones, mixers, powered speakers, and outboard gear
- Dual power options on both units: single AA battery for 4+ hours of runtime, or USB for unlimited operation
- LED display on top of each unit shows channel number at a glance
- Battery-ready LED confirms successful pairing between transmitter and receiver
- Single-frequency mono operation — no stereo complexity or additional pairing required
- Extremely compact and lightweight: receiver is 0.87" x 4.0" x 0.9" at 0.057 lbs; transmitter is 0.87" x 4.5" x 0.9" at 0.07 lbs
- Includes: Stealth 1 transmitter, Stealth 1 receiver, 2x Micro-USB to USB-A cables, user guide
True XLR Wireless — Any Connection
The Stealth 1 is not limited to a single use case the way a dedicated wireless mic system or a Bluetooth receiver is. Because it works at both mic level and line level, and because it plugs directly into male and female XLR connections, it can wireless-ify a dynamic mic, a monitor send, an outboard processor's output, or a direct feed from a mixer — whatever XLR connection currently requires a cable.
Flexible Power, No Surprises
The ability to run both the transmitter and receiver from USB is a meaningful operational advantage. Units that are in a fixed position — plugged into a powered speaker that lives on a stand, for example — can draw power directly from a USB port or wall adapter and run indefinitely. Units in a performer's hand or on a moving cart can run on a single AA battery for the full duration of most sets without interruption.
The Engineer's Go-To Backup
The Stealth 1's size and simplicity make it a natural addition to any live sound engineer's kit. It weighs almost nothing and fits easily beside a cable tester or a roll of tape. When a cable run fails, a wireless monitor feed is needed on short notice, or a performer needs freedom of movement that the stage layout does not accommodate, the Stealth 1 is already there.
Great Fit For
- Live sound engineers who need a compact, reliable wireless XLR solution in their emergency kit
- Performers using dynamic microphones who want cable-free stage movement without a traditional wireless mic system
- Musicians and venues replacing long cable runs between a mixer and a powered speaker or monitor
- Fixed installs — restaurants, houses of worship, conference rooms — where a permanent cable run between XLR-equipped gear is inconvenient or impractical
- Alto Busker users who want to place the speaker remotely while controlling the mix from a distance
- DJs and mobile entertainers who need a reliable wireless feed to an outboard speaker or monitor at a remote position
Practical Use
The Stealth 1 shines most in situations where the problem is a cable — either a cable that does not exist yet, a cable that failed, or a cable that would create a safety or workflow problem if it did exist. For a solo performer running a battery-powered PA like the Alto Busker, the Stealth 1 makes it possible to place the speaker across the room or at the end of a stage while keeping the source device or mixer in hand — without running a line. For a worship team or event production crew, it creates a clean wireless send to a floor monitor or fill speaker without hiring a rigger to run cable. For a dynamic microphone user who does not want the investment of a full wireless mic system, it transforms any SM58-style mic into a wireless one by plugging the transmitter directly onto the mic's XLR output. Single-frequency mono operation keeps setup straightforward — no stereo routing, no pairing complexity, and no app required.
Specifications
Every sound engineer who has run a long XLR cable across a stage or through a doorway knows the feeling — and the Stealth 1 is the answer to that feeling. At this size and this price, it is one of the most practical additions to any live audio workflow, whether it lives in a gig bag as a permanent backup or gets deployed as a dedicated solution for a specific part of a setup.
If you have questions about how the Stealth 1 would work with your specific speaker, mixer, or microphone setup, we are happy to talk through it. Give us a call or a text — this is exactly the kind of gear conversation we enjoy.
Reach us at 814-371-5666 — Spotts Music Center, Dubois, PA. Helping you make music.