Alto Professional STEALTH-1 Wireless System

Alto Professional STEALTH-1 UHF Wireless System

Alto Professional STEALTH-1 is an ultra-compact and convenient wireless system that allows you to instantly get rid of cables. The set consists of a small transmitter and receiver that plug directly into XLR sockets. This system is perfect for converting dynamic microphones to wireless, sending signals to active speakers, or connecting a mixer to other equipment without extensive cable runs.

The system operates in the UHF frequency range (863–865 MHz in the European version), which ensures a reliable signal and less interference compared to 2.4 GHz systems. Users can choose from 16 channels to find the clearest frequency. The devices can be powered by a single AA battery (operating for more than 4 hours) or via a Micro-USB connection, allowing for unlimited operating time in fixed installations.

Key Features

• Versatility: Converts any XLR connection to wireless (for microphones, speakers, mixers).
• Power: Operates on 1 x AA battery (4+ hrs) or USB connection (unlimited).
• Channels: 16 selectable UHF channels for interference avoidance.
• Signal: Compatible with both microphone and line-level signals.
• Operating Range: Up to 30 meters (in open space).

Technical Specifications

• Manufacturer: Alto Professional
• Model: Stealth 1
• Type: Mono UHF Wireless System (Transmitter + Receiver)
• Frequency Band: 863 – 865 MHz (EU version) / 542 – 566 MHz (US version)
• Number of Channels: 16 selectable channels
• Operating Range: 30+ m (100+ ft)
• Connectors:
  • Transmitter (TX): XLR (female) input (connects to microphone or mixer)
  • Receiver (RX): XLR (male) output (connects to speaker or mixer)
  • USB: Micro-USB ports for power (5V, 150mA)
• Power: 1 x AA battery (for each device) or USB power
• Battery Life: >4 hours
• Dimensions: ~22 x 114 x 23 mm (Transmitter) / 22 x 102.5 x 23 mm (Receiver)
• Weight: 32 g (Transmitter) / 26 g (Receiver) (without batteries)

What's in the box?

• 1 x Stealth 1 Transmitter
• 1 x Stealth 1 Receiver
• 2 x Micro-USB to USB-A cables
• 1 x User Manual

Who is it for?

• Event hosts who want to turn their favorite wired microphone into a wireless one.
• Sound engineers who want to quickly send a signal to a remote active speaker ("delay line") without cables.
• Musicians and DJs who want to reduce the number of cables on stage.