The Ultimate Troubleshooter for Audio Engineers
The Donner AT-1 Portable Audio Tester is a versatile diagnostic tool designed to solve problems before the show starts. Whether you are checking signal flow, testing cables, or verifying phantom power voltage, this compact device acts as the "Swiss Army Knife" of your audio toolkit. It is suitable for testing everything from powered PA speakers and mixers to effect pedals and IEM systems.
5-in-1 Diagnostic Suite
The AT-1 combines five critical functions into one rugged chassis:
- Signal Generator: Emits a 1 kHz sine wave or pink noise via XLR, 1/4", or 1/8" outputs with selectable levels (-10dB, -20dB, -40dB) to calibrate systems or trace signal paths.
- XLR Cable Tester: Instantly verifies continuity and pin integrity for 3-pin XLR cables.
- Input Metering: Visual LED indicators display signal presence (-20dBu) and peak levels (+10dBu) on the XLR input.
- Phantom Power Check: Safely tests 48V phantom power voltage and pin health to ensure microphones receive proper power.
- Signal Monitoring: Listen to incoming audio signals via the built-in 1/8" headphone jack or internal speaker.
Gig-Ready Design
Designed for the road, the AT-1 includes a protective carrying case with a belt clip, ensuring it's always within reach when troubleshooting on stage. It comes with a rechargeable internal battery (charged via USB-C) so you never have to hunt for AA batteries at the venue.
Key Features
- Multi-Format Output: Generates test tones via XLR, 1/4" TS, and 1/8" TRS jacks.
- Precise Level Control: Three selectable output levels (-10dB, -20dB, -40dB) for matching mic or line-level inputs.
- Cable Integrity: Quickly detects shorted or open pins in XLR cables.
- Visual Feedback: Clear LED indicators for signal strength and phantom power status (Solid: 44-52V / Flashing: 24-44V).
- Portable Protection: Includes a rugged carry case with belt clip.
Specifications
- Tone Generator: 1 kHz Sine Wave or Pink Noise
- Output Impedance: 350Ω (XLR) / 600Ω (1/4")
- Phantom Power Detection: 24V - 52V range
- Input Meter Threshold: -20 dBu (Signal) / +10 dBu (Peak)
- Included Accessories: 1/4" male-to-male adapter, USB-C charging cable, Carrying case
