A compact, battery-powered audio mixer built for square dance callers. Works with any powered speaker. Affordable, quiet, and ready for the road.
Designed from the ground up for beginning and intermediate square dance callers.
Up to 90 hours on a standard 9V alkaline, or 150 hours with a Tenergy lithium. One battery, dozens of dances.
6.9″ × 2.5″ × 3.75″ and just 12.5 oz with battery. Slips into any gear bag.
Two combo inputs accept Lo-Z XLR or Hi-Z Hilton™-compatible ¼″ — great for 2-caller events.
Two 1/8″ stereo music inputs, each with its own balance control for quick level matching.
Balanced XLR mono main out, plus a stereo 1/8″ monitor jack (Music L / Voice R) for monitor speakers or hearing assist.
Hardware schematics, firmware, and mechanical drawings are all freely available. Modify the design however you like.
Professional-grade specs in a compact, affordable package.
| Noise Floor | −80 dBfs |
| Music Bandwidth (±3 dB) | 20 Hz – 20 kHz |
| Voice Bandwidth (±3 dB) | 50 Hz – 20 kHz |
| Music EQ | Bass & Treble controls per channel |
| Mic EQ | Tone control per mic channel |
| Music Inputs | 2× 1/8″ stereo, with per-channel balance control |
| Mic Inputs | 2× Combo (Lo-Z XLR or Hi-Z Hilton™-compatible ¼″) |
| Remote Volume | 20 kΩ Hilton™-compatible 1/8″ plug |
| Main Output | Balanced mono XLR (male) |
| Monitor Output | 1/8″ stereo — Music (L) / Voice (R) |
| Width | 6.9″ (175 mm) |
| Height | 2.5″ (65 mm) |
| Depth | 3.75″ (95 mm) |
| Weight (with battery) | 12.5 oz (355 g) |
| License | Open Source Hardware, Software & Mechanical |
| Battery Type | Single 9V |
| Amazon Basics Alkaline (~$1.50) | ~90 hours |
| Tenergy Lithium (~$6.50) | ~150 hours |
| Typical dances per battery | ~30 (alkaline) / ~50 (lithium) |
Add a microphone, a pair of XLR cables, and a powered speaker — and you're ready to call.