Serious power for big speaker systems in a light 1U box. The Studiomaster QX2-1300 is a 2-channel Class-D power amplifier from Studiomaster UK’s QX series, rated 650W per channel at 8 Ω and 1100W at 4 Ω, with stable operation down to 2 Ω and bridge mode up to 3740W.
Why customers choose it
Who it is for
Sound rental companies, event and wedding PA providers, line array and subwoofer systems, auditoriums, churches and installations that need high power in little rack space.
What’s in the box
- Amplifier
- Power cord
- Speakon connector
- 4 feet
- User manual
Specifications
| Channels | 2 |
|---|---|
| Power, 8 Ω stereo | 2 × 650W |
| Power, 4 Ω stereo | 2 × 1100W |
| Power, 2 Ω stereo | 2 × 1870W |
| Bridged 16 / 8 / 4 Ω | 1300W / 2200W / 3740W |
| RMS output voltage | 72.1V |
| Slew rate | 50 V/µs |
| Input sensitivity | Selectable: 38, 35, 32, 29 dB |
| THD+N | 0.01% (10% rated power) |
| Frequency response | ±0.2 dB, 20 Hz – 20 kHz |
| S/N ratio | 108 dB (A-weighted) |
| Damping factor | 300 (8 Ω, 20–100 Hz) |
| Crosstalk | 90 dB |
| Input impedance | 20 kΩ balanced, 10 kΩ unbalanced |
| Power supply | 90–260V AC, 50/60 Hz |
| Protection | Low voltage, DC output, thermal, overload |
| Size (W × H × D) | 483 × 44 × 323 mm (1U) |
| Net weight | 9 kg |
| Type | Class-D power amplifier |
| Dimensions | 483 x 44 x 323 mm |
Good to know
- Turn the volume knobs fully down and power off before making connections.
- Use proper speaker cable for the outputs; use balanced input cables to reduce noise.
- Power ratings are EIAJ, THD = 1%, 1 kHz, both channels driven.
FAQ
Can it drive two speakers per side?
Yes. It is rated for reliable operation down to 2 Ω (1870W per channel).
Will it work on low or unstable mains?
The universal supply works from 90 to 260V AC with power factor correction.
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