Big power in a slim, light rack box. The Studiomaster HX2-900 is a 2-channel digital power amplifier that gives you 2 x 765 W into 4 Ω from a 1U chassis weighing just 5 kg. It is made for installations, conferences, entertainment venues and smaller touring and rental rigs.
Why customers choose it
- Strong output: 2 x 450 W at 8 Ω, 2 x 765 W at 4 Ω and 2 x 1300 W at 2 Ω; bridged 900 W at 16 Ω, 1530 W at 8 Ω or 2600 W at 4 Ω.
- Light and compact: 1U high, 483 x 44 x 323 mm and 5.0 kg – easy to carry and rack.
- Built for real mains: universal 90-260 V AC supply with power factor correction (PFC).
- Clean sound: 105 dB S/N ratio, 0.02% THD+N and ±0.2 dB response from 20 Hz to 20 kHz.
- Flexible: stereo, parallel and bridge modes, multiple gain modes and an output limiter.
- Protected: overload, thermal and DC output protection, variable-speed fan cooling and status indicators.
Who it is for
Installers, event and rental companies, DJs, churches, banquet halls and clubs powering passive speakers and subwoofers, down to 2 Ω loads.
Specifications
| Channels | 2 |
|---|---|
| Power, stereo 8 Ω | 2 x 450 W |
| Power, stereo 4 Ω | 2 x 765 W |
| Power, stereo 2 Ω | 2 x 1300 W |
| Power, bridged 16 / 8 / 4 Ω | 900 W / 1530 W / 2600 W |
| Rating method | EIAJ, THD 1%, 1 kHz, both channels driven |
| Voltage gain | 35.6 dB |
| Input sensitivity | 1 V rms |
| Input impedance | 20 kΩ balanced, 10 kΩ unbalanced |
| Frequency response | 20 Hz – 20 kHz, ±0.2 dB |
| THD+N | 0.02% |
| S/N ratio | 105 dB (A-weighted) |
| Damping factor | 300 (8 Ω, 20-100 Hz) |
| Crosstalk | 80 dB |
| Inputs | Balanced XLR |
| Power supply | 90-260 V AC, 50/60 Hz, PFC |
| Protection | Overload, thermal, DC output |
| Size (W x H x D) | 483 x 44 x 323 mm (1U) |
| Net weight | 5.0 kg |
Good to know
- Runs on Indian 230 V mains; the wide 90-260 V range helps with voltage swings.
- Check your speaker’s impedance and power rating before using 2 Ω or bridge mode.
- Fits a standard 19-inch rack in a single rack space.
FAQ
Can it drive a subwoofer in bridge mode?
Yes, bridge mode gives 2600 W into 4 Ω or 1530 W into 8 Ω – match it to your sub’s rating.
Is it heavy?
No. It weighs 5.0 kg, which is light for an amplifier of this power.
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