
HD Series
Dual mono Class A/B studio amplification with a long professional heritage.
XS-134
Modular active systems control with metering, protection and long-run drive capability.
DI-1000
Direct active interfacing between Opus systems and instruments or mixers.
HD Series Studio Power Amplifier
The Opus High Definition Series are dual mono Class A/B topology studio amplifiers with a 40-year heritage, developed and refined in real-world professional applications.
Used with high quality professional loudspeakers, the HD Series is designed to enhance performance and reliability. Within the wider Opus integrated studio monitoring approach, these amplifiers are intended to reveal intimacy, precision and dynamic control.
The design is directly coupled to the loudspeaker terminals with no relays or inductors in the signal path, helping deliver a very high damping factor across the full audio spectrum.
HD 500 Dual Mono: : 500W ~ 4Ω / 350W ~ 8Ω
HD 1250 Dual Mono: : 1250W ~ 2Ω / 900W ~ 4Ω / 625W ~ 8Ω
Format: : 2U × 510mm depth
Weight: : 30–35kg
Warranty: : 6 years
XS-134 Controller
The XS-134 is a modular active systems controller for stereo 2-way or mono 3/4-way use. It combines high headroom, RF suppression and a microprocessor-controlled auto-unmute facility to protect the system during power-on.
Easily changed filter cards employ proprietary asymmetric filter circuits, while perfect phase coherence and low distortion help define the wider Opus system character. Each input and output has a bar graph meter calibrated to correspond with the associated HD amplifier.
- 2-Way Stereo
- 3/4-Way Mono
- All-pass for mixing
- Power-up auto on unmute option
- Meters on all inputs and outputs
- Optional full range outputs
Configuration: : Stereo 2-Way / Mono 4-Way
Input impedance: : 10k Ohms
Input headroom: : +29dBu
Dimensions: : 483mm × 44mm × 251mm
Weight: : 7Kg
DI-1000 Direct Injection Processor
The DI-1000 is designed to provide direct active interfacing between Opus systems and instruments or mixers without sacrificing sound quality. It also incorporates the renowned Edge tone shaping facility, adding presence when required.
With comprehensive input and output level matching, plus phase and earth correction, it can drive long cable runs with negligible loss while remaining practical in real-world use.
- Transformerless design
- Ground Lift and Level Matching
- 'Edge' tone shaping presence
- Active parallel output
- Phase Correction
- 3 power options
Input Headroom: +9dBu (9v battery) +20dBu (24v external)
Configuration: Mono
Input impedance: 10k Ohms
Output: Balanced XLR (Mic or Line Level) - Unbalanced Mono TRS Jack
Signal to noise ratio: > 100dB
Construction: 2mm Aluminium / Steel Shell - Solid Aluminium Front Panel
Power Supply: 9v battery (24hrs continuous) - Phantom Power - External 9v to 24v
Dimensions - W: 105mm / H:61mm / D:112mm: W: 105mm / H:61mm / D:112mm
Signal integrity, system control, dependable drive.
If you’d like help choosing the right combination of Opus electronics for your setup, get in touch and we’ll be happy to provide specific requirements for your needs.

