
ISOPhase 6 Cabinet
6.5-inch custom Mid frequency driver and an ultra-light planar ribbon high-frequency transducer
EB110 Cabinet
EB110 seamlessly integrates with the ISOPhase 6 to provide controlled, articulate bass extension to 28Hz
HD Series Analogue Amplifier
Dual mono Class A/B Analogue studio amplification
XS-134 Analogue Crossover
Modular active systems control with metering, protection and long-run drive capability.
Powerhub 6
Dedicated mains purification with 61 purpose-built filter elements
Custom Power and Audio Cabling
Opus Audio designed Audio and Power cables
The ISOPhase System
Featuring a high-performance custom 6.5-inch custom Mid frequency driver and an ultra-light planar ribbon high-frequency transducer. The ribbon driver's extremely low moving mass enables it to respond almost instantaneously to musical transients, revealing subtle detail, ambience and dynamic information that conventional high-frequency drivers often fail to reproduce.
For applications requiring extended low-frequency monitoring, the EB110 seamlessly integrates with the ISOPhase 6 Cabinet to provide controlled, articulate bass extension to 24Hz. Rather than simply adding more low end, the system is engineered to preserve speed, definition and timing, ensuring the lowest frequencies remain as accurate and musical as the rest of the spectrum.
Wide horizontal dispersion ensures consistent frequency response across the listening position, creating a generous sweet spot that benefits both individual engineers and collaborative production environments.
The ISOPhase 6 monitoring system is designed not to impress with artificial enhancement, but to provide a truthful, revealing and fatigue-free listening experience that professionals can rely on throughout the creative process.
- Ultra Light Planar Ribbon Transducer
- 6.5 inch custom Mid Frequency Driver
- Extremely fast transient response
- Revealing subtle musical detail
- Articulate bass extension to 24Hz
HD Series Analogue Studio Power Amplifier
The Opus High Definition Series are dual mono Class A/B topology studio amplifiers with over a 40-year heritage, developed and refined in real-world professional applications.
Used with the ISO6 Cabinet and EB110 Sub Cabinets 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: : 3 years
XS-134 Analogue Crossover 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
Powerhub 6
A dedicated mains purification solution for recording studios and high-performance audio playback systems, designed to bring order, stability and consistency to the power feeding your equipment.
- 6-stage filtered power distribution
- Separate filtering stages per output
- Integrated star earthing reference
- Designed for cleaner, more stable power delivery
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.
Custom Colours
Custom Colours are available. Cabinets, Amplifiers and Electronics are handmade and assembled in our UK workshop in Cornwall

