Used BSS MSR602/604II
Used BSS MSR602/604II units offer a 4-channel, one-by-four active microphone and line level distribution system capable of supplying up to 16 outputs from a single input, with transformer-coupled isolation and phantom power on each channel. Second-hand examples are a practical choice for live sound applications where reliable signal splitting between FOH and monitor consoles is essential. Scroll down to see the BSS MSR602/604II listings currently available.
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BSS MSR602/604II specifications
| Brand | BSS |
| Segment | Audio |
About the BSS MSR602/604II
The BSS MSR602/604II is a 4-channel active signal distribution system, with each channel providing an electronically balanced input (with transformer option), MIC/LINE switching, GAIN switching, phantom power, and active outputs for main FOH and monitor consoles. Two transformer-coupled feeds per channel offer 2500V isolation for applications requiring separation from the main PA system. The system can supply 4, 8, 12, or 16 outputs from a single input by combining MSR-604 II modules. The MSR-602 II power supply unit runs up to five MSR-604 II modules, provides headphone monitoring and signal metering, and two MSR-602 II units may be linked for fail-safe operation. Optional accessories include input and output balancing kits and a PSU adapter cable for compatibility with existing MSR-604 units.
BSS MSR602/604II — buyer FAQs
What is the BSS MSR602/604II and what does it do?
The BSS MSR602/604II is a 4-channel, one-by-four active microphone and line level distribution system. Each channel accepts a single input and can feed active outputs to main FOH and monitor consoles, while also providing two transformer-coupled feeds delivering 2500V isolation for any application that needs separation from the main PA system. The system can supply 4, 8, 12, or 16 outputs depending on how many MSR-604 II modules are combined.
Who makes the MSR602/604II and where does it sit in the BSS range?
The MSR602/604II is made by BSS Audio, originally Brooke Siren Systems, a British professional audio brand known for signal processing equipment including crossovers, compressors, limiters and networked digital signal processors. BSS is part of Harman Professional Solutions. The MSR602/604II sits within the brand's live signal distribution line, where the MSR-602 II acts as the power supply and monitoring hub for up to five MSR-604 II channel modules.
What does the MSR-602 II power supply unit do, and how does redundancy work?
The MSR-602 II is the dedicated power supply for the MSR-604 II modules and will run up to five of them from a single unit. It also provides a headphone monitor output and signal metering for the system. For fail-safe operation, two MSR-602 II units can be linked together, so a fault in one does not bring down the entire distribution system.
What should I check when buying a used BSS MSR602/604II?
Check which components are included, since the MSR-602 II power supply and MSR-604 II channel modules are separate units and a complete system requires both. Note whether any optional balancing kits (MSR-TIXII for inputs, MSR-TOXII for outputs) or PSU adapter cables for older MSR-604 type 1 units are present. Each listing on this page shows its specific configuration. Used units on 10K Used carry a 21-day warranty covering major functional faults; full details are in the buying guide at https://www.10kused.com/used-av-equipment-guide/.
What are the per-channel features of the BSS MSR604 II module?
Each MSR-604 II channel provides an electronically balanced input with an optional transformer, MIC/LINE switching, GAIN switching, phantom power, and active outputs for FOH and monitor consoles. In addition, each channel delivers two transformer-coupled feeds providing 2500V isolation, making it suitable for any application that requires electrical separation from the main PA system.
