MSR-604 II
BSS
MSR-604 II
BSS MSR-604 II 1x4 4-Channel Active Signal Splitter
This 4-channel one by four, active microphone/line level distribution system is capable of supplying 4, 8, 12, or 16 outputs from a single input.
Each channel features electronically balanced input with transformer option, MIC/LINE switching, GAIN switching, LISTEN facility for monitoring via the MSR-602 II PSU, phantom power, active outputs for main FOH and monitor consoles, and two transformer-coupled feeds giving 2500V isolation for any application requiring isolation from the main PA system.
The system requires an MSR-602 II power supply, and is compatible with existing MSR-604 units (adapter cables required).
Each channel features electronically balanced input with transformer option, MIC/LINE switching, GAIN switching, LISTEN facility for monitoring via the MSR-602 II PSU, phantom power, active outputs for main FOH and monitor consoles, and two transformer-coupled feeds giving 2500V isolation for any application requiring isolation from the main PA system.
The system requires an MSR-602 II power supply, and is compatible with existing MSR-604 units (adapter cables required).
Product Weight: 8.4 lbs, 15.4 lbs for power supply
Dimensions: 19"W x 11.6"D x 1.75"H (1 RU)
Technical Tools
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Manufacturer Specs
Input Section
Impedance
Mic: 2kΩ
Line: 10kΩ, electronically balanced
Max. Input Level
Mic: +13dBu
Line: +33dBu
CMRR: Better than 90dB @ 1kHz>75dB 50Hz to 10kHz
Connector: XLR3-31 or equivalent
Phantom Power: 48V DC via panel switch and LED indicator
Outputs: Main (F.O.H) & Mon, electronically balanced
Impedance
+3 out: Less than 23 Ω
+13 out: Less than 71 Ω
+23 out: Less than 100 Ω
Connectors: XLR3-32 or equivalent
Max. Output Level: +3dBm, +13dBm, +23dBu, internally preset
Max. Load: +3 out: 200 Ω +13, +23 out: 600 Ω
Feeds, Two
Impedance: Less than 50 Ω
Max. Output Level: +3dBm
Max. Load: 600 Ω
Isolation: 2.5kV AC rms
Gain Functions
Gain: -40dB to +50dB
Gain Switch: -10, 0, 10, 20, 30 via panel
Mic/Line Pad: 0/-20dB via panel
Remote Pad: 0/-10dB via F.O.H phantom
Output Scaling: +20/+10/0dB via internal jumper blocks. (Main & Mon only)
System Performance
Frequency Response: +/-0.5dB , 20Hz to 20kHz
Noise (E.I.N)
-10dB gain: Less than -114dBu
0dB gain: Less than -121dBu
10dB gain: Less than -124dBu
20dB gain: Less than -125dBu
30dB gain: Less than -126dBu
Distortion (T.H.D): Less than 0.1% 20Hz to 20kHz @ 10dB below clip
Level metering and monitoring
Channel: Clip LED @ 1dB below clip
Headroom meter: On MSR-602 II PSU: Six point LED meter: -1, -3, -6, -12, -26dB via LISTEN switch (momentary).
Headphone monitor
On MSR-602 II PSU: via LISTEN switch (momentary). Stereo/Mono 1/4" Jack socket.
Load Impedance: 4Ω to 600Ω
Maximum Output: 1Wrms
Level control: -90dB to 0dB
Headphone Output
Via LISTEN bus and MSR-604 II
LISTEN switch. Input: via DC Loop out connector
Connector: Stereo/Mono 1/4" Jack socket
Load Impedance: 4 Ωs to 600 Ωs
Maximum Output: 4 Ωs:860mW rms. 200 Ωs:750mWrms
Level control: Continuously variable -90dB to 0dB
Headroom: Greater than MSR-604 II channel clip
Power
Power Requirements: 27V DC, DC from MSR-602 II PSU only
Connectors: 9 pin 'D', with lock jackscrews
MSR-602 II POWER SUPPLY FOR MSR-604 II
AC Input: 90-130/180-260 V AC 50/60Hz @ 150VA
Connector: 3-pin IEC with locking clip
Voltage Selector: Rear panel: 120/240 V
Switch: Rear panel, High-inrush
Fuse: Rear panel: F6.3A (120V)/F5A (240V)
DC Outputs
+27V unregulated @ 4A max: low ripple
-27V unregulated @ 4A max: low ripple
48V +/- 5% regulated @ 500mA max
Fuses: Rear panel: F5A (+27V); F5A (-27V); F500mA (+48V)
Connectors: 9-pin 'D' female: Loop out; 9-pin 'D' male: Loop return
System Ground Lift: Rear panel: Slide switch
Indicators: 3 LED's, post-fuse, on +27V, -27V and 48V outputs
Headroom Meter
Via LISTEN bus and MSR-604 II
LISTEN switch (momentary)
Six point LED meter: 0, -1, 3, -6, -12, -26dB
Ref clip input: via DC loop out connector
Impedance
Mic: 2kΩ
Line: 10kΩ, electronically balanced
Max. Input Level
Mic: +13dBu
Line: +33dBu
CMRR: Better than 90dB @ 1kHz>75dB 50Hz to 10kHz
Connector: XLR3-31 or equivalent
Phantom Power: 48V DC via panel switch and LED indicator
Outputs: Main (F.O.H) & Mon, electronically balanced
Impedance
+3 out: Less than 23 Ω
+13 out: Less than 71 Ω
+23 out: Less than 100 Ω
Connectors: XLR3-32 or equivalent
Max. Output Level: +3dBm, +13dBm, +23dBu, internally preset
Max. Load: +3 out: 200 Ω +13, +23 out: 600 Ω
Feeds, Two
Impedance: Less than 50 Ω
Max. Output Level: +3dBm
Max. Load: 600 Ω
Isolation: 2.5kV AC rms
Gain Functions
Gain: -40dB to +50dB
Gain Switch: -10, 0, 10, 20, 30 via panel
Mic/Line Pad: 0/-20dB via panel
Remote Pad: 0/-10dB via F.O.H phantom
Output Scaling: +20/+10/0dB via internal jumper blocks. (Main & Mon only)
System Performance
Frequency Response: +/-0.5dB , 20Hz to 20kHz
Noise (E.I.N)
-10dB gain: Less than -114dBu
0dB gain: Less than -121dBu
10dB gain: Less than -124dBu
20dB gain: Less than -125dBu
30dB gain: Less than -126dBu
Distortion (T.H.D): Less than 0.1% 20Hz to 20kHz @ 10dB below clip
Level metering and monitoring
Channel: Clip LED @ 1dB below clip
Headroom meter: On MSR-602 II PSU: Six point LED meter: -1, -3, -6, -12, -26dB via LISTEN switch (momentary).
Headphone monitor
On MSR-602 II PSU: via LISTEN switch (momentary). Stereo/Mono 1/4" Jack socket.
Load Impedance: 4Ω to 600Ω
Maximum Output: 1Wrms
Level control: -90dB to 0dB
Headphone Output
Via LISTEN bus and MSR-604 II
LISTEN switch. Input: via DC Loop out connector
Connector: Stereo/Mono 1/4" Jack socket
Load Impedance: 4 Ωs to 600 Ωs
Maximum Output: 4 Ωs:860mW rms. 200 Ωs:750mWrms
Level control: Continuously variable -90dB to 0dB
Headroom: Greater than MSR-604 II channel clip
Power
Power Requirements: 27V DC, DC from MSR-602 II PSU only
Connectors: 9 pin 'D', with lock jackscrews
MSR-602 II POWER SUPPLY FOR MSR-604 II
AC Input: 90-130/180-260 V AC 50/60Hz @ 150VA
Connector: 3-pin IEC with locking clip
Voltage Selector: Rear panel: 120/240 V
Switch: Rear panel, High-inrush
Fuse: Rear panel: F6.3A (120V)/F5A (240V)
DC Outputs
+27V unregulated @ 4A max: low ripple
-27V unregulated @ 4A max: low ripple
48V +/- 5% regulated @ 500mA max
Fuses: Rear panel: F5A (+27V); F5A (-27V); F500mA (+48V)
Connectors: 9-pin 'D' female: Loop out; 9-pin 'D' male: Loop return
System Ground Lift: Rear panel: Slide switch
Indicators: 3 LED's, post-fuse, on +27V, -27V and 48V outputs
Headroom Meter
Via LISTEN bus and MSR-604 II
LISTEN switch (momentary)
Six point LED meter: 0, -1, 3, -6, -12, -26dB
Ref clip input: via DC loop out connector