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BSS Audio 

               MSR-604ii User Manual version v1.4

Page 1

V 1.4

JMK

4

th

 December 1997

MSR-604ii

User Manual

This equipment has been tested and found to comply with the following European
and international Standards for Electromagnetic Compatibility and Electrical Safety:
Radiated Emissions (EU):

EN55013

(1990) Associated Equipment

RF Immunity (EU):

EN50082/1

(1992) RF Immunity, Fast 

Transients ESD

Mains Disturbance (EU):

EN61000/3/2

(1995)

Electrical Safety (EU):

EN60065

(1993)

IMPORTANT SAFETY INFORMATION
DO NOT REMOVE COVERS. NO USER SERVICEABLE PARTS INSIDE, REFER SERVICING

TO QUALIFIED SERVICE PERSONNEL. THIS EQUIPMENT MUST BE EARTHED.

IT SHOULD NOT BE NECESSARY TO REMOVE ANY PROTECTIVE EARTH OR SIGNAL

CABLE SHIELD CONNECTIONS TO PREVENT GROUND LOOPS. ANY SUCH

DISCONNECTIONS ARE OUTSIDE THE RECOMMENDED PRACTISE OF BSS AUDIO

AND WILL RENDER ANY EMC OR SAFETY CERTIFICATION VOID.

We have written this manual with the aim of helping installers, sound engineers
and consultants alike get to grips with the 

MSR-604ii 

and obtain its maximum

capability.
Should you have any comments or questions about applying the 

MSR-604ii 

series

within your application, please write to us, or e-mail us, at the addresses in the
warranty section. We welcome any comments or questions regarding the 

MSR-

604ii 

series or other BSS products, and you may contact us at the address or World

Wide Web site given in the warranty section.

interstage

Phistersvej 31, 2900 Hellerup, Danmark

Telefon 3946 0000, fax 3946 0040

www.interstage.dk

-

 pro audio with a smile

Summary of Contents for MSR-604ii

Page 1: ...ANY PROTECTIVE EARTH OR SIGNAL CABLE SHIELD CONNECTIONS TO PREVENT GROUND LOOPS ANY SUCH DISCONNECTIONS ARE OUTSIDE THE RECOMMENDED PRACTISE OF BSS AUDIO AND WILL RENDER ANY EMC OR SAFETY CERTIFICATI...

Page 2: ...6 1 Racking 11 6 2 Grounding 12 6 3 Channel coding 13 6 4 Dual power supply operation 13 6 5 Output drive level setting 13 6 6 Multiple output distribution amplifier configuration 14 7 Compatibility...

Page 3: ...capability Cost effective active electronic solutions proved elusive until the introduction of the original BSS MSR 604 overcame the problems of noise and headroom The current MSR 604ii further improv...

Page 4: ...lier versions of the MSR 604 The two FEED XLR connectors on the front panel offer microphone level transformer isolated and balanced outputs 1 2 MSR 602ii Power supply The MSR 602ii is the system powe...

Page 5: ...onnecting the MSR 602ii to the AC power source check that the voltage selector switch located on the rear panel is correctly set If a change is necessary ensure that the mains fuse is also changed for...

Page 6: ...d to be connected to the same grounding circuit the MSR 604ii has electronically balanced audio connections and does not need disconnection of any safety earth for the avoidance of hum loops 3 4 AC Po...

Page 7: ...eliable system set up since an individual MSR 604ii may be isolated and removed from the rack without disturbing the power to the rest of the system Ensure that the JACK SCREWS on the connectors are s...

Page 8: ...e level setting for configuring the output drive level Feed 1 Feed 2 front panel These two identical outputs are actively buffered fully transformer balanced and floating with primary secondary isolat...

Page 9: ...ue Listen Headroom meter The HEADROOM meter is calibrated to show signal level relative to the clip point In practice the red 0db LED will illuminate when the signal is approximately 0 5dB below actua...

Page 10: ...to 30dB to precisely match the input signal to the internal headroom of the MSR 604ii Combined with the very low inherent noise of the input stage this ensures that none of the dynamic range of the so...

Page 11: ...one that is closest in the chain to the PSU will register See section 4 MSR 602ii Controls for further details CAUTION ALWAYS TURN LEVEL DOWN BEFORE LISTENING TO UNKNOWN SIGNALS HIGH EFFICIENCY HEADPH...

Page 12: ...ipment 6 2 Grounding In any multi channel audio system where low level signals are being routed it is important to ensure a consistent and positive earthing system to minimise any possible noise inter...

Page 13: ...ich MSR is the actual system channel will become necessary and the small pre numbered self adhesive labels supplied with the MSR 604ii can be used for this purpose 6 4 Dual power supply operation fitt...

Page 14: ...1 Gain between input XLR and output XLR with channel Gain switch set to 0dB and input pad set to MIC NOTE The output levels are referred to using both dBm and dBu for different settings This is becau...

Page 15: ...Controls When a group of channels is linked as a D A the controls associated with the chosen input section are used to set the required operating conditions the controls on the other channels are dis...

Page 16: ...settings and provided that the Mk I units are installed at the end of the DC daisychain the performance of the MkII units will not be affected in any way Rack installation The Mk I MSR 604s should be...

Page 17: ...e the channel signal is not routed to the bus but is passed to the channel output stages The OUTPUT AMPLIFIER has two out of phase line driving outputs which are DC blocked and passed to both the bala...

Page 18: ...might be necessary to provide a transformer balanced input and provision has been made within the MSR 604ii for it s mounting Please order as MSR 604ii input transformer kit Z MSRTXIII 01 This is per...

Page 19: ...ou when the repair has been completed If the unit was purchased in the European Union you may as an alternative return the unit to any other BSS distributor in the European Union You should include a...

Page 20: ...via panel switch and LED indicator Outputs Main FOH Mon XLR 3M Electronically balanced Transformers optional Max level internally preset 3dBm 13dBm 23dBu Impedance 23 71 100 Max load 200 600 600 Feeds...

Page 21: ...er 0 1 3 6 12 26dB Via Listen switch momentary Headphone monitor on MSR 602ii PSU Via Listen switch momentary Stereo Mono 1 4in Jack socket Load Impedance 4 to 600 Max output 1W rms Level control 90dB...

Page 22: ...12 26dB ref clip Input via DC Loop out connector Headphone Monitor Via Listen bus and MSR 604ii Listen switch momentary Input via DC Loop out connector Connector Stereo Mono 1 4 Jack socket Load impe...

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