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BSS Audio 

               MSR-604ii User Manual version v1.4

Page 5

2 Unpacking

As part of our system of quality control, this product is carefully inspected before
packing to ensure flawless appearance. After unpacking the units, please inspect
for any physical damage and retain the shipping carton and all relevant packing
materials, should the unit require repacking.
In the event that damage has occurred, immediately notify your dealer, so that a
written claim to cover damages can be initiated.
Because this equipment is connected between the microphone and mixing console
or patching system, it is important for safety and system noise that a proper
earthing system is implemented within the cabling system.

Consequently 

section 6.2; Grounding

 of this manual should be read prior to

installation and use.

3 Connections and control descriptions

3

.1   AC Power connections and control settings

Before connecting 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 one of the correct rating. Before
connecting the DC power leads, check that the system ground switch on the rear
panel is also correctly set to ‘earthed’.
The power cord attached to this unit carries the following information label.

WARNING: THIS APPLIANCE MUST BE EARTHED

IMPORTANT: 

The wires in this mains lead are colour coded in accordance with

the following code.

Green and yellow     :     Earth

Blue     :     Neutral

Brown     :     Live

As the colours of the wires in the mains lead of this appliance may not correspond
with the coloured markings identifying the terminals in your plug, proceed as
follows:
The wire which is coloured green-and-yellow must be connected to the terminal in
the plug which is marked with the letter ‘E’ or by the earth symbol, or coloured
green or green-and-yellow.
The wire which is coloured blue must be connected to the terminal which is
marked with the letter ‘N’ or coloured black.

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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