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Installation 

Locate the Amplifier as close as possible to its final installation point. Allow access to the rear panel 
for making connections. 
The Monoblock  Amplifier is convection cooled, eliminating the need for fan or forced air cooling. 
When operating, the chassis should have at least five (5) cm (2 inches) of air space around the 
heatsink areas. 

 
 

Front & Rear Panel Function Controls 

Before attempting any system interconnection, please familiarize yourself with the front and rear panel 
controls of the Monoblock Amplifier. The descriptions below refer to the numbers and letters 
associated with the features in the diagram above. 

 

 
 

Front Panel 

1 INDICATOR LED 

The 

indicator led 

shows the operational status of your Monoblock Amplifier: 

Blue brightness 

indicates that the Monoblock is 

on 

and ready to be used. 

Red brightness 

indicates that the Monoblock is in 

standby

Completely off 

indicates that the 

rear panel AC mains switch 

has been 

turned off. 

If the amplifier will not turn on, you may want to check the 

rear panel AC 

mains switch 

, your AC connections, or have your dealer inspect the rear panel 

fuses (which are 

not 

user-serviceable). 

 

2 STANDBY BUTTON 

When power is applied to the Monoblock power amplifier, and assuming the 

rear panel AC mains 

switch 

is set to its 

on 

position, the amplifier remains in standby for few seconds and then switch on.  

Subsequent pressing of the Standby button will toggle the Monoblock between 

standby 

mode and 

fully 

on

.  

 

Rear Panel 

Caution! Turn the volume on your preamplifier all the way down before attempting to connect anything 
to your Monoblock Amplifier. 
Switch the Monoblock in standby when you need to connect or disconnect the speaker cables; make 
sure to avoid any shorts between the speaker cables before switch the Monoblock ON.   

 

 

1 BALANCED AUDIO INPUT 

Accepts a signal from a preamplifier with balanced outputs via a high quality XLR connector.  
Select the balanced input with the switch 3. 
 
The pin assignments of this XLR-type female input connector is: 

3

 

Pin 1: Signal ground 
Pin 2: Signal 

(non-inverting) 

Pin 3: Signal 

– 

(inverting) 

 
These pin assignments are consistent with the standards adopted by the Audio Engineering Society. 
Refer to the operating manual of your balanced output preamplifier to verify that the pin assignments 

Summary of Contents for MONOBLOCK

Page 1: ...Monoblock Amplifier Operating Manual North Star Design MONOBLOCK Power Amplifier ...

Page 2: ...Rev 1 0 February 03 ...

Page 3: ...losure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance Marking by the CE symbol shown left indicates compliance of this device with the EMC Electromagnetic ...

Page 4: ...ct 4 NEVER use flammable or combustible chemicals for cleaning audio components 5 NEVER operate this product with any covers removed 6 NEVER wet the inside of this product with any liquid 7 NEVER pour or spill liquids directly onto this unit 8 NEVER block air flow through heatsinks 9 NEVER bypass any fuse 10 NEVER replace any fuse with a value or type other than those specified 11 NEVER attempt to...

Page 5: ...he shipper if a claim is to be made Note Many shippers require notification and an inspection within twenty four 24 hours of delivery to ascertain the nature of damages incurred Your Monoblock Amplifier has undergone extensive performance evaluations listening tests quality control inspections and a minimum forty eight 48 hour burn in period prior to shipment and should be in a perfect operational...

Page 6: ......

Page 7: ...h your AC connections or have your dealer inspect the rear panel fuses which are not user serviceable 2 STANDBY BUTTON When power is applied to the Monoblock power amplifier and assuming the rear panel AC mains switch is set to its on position the amplifier remains in standby for few seconds and then switch on Subsequent pressing of the Standby button will toggle the Monoblock between standby mode...

Page 8: ...ct the output terminals of one amplifier to the output terminals of another amplifier We recommend speaker wires be connected to the Monoblock via high quality spade lugs either soldered directly to the cable or crimped with extremely high pressure or both crimped and soldered Connect a positive or red output post of the Monoblock to the positive or red input terminal of the appropriate loudspeake...

Page 9: ...ower amplifier All service of this product must be referred to a qualified North Star Design dealer or distributor TECHNICAL SPECIFICATIONS OUTPUT POWER CONTINUOUS RMS WATTS 8 OHMS 4 OHMS 100 WATTS 200 WATTS BANDWIDTH 0 1 Hz to 120 kHz 3 dB THD AND NOISE less than 0 1 at rated power DAMPING FACTOR greater than 100 20 Hz to 20 kHz 8 ohms OVERALL GAIN SENSITIVITY 26dB INPUT IMPEDANCE BALANCED UNBALA...

Page 10: ...n o r t h s t a r d e s i g n NORTH STAR DESIGN s r l VIA LENIN 132 56010 S MARTINO ULMIANO PI ITALY PHONE 39 050 859945 FAX 39 050 859166 E MAIL info northstar it WEB www northstar it ...

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