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SC Amp

TM

 Manual

 Important Safety Information

Safety Symbols

Power In Connector

CAUTION!

 Do not substitute the supplied AC power adapter. Substituting the AC power adapter 

may damage the product and introduce safety hazards. Only use power adapters supplied by or 
approved by Listen, Inc.

Power Out Connector

CAUTION!

 The Power Out connector on the rear panel is intended for powering certain Listen, 

Inc. products and peripherals designed for 24 VDC power sources and draw less than 1 A of 
current. It is protected from excessive current draw by an internal self-resetting fuse. Only 
connect products to this connector that have been supplied by or approved by Listen, Inc.

Heatsink and Output Connections

CAUTION! 

This product is designed for short-term use during loudspeaker testing. Surface 

temperatures of the rear heatsink can exceed 60°C under certain conditions:

z

When the Output terminals are connected to impedances nominally less than the minimum 

rated output impedance load of 4

z

When the Output terminals are inadvertently short circuited 

z

When the product is operated at or near the maximum rated output power of 35 W at a duty 

cycle exceeding 25%

z

 When the product is operated at ambient temperatures close to or exceeding the maximum 

rated ambient temperature of 40°C

z

When the product is operated with the output waveform clipped

z

When the product is loaded with loads other than a conventional loudspeaker with a voice coil

z

Combinations of the above conditions

The user should take precautions to avoid personal injury and damage to nearby objects should the 
heatsink exceeds 60°C. Keep all cables and wires away from the heatsink to avoid insulation damage.

Operating the product under the above conditions or with heatsink surface temperatures exceeding 60°C 
will not damage the product.

     

The exclamation point triangle is used to indicate that caution is necessary when operating the 
device or control close to where the symbol is placed, or to indicate that the current situation 
needs operator awareness or operator action in order to avoid undesirable consequences. This 
alerts the user to the presence of important operating and maintenance (servicing) instructions 
in the this manual.

     

     

     

Содержание SC Amp

Страница 1: ...eb www listeninc com Sales sales listeninc com Support support listeninc com Listen Inc 580 Harrison Ave Suite 3W Boston MA 02118 Tel 617 556 4104 Fax 617 556 4145 Web www listeninc com Sales sales li...

Страница 2: ...REV 051217...

Страница 3: ...nd Symbol erkl rungen 7 Informaci n de Seguridad y S mbolos 9 Introduction 11 Features 11 Front Panel 11 Rear Panel 12 Operation 13 Over Temperature Standby 13 Thermal Shutdown 13 Short Circuit Monito...

Страница 4: ...ii Contents SC AmpTM Manual Page Intentionally Left Blank...

Страница 5: ...use of handling of the Products against defects or damages arising from improper installation where installation is by persons other than Manufacturer against defects in products or components not man...

Страница 6: ...iv SC AmpTM Manual Limited Warranty Page Intentionally Left Blank...

Страница 7: ...purpose of the grounding type plug This apparatus should be connected to a receptacle with a protective earthing or ground connection 11 Protect the power cord from being walked on or pinched particu...

Страница 8: ...terminals are inadvertently short circuited zWhen the product is operated at or near the maximum rated output power of 35 W at a duty cycle exceeding 25 z When the product is operated at ambient tempe...

Страница 9: ...ikke sikkerheden ved stikket til jordforbindelse Denne enhed skal forbindes til en beholder med en intakt beskyttelsesleder eller jord forbindelse 11 Beskyt netledningen mod at blive tr dt p eller kle...

Страница 10: ...g medf re sikkerhedsrisici Brug kun str mforsyninger leveret af eller godkendt af Listen Inc ADVARSEL Power Out stikket p bagpanelet er beregnet til at forsyne visse Listen Inc produkter og periferiud...

Страница 11: ...t doit demeurer op rationnel en tout temps apr s l installation 10 Ne modifiez pas les fins de s curit de la fiche de type mise la terre Cet appareil doit tre branch une prise avec une connexion de mi...

Страница 12: ...t CA autre peut endommager le produit et pr senter des dangers de s curit Utilisez seulement des adaptateurs de courant fournis par ou approuv s par Listen Inc AVERTISSEMENT Le connecteur de l aliment...

Страница 13: ...darf nur an eine Steckdose mit Schutzerdung oder Masse angeschlossen werden 11 Das Netzkabel muss so gesch tzt werden dass niemand auf das Kabel treten kann und dass es nicht gequetscht werden kann D...

Страница 14: ...rrufen Verwenden Sie nur Netzteile die von Listen Inc geliefert oder zugelassen wurden VORSICHT Der r ckseitige Ausgang Netzanschluss ist f r die Stromversorgung bestimmter Listen Inc Produkte und Per...

Страница 15: ...dad del enchufe conectado a tierra Este aparato se debe conectar a un recept culo con una conexi n a tierra que sirva de protecci n 11 Proteja el cable de alimentaci n para que nadie lo pise ni quede...

Страница 16: ...rovistos o aprobados por Listen Inc PRECAUCI N El conector de salida de tensi n que se encuentra en el tablero trasero sirve para alimentar determinados productos y perif ricos de Listen Inc dise ados...

Страница 17: ...ting overload and high temperature conditions z SC Amp integrates seamlessly with Listen s SoundCheck audio test and measurement software and will also work well with other brands of test system z Fou...

Страница 18: ...input z Any voltage on this input up to 3 5 V will cause the output to be offset by the same amount z Low frequency AC signals 5 Hz can also be applied to this connector Line In Power amplifier audio...

Страница 19: ...to cool down for several minutes before turning on again If this does not reset the unit disconnect AC power from the power brick for several minutes and then try again Short Circuit Monitoring The ou...

Страница 20: ...to one amplifier output reduces the impedance of the load e g 8 Ohms in parallel with 8 Ohms equals 4 Ohms SC_Amp s performance will vary with loads below 4 Ohms Impedance Measurement When using SC A...

Страница 21: ...t to the differential output of the Impedance Interface Output which is essential for the correct operation of this circuit For BNC Device Output The BNC output can be connected to a 1 4 Tip Sleeve ma...

Страница 22: ...Output 1 is connected to the Line In of SC Amp z A DC Connect Stimulus Step in a test sequence controls DC Connect to send a 1 VDC signal to SC Amp z The sine sweep stimulus from the SoundCheck seque...

Страница 23: ...voltage Vp p of SC Amp Figure 7 8 shows a 2 VDC Offset applied which reduces the maximum potential output signal 0 V Positive Voltage Limit Vp p Max output voltage before clipping Negative Voltage Lim...

Страница 24: ...18 SC AmpTM Manual Operation Page Intentionally Left Blank...

Страница 25: ...ram SC AmpTM Manual 19 Block Diagram DC Input Zin 1M Limiter Low Pass Filter Level Indicator Output Current Recovery Amp 0 1V A Output Line In Zin 48k GND Lift 50 10nF High Pass Filter Power Amp DC In...

Страница 26: ...20 SC AmpTM Manual Block Diagram Page Intentionally Left Blank...

Страница 27: ...nloaded Fixed at 26 4 dB 0 1 dB Cooling Rear heatsink DC Input Input Connector Isolated BNC Impedance 1 M DC Gain Factor Unity DC Offset Range 3 5 V Maximum offset current to load 1 A Step Function Ri...

Страница 28: ...22 SC AmpTM Manual Specifications Page Intentionally Left Blank...

Страница 29: ...ltages listed on the supplied or approved AC power adapter z Transient Overvoltages up to the levels of Overvoltage Category II as required in the relevant standards listed on the Declaration of Confo...

Страница 30: ...T kV R M U U L V K M W L J n Q N T U J M R IV N J K X V J O o M R S K M N N V J O X Z J p n jM N q V R M K K T N S V R L Y r 8 s t e A u B v i w x G u B v x M R S K T R m T N jO kV X Z X Z J m T L L...

Страница 31: ...alified in the service of electronic instrumentation attempt repair Contact Information Contact the Listen office at 617 556 4104 Monday thru Friday between 9 AM and 5 PM EST Sales sales listeninc com...

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