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Rockford Fosgate PUNCH 4020 DSM manual U S I N G T H E Xcard

Models: PUNCH 4020 DSM

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U S I N G T H E XCARD

U S I N G T H E XCARD

The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range operation. These cards are shipped in the most common fre- quency. Each crossover card has two faces: one face operates Full Range, the other has arrows to indicate the edge for selecting HP (high-pass) or LP (low-pass) operation. Orient the card with the desired operating edge, indicated by the arrow, toward the socket terminals inside the amplifier. Firmly, but carefully, plug the card into the socket.

High Pass


➝LP				➝
➝LP			HP

Low Pass


➝HP			LP➝

Full Range

FULL ↕

The crossover point can be altered by changing the resistor value. Use the following formula to select the appropriate resistor value to be placed on the XCard.

	3386	= R (in kΩ	) for .047∝ f cap	The actual formula is:
	fo	= R (in kΩ	) for .047∝ f cap


				R =	1
	7234 = R (in kΩ		) for .022∝ f cap	R =	2π foc
	7234 = R (in kΩ		) for .022∝ f cap		2π foc

fo

R1

Crossover Card

R2	Pass	R1
Low Pass
Full Range

FULL

R2

Where: R = Ω

fo = desired crossover frequency c = capacitor in farads

ex: .047 x 10-6for .047mf cap

– 12 –

Image 15

Rockford Fosgate PUNCH 4020 DSM manual U S I N G T H E Xcard

Contents

PUNCH 4020 DSM 4-CHANNEL AMPLIFIER INSTALLATION & OPERATIONPRACTICE SAFE SOUND G E T T I N G S T A R T ED TA B L E O F C O N T E N T SI N T R O D U C T I O N PU N C H 4020 AM P L I F I E RAC C E S S O R Y PA C K RO C K F O R D FO S G AT E AC C E S S O R I E S Energy Storage Capacitor PCH-C1Punch Link FG-LINK XCardDSM Discrete Surface Mount Technology TECHNICAL DESIGN FEATUREStransana MOSFET DevicesTOPAZ Tracking Operation Pre-AmplifierZone XCard Internal Crossover RTP Real Time ProtectionNOMAD NOn-MultiplyingAdvanced Decision PUNCH 4020 D E S I G N F E AT U R E S AMPLIFIER IN S TA L L AT I O N CO N S I D E R AT I O N S Engine Compartment Mounting MOUNTING LOCATIONTrunk Mounting Passenger Compartment MountingW I R I N G T H E S Y S T E M BATTERY AND CHARGINGPage U S I N G T H E XCARD Connect to remote turn-onlead of 4020 PO W E R CO N N E C T I O N SLess than Connect to B+ of battery Keep grounds as short as possible4-CHANNELSTEREO S A M P L E W I R I N G D I A G R A M S4-CHANNEL- STEREO FRONT MONO REAR LP XCard 2-CHANNEL- MONORear XCard Front XCardXCard 4-CHANNEL- STEREO/MONO FRONT STEREO REARFront XCard Rear XCardDiagnosis T R O U B L E S H O O T I N GSymptom RemedySpeaker Output DiagnosisSymptom RemedyEngine Noise on SymptomDiagnosis RemedyListening to Loudspeakers - Not Resistors About the Dynamic Power MeasurementsD Y N A M I C P O W E R M E A S U R E M E N T S MusicInformation Cubed What is an Amplifier?SP E C I F I C AT I O N S Tempe, AZ 85281 U.S.A W A R R A N T Y I N F O R M A T I O NReturn Authorization Number Ship toIn Canada, call Korbon Rockford FosgateRockford Corporation 546 South Rockford Drive Tempe, Arizona 85281 U.S.A In U.S.A