Rockford Fosgate 40X2 manual Resistor Chart, Butterworth Alignment Q =

Page 16

RESISTOR CHART

Use the resistor charts below to modify the factory shipped 100Hz XCard.

AO

DP

VE

AR

A N T C I E O

D N

Butterworth Alignment Q = .707

1% resistors used with 0.047∝ F caps

	Frequency	R1		R2
	Frequency	R1		R2
	20Hz	169kΩ		169kΩ
	25Hz	133kΩ		133kΩ
	30Hz	110kΩ		110kΩ
	35Hz	95.3kΩ		95.3Ω
	40Hz	84.5kΩ		84.5kΩ
	45Hz	75kΩ		75kΩ
	50Hz	68.1kΩ		68.1kΩ
	55Hz	61.9kΩ		61.9kΩ

	60Hz	56.2kΩ		56.2kΩ
	65Hz	52.3kΩ		52.3kΩ
	70Hz	48.7kΩ		48.7kΩ

	75Hz	45.3kΩ		45.3kΩ
	80Hz	42.2kΩ		42.2kΩ
	84Hz	40.2kΩ		40.2kΩ

	90Hz	37.4kΩ		37.4kΩ
	200Hz	16.9kΩ		16.9kΩ
	300Hz	11.3kΩ		11.3kΩ

	400Hz	8.45kΩ		8.45kΩ
	500Hz	6.65kΩ		6.65kΩ
	600Hz	5.62kΩ		5.62kΩ
	700Hz	4.75kΩ		4.75kΩ
	800Hz	4.22kΩ		4.22kΩ

	900Hz	3.74kΩ		3.74kΩ
	1kHz	3.40kΩ		3.40kΩ
	1.2kHz	2.80kΩ		2.80kΩ

	2kHz	1.69kΩ		1.69kΩ
	3kHz	1.10kΩ		1.10kΩ
	4kHz	845Ω		845Ω

	5kHz	665Ω		665Ω
	6kHz	562Ω		562Ω
	7kHz	487Ω		487Ω
	8kHz	422Ω		422Ω

Butterworth Alignment Q = .707

5% resistors used with 0.047∝ F caps

	Frequency	R1	R2
	Frequency	R1	R2
	21Hz	160kΩ	160kΩ
	26Hz	130kΩ	130kΩ
	30.8Hz	110kΩ	110kΩ
	37Hz	91kΩ	91Ω
	41Hz	82kΩ	82kΩ
	45Hz	75kΩ	75kΩ
	49.8Hz	68kΩ	68kΩ
	54.6Hz	62kΩ	62kΩ
	60.5Hz	56kΩ	56kΩ
	66.4Hz	51kΩ	51kΩ
	72Hz	47kΩ	47kΩ
	N/A	N/A	N/A
	78.7Hz	43kΩ	43kΩ
	86.8Hz	39kΩ	39kΩ

	94Hz	36kΩ	36kΩ
	212Hz	16kΩ	16kΩ
	308Hz	11kΩ	11kΩ

	413Hz	8.2kΩ	8.2kΩ
	498Hz	6.8kΩ	6.8kΩ
	605Hz	5.6kΩ	5.6kΩ
	720Hz	4.7kΩ	4.7kΩ
	787Hz	4.3kΩ	4.3kΩ
	940Hz	3.6kΩ	3.6kΩ
	1kHz	3.3kΩ	3.3kΩ
	1.2kHz	2.7kΩ	2.7kΩ
	2.1kHz	1.6kΩ	1.6kΩ
	3kHz	1.1kΩ	1.1kΩ
	4.1kHz	820Ω	820Ω

	5kHz	680Ω	680Ω
	6kHz	560Ω	560Ω
	7.2kHz	470Ω	470Ω
	7.9kHz	430Ω	430Ω

– 13 –

Image 16

Contents Channel Amplifiers Operation & Installation Practice Safe Sound B L E O F C O N T E N T S T T I N G S T a R T E DPunch Amplifier Accessory Pack T R O D U C T I O NTechnical Design Features TransanaDSM Discrete Surface Mount Technology Mosfet Devices Design Features Front XCard S TA L L AT I O N CO N S I D E R AT I O N S Mounting Location Trunk MountingPassenger Compartment Mounting Engine Compartment MountingBattery and Charging R I N G T H E S Y S T E MPunch 40x2, 60x2 PunchPage I N G T H E Xcard 3386Actual formula is = R in kΩ For .047∝ f capButterworth Alignment Q = Resistor ChartResistors used with 0.047∝ F caps Frequency Installation Power ConnectionsStereo Operation Mono Operation Stereo/Mono Operation SY S T E M DI a G R a M S Way System Front Way System w/Fadable Rear Stage PCH-14XPunch Status Display FG-PSD RO C K F O R D FO S G AT E AC C E S S O R I E SEnergy Storage Capacitors Punch Link FG-LINK XCard Crossovers Symptom TroubleshootingRemedy Symptom Diagnosis Remedy Speaker OutputLow or Distorted Amplifier NoiseEngine Noise About the Dynamic Power Measurements N a M I C P O W E R M E a S U R E M E N T SMusic Listening to Loudspeakers Not ResistorsWhat is an Amplifier? Information CubedPUNCH200x PUNCH100xPUNCH60x PUNCH40xAtcatcatcagu R R a N T Y I N F O R M a T I O N Page Montaje en el Malatero Montaje en el Compartimento de PasajerosInstalacion Terminal B+Terminal GND Terminal REMFuncionamiento Estereo/Mono No llevar a masa ningun cable de altavozMontage dans le coffre InstallationMontage dans lhabitacle Opération stéréo/mono tri mode Im Fahrzeugkofferraum Auf der BeifahrerseiteEinbau + AnschlussGND Anschluss REM AnschlussInstallazione Nel BagagliaioNellabitacolo Terminale B+ cavo positivoTerminale GND cavo negativo Terminale REM Consenso di accensioneT E S T E S Made in the USA Rockford Fosgate