Rockford Fosgate PUNCH 4020 DSM - Manuals

– 3 – T E C H N I C A L D E S I G N F E AT U R E S ◆ trans• ana The trans• ana (TRANS conductance Advanced Non-multiplying Amplifier) is a novel circuit that utilizes a short-loop complemen-tary topology and advanced Real Time Protection circuitry. THE RESULT: An amplifier design with the benefits o...

– 4 – to be obtained in amplifiers of desirable package size withoutresorting to “amplifier-on-a-chip” shortcuts. These advantagesare shown below in Figure 1. THE RESULT: Less connections, improved reliability, shortersignal paths, superior signal-to-noise ratio and awesome sonicperformance. Figure ...

– 5 – ◆ XCard (Internal Crossover) The Punch 4020 amplifier utilizes internal active crossovers. Thesecrossovers have many performance advantages such as using dis-crete components for exact frequency adjustments which are farsuperior to potentiometers. Additionally, the XCard can be config- ured fo...

P U N C H 4020 D E S I G N F E A T U R E S 1. Cast Aluminum Heatsink – The cast aluminum heatsink of the Punch amplifier dissipates heat generated by the amplifier'scircuitry. The inherent advantage of casting provides a 30%improvement of cooling over conventional extrusion heatsinkdesigns. 2. End C...

M O U N T I N G L O C AT I O N The mounting location and position of your amplifier will have a greateffect on its ability to dissipate the heat generated under normaloperation. The design of our cast aluminum heatsink serves to easilydissipate the heat generated over a wide range of operating condi...

Amplifiers will put an increased load on the vehicle's battery andcharging system. We recommend checking your alternator andbattery condition to ensure that the electrical system has enoughcapacity to handle the increased load of your stereo system. Stockelectrical systems which are in good conditio...

– 12 – U S I N G T H E XC ARD The crossover functions are controlled through the use of anXCard and can be set for high-pass, low-pass or full rangeoperation. These cards are shipped in the most common fre-quency. Each crossover card has two faces: one face operates FullRange, the other has arrows t...

S A M P L E W I R I N G D I A G R A M S – 14 – 4-CHANNEL STEREO + – 2 Ω Minimum High Frequency + – 2 Ω Minimum Low Frequency + – Front Gain Front Rear Rear Gain (Bridged Mono) + L – + R – (Bridged Mono) Front Speakers Rear Speakers + – – L + – R + R L R L Front Rear • Signal input switch to 4 channe...

– 17 – 4-CHANNEL – STEREO/MONO FRONT STEREO REAR + – 4 Ω Minimum Low Frequency + – 2 Ω Minimum High Frequency + – 2 Ω Minimum High Frequency – + Front Gain Front Rear Rear Gain (Bridged Mono) + L – + R – (Bridged Mono) Front Speakers Rear Speakers + – – L + – R + R L R L Front Rear 2 Ω Minimum High ...

T R O U B L E S H O O T I N G – 18 – Amplifier does notturn on.(Power LED is off) Symptom Diagnosis Remedy Voltage applied to theREM terminal of theamplifier is not between10.5 and 15.5 volts ort h e r e i s n o v o l t a g epresent. Voltage to the B+ termi-nal of the amplifier isnot between 10.5 an...

– 20 – Engine Noise onthe Speaker Out-puts of the Ampli-fier Disconnect existing speak-ers and test with knownworking speakers. If enginenoise is gone, check andrepair wiring and installa-tion of speakers as neces-sary. Check connections, substi-tute with known workingcables and repair or replaceas ...

– 21 – D Y N A M I C P O W E R M E A S U R E M E N T S About the Dynamic Power MeasurementsThe Audio Graph PowerCube is a test instrument used to measure theoutput of an amplifier in accordance with IHF-202 industry stan-dards. The IHF-202 standard is a dynamic power measurement andwas developed as ...

Information CubedThe data acquired in the testing procedure is then graphed in the formof a 3-dimensional cube. Hence the name PowerCube. The Phase Angle is expressed on the horizontal axis, the Output Voltage is presented on the vertical axis and the Impedance isdisplayed on the Z axis. Output Powe...

– 23 – S P E C I F I C A T I O N S Continuous Power Rating (Competition Standard) - Measured at 13.8VRMS continuous power per channel, all channels 20 Watts driven into a 4 Ω load from 20-20,000Hz with less than 0.05% Total Harmonic Distortion (THD) RMS continuous power per channel, all channels 30 ...

Rockford Fosgate Rockford Corporation 546 South Rockford Drive Tempe, Arizona 85281 U.S.A. In U.S.A., (602) 967-3565 In Canada, call Korbon (905) 567-1929 In Europe, Fax (49) 4207-801250 In Japan, Fax (81) 559-79-1265 10/94MAN-0808-A