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Rockford Fosgate 125.2 - page 1
® ® car audio fanatics for punc h 2-Channel Amplifiers Operation & Installation trans• ana trans• ana trans• ana trans• ana ® ...
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Rockford Fosgate 125.2 - page 2
Dear Customer, Congratulations on your purchase of the world's finest brand of car audio amplifiers. At Rockford Fosgate we are fanatics about musical reproduction at its best, and we are pleased you chose our product. Through years of engineering expertise, hand craftsman- ship and critical testing procedures, we have created a wide range of ...
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Rockford Fosgate 125.2 - page 3
T ABLE OF C ONTENTS Introduction ................................................................................................ 1 Punch Amplifier Accessory Pack ................................................................... 1 Technical Design Features ............................................................................ 2 Design Featu ...
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Rockford Fosgate 125.2 - page 4
I NTRODUCTION Rockford engineers designed the Punch 55. 2 , 75. 2 , 125. 2 and 225. 2 amplifiers to withstand the rugged automotive environment while delivering superior sound quality in a flexible, reliable, and efficient package. TRANS•ANA is a low voltage circuit in the preamp stage of all Punch . 2 amplifiers that lets the music sound crystal ...
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Rockford Fosgate 125.2 - page 5
T ECHNICAL D ESIGN F EA TURES – 2 – ◆ T RANS•ANA ( TRANSconductance Active Nodal Amplifier) The TRANS•ANA ( TRANS conductance A ctive N odal A mplifier) is a circuit that allows the audio signal to pass through the amplifier at low voltage. The signal is directly level-shifted to the fixed high voltage rails via a pair of driver transisto ...
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Rockford Fosgate 125.2 - page 6
◆ DSM (Discrete Surface Mount) Technology The DSM (Discrete Surface Mount) manufacturing process combines the advantages of both discrete components and integrated circuitry. Rockford Fosgate is the only American amplifier manufacturer to have invested millions into this process. DSM components differ from conventional discrete compo- nents in di ...
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Rockford Fosgate 125.2 - page 7
◆ MOSFET Devices Rockford Fosgate is one of the few manufacturers in the sound community to utilize MOSFET devices in both the power supply and the output stages . MOSFET ( M etal O xide S emiconductor F ield E ffect T ransistor) devices offer several important inherent advantages over the 30 year old technology of bi- polar design. These advanta ...
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Rockford Fosgate 125.2 - page 8
D ESIGN F EA TURES 1. Cast Aluminum Heatsink – The cast aluminum heatsink of the Punch amplifier dissipates heat generated by the amplifier's circuitry. The inherent advantage of casting provides a 30% improvement of cooling over conventional extrusion heatsink designs. 2. End Caps – The unique end caps conceal the wiring and input cables, ...
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Rockford Fosgate 125.2 - page 9
7. Input Sensitivity Controls – The input level controls are preset to match the output of most source units. They can be adjusted to match output levels from a variety of source units. 8. Punch Equalization Controls – The Punch EQ helps correct for acoustical deficiencies in the listening environment. The Bass control allows a narrow band adju ...
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Rockford Fosgate 125.2 - page 10
I NST ALLA TION C ONSIDERA TIONS The following is a list of tools you will need for installing the Punch amplifier: Allen wrenches 9/64" & 3/32" (included) Voltmeter Wire strippers Battery post wrench Electric hand drill w/assorted bits Wire cutters 17' (518.16cm) Red Power Wire Assorted connectors 12' (365.76cm) Remote Turn ...
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Rockford Fosgate 125.2 - page 11
M OUNTING L OCA TION The mounting location and position of your amplifier will have a great effect on its ability to dissipate the heat generated during normal operation. The design of our cast aluminum heatsink serves to easily dissipate the heat generated over a wide range of operating conditions. However, to maximize the performance of your ampl ...
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Rockford Fosgate 125.2 - page 12
B A TTERY AND C HARGING – 9 – Amplifiers will put an increased load on the vehicle's battery and charging system. We recommend checking your alternator and battery condition to ensure that the electrical system has enough capacity to handle the increased load of your stereo system. Stock electrical systems which are in good condition shoul ...
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Rockford Fosgate 125.2 - page 13
– 10 – Punch 55. 2 , 75. 2 , 125. 2 Trim the power cable to within 18" of the battery and install the protective rubber boot, which is packed with the fuseholder, over the end of the wire. Strip 3/8" of insulation from the wire and insert into the end of the fuseholder, then crimp it in place. Slide the rubber boot into place to cover ...
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Rockford Fosgate 125.2 - page 14
amplifier. Connect the other end of the REM wire to a switched 12 volt positive source. The switched signal is usually taken from the source unit's auto antenna or the accessory lead. If the source unit does not have these outputs available, the recommended solution is to wire a mechani- cal switch in line with a 12 volt source to activate the ...
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Rockford Fosgate 125.2 - page 15
U SING P ASSIVE C ROSSOVERS A passive crossover is a circuit that uses capacitors and/or coils and is placed on speaker leads between the amplifier and speaker. The crossover delegates a specific range of frequencies to the speaker for optimum driver performance. A crossover network can perform one of three functions: High-Pass (capaci- tors), Low- ...
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Rockford Fosgate 125.2 - page 16
T ABLE OF C ROSSOVER C OMPONENT V ALUES 6dB/Octave Low-Pass 6dB/Octave High-Pass Freq. Hertz Speaker Impedance 80 4.1mH 1000 µ F 8.2mH 500 µ F 16mH 250 µ F 100 3.1mH 800 µ F 6.2mH 400 µ F 12mH 200 µ F 130 2.4mH 600 µ F 4.7mH 300 µ F 10mH 150 µ F 200 1.6mH 400 µ F 3.3mH 200 µ F 6.8mH 100 µ F 260 1.2mH 300 µ F 2.4mH 150 µ F 4.7mH 75 µ ...
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Rockford Fosgate 125.2 - page 17
– 14 – 3386 f o = R (in k Ω ) for .047 µ f cap = R (in k Ω ) for .022 µ f cap 7234 f o Where: R = Ω f o = desired crossover frequency c = capacitor in farads ex: .047 x 10 -6 for .047 µ f cap Crossover Card High Pass Low Pass Full Range R1 R2 R1 R2 FULL The crossover point can be altered by changing all 4 resistor values. Use the follo ...
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Rockford Fosgate 125.2 - page 18
R ESISTOR C HART – 15 – Frequency R1 R2 20Hz 169k Ω 169k Ω 25Hz 133k Ω 133k Ω 30Hz 110k Ω 110k Ω 35Hz 95.3k Ω 95.3k Ω 40Hz 84.5k Ω 84.5k Ω 45Hz 75k Ω 75k Ω 50Hz 68.1k Ω 68.1k Ω 55Hz 61.9k Ω 61.9k Ω 60Hz 56.2k Ω 56.2k Ω 65Hz 52.3k Ω 52.3k Ω 70Hz 48.7k Ω 48.7k Ω 75Hz 45.3k Ω 45.3k Ω 80Hz 42.2k Ω 4 ...
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Rockford Fosgate 125.2 - page 19
– 16 – I NST ALLA TION *Keep grounds as short as possible Power Connections I N S T A L L A T I O N ® ® LED Connect to remote turn-on lead of source unit Connect to chassis ground of vehicle* Connect to B+ of battery with appropriate fuse value Less than 18" GND B+ P55 . 2 P75 .2 P125 .2 P225. 2 - 20A - 30A - 40A - 50A REM ...
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Rockford Fosgate 125.2 - page 20
– 17 – I N S T A L L A T I O N ® ® Stereo Operation Bass Right Gain Right Input Left Input Left Gain T reble – + +L– Speaker +R– Speaker – + RCA Input 2 Ω min. 2 Ω min. • RCA inputs are connected to both left and right channels • Gain for left and right channels operate independently • Impedance for each channel should be 2 ...
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Rockford Fosgate 125.2 - page 21
– 18 – I N S T A L L A T I O N ® ® Bass Right Gain Right Input Left Input Left Gain T reble +– +L– Speaker +R– Speaker RCA Input 4 Ω min. Mono Operation • RCA inputs are connected to both left and right channels • Gain for left and right channels are set equally to balance the subwoofer • Impedance for mono channel should be 4 ? ...
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Rockford Fosgate 125.2 - page 22
– 19 – I N S T A L L A T I O N ® ® • RCA inputs are connected to both left and right channels • Gain for left and right channels are set equally to balance the subwoofer • Impedance for each channel should be 2 Ω minimum • Impedance for mono channel should be 4 Ω minimum • XCard is set for Full Range • Passive Crossovers are n ...
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Rockford Fosgate 125.2 - page 23
– 20 – S YSTEM D IAGRAMS 2-Way System Crossover T weeter Midrange 80Hz HP XCard 12dB/octave HP 80Hz Crossover T weeter Midrange AUD SEL 1 2 3 4 5 6 RDM RPT SCAN PAUSE D.SCN DIM AM FM Ch RPT LD RDM DISC ST P.SCN LOUD DSPL R CLOCK ILLUM PWR AUTO ® ® VOL TUNE ...
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Rockford Fosgate 125.2 - page 24
– 21 – 3-Way System Crossover T weeter Midrange 8 Ω W oofer 8 Ω W oofer Front Rear 80Hz LP XCard 80Hz HP XCard 12dB/octave HP 80Hz 12dB/octave LP 80Hz Crossover T weeter Midrange AUD SEL 1 2 3 4 5 6 RDM RPT SCAN PAUSE D.SCN DIM AM FM Ch RPT LD RDM DISC ST P.SCN LOUD DSPL R CLOCK ILLUM PWR AUTO ® ® VOL TUNE ...
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Rockford Fosgate 125.2 - page 25
– 22 – 4-Way System Crossover T weeter Midrange Crossover T weeter Midrange Front W oofer 8 Ω 80Hz HP 24dB/octave HP 80Hz 24dB/octave HP 12dB/octave LP 275Hz 30Hz 12dB/octave HP 12dB/octave LP 80Hz Midbass 4 Ω 80Hz HP 12dB/octave HP 80Hz HP 24dB/octave HP 30Hz 12dB/octave HP 80Hz HP XCard 275Hz LP XCard 80Hz LP XCard 3 ® ® AUD SEL 1 2 3 4 ...
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Rockford Fosgate 125.2 - page 26
4-Way System w/Fadable Rear Stage – 23 – Crossover T weeter Midrange Crossover T weeter Midrange 80Hz HP XCard 275Hz LP XCard Front W oofer 8 Ω 80Hz LP XCard 80Hz HP 24dB/octave HP 80Hz 24dB/octave HP 12dB/octave LP 275Hz 30Hz 12dB/octave HP 12dB/octave LP 80Hz Midbass 4 Ω 80Hz HP 12dB/octave HP 80Hz HP 24dB/octave HP 30Hz 12dB/octave HP Cr ...
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Rockford Fosgate 125.2 - page 27
Energy Storage Capacitors Energy storage capacitors are used to provide extra current needed by amplifiers to reproduce musical transients. The capacitors also have the natural ability to filter AC ripple caused by the alternator, reducing the chance of noise in the system. The Punch Caps are available in a variety of values and will maximize both ...
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Rockford Fosgate 125.2 - page 28
XCard Crossovers Additional crossover card frequencies are available for specialized require- ments. You can get the following XCards from your Authorized Rockford Fosgate Dealer. ® – 25 – XM50 = 50Hz XM200 = 200Hz XM70 = 70Hz XM275 = 275Hz XM80 = 80Hz XM400 = 400Hz XM100 = 100Hz XM4.5k = 4,500Hz XM150 = 150Hz XM6.5k = 6,500Hz XM00 = Blank car ...
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Rockford Fosgate 125.2 - page 29
– 26 – T ROUBLESHOOTING Amplifier does not turn on (Power LED is off) Symptom Diagnosis Remedy Voltage applied to the REM terminal of the amplifier is not between 10.5 and 15.5 volts or there is no voltage present. Voltage to the B+ terminal of the amplifier is not be- tween 10.5 and 15.5 volts or there is no voltage present. Amplifier is not p ...
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Rockford Fosgate 125.2 - page 30
– 27 – Speaker Output Low or Distorted Readjust input gains of amplifier. Check system with known work- ing source and repair or replace original source as needed. Check XCard position and repair or replace as necessary. Check the alternator, battery, fuse, and power and ground wiring. Repair as necessary. Symptom Diagnosis Remedy Input gain si ...
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Rockford Fosgate 125.2 - page 31
– 28 – Noise is radiating into RCA signal cable. Bad component in the sig- nal chain. Noise is radiating into speaker cables. Multiple grounds in the audio system. Ground loop between source unit and antenna. Engine Noise Symptom Diagnosis Remedy Check connections, run the RCA cables on a different route away from sources of high current. Check ...
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Rockford Fosgate 125.2 - page 32
– 29 – D YNAMIC P OWER M EASUREMENTS About the Dynamic Power Measurements The Audio Graph PowerCube is a test instrument used to measure the output of an amplifier in accordance with IHF-202 industry standards. The IHF-202 standard is a dynamic power measurement and was developed as a means of measuring power in a manner that best represents th ...
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Rockford Fosgate 125.2 - page 33
Information Cubed The data acquired in the testing procedure is then graphed in the form of 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 is displayed on the Z axis. Output Power, in watts, is listed on the left hand side f ...
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Rockford Fosgate 125.2 - page 34
– 31 – PUNCH 55. 2 PUNCH 75.2 PUNCH 125. 2 PUNCH 225. 2 Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4 Volts Mono into a 4 Ω Load 240 Watts 320 Watts 440 Watts 690 Watts Per channel into a 2 Ω Load 120 Watts 160 Watts 220 Watts 345 Watts Per channel into a 4 Ω Load 85 Watts 105 Watts 145 Watts 220 Watts Continuous Power Rating ...
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Rockford Fosgate 125.2 - page 35
PUNCH 55. 2 PUNCH 75. 2 PUNCH 125. 2 PUNCH 225. 2 Dimensions 9 5 / 8 " (24.4cm) W 9 5 / 8 " (24.4cm) W 9 5 / 8 " (24.4cm) W 9 5 / 8 " (24.4cm) W 10 9 ⁄ 32 " (26.1cm) L 11 9 ⁄ 32 " (28.65cm) L 12 9 ⁄ 32 " (31.16cm) L 13 9 ⁄ 32 " (33.70cm) L 2 5 / 8 " (6.6cm) H 2 5 / 8 " ( 6.6cm) H 2 5 / 8 &qu ...
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Rockford Fosgate 125.2 - page 36
L IMITED W ARRANTY I NFORMA TION – 33 – Ship to: Speakers Rockford Acoustic Design (Receiving-speakers) 609 Myrtle N.W. Grand Rapids, MI 49504 RA#:_________________ Ship to: Electronics Rockford Corporation Warranty Repair Department 2055 E. 5th Street Tempe, AZ 85281 RA#:_________________ Rockford Corporation offers a limited warranty on Rockf ...
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Rockford Fosgate 125.2 - page 37
I NTERNA TIONAL I NFORMA TION – 34 – ...
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Rockford Fosgate 125.2 - page 38
LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DE INSTALACION DEL PRODUCTO. EVITARA POSIBLES DAÑOS A VD., AL VEHICULO O AL PRODUCTO. Montaje en el Malatero Monte el amplificador verticalmente con las lineas del radiador orientadas de arriba hacia abajo. De esta manera conseguira la mejor ventilacion. Montaje en el Compartimento de Pasajeros El mon ...
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Rockford Fosgate 125.2 - page 39
Bass Right Gain Right Input Left Input Left Gain T reble +L– Speaker RCA Input +– 4 Ω min. – + – + +R– Speaker 2 Ω min. 2 Ω min. Funcionamiento Estereo/Mono • Las entradas RCA se conectan a ambos canales izquierdo y derecho • Las ganancias izquierda y derecha han de ajustarse igual para ambos canales • La impedancia minima par ...
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Rockford Fosgate 125.2 - page 40
ATTENTION: Veuillez lire les instructions suivantes pour l'installation de cet amplifcateur. Ne pas les suivre pourrait causer des blessures ou endommager le véhicule. Les ingénieurs de Rockford Fosgate ont conçu l'amplificateur Punch. 2 pour supporter l'environnement rude de l'automobile en délivrant une qualité de son sup ...
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Rockford Fosgate 125.2 - page 41
Terminal GND Préparez une longueur de câble pour la connexion à la masse. Préparez le châssis en grattant la peinture de la surface métallique et nettoyez la saleté et l'huile. Attachez le câble au châssis avec une vis. Terminal REM Connectez le fil REM à une commande 12 volts positive de la source. La commande 12 volts est habituell ...
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Rockford Fosgate 125.2 - page 42
BITTE LESEN SIE DIESE GEBRAUCHSANLEITUNG ZUERST SORGFÄLTIG DURCH. DAS KANN SIE VOR DEM FALSCHEN EINSATZ, AUSFALLEN ODER SOGAR BESCHÄDIGUNG DES PRODUKTES ODER IHRES FAHRZEUGES SCHÜTZEN. Im Fahrzeugkofferraum Der vertikale Einbau der Endstufen, das bedeutet, dab die Kühlrippen von oben nach unten verlaufen, gibt dem Verstärker die beste Kühlung ...
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Rockford Fosgate 125.2 - page 43
GND Anschlu β Preparieren Sie Ihr Kabel für die Negativ Leitung (Erdung). Preparieren Sie die Anschlubstelle des Erdungskabels, indem Sie das Metall gründlich reinigen und vom Lack befreien. Befestigen Sie nun die Erdung an dieser Stelle mit einer Schraube. REM Anschlu β Verbinden Sie das Ein-und Ausschaltungskontroll-Kabel mit Ihrem Radio (12 ...
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Rockford Fosgate 125.2 - page 44
ATTENZIONE: SI PREGA DI LEGGERE LE SEGUENTI ISTRUZIONI PER L'INSTALLAZIONE DI QUESTO PRODOTTO. IL NON SEGUIRLE POTREBBE RISULTARE SERIAMENTE DANNOSO PER LA PERSONA O PER IL VEICOLO. Gli ingenieri Rockford hanno progettato la serie di amplificatori Punch. 2 per resistere all'ostico ambiente automobilistico mentre suonano con una musicalit? ...
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Rockford Fosgate 125.2 - page 45
Terminale GND (cavo negativo) Decidere la lunghezza del cavo e terminarlo. Preparare la massa grattando la vernice dal telaio dell'auto ed eliminando tracce di olio o sporco. Fissare il cavo di massa al telaio con una vite. Terminale REM (Consenso di accensione) Collegare il cavo REM ad un positivo presente solo ad autoradio accesa (normalment ...
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Rockford Fosgate 125.2 - page 46
N OTES ...
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Rockford Fosgate 125.2 - page 47
N OTES ...
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Rockford Fosgate 125.2 - page 48
10/97 MAN-1849-A MADE IN THE USA This product is designed, developed and assembled in the USA by a dedicated group of American workers. The majority of the components used in the construction of this product are produced by American companies. However, due to the global nature of their manufacturing facilities and the loudspeaker parts industry in ...
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