250.1 power ® 250.
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 craftsmanship and critical testing procedures, we have created a wide range of products that reproduce music with all the clarity and richness you deserve.
T ABLE OF C ONTENTS Introduction ................................................................................................................................................................. 1 Punch Accessory Pack ................................................................................................................................................. 1 Technical Design Features .....................................................................................................................
INTRODUCTION TO 250 SERIES The “250 Series” Power amplifiers represent the best Rockford Fosgate has to offer! Our engineers devised technical features which would be considered overkill by other audio manufacturers, but not at Rockford Fosgate! Trans•nova, DIAMOND and TOPAZ, exclusively designed by Rockford, are just a few of these features which are described in the Technical Design Features section of this manual. The 250.
T ECHNICAL D ESIGN F EATURES Many of the solutions to common design problems encountered by Rockford Fosgate engineers created entire new circuit designs as well as new ways to construct the Punch 250.2 and 250.1 Power Amplifiers. In our flagship amplifiers, no expense was spared in design and construction from the unique circuitry design to the manufacturing process that has proven to be the industry reference for many years.
◆ 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 components in different ways. They are more compact, more rugged, and they efficiently dissipate generated heat.
◆ Balanced Line Inputs (250.2) Using the Balanced Line Inputs provides the last word in achievable rejection of noise induced in the cable between the source and the amplifier. The differential input circuitry (Figure 2) used in the balanced input system rejects whatever signals are common to both of the shielded, twisted-pair conductors. Balanced line is universal in concert installations where the stage and mixing consoles are hundreds of feet apart.
250.2 D E S I G N F E AT U R E S 1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power 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, giving the amplifier a clean “stealth” look. 3 13 8 Unbal. Speaker + L – 0°-180° 6 L (Mono) 7 Gain 10 3 R Bal.
10. 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. 11. Internal Crossovers – These built-in crossover cards are configurable for a multitude of operating frequencies. The orientation of the card in its socket determines its function of high-pass, low-pass or full range operation. 12.
250.1 D ESIGN F EATURES 1. Cast Aluminum Chrome Heatsink – The cast aluminum heatsink of the Punch Power 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, giving the amplifier a clean “stealth” look.
10. Internal Crossover – This built-in crossover card is configurable for a multitude of operating frequencies. The orientation of the card in its socket determines the function of high-pass, low-pass or full range operation. 11. Phase Switch – This switch enables you to easily invert the phase without having to disconnect the speaker wires. 12. Crossover Switch – This multi-function switch enables you to select a 12dB per octave slope or 24dB per octave slope for the internal crossover.
I NSTALLATION C ONSIDERATIONS Tools Needed The following is a list of tools you will need for installing the “250 Series” Power amplifiers: Allen wrenches 9/64" & 3/32" (included) Wire strippers Battery post wrench Electric hand drill and assorted bits Wire Cutters Voltmeter Wire crimpers Assorted connectors This section focuses on some of the vehicle considerations for installing your new Punch amplifier.
MOUNTING LOCATION S The mounting location and position of your amplifier will have a great effect on its ability to dissipate the heat generated under 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 amplifier, care should be taken to ensure adequate ventilation.
W IRING T HE S YSTEM CAUTION: Avoid running power wires near the low level input cables, antenna, power leads, sensitive equipment or harnesses. The power wires carry substantial current and could induce noise into the audio system. 1. Configure the internal XCard crossovers prior to installation. Refer to the “Using the Signal Switching Network” (page 19 for the 250.2 and page 31 for 250.1) for further information. 2. Plan the wire routing.
10. Perform a final check of the completed system wiring to ensure that all connections are accurate. Check all power and ground connections for frayed wires and loose connections which could cause problems from road vibrations. 11. After the final inspection is complete, install the power fuse and enjoy listening. During the initial listening period, you may need to “fine tune” any phasing and level settings within your particular vehicle.
TABLE OF CROSSOVER COMPONENT VALUES a d v a n c e d C L 6dB/Octave High-Pass 6dB/Octave Low-Pass Speaker Impedance Freq. Hertz 2 OHMS 8 OHMS 4 OHMS L C L 80 100 130 4.1mH 3.1mH 2.4mH 1000µF 800µF 600µF 8.2mH 6.2mH 4.7mH 200 260 400 1.6mH 1.2mH .8mH 400µF 300µF 200µF 600 800 1000 .5mH .41mH .31mH 1200 1800 4000 6000 9000 12000 C L C 500µF 400µF 300µF 16mH 12mH 10mH 250µF 200µF 150µF 3.3mH 2.4mH 1.6mH 200µF 150µF 100µF 6.8mH 4.7mH 3.3mH 100µF 75µF 50µF 136µF 100µF 78µF 1.
USING THE XC ARD The crossover functions are controlled through the use of an XCard and can be set for high-pass, low-pass or full range operation. The XCard shipped with your amplifier is set for Full Range. 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.
XC ARD R ESISTOR C HART a d v a n c e d Our tests have shown that using 0.047µf capacitors for frequencies below 100Hz, and 0.022mf capacitors for frequencies above 100Hz, result in more linear crossover control. Refer to the Specifications page to determine the capacitor value of each supplied XCard. Butterworth Alignment Q = .707 1% resistors used with 0.047mF capacitors Butterworth Alignment Q = .707 1% resistors used with 0.
250.2 INSTALLATION ® 250.2 Power Connections (Option #1) Power REM Dual B+ Dual GND Connect to remote turn-on lead of source unit. Connect to chassis ground of vehicle* Less than 18" + – Connect to B+ of battery with a 60 amp fuse. *Keep wire as short as possible. 250.2 Power Connections (Option #2) Power Dual B+ Dual GND Connect to remote turn-on lead of source unit. Less than 18" + – Connect to B+ of battery with a 60 amp fuse. *Keep wire as short as possible.
® Stereo Operation RCA Input Unbal. Speaker + L – 0°-180° L (Mono) R Bal. Pass Thru Gain Bal. Input L EZ-180°-0° Bridged R Gain – – 2Ω Min. 2Ω Min.
® Bridged Operation RCA Input Unbal. Speaker + L – 0°-180° L (Mono) R Bal. Gain + Speaker Terminal EZ-180°-0° Bridged Bal. Input Pass Thru L R Speaker – R + Gain + – Speaker Terminal – 4Ω min.
U S I N G T H E 250.2 SIGNAL S W I T C H I N G N E T W O R K ® ® I N S T A L L A T I O N The Punch 250.2 Power amplifier has a crossover switching network which enables you to: • • • • • “Audiophile Bypass” the 250.2 and Pass-Thru Configure a 12dB per octave filter for both 250.2 and Pass-Thru “Audiophile Bypass” the 250.2 and configure a 12dB per octave filter for the Pass-Thru Configure a 24dB per octave filter for the 250.
® “Audiophile Bypass” as it affects the output of the 250.2 and Pass-Thru. XCard not required. R AUD VOL PWR CLOCK DISC AMFM ® ST Ch LD RDM RPT AUTO DSPL SEL ILLUM P.SCN LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE XCard 1 XCard 2 ® Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal. Input L R EZ-180°-0 ° Bridged Speaker – R + Gain + + – Full Range 20Hz – Full Range 20kHz + – 20Hz 20kHz 12dB/Octave Low-Pass 20Hz 80Hz 20kHz • 250.
® Configure a 12dB per octave filter for both the 250.2 and Pass-Thru. 250x22 XCard* Pass Thru XCard* HP XCard 1 R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT LP XCard 2 SEL CLOCK AUTO ILLUM DSPL P.SCN LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® Unbal. Speaker + L – 0°-180° L (Mono) R Bal. Gain Pass Thru Bal.
® “Audiophile Bypass” the 250.2 and configure a 12dB per octave filter for the Pass-Thru. Pass Thru XCard XCard not required. LP R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT CLOCK AUTO DSPL P.SCN SEL ILLUM LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE XCard 1 XCard 2 ® Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal.
– 23 – – + ST ® Ch LD RDM RPT 2 1 AUTO 3 RPT P.SCN Speaker + L – SCAN DSPL CLOCK D.SCN ILLUM LOUD 5 DIM SEL XCard 1 XCard 2 HP HP 20Hz 250x 2 2 XCard* Gain R + R Full Range L L (Mono) R Pass Thru TUNE Bal. Unbal. 6 PAUSE 0°-180° 4 RDM 250x 2 2 XCard* 20kHz 24dB/Octave High-Pass ® DISC AMFM 20Hz PWR AUD *Note: Both XCard inserted as HP or LP. VOL 20kHz – Bal. Input – + VOL – + PWR AUD ST ® Ch LD RDM RPT 2 SCAN DSPL CLOCK AUTO 3 RPT P.
U SING THE 250.2 B ALANCED L INE I NPUTS The Balanced Line Inputs can be utilized with the optional Balanced Line Transmitter. Unlike standard RCA cables that use two wires to carry the audio signal and ground, balanced lines use three. In a balanced line, the output signal and its inverted replica travel down a pair of wires where the ground connects via the shield. As the amplifier receives the signals, it cancels out whatever signals are common to both wires.
Level Setting the BLT a d v a n c e d R AUD VOL PWR DISC AMFM ST ® Ch LD RDM RPT CLOCK AUTO ILLUM DSPL P.SCN LOUD SEL D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® 1kHz Test Tone @ “0dB” 8.0 VAC ® ® BALANCED LINE TRANSMITTER L + • • • • • • • • – R L R Disconnect Speaker(s) from the 250.
250.1 INSTALLATION ® 250.1 Power Connections (Option #1) REM Dual B+ Dual GND Connect to remote turn-on lead of source unit. Connect to chassis ground of vehicle* Less than 18" + – Connect to B+ of battery with a 60 amp fuse. *Keep ground connections as close to each other as possible. 250.1 Power Connections (Option #2) Dual B+ Dual GND Connect to remote turn-on lead of source unit. Less than 18" + 1 farad • 20 VDC • 95°C cap 1.
Mono Operation ® RCA Input L (Mono) R Power Speaker – + Gain L Pass Thru R Pass Thru – L + R / L (Mono) RCA Inputs + 2Ω minimum • Signal Input Switch set to L+R for RCA input • Phase Switch set to 0° • Impedance should be 2Ω minimum • XCard can be set for High-Pass, Low-Pass or Full Range X-Over 0°-180° 24dB/12dB/0dB – 27 – ® I N S T A L L A T I O N
• • • • + – Gain L Pass Thru R Pass Thru L (Mono) R X-Over 0°-180° 24dB/12dB/0dB L + R / L (Mono) RCA Inputs Power Signal Input Switch (250.1 #1 / #2) set to L(Mono) for single RCA input) Phase Switch (250.1 #1/2) set to 0° Impedance for each amplifier should be 2Ω minimum XCard for each amplifier can be set for High-Pass, Low-Pass or Full Range 2Ω minimum Speaker – + 250.1 #1 L RCA Input R Stereo Operation using two Punch 250.1 Power Amplifiers 2Ω minimum + – 250.
– 29 – Passive Crossovers are needed for proper stereo/mono operation • Impedance for each stereo channel should be 2Ω minimum • Impedance for bridged channel should be 4Ω minimum Gain (250.1 #1/#2) set equally to balance the subwoofer • XCard (250.1 #1/#2) set to Full Range All speaker polarity on right amplifier is inverted to correct for signal phase • Phase Switch (250.1 #2) set to 180° • • • Phase Switch (250.
Gain Phase Switch (250.1 #1) set to 0° Phase Switch (250.1 #2) set to 180° Gain (250.1#1/#2) set equally to balance the subwoofer Impedance for bridged channel should be 4Ω minimum XCard (250.1 #1/#2) set identically as High-Pass, Low-Pass or Full Range • • • • – • 4Ω minimum + X-Over 0°-180° 24dB/12dB/0dB L + R / L (Mono) RCA Inputs Power Signal Input Switch (250.1 #2) set to L+R for RCA input L Pass Thru R Pass Thru L (Mono) R • + Speaker Terminal Speaker – + 250.
USING THE 250.1 SIGNAL S W I T C H I N G N E T W O R K “Audiophile Bypass” the 250.1 XCard not required. R AUD VOL PWR DISC AMFM ST ® Ch LD RDM RPT CLOCK AUTO ILLUM DSPL P.SCN LOUD SEL D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE XCard ® L (Mono) R Power Speaker – + X-Over 0°-180° 24dB/12dB/0dB Gain L Pass Thru R Pass Thru L + R / L (Mono) RCA Inputs – + Full Range Full Range 20Hz 20kHz + 20Hz – 20kHz • Xover is set to 0dB • The 250.
® Configure a 12dB per octave filter for the 250.1 LP R AUD VOL PWR DISC AMFM ST ® Ch LD RDM RPT CLOCK AUTO DSPL P.SCN SEL ILLUM LOUD D.
Configure a 24dB per octave filter for the 250.1 ® LP R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT SEL CLOCK AUTO ILLUM DSPL P.SCN LOUD D.
S YSTEM D IAGRAMS 250 Watt System (rated @ 4 ohms) Total Power Delivery (RMS) Tweeters 450 Watts Midrange 450 Watts R AUD VOL PWR DISC AMFM ® 80Hz HP ST Ch LD RDM RPT CLOCK AUTO DSPL P.SCN SEL ILLUM LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® 80Hz HP 250.
500 Watt System (rated @ 4 ohms) Total Power Delivery (RMS) Tweeters 450 Watts Midrange 450 Watts Woofers 500 Watts R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT SEL CLOCK AUTO ILLUM DSPL P.SCN LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® Pass-Thru Pass-Thru 80Hz HP 80Hz LP 250.
750 Watt System (rated @ 4 ohms) Total Power Delivery (RMS) Tweeters 450 Watts Midrange 450 Watts Midbass 250 Watts Woofers 500 Watts R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT CLOCK AUTO DSPL P.SCN SEL ILLUM LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® Pass-Thru Pass-Thru 400Hz HP 400Hz LP 250.
1000 Watt System (rated @ 4 ohms) Total Power Delivery (RMS) Tweeters 450 Watts Midrange 450 Watts Midbass 250 Watts Woofers 1000 Watts R AUD VOL PWR DISC AMFM ® ST Ch LD RDM RPT SEL CLOCK AUTO ILLUM DSPL P.SCN LOUD D.SCN SCAN RPT RDM DIM PAUSE 1 2 3 4 5 6 TUNE ® Pass-Thru Pass-Thru 400Hz HP 400Hz LP 250.
ROCKFORD FOSGATE ACCESSORIES Balanced Line Transmitter (FG-BLT) ® The Balanced Line Transmitter converts signal RCA cables from the source unit to balanced signals. The BLT improves sound quality in the system by eliminating noises generated by vehicle electrical systems. The BLT is available for Rockford Fosgate products that offer a balanced input. R AUD VOL DISC AMFM PWR ST Ch LD RDM RPT ® CLOCK AUTO ILLUM DSPL P.SCN LOUD SEL D.
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 capacitors are available in a variety of values and will maximize both the sound quality and performance that Rockford Fosgate amplifiers can deliver. Power REM Dual B+ Dual GND Battery + ® ® the connecting ® 1.
TROUBLESHOOTING Symptom Amplifier does not turn on. (Power LED is off) Amplifier has no sound. (Power LED is on) TROUBLE-S H O O T I N G 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. Check the alternator, battery, fuse, and wiring and repair as necessary. If the voltage is above 15.5 volts, have the electrical system inspected by an authorized car service center.
Symptom Speaker Output Low or Distorted Amplifier Noise (Turn-on Pop) No output from Pass-Thru output of amplifier. Diagnosis Remedy TROUBLE-S H O O T I N G Input gain(s) for amplifier incorrectly set. Readjust input gains of amplifier. Source unit output too low or source unit has no output. Check system with known working source and repair or replace original source as needed. Phase selection of amplifier incorrectly selected or speakers wired out of polarity from the left to right channel.
Symptom Low or distorted output from the Pass-Thru output of the amplifier. Diagnosis Remedy TROUBLE-S H O O T I N G Input gain(s) for amplifier incorrectly set. Readjust input gains of amplifier. Source unit output too low. Check system with known working source and repair or replace original source as needed. XCards are missing or not placed properly in crossover slots and/or switches are not properly selected. Check crossover switches and XCard positions and repair or replace as necessary.
AUTOSOUND 2000's QUICK CHECK FOR TROUBLESHOOTING CAR AUDIO SYSTEMS Preface: All audio systems exhibit noise; however, if the level of noise is low enough, and the signal level high enough, noise should not be a problem. This means that it is very important that the signal level throughout the system be optimized BEFORE dealing with your noise problem.
III. MOVE THE DECK. If you're at this step, it's time to turn your system into an “amplified deck” by temporarily relocating the deck right ON TOP of the clean amplifier. Then using very, very short signal cables, connect the output of the deck into the input of the amp and test for noise. Play a zero bit track – silence – and make sure all is completely quiet. A. If still noisy, you're in a heap of trouble.
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 the Real World operation of an amplifier. Many manufacturers, including Rockford Fosgate, at times will measure amplifier power into a fixed resistor (4 ohm, 2 ohm).
250.2 S PECIFICATIONS Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4V Per channel into a 4Ω load Per channel into a 2Ω load Bridged into a 4Ω load 180 Watts 310 Watts 620 Watts Continuous Power Rating (Competition Standard) - Measured at 13.8 Battery Volts RMS continuous power per channel, both channels driven into a 4Ω load from 20 to 20,000Hz with less than 0.
250.1 S PECIFICATIONS Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4V Mono into a 4Ω load Mono into a 2Ω load Bridged (using 2 Punch 250m) into a 4Ω load 420 Watts 710 Watts 1420 Watts* Continuous Power Rating (Competition Standard) – Measured at 13.8 Volts RMS continuous power mono, into a 4Ω load from 20-20,000Hz with less than 0.10% THD 250 Watts RMS continuous power mono, into a 2Ω load from 20-20,000Hz with less than 0.
LIMITED W ARRANTY I NFORMATION Rockford Corporation offers a limited warranty on Rockford Fosgate products on the following terms: • Length of Warranty 3 years on electronics 2 years on source units 90 days on electronic B-stock (receipt required) 30 days on speaker B-stock (receipt required) • What is Covered This warranty applies only to Rockford Fosgate products sold to consumers by Authorized Rockford Fosgate Dealers in the United States of America or its possessions.
A N A M T R T R IO E IO O T N F N IN A L IN – 49 –
LEA DETENIDAMENTE LAS SIGUIENTES INSTRUCCIONES DE INSTALACIÓN DEL PRODUCTO. EVITARA POSIBLES DAÑOS A VD., AL VEHÍCULO O AL PRODUCTO. INTRODUCCIÓN Los amplificadores de “la serie 250” representan lo ultimo y mejor que Rockford Fosgate puede ofrecerle. Muchas soluciones que nuestros ingenieros han inventado serian consideradas absolutamente desproporcionadas por nuestra competencia.
ESPAÑOL Operación mono/estéreo RCA Input Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal. Input L EZ-180°-0° Bridged R Gain – + 2Ω min. 2Ω min. + + Speaker Terminal Speaker – R + – + – – Speaker Terminal 4Ω min.
ATTENTION: Veuillez lire les instructions suivants pour l'nstallation de ce produit. Ne pas les suivre pourrait causer des blessures ou endommager le véhicule. INTRODUCTION La série d'amplificateurs Power 250 est la vitrine technologique de Rockford Fosgate. Nos ingénieurs utilisent ici des technologies considérées hors d'atteinte par d'autres fabricants.
Opération stéréo/mono (Trimode) RCA Input Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal. Input L EZ-180°-0° Bridged R Gain – + 2Ω min. 2Ω min. + – + – – Speaker Terminal 4Ω min.
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. EINLEITUNG Die “250 Serie” Power Verstärker repräsentiert das Beste, was Rockford Fosgate anzubiete hat! Unsere Ingenieure haben in diesen Verstärkern technische Features realisiert, die in der gesamten Auto HiFi-Industrie, einzigartig sind. Trans•nova, DIAMOND und TOPAZ exklusive entwickelt von Rockford.
Stereo/Mono Betrieb RCA Input Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal. Input L EZ-180°-0° Bridged R Gain – + 2Ω min. 2Ω min. + + Speaker Terminal Speaker – R + – + – – Speaker Terminal 4Ω min.
PREGO LEGGERE LE SEGUENTI ISTRUZIONI PER L'INSTALLAZIONE DI QUESTO PRODOTTO, IL NON SEGUIRLE POTREBBE RISULTARE SERIAMENTE DANNOSO PER LA PERSONA O PER IL VEICOLO.
Stereo/Mono Operation RCA Input Unbal. Speaker + L – 0°-180° Gain L (Mono) R Bal. Pass Thru Bal. Input L EZ-180°-0° Bridged R Gain – + 2Ω min. 2Ω min. + + Speaker Terminal Speaker – R + – + – – Speaker Terminal 4Ω min. • RCA inputs non sono collegati ad entrambi, i canli destro e sinistro • Interruttore di segnale input selezionato per il non bilanciamento per l'input RCA • Fase sinistra dell'interruttore posizionata su 0°.
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 general, some parts may be manufactured in other countries. Rockford Fosgate MAN-1529-B 10/97 Rockford Corporation 546 South Rockford Drive Tempe, Arizona 85281 U.S.A. In U.S.
