Rockford Fosgate 400x4 manual

®® I NST ALLA TION & O PERA TION M ANUAL   4 ® trans • ana 4- C HANNEL A MPLIFIER[...]

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Dear Customer, Congratulations on your purchase of the world's finest brand of car audio amplifiers. At Rockford Fosgate we are committed to 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 prod[...]

T ABLE OF C ONTENTS Introduction ...................................................................................... 1 Punch 4-Channel Amplifier Accessory Pack ...................................... 1 Rockford Fosgate Accessories ............................................................ 2 Technical Design Features ............................[...]

I NTRODUCTION The Punch 400x 4 (pronounced “ x4 ” not “ by 4 ” ) is a 4-channel amplifier which can deliver 400 watts RMS. This amplifier utilizes a 2/4-channel input switch to eliminate the need for signal splitters. Four internal XCard crossovers allow the ampli- fier to be configured for use with many popular system designs without the a[...]

R OCKFORD F OSGA TE A CCESSORIES The following accessories were designed to enhance the perfor- mance of the Punch 400x 4 amplifiers. Energy Storage Capacitor The Punch capacitors are used to provide extra current needed by amplifiers to reproduce musical transients. The Punch Caps also have the natural ability to filter AC ripple caused by the alt[...]

T ECHNICAL D ESIGN F EA TURES – 3 – ◆ TOP AZ (T racking Operation Pre-Amplifier Zone) The TOPAZ ( T racking O peration P re- A mplifier Z one) circuitry solves ground loop noise problems common to automotive amplifier design. This innovative new development allows vastly improved isolation of the input signal grounds from the power supply gro[...]

◆ DSM (Discrete Surface Mount) Technology The DSM (Discrete Surface Mount) manufacturing process com- bines the advantages of both discrete components and integrated circuitry. Rockford Fosgate is the only American amplifier manu- facturer to have invested millions into this process. DSM compo- nents differ from conventional discrete components i[...]

◆ RTP (Real Time Protection) NOMAD (NOn-Multiplying Advanced Decision) The Punch and Power amplifiers use an analog computer process to maximize safe output power under all operating conditions. Rock- ford Fosgate pioneered and developed RTP (Real Time Protection), a crucial element in the performance edge of our amplifiers. The innovative NOMAD [...]

◆ Pass-Thru Output The Pass-Thru output provides a convenient source for daisy- chaining an additional amplifier without the need for extra RCA cables or “ Y ” adapters. The Pass-Thru signal is derived from summing the Front and Rear Left inputs to create a Left output, and summing the Front and Rear Right inputs to create a Right output. Whe[...]

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 – Interchangeable end caps conceal the wiring and input ca[...]

7. Signal Input Switch – This switch allows selection of 2-channel or 4-channel input. 8. RCA Pass-Thru Jacks – The Pass-Thru provides a convenient source for daisy-chaining an additional amplifier without running an extra set of RCA cables from the front of the vehicle to the rear amplifier location. One of the internal XCards can be designate[...]

I NST ALLA TION C ONSIDERA TIONS This section focuses on some of the vehicle considerations for installing your new Punch amplifier. Checking your battery and present sound system, as well as pre-planning your system layout and best wiring routes will save installation time. When deciding how to lay out your new system, be sure that each component [...]

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 condi- tions. However, to maximize the performance of your am[...]

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 should be able to handle the extra load[...]

3. Mount the fuseholder within 18" of the battery using two (2) #8 screws. Disassemble the fuseholder. You should have 2 black plastic end caps, 2 gold-plated fuse clips, a plastic spacer and the fuseholder body. Trim the amplifier power cable to reach the fuseholder and strip the wire 3/8". Slide one of the end caps over the wire (narrow[...]

8. Connect the speakers. Strip the speaker wires 5/8" and insert into the appropriate terminal on the amplifier. Insert the bared wire into the speaker terminal and tighten the set screw to secure into place. Be sure to maintain proper speaker polarity. DO NOT chassis ground any of the speaker leads as unstable operation may result. 9. Perform[...]

U SING 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. 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 ope[...]

XC ARD C ONFIGURA TIONS REM B+ GND LED Rear Front XCard Rear 1 XCard Front XCard Pass-Thru LP 20Hz-100Hz 12dB/octave LP Full Range XCard Rear 2 –L+ +L– + R – – R + –L+ REM B+ GND LED + L – +R– Rear Front Front XCard XCard Rear 1 XCard Rear 2 XCard Pass-Thru HP 100Hz-20kHz 12dB/octave HP –R+ Configure a 12dB/octave filter for the Fro[...]

– 16 – Configure a 24dB/octave filter for the Rear channels. • Rear XCards 1 & 2 set identically to High-Pass or Low-Pass REM B+ GND LED Rear Front XCard Rear 1 XCard Front XCard Pass-Thru LP 20Hz-100Hz 24dB/octave LP LP XCard Rear 2 –L+ +L– + R – – R + Configure a 12dB/octave Bandpass filter for the Rear channels. –L+ REM B+ GN[...]

LP XCard Pass-Thru Front Gain Rear Gain 0/180 4/2 20Hz-100Hz 12dB/octave LP XCard Front XCard Rear1 XCard Rear2 – 17 – Configure a 12dB/octave filter for the Pass-Thru • Pass-Thru XCard set to High-Pass or Low-Pass[...]

U SING THE S IGNAL I NPUT S WITCH 2-Channel Input – 18 – • RCA s connected to Front inputs • Signal Input Switch set to 2-channel input • Pass-Thru is a non-fading summed output • This configuration eliminates the need for signal splitters Front Gain Rear Gain 0 ° /180 ° 4/2 Input INPUT L - Summed Output R - Summed Output 1 2 REM B+ G[...]

– 19 – • RCA s connected to Front & Rear inputs • Signal Input Switch set to 4-channel input • Pass-Thru is a non-fading summed output • This configuration allows for Front & Rear fading Front Gain Rear Gain 0 ° /180 ° 4/2 Input INPUT L - Summed Output R - Summed Output 1 2 REM B+ GND LED Rear Front Pass-Thru – L+ +L – +R [...]

B ASIC C ONNECTIONS Power Connections – 20 – Connect to remote turn-on lead of source unit Connect to B+ of battery with a 50 amp fuse Connect to chassis ground of vehicle* Less than 18" GND B+ LED +L – +R –– L+ – R+ *Keep grounds as short as possible.[...]

– 21 – 2-Channel Stereo Operation Front Gain Rear Gain 0/180 4/2 INPUT REM B+ GND LED Rear Front Pass-Thru Front Rear 4 ohm min. left 4 ohm min. right + – + – – L+ +L – +R –– R+ • RCAs are connected to front inputs • Signal Input Switch set to 2-channel input • Phase Switch set to 0 ° • Gain for front and rear left channels[...]

2-Channel Mono Operation – 22 – Front Gain Rear Gain 0/180 4/2 INPUT REM B+ GND LED Rear Front Pass-Thru Front Rear 4 ohm min. 4 ohm min. + – + – – L+ +L – +R –– R+ • RCAs are connected to front inputs • Signal Input Switch set to 2-channel input • Phase Switch set to 0 ° • Gain for front left and right channels set equally[...]

3-Channel Operation – 23 – Front Gain Rear Gain 0/180 4/2 – L+ REM B+ GND LED +L – Rear Front Pass-Thru Front Rear 4 ohm min. 2 ohm min. + – + – 4-Ch. { 2-Ch. { INPUT + – 2 ohm min. +R –– R+ * Adjust the phase switch to 180 ° if XCard for front channel is set to HP and XCard for rear channel is set to LP (or vice versa). • RCAs[...]

4-Channel Stereo Operation – 24 – 2 ohm min. + – + – 2 ohm min. Front Gain Rear Gain 0/180 4/2 – L+ REM B+ GND LED +L – Rear Front Pass-Thru Front Rear 2 ohm min. + – 4-Ch. { 2-Ch. { INPUT + – 2 ohm min. +R –– R+ • RCAs are connected to front or front and rear inputs • Signal Input Switch is set to 2-channel or 4-channel inp[...]

4-Channel Stereo/Single Mono Operation – 25 – 2 ohm min. + – + – 2 ohm min. Front Gain Rear Gain 0/180 4/2 – L+ REM B+ GND LED +L – Rear Front Pass-Thru Front Rear 2 ohm min. + – 4-Ch. { 2-Ch. { INPUT + – 2 ohm min. +R –– R+ 4 ohm min. + – • RCAs are connected to front or front and rear inputs • Signal Input Switch is set [...]

4-Channel Stereo/Dual Mono Operation – 26 – 2 ohm min. + – + – 2 ohm min. Front Gain Rear Gain 0/180 4/2 – L+ REM B+ GND LED +L – Rear Front Pass-Thru Front Rear 2 ohm min. + – 4-Ch. { 2-Ch. { INPUT + – 2 ohm min. +R –– R+ 4 ohm min. + – + – 4 ohm min. • RCAs are connected to front or front and rear inputs • Signal Input[...]

S YSTEM D IAGRAMS 200 Watt 3-Way System – 27 – 4 ® trans • ana ® RF A-812 Front Rear + – + – 24dB/octave LP 20Hz - 100Hz RF A-414 12dB/octave HP 100Hz - 20kHz 2X-4 2X-4 RF A-414 + – + – + – + – + – + –[...]

400 Watt 4-Way System – 28 – 4 ® trans • ana ® RF A-812 Front Rear + – RF A-414 12dB/octave HP 275Hz - 20kHz 2X-4 2X-4 RF A-414 + – + – + – + – + – + – 24dB/octave LP 20Hz - 100Hz + – DSM ® 2 + – + – 12dB/octave LP 12dB/octave HP 100Hz - 275Hz Pass-Thru[...]

600 Watt 4-Way System – 29 – RF A-812 Front Rear + – 24dB/octave LP 20Hz - 100Hz + – DSM ® 2 + – + – 12dB/octave LP 12dB/octave HP 100Hz - 275Hz 4 ® trans • ana ® RF A-414 12dB/octave HP 275Hz - 20kHz 2X-4 2X-4 RF A-414 + – + – + – + – + – + – 4 ® trans • ana ® RF A-414 12dB/octave HP 275Hz - 20kHz 2X-4 2X-4 RF A-41[...]

800 Watt 4-Way System – 30 – RF A-812 Front Rear + – 24dB/octave LP 20Hz - 100Hz + – DSM ® 2 + – + – 12dB/octave LP 12dB/octave HP 100Hz - 275Hz 4 ® trans • ana ® RF A-414 12dB/octave HP 275Hz - 20kHz 2X-4 2X-4 RF A-414 + – + – + – + – + – + – 4 ® trans • ana ® RF A-414 12dB/octave HP 275Hz - 20kHz 2X-4 2X-4 RF A-41[...]

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+ termi- nal of the amplifier is not between 10.5 and 15.5 volts or there is no voltage present. Amplifier is not prop- erly g[...]

Speaker Output Low or Distorted Readjust input gains of amplifier. Check system with known working source and repair or replace original source as needed. Check XCard position and repair or replace as neces- sary. Check the alternator, bat- tery, fuse, and power and ground wiring. Repair as necessary. Symptom Diagnosis Remedy Input gain signal for [...]

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 voltage. Check connection[...]

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 stan- dards. 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 wo[...]

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[...]

400 X 4 S PECIFICA TIONS Continuous Power Rating (Competition Standard) – Measured at 13.8V RMS continuous power per channel , all channels 50 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 100 Watts driven into a 2 Ω load from 20-20000Hz, with[...]

W ARRANTY I NFORMA TION Rockford Fosgate warrants all electronics to the original consumer/purchaser to be free from defects in materials or workmanship for a period of three (3) years. We will cover parts and labor provided the product was purchased from an Authorized Rockford Fosgate Dealer. This warranty does not apply to any product on which th[...]

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Rockford Fosgate Rockford Corporation 546 South Rockford Drive Tempe, Arizona 85281 U.S.A. In U.S.A., (602) 967-3565 In Europe, Fax (49) 4207-801250 In Japan, Fax (81) 559-79-1265 6/95 MAN-0993-A[...]