Rockford Fosgate PUNCH 200, PUNCH 400, PUNCH 600, PUNCH 800 Operation & Installation Manual

® ®

car audio

fanatics

for

punch

multi-channel Amplifiers
Operation & Installation

®

4-channel

4-channel

4-channel

4-channel

5-channel

PUNCH 200 PUNCH 400 PUNCH 600 PUNCH 800 PUNCH 600

4-channel 4-channel 4-channel 4-channel 5-channel

Dynamic Power Rating (IHF-202 Standard) - Measured at 14.4 Volts Front/Rear + Subwoofer

Mono into a 4Ω Load

165 Watts x 2 220 Watts x 2 317 Watts x 2 525 Watts x 2 240 Watts x

2+ -

Per channel into a 2Ω Load

85 Watts x 4 130 Watts x 4 175 Watts x 4 270 Watts x 4 120 Watts x 4 + 240 Watts x 1

Per channel into a 4Ω Load

55 Watts x 4 85 Watts x 4 99 Watts x 4 150 Watts x 4 75 Watts x 4 + 115 Watts x 1

Continuous Power Rating (Competition Standard) - Measured at 13.8 Battery Volts

RMS continuous power per channel,

25 Watts x 4 50 Watts x 4 75 Watts x 4 100 Watts x 4 50 Watts x 4 + 100 Watts x 1

both channels driven into a 4Ω load

from 20 to 20,000 Hz with less than

0.05% Total Harmonic Distortion (THD)

RMS continuous power per channel,

50 Watts x 4 100 Watts x 4 150 Watts x 4 200 Watts x 4 100 Watts x 4 + 200 Watts x 1

both channels driven into a 2Ω load

from 20 to 20,000 Hz, with less than

0.1% Total Harmonic Distortion (THD)

RMS continuous power mono into a

100 Watts x 2 200 Watts x 2 300 Watts x 2 400 Watts x 2 200 Watts x 2 + -

4Ω load from 20 to 20,000 Hz, with

less than 0.1% Total Harmonic

Distortion (THD)

Signal-to-Noise Ratio >100dB A-weighted

Crossover Slope (Butterworth) 12dB/octave 12dB/octave 12dB/octave 12dB/octave 12dB/octave + 24dB/octave

Crossover Frequency 80Hz 80Hz

50Hz – 210Hz 50Hz – 210Hz 50Hz – 210Hz + 50Hz – 210Hz

Specifications are subject to change without notice.

S

PECIFICATIONS

– i –

PUNCH 200 PUNCH 400 PUNCH 600 PUNCH 800 PUNCH 600

4-channel 4-channel 4-channel 4-channel 5-channel

Dimensions

2.60" (6.60cm) H 2.60" (6.60cm) H 2.60" (6.60cm) H 2.60" (6.60cm) H 2.60" (6.60cm) H

9.60" (24.38cm) W 9.60" (24.38cm) W 9.60" (24.38cm) W 9.60" (24.38cm) W 9.60" (24.38cm) W

9 .70" (24.63cm) L 9.70" (24.63cm) L 10.70" (27.17cm) L 14.70" (37.33cm) L 14.70" (37.33cm) L

Frequency Response 20Hz to 20kHz ±0.5dB

Bandwidth 20Hz to 200kHz ±3dB

Damping Factor @ 4Ω (at output connector ) >200

Slew Rate 30 Volts/ µs

IM Distortion (IHF) <0.05%

Source Unit Compatibility (+15dB gain overlap) 17V max. (low level in)

Input Sensitivity (+0dB gain overlap) Variable from 250mV to 4V (low level in)

Variable from 650mV to 11V (high level in)

Protection NOMAD - Internal analog-computer output protection circuitry limits power in case of

overload. Thermal switch shuts down the amplifier in case of overheating.

Battery Fuse Rating (External to Amplifier) 30A 50A 50A 60A* 50A

Fuse Type ATC AGU AGU AGU AGU

Equalization (45Hz Punch Bass) Variable Variable Variable Variable Variable

(0 to +18dB) (0 to +18dB) (0 to +18dB) (0 to +18dB) (0 to +18dB)

Input Impedance 20k ohms 20k ohms 20k ohms 20k ohms 20k ohms

* recommended fuse not supplied with amplifier

Specifications are subject to change without notice.

– ii –

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.

For maximum performance we recommend you have your new Rockford Fosgate
product installed by an Authorized Rockford Fosgate Dealer, as we provide specialized
training through Rockford Technical Training Institute (RTTI). Please read your
warranty and retain your receipt and original carton for possible future use.

Great product and competent installations are only a piece of the puzzle when it comes
to your system. Make sure that your installer is using 100% authentic installation
accessories from Connecting Punch in your installation. Connecting Punch has
everything from RCA cables and speaker wire to Power line and battery connectors.
Insist on it! After all, your new system deserves nothing but the best.

To add the finishing touch to your new Rockford Fosgate image order your Rockford
wearables, which include everything from T-shirts and jackets to hats and sunglasses.

To get a free brochure on Rockford Fosgate products and Rockford accessories, in the
U.S. call 602-967-3565 or FAX [phone]. For all other countries, call +001-602­967-3565 or FAX [phone].

If, after reading your manual, you still have questions regarding this product,
we recommend that you see your Rockford Fosgate dealer. If you need further
assistance, you can call us direct at 1-800-669-9899. Be sure to have your serial
number, model number and date of purchase available when you call.

PRACTICE SAFE SOUND™

CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100dB

MAY

CAUSE PERMANENT HEARING LOSS. HIGH POWERED AUTOSOUND

SYSTEMS

MAY PRODUCE SOUND PRESSURE LEVELS WELL OVER

130dB. USE COMMON SENSE AND PRACTICE SAFE SOUND.

The serial number can be found on the outside of the box. Please record it in
the space provided below as your permanent record. This will serve as
verification of your factory warranty and may become useful in recovering your
amplifier if it is ever stolen.

Serial Number: ________________________________
Model Number:________________________________

– iii –

T

ABLE OF

C

ONTENTS

Specifications.............................................................................................. i

Introduction................................................................................................1

Punch Amplifier Accessory Pack ................................................................... 1

Feature Chart..............................................................................................2

Design Features ..........................................................................................4

Installation Considerations ...........................................................................7

Mounting Location ......................................................................................8

Battery and Charging ..................................................................................9

Wiring the System....................................................................................... 9

Using Passive Crossovers........................................................................... 11

Table of Component Values........................................................................12

Installation ...............................................................................................13

System Diagrams......................................................................................25

Troubleshooting........................................................................................ 29

Dynamic Power Measurements...................................................................32

Warranty Information ................................................................................34

International Information............................................................................ 35

Sections marked

ADVANCED OPERATION

include in-depth

technical information

Sections marked

TROUBLESHOOTING

include recommendations for

curing installation problems

Sections marked

INSTALLATION

include “slam dunk”

wiring connections

I

N

S
T

A

L
L

A

T

I
O
N

® ®

TROUBLE-

S
H
O
O
T

I
N
G

Welcome to Rockford Fosgate! This manual is designed to provide information
for the owner, salesperson and installer. For those of you who want quick
information on how to install this product, please turn to the

Installation

Section

of this manual or refer to the icons listed below. Other information can
be located by using the Table of Contents. We, at Rockford Fosgate, have
worked very hard to make sure all the information in this manual is current. But,
as we are constantly finding new ways to improve our product, this information
is subject to change without notice.

GETTING STARTED

a
d
v
a
n
c
e
d

O
p
e
r
a
t

i
o
n

I

NTRODUCTION

Rockford engineers designed the Punch multi-channel 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 multi-channel amplifiers that
lets the music sound crystal clear and very real, even when played at high
volume levels. This is matched with TOPAZ, a unique grounding circuit used
to eliminate noise problems associated with car audio systems and their
installation. Flexibility is accomplished with the use of high-level inputs and
a built-in crossover. The use of a protection circuit called NOMAD, along with
MOSFET and DSM (Discrete Surface Mount) and our innovative MEHSA heat
dissipating technology improves amplifier efficiency. The result of these
components give the Punch amplifier awesome sound quality in a “Bullet
Proof” package.

– 1 –

P

UNCH

A

MPLIFIER

A

CCESSORY

P

ACK

The accessory pack shipped with the Punch multi-channel amplifiers includes
the mounting hardware necessary to secure the amp to the vehicle.

Installation & Operation Manual
Punch Verification Certificate
(4) Amplifier mounting screws (#8 x 3/4" Phillips)
(4) Speaker/Power connector set screws (3/32" Allen)
(4) Endbell mounting screws (9/64" Allen)
(1) Allen wrench (3/32")
(1) Allen wrench (9/64")

(2) High Level Input harness (Punch 200/400/600/800, 4-channel)

- Replacement part #CC-1992 - 4 position molex
(1) High Level Input harness (Punch 600, 5-channel)

- Replacement part #CC-2347 - 8 pin mini-DIN
(1) Inline fuseholder (except Punch 800, 4-channel)
(1) ATC 30 amp fuse (Punch 200, 4-channel)
(1) ATC 50 amp fuse (Punch 400/600, 4-channel & Punch 600, 5-channel)

NOTE: Refer to the specifications section for recommended fuse size on the
Punch 800, 4-channel amplifier.

– 2 –

P

UNCH

M

ULTI

-C

HANNEL

A

MPLIFIER FEATURE

C

HART

PUNCH AMPLIFIER MODEL 200 400 600 800 600

F/R + SUB

# of CHANNELS 4 4 4 4 5
RMS Power Stereo (4Ω) 25x4 50x4 75x4 100x4 50x4+ 100x1
RMS Power Stereo (2Ω) 50x4 100x4 150x4 200x4 100x4+ 200x1
RMS Power Bridged/Mono (4Ω) 100x2 200x2 300x2 400x2 200x2 + –
Stable Into: (each channel) 2Ω 2Ω 2Ω 2Ω 2Ω + 2Ω
Stable into: (bridged/mono) 4Ω 4Ω 4Ω 4Ω 4Ω + –

CIRCUITRY

1

TRANS•

ana

– circuit topology x x x x x

TRANS•

nova

– patented circuit topology

2

– – – – –
Class-G – high efficiency topology – – – – SUB only
MEHSA – heat dissipating technology – x x x x
TOPAZ

– patented noise eliminating circuitry

3

x x x x x
DSM – discrete surface mount x x x x x
MOSFETs – power supply & output devices x x x x x
NOMAD – protection circuit x x x x x

FEATURES

Die Cast Heatsink

4

x x x x x
Hi-Level Inputs – for factory radios x x x x F/R only
RCA Inputs – for aftermarket radios x x x x x
Balanced Inputs – – – – –
Input Switches – eliminates “Y” adaptors x x x x x
Pass-Thru – feeds signal to aux. amp x x x x –
Pwr/Spk Screw Terminals – – – – Spk
Pwr/Spk Block Terminals x x x x Pwr
4 Gauge PWR/GND – – – – –

PUNCH AMPLIFIER MODEL 200 400 600 800 600

Adjustable Punch Bass – – – – –
(0dB/+6dB/+12dB @ 45Hz)

Variable Punch Bass – – x x x
(0dB ~+18dB @ 45Hz)

Adjustable Xover (80Hz) – – – – –
Variable Xover (50Hz ~ 210Hz)

HP/FULL/LP5 HP/FULL/LP5 HP/FULL/LP5 HP/FULL/LP5 HP/FULL/LP

5

Crossover Slope (Butterworth) 12dB 12dB 12dB 12dB 12dB + 24dB

6

Phase Warp (00 ~ 1800) – – – – –

GENERAL

B+ Fuse Size 30A ATC 50A AGU 50A AGU 60A AGU7 50A AGU
Dimensions (H x W x L) 2.60"H x 2.60"H x 2.60"H x 2.60"H x 2.60"H

x

9.60"W x 9.60"W x 9.60"W x 9.60"W x 9.60"W

x

9.70"L 9.70"L 10.70"L 14.70"L 14.70"L

(6.60cm x (6.60cm x (6.60cm x (6.60cm x (6.60cm x

24.38cm x 24.38cm x 24.38cm x 24.38cm x 24.38cm x

24.63cm) 24.63cm) 27.17cm) 37.33cm) 37.33cm)

– 3 –

1

Additional information on features, specifications and system designs can be
found at: www.rockfordfosgate.com

2

Trans•nova is patented under "U.S. Patent No. 4,467,288"

3

TOPAZ is patented under "U.S. Patent No. 5,751,823"

4

Diecast Heatsink is patented under "U.S. Patent No. D401,225"

5

HP = 12dB/octave High-Pass / LP = 12dB/octave Low-Pass / FULL = Full Range

6

Front/Rear = 12dB/octave + Sub = 24dB/octave Low-Pass

7

Recommended fuse not supplied with amplifier

--INTERNAL USE ONL Y--

Heatsink Type #4 #4 #5 #6 #6

– 4 –

D

ESIGN

F

EATURES

Punch 200, 4-channel
Punch 400, 4-channel

Punch 600, 4-channel

10

Front High

Level Inputs

Gain

Gain

Crossover
Frequency

Front

R

L

R

L

RearPass-Thru

4-2

Input

Punch

Bass

HP-FULL-LP
Crossover

Front

Rear High

Level Inputs

Crossover

Frequency

Punch

Bass

Rear

L+
L–

R+
R–

Hz

65

80

55

50

110

210

Hz

145

190

Hz

L+
L–

R+
R–

65

80

55

50

110

210

Hz

145

190

HP-FULL-LP
Crossover

REM

B+ GND

LED

LR+ LR– RR+ RR– LF– LF+ RF– RF+

2

3

211

2

56

109

810 6 10 84

9

7

1

L+
L–

R+
R–

L+
L–

R+
R–

Front
Gain

HP–Full–LP
Front 80Hz

Crossover

Front
High
Level
Input

Front

Pass-Thru

Rear

RR

LL

Rear

High
Level
Input

4 – 2
Input

HP-Full-LP
Rear 80Hz

Crossover

Rear

Gain

REM

LED

LR+ LR–

RR+ RR–

B+

GND

LF– LF+ RF– RF+

8

10

465610

8

7

2

32 11 2

1

D

ESIGN

F

EATURES

– 5 –

Punch 800, 4-channel

10

2

3

11

2

5

8

10

7

1

LR+ LR- RR+ RR-

REM

B+ GND

LED

LF- LF+ RF+RF-

Hz

Front
Crossover
Frequency

Front
Gain

Front High

Level Input

L+
L–

R+
R–

Front

Punch

Bass

Front Pass-Thru Rear

RR

LL

Rear
High

Level

Input

Rear

Punch

Bass

Crossover

HP-Full-LP

Crossover

HP-Full-LP

4-2

Input

Rear
Crossover
Frequency

Rear

Gain

L+
L–

R+
R–

65

80

55

50

110

210

Hz

145

190

Hz

65

80

55

50

110

210

Hz

145

190

2

10

6 9

10

6

9

4

8

Punch 600, 5-channel

549 6

10

9 9

10

10

10 10

1

Sub LP

Crossover

Frequency

Sub

Gain

65

80

55

50

110

210

Hz

145

190

6/4/2
Input

Sub Rear Front

R

L

R

L

Sub

Punch

Bass

Rear

Crossover

Frequency

Rear

Punch

Bass

Rear
Gain

High Level

Input

Front
Crossover
Frequency

Front
Punch
Bass

Front
Gain

HP-Full-LP

Front

Crossover

HP-Full-LP

Rear

Crossover

65

80

55

50

110

210

Hz

145

190

GND

LF-LF+

RF+

RF-

LR+

RR-

RR+

LR-

LR+

LR-

RR+

RR-

RF- LF+ Sub-

RF+ LF- Sub+

REM

B+

GND

LED

LR+

LR-

RR+

RR-

RF- LF+ Sub-

RF+ LF- Sub+

11

232 888

– 6 –

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. Speaker/Power Terminals – The heavy duty, gold-plated terminal block
connectors (+ and –) will accept wire sizes from 8 AWG to 18 AWG and are
immune to corrosion that can cause signal degradation. The Punch 600,
5-channel also utilizes a barrier strip that will accept #8 spade lugs or bare
speker wires sized from 12-18 AWG.

3. REM Terminal – This spade terminal is used to remotely turn on and turn off
the amplifier when +12V DC is applied.

4. Signal Input Switch – This switch allows the amplifier to be driven with
either 2 or 4 pairs of inputs. The Punch 600, 5-channel allows the amplifier
to be driven with either 2, 4, or 6 pairs of inputs.

5. RCA Input Jacks – The industry standard RCA jacks provide an easy
connection for signal level input. They are gold-plated to resist the signal
degradation caused by corrosion.

6. High Level Inputs – The high level inputs use a detachable connector
terminated with 20 AWG leads. These inputs should be used if the source unit
has only speaker line (high level) outputs and not RCA outputs.

7. 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.

8. Gain Control – The input gain control is preset to match the output of most
source units. It can be adjusted to match output levels from a variety of source
units.

9. Punch Bass – The Punch Bass helps correct for acoustical deficiencies in the
listening environment by helping reproduce full range sound without adding
excessive boost. The Punch Bass control is a narrow band adjustment
centered at 45Hz variable from 0dB to +18dB.

10. Internal Crossover – The internal crossover is a 12dB/octave Butterworth
filter selectable for High-Pass (HP), Full Range (FULL), or Low-Pass (LP)
operation. The Punch 200/400, 4-channel amplifiers utilize a fixed 80Hz
crossover. The Punch 600/800, 4-channel and Punch 600, 5-channel
amplifiers utilize a crossover variable from 50Hz to 210Hz with the Sub
channel operating at 24dB/octave.

11. LED Power Indicator – The LED illuminates when the unit is turned on.

I

NSTALLATION

C

ONSIDERATIONS

The following is a list of tools you will need for installing the Punch amplifier:
Voltmeter Wire strippers
Electric hand drill w/assorted bits Battery post wrench
17' (5 m) Red Power Wire Wire cutters
12' (4 m) Remote Turn-On Wire Assorted connectors

1.5' (45 cm) Black Grounding Wire Wire crimpers

– 7 –

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 will be easily accessible for making adjustments.

Before beginning any installation, be sure to follow these simple rules:

1. Be sure to carefully read and understand the instructions before attempt-

ing to install the amplifier.

2. For safety, disconnect the negative lead from the battery prior to

beginning the installation.

3. For easier assembly, we suggest you run all wires prior to mounting your

amplifier in place.

4. Route all of the RCA cables close together and away from any high

current wires.

5. Use high quality connectors for a reliable installation and to minimize

signal or power loss.

6. Think before you drill! Be careful not to cut or drill into gas tanks, fuel

lines, brake or hydraulic lines, vacuum lines or electrical wiring when
working on any vehicle.

7. Never run wires underneath the vehicle. Running the wires inside the

vehicle provides the best protection.

8. Avoid running wires over or through sharp edges. Use rubber or plastic

grommets to protect any wires routed through metal, especially the
firewall.

9. ALWAYS protect the battery and electrical system from damage with

proper fusing. Install a fuseholder and appropriate fuse on the +12V
power wire within 18” (45 cm) of the battery terminal.

10. When grounding to the chassis of the vehicle, scrape all paint from the

metal to ensure a good, clean ground connection. Grounding connec­tions should be as short as possible and always be connected to metal
that is welded to the main body, or chassis, of the vehicle.

M

OUNTING

L

OCATION

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 amplifier, care should be taken to ensure adequate
ventilation.

Trunk Mounting

Mounting the amplifier vertically on a surface with the fin grooves running
up and down will provide the best cooling of the amplifier.

Mounting the amplifier on the floor of the trunk will work but provides less
cooling capability than vertical mounting.

Mounting the amplifier upside down to the rear deck of the trunk will not
provide proper cooling and will severely affect the performance of the
amplifier and is strongly

not

recommended.

Passenger Compartment Mounting

Mounting the amplifier in the passenger compartment will work as long as
you provide a sufficient amount of air for the amplifier to cool itself. If you
are going to mount the amplifier under the seat of the vehicle, you must have
at least 1" (2.54cm) of air gap around the amplifier's heatsink.

Mounting the amplifier with less than 1" (2.54cm) of air gap around the
amplifier's heatsink in the passenger compartment will not provide proper
cooling and will severely affect the performance of the amplifier and is
strongly

not

recommended.

Engine Compartment Mounting

Rockford Fosgate amplifiers should

never

be mounted in the engine
compartment. Not only will this void your warranty but could create an
embarrassing situation caused by the ridicule from your friends.

– 8 –

B

ATTERY 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 should be able to handle the extra load of any Rockford
amplifier without problems, although battery and alternator life can be
reduced slightly. To maximize the performance of your Rockford Fosgate
amplifier, we suggest the use of a heavy duty battery and an energy storage
capacitor.

W

IRING THE

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. Plan the wire routing. Take care when running signal level RCA cables
to keep them close together but isolated from the amplifier's power
cables and any high power auto accessories, especially electric
motors. This is done to prevent coupling the noise from radiated
electrical fields into the audio signal. When feeding the wires through
the firewall or any metal barrier, protect them with plastic or rubber
grommets to prevent short circuits. Leave the wires long at this point
to adjust for a precise fit at a later time.

2. Prepare the Power cable for attach-
ment to the amplifier by stripping
5/8" of insulation from the end of
the wire. The use of 8 gauge power
cable can interfere with the installa­tion of the end caps. Proper wire
dress can prevent this from occur­ring. To prevent the wire from fray­ing, strip the insulation at a 45°
angle. Insert the bared wire into the B+ terminal with the long side of
the insulation on the top. Bend the cable down at a 90° angle. Tighten
the set screw to secure the cable in place.

3. Strip 3/8" from the battery end of the power cable and crimp a large
ring terminal to the cable. Use the ring terminal to connect to the
battery positive terminal. Do not install the fuse at this time.

><

5/8"

INSULATION

STRIP WIRE

>

>

AMP

>

– 10 –

4. Prepare a length of cable to be used for the ground connection. Strip
5/8" of insulation from the end of the cable as described above and
connect to the appropriate terminal of the amplifier. Prepare the chassis
ground by scraping any paint from the metal surface and thoroughly
clean the area of all dirt and grease. Strip the other end of the wire and
attach a ring connector. Fasten the cable to the chassis using a non­anodized screw and a star washer.

5. Prepare the REM turn-on wire for connection to the amplifier by stripping
1/4" of insulation from the wire end and crimping an insulated spade
connector in place. Slide the connector over the REM terminal on the
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
mechanical switch in line with a 12 volt source to activate the amplifier.

6. Securely mount the amplifier (with supplied screws) to the vehicle or
amp rack. Be careful not to mount the amplifier on cardboard or plastic
panels. Doing so may enable the screws to pull out from the panel due
to road vibrations or sudden vehicle stops.

7. Determine the number of inputs needed to drive the amplifier and move
the input switch to the desired setting.

8. Connect the source signal to the amplifier by plugging the RCA cables
or high level inputs into the input jack(s) at the amplifier.

9. 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.

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 –

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 (capaci­tors), Low-Pass (inductors or coils) and Bandpass (combination of capacitor
and coil).

The most commonly used passive crossover networks are 6dB/octave
systems. These are easy to construct and require one component per filter.
Placing this filter in series with the circuit will reduce power to the speaker by
6dB/octave above or below the crossover point depending on whether it is a
high-pass or low-pass filter. More complex systems such as 12dB/octave or
18dB/octave can cause impedance problems if not professionally designed.

Passive crossovers are directly dependent upon the speaker's impedance and
component value for accuracy. When passive crossover components are
used in multiple speaker systems, the crossover's effect on the overall
impedance should be taken into consideration along with the speaker's
impedance when determining amplifier loads.

CAUTION: The Punch ampli-

fiers are not recommended for impedance loads below 2Ω stereo and 4Ω
bridged (mono) loads.

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– 12 –

T

ABLE OF

C

ROSSOVER

C

OMPONENT

V

ALUES

6dB/Octave Low-Pass

6dB/Octave High-Pass

Freq.
Hertz

Speaker Impedance

80 4.1mH 1000µF 8.2mH 500µF 16mH 250µF
100 3.1mH 800µF 6.2mH 400µF 12mH 200µF
130 2.4mH 600µF 4.7mH 300µF 10mH 150µF

200 1.6mH 400µF 3.3mH 200µF 6.8mH 100µF
260 1.2mH 300µF 2.4mH 150µF 4.7mH 75µF
400 .8mH 200µF 1.6mH 100µF 3.3mH 50µF

600 .5mH 136µF 1.0mH 68µF 2.0mH 33µF
800 .41mH 100µF .82mH 50µF 1.6mH 26µF

1000 .31mH 78µF .62mH 39µF 1.2mH 20µF

1200 .25mH 66µF .51mH 33µF 1.0mH 16µF
1800 .16mH 44µF .33mH 22µF .68mH 10µF
4000 .08mH 20µF .16mH 10µF .33mH 5µF

6000 51µH14µF .10mH 6.8µF .20mH 3.3µF
9000 34µH 9.5µF68µH 4.7µF .15mH 2.2µF

12000 25µH 6.6µF51µH 3.3µF 100µH 1.6µF

2 OHMS

8 OHMS

4 OHMS

L

C L

C

L C

L

C

L = Low-Pass (Inductor)
C = High-Pass (Capacitor)

For more information, see your Authorized Rockford Fosgate Dealer.

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