Rockford Fosgate 2600X User Manual

Series 1  
2300 / 2600X / 4600X  
AMPLIFIERS  
O W N ER' S MAN U AL  
®
®
TA B L E O F C O N T E N T S  
Specifications .................................................................................... 1  
Introduction ...................................................................................... 3  
Operating Features ..................................................................... 3  
Design Features................................................................................. 4  
Installation Considerations ................................................................ 6  
Tools Needed ............................................................................. 7  
Battery & Charging ............................................................................ 7  
Mounting Locations .......................................................................... 7  
Trunk Mounting.......................................................................... 7  
Passenger Mounting ................................................................... 8  
Wiring the Series 1 ............................................................................ 8  
Power ......................................................................................... 8  
Ground ....................................................................................... 8  
Remote Turn-on ......................................................................... 8  
Input........................................................................................... 9  
Speakers ..................................................................................... 9  
Bridged/Mono Configuration ...................................................... 9  
Active Crossover Mode Selections for the 2600x and 4600x ........... 10  
Crossover Frequency Settings ................................................... 10  
Wiring Diagrams ............................................................................. 11  
Troubleshooting .............................................................................. 17  
Dynamic Power Measurements ....................................................... 20  
Warranty Information ...................................................................... 22  
– 1 –  
– 2 –  
I N T R O D U C T I O N  
This manual provides information on the features, installation and  
operation of the Series 1 2300, 2600x and 4600x Amplifiers. We  
suggest you save this manual for future reference.  
We strongly recommend you have your Authorized Rockford Fosgate  
Dealer and Service Center install your new Series 1 amplifier. If you  
do choose to install your Series 1 amplifier yourself, please be sure to  
read the entire manual before beginning.  
OPERATING FEATURES  
The Series 1 stereo power amplifiers provide state-of-the-art sound in  
cars, vans, boats, or wherever a high current 12 volt power source is  
available. Features include:  
Discrete Surface Mount Technology – a manufacturing method that  
allows the packaging of complex circuitry in small areas, reducing  
noise and crosstalk for lower distortion.  
Active Electronic Crossover Module – built into the 2600x and 4600x  
features 12dB/octave Butterworth filters. The independent crossover  
modes in these plug-in modules allow for various configuration  
possibilities.  
N-Type V-FET Output Drive Circuitry– delivers music with lower  
noise and distortion while maintaining a higher slew rate, increased  
efficiency and higher power output capability than most amplifiers of  
this class.  
High Current/High Voltage Output – delivers the power needed for  
all listening levels and music frequencies to hear every note.  
Pulse Width Modulated (PWM) DC/DC Non-Regulated Power  
Supply – assures wider dynamic headroom than the more common  
regulated power supplies.  
High or Low Level Adjustable Input Sensitivity – permits maximum  
compatibility with source units. This allows adjustment of the input  
sensitivity level of the power amplifier for RCA (preamp level) or  
speaker (high level) inputs.  
Real Time Power Protection (R.T.P.P.) – allows for the greatest power  
output under all load conditions. When output reaches an unsafe  
level it will be reduced, unlike current limiting which often causes  
premature protection or failure to protect at all.  
– 3 –  
Gold-Plated Connectors – of high quality to provide lower resistance  
and better reliability.  
Series 1 Housing – The extruded aluminum heatsink design of the  
Series 1 was designed for high performance cooling.  
D E SI G N FE AT U R E S  
Input/LED Side  
3.  
2.  
1.  
4.  
for 4600x model  
1. Low Level RCA Input Connectors  
The amplifier’s signal input female RCA pin jacks should be  
connected to the source units signal outputs with high quality  
RCA cables. The connectors are gold plated to eliminate the  
possibility of corrosion that can cause signal deterioration.  
2. High Level Speaker Input Connectors  
These connectors are used to connect to a source unit that does  
not provide low level RCA outputs. This connector accepts 1/8"  
spade lugs. Do not attempt to solder wires directly to this  
connector.  
3. LED Power Indicator  
The LED illuminates when the unit is in operation.  
4. Input Gain Control  
Thiscontrolisfactorypresetto 500 millivoltsto match mostradios  
and is variable from 250 millivolts to one volt. (More than likely  
it will not need adjusting.)  
If just a little movement of the volume control from the source unit  
drives the amplifier into distortion, reduce the input gain control  
so that the distortion doesn’t start until the source unit volume  
control is at about 3/4 of its rotation.  
– 4 –  
Power/ Speaker Side  
+ R  
+ L  
R +  
L +  
+
B r i d g e d  
B r i d g e d  
+
for 4600x model  
5. Power/Speaker Connectors  
The gold-plated terminal block connectors are:  
GND Supplies ground to the amplifier.  
AP  
B+  
The amplifieristurned on byconnectingthe remote turn-  
on wire to the source unit's “Auto Antenna” or remote  
turn-on lead, eitherofwhich should go to +12 voltswhen  
the source unit is activated.  
Supplies power to the amplifier.  
+R–  
+L–  
Connect the Right and Left channel outputs to the  
speakers.  
The terminal block connector accepts wire sizes from 10 gauge  
to 20 gauge. *  
Spade connectors are not needed because of the design of the  
connector. The installer should be careful not to allow wires to  
fray or touch. The recommended strip length is 1/4" (.635cm).  
*Rockford Fosgate’s Perfect Interface line of accessories includes high  
qualitypowerand speakerwire, gold-plated RCAinterconnectingcables  
and other products to complete your installation. Ask your Authorized  
Rockford Fosgate Dealer about Perfect Interface.  
– 5 –  
I N STAL L AT I O N C O N SI D E R AT I O N S  
This section focuses on some of the vehicle considerations for  
installing your new Series 1 amplifier. Checking your battery and  
current 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  
attempting to install the amplifier.  
2. For safety, disconnect the battery ground cable prior to begin-  
ning the installation process.  
3. For easier assembly, we suggest you run all wires prior to  
mounting your amplifier in place.  
4. Use only quality connectors for making connections. See your  
Authorized Rockford Fosgate Dealer for Perfect Interface wire  
enhancements.  
5. 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.  
6. Never run wires underneath the vehicle. Running the wires  
inside the vehicle provides for the best protection.  
7. Avoid running wires over or through sharp edges. Use rubber or  
plastic grommets to protect wires routed through holes in metal.  
8. ALWAYS protect the battery and electrical system from damage  
with proper fusing. Install a fuseholder and fuse within 18” (45.7  
cm) of the battery terminal to safeguard from possible damage or  
injury. This fuse and fuseholder is included with the Series 1  
amplifier. (See installation instructions on page 8.)  
9. Grounding connections should be as short as possible and  
always connected to metal that is welded to the main body, or  
chassis, of the vehicle.  
– 6 –  
TOOLS & SUPPLIES NEEDED  
Wire Cutters  
Wire Strippers  
Wire Crimpers  
Voltmeter  
Phillips Screwdrivers  
Flat Blade Screwdrivers  
Battery Post Wrench  
Electric Hand Drill with assorted bits  
Power Wire - [10-12 AWG; approx. 17’ (518.72 cm)]  
Grounding Wire - [10-12 AWG.; max. length 1.5’ (45.72 cm)]  
Remote (AP) Turn-On Wire - [18 AWG; approx. 12’ (365.76 cm)]  
Assorted wire connectors  
In-line butt connectors that match power and ground wire AWG  
3/8" (.953cm) Battery Ring Terminal  
1/4" (.635cm) Ground Terminal  
1-1/2" (3.81cm) #8 Pan Head Mounting Screws (4)  
BATTERY AND CHARGING  
Series 1 amplifiers will naturally put an extra load on your battery and  
charging system. We recommend you check your alternator capac-  
ity to ensure ample charging capability to handle the additional load  
of your new Series 1 equipment. Stock electrical systems in good  
condition will typically handle the extra load of any individual Series  
1 unit without problems, although battery and alternator life may be  
slightly reduced. If problems arise, we suggest you first check the  
charging system, then use a heavy duty battery and/or a high output  
alternator.  
M O U N T I N G LO C AT I O N S  
The mounting location and position of the Series 1 will have a great  
effect on its ability to dissipate the heat generated in normal opera-  
tion. The Series 1 has a heatsink designed for heat dissipation and  
internal overheating shutoff circuitry to avoid overheating. The  
amplifier is reasonably tolerant of mounting variations, however,  
care should be taken to ensure adequate ventilation.  
TRUNK MOUNTING  
The temperature inside a trunk can reach as high as 175° F (80° C)  
during the summer months. Since the thermal shutoff point for the  
Series 1 is 195° F (90° C), it is easy to see that the amplifier must be  
mounted for maximum cooling capability. Mounting the amplifier  
on the floor or under the rear parcel tray prevents sufficient convec-  
tional air flow cooling. Mounting the unit vertically on a surface with  
the fin grooves running up and down usually results in the best  
cooling.  
– 7 –  
PASSENGER MOUNTING  
Under the seat or floor mounting will work as long as there is a  
minimum of 1” (2.5 cm) of air gap above the amplifier heatsink.  
Vertical mounting of the amplifier is still the best.  
W I R I N G T H E SE R I E S 1  
Caution! Be sure to avoid running the power wires near the low  
level input cables, antenna, sensitive equipment or harnesses. The  
power wires carry substantial currents and could induce noise.  
1. Power The gold B+ terminal must be connected directly to the  
positive (+) terminal of the battery with an appropriate size wire.  
(See the Specifications for more information.) This provides a  
power source with a low voltage drop and low noise.  
Be sure to use the supplied fuse and fuseholder within 18”  
(45.7cm) of the batterys positive terminal. Failure to do so may  
cause damage to the vehicle and the amplifier.  
Note: You will need to cut the wire loop that  
Cut  
here  
is attached to the fuse holder in half and  
splice the fuse into the power line using  
appropriate in-line butt connectors.  
X
If the power wire must be extended beyond  
17(518.16 cm), we recommend the use of 10  
gauge stranded wire.  
2. Ground The GND terminal grounds the amplifier and is  
connected to the chassis of the vehicle. When grounding, scrape  
paint off metal to ensure a good, clean ground connection. To  
preventground loops, we recommend you refrain from extending  
the ground wire beyond 18(45.72 cm) in any installation.  
3. Remote Turn-On The Series 1 amplifiers are turned on by  
supplying positive (+) 12 volts to the AP terminal. Usually the  
terminal is connected to the source units Accessoryor Auto  
Antennalead, either of which will go to +12 volts when the  
source unit is activated.  
Although the majority of high quality automotive source units  
have an Accessory or Antenna output, there may be exceptions.  
Ifthe source unithasno Auto Antenna lead (orifthe Auto Antenna  
goes down during tape/CD operation), we recommend a switch  
in the car with one terminal connected to +12 volts and the other  
to the Series 1 AP lead. This will allow you to engage the amplifier  
manually.  
– 8 –  
4. Input The amplifiers signal input RCA jacks should be con-  
nected to the source units signal outputs with high-quality  
braided or double-shielded interconnecting RCA cables.  
Note: Be sure to route the Series 1 signal input cable away from  
the main power wire and the cars wiring harnesses to avoid  
noise coupling.  
If the source unit does not utilize RCA cables, connect the left and  
right positive speaker output wires from the source unit to the  
amplifiers High Level Speaker Input Connector. The center pin is  
then connected to the chassis of the source unit.  
5. Speakers Series 1 amplifiers are rated for safe operation into  
loads of 2or greater in stereo mode, or 4in bridged/mono  
configurations. The primary loads on any amplifier come from  
directly connected speakers without using capacitors. The mea-  
sured resistance for each side should not be less than 2stereo or  
4bridged/mono.  
6. Bridged/Mono Configuration The Series 1 amplifiers are ca-  
pable of bridged/mono configurations.  
This configuration enables you to:  
Run a single woofer with stereo satellites  
Run two bridged amplifiers as a high power stereo system  
Run one amplifier with a bridged/mono woofer and another  
as a high-frequency stereo amp, etc.  
Note: The 4600x allows the above 3 configurations all in one.  
For more information refer to the wiring diagrams beginning on  
page 14.  
Note: To bridge the amplifier, use the L+ and Rspeaker  
connectors.  
CAUTION! Series 1 amplifiers are not recommended for imped-  
ance loads below 2stereo or 4bridged/mono.  
Be sure to observe proper speaker terminal polarity throughout  
the system. It iscriticalfor the Series1 to use the correct negative  
terminal for right and left channels, since the RIGHT NEGATIVE  
(-) TERMINAL is the hotterminal for the right speaker. DO  
NOT chassis ground any of the speaker leads as unstable opera-  
tion may result.  
– 9 –  
ACTIVE CROSSOVER MODE SELECTIONS FOR  
THE 2600X AND 4600X  
The Series 1 2600x and the 4600x amplifiers feature a selectable  
electronic crossover. One module controls two output channels that  
can be configured in a High-Pass, Low-Pass, or Full Range (factory  
default) position. (Note: The 4600x has 2 modules as it is a 4-channel  
amplifier). Selection is made by positioning a removable module  
card. Both the 2600x and 4600x are shipped with 100Hz 12dB per  
octave Butterworth aligned crossover modules. Additional crossover  
frequency modules are available from your Authorized Rockford  
Fosgate Dealer.  
Note: The factory default setting is Full Range.  
CROSSOVER FREQUENCY SETTINGS  
To change the crossover mode, remove the crossover module from  
the housing. Rotate the module to the desired setting and gently push  
the module back into the amplifier housing as shown on the diagram  
on the back of the amplifier.  
Example: The 2600x is shipped with a 100Hz module. With the  
module in the Full Range setting, the amplifier will pass through all  
20Hz - 20kHz frequencies.  
In the Low-Pass setting, only those frequencies below 100Hz will  
pass through the amplifier.  
In the High-Pass setting, only those above 100Hz will pass through  
the amplifier.  
– 10 –  
W IRING DIAGRAMS - 2300 / 2600X  
Source Unit  
Left  
Right  
Power  
Left GND Right  
High Level Inputs  
Gain  
*Xover Module  
(2600x only)  
Full Range Position  
2 3 0 0  
2 6 0 0 x  
Series 1  
R +  
L +  
+
+
4(2min.)  
Right Full Range  
4(2min.)  
Left Full Range  
*See page 10 for proper crossover use.  
2300/2600X BASIC SYSTEM  
– 11 –  
Source Unit  
Left  
Right  
Power  
Left GND Right  
High Level Inputs  
Gain  
*Xover Module  
(2600x only)  
Full Range Position  
2 3 0 0  
2 6 0 0 x  
Series 1  
R +  
L +  
MX  
MX  
TX  
TX  
+
+
+
+
4Ω  
Tweeter  
4Ω  
Tweeter  
Left Midrange  
Right Midrange  
6.6mH Coil  
+
4Subwoofer  
*See page 10 for proper crossover use.  
2300/2600X 3-WAY STEREO/MONO SYSTEM  
– 12 –  
Source Unit  
Left  
Right  
Left GND Right  
Power  
Amp 1  
High Level Inputs  
Gain  
High Pass  
2
6
0
0 x  
Series 1  
R +  
L +  
MX  
MX  
TX  
TX  
+
+
+
+
4  
Right Mid-Woofer  
4Ω  
Left Mid-Woofer  
Tweeter  
Tweeter  
Left  
Right  
Left GND Right  
High Level Inputs  
Gain  
Power  
Amp 2  
2
6
0
0 x  
Series 1  
R +  
L +  
+
See page 10 for  
proper crossover use.  
4Subwoofer  
2600X 3-WAY BI-AMPLIFIED SYSTEM  
– 13 –  
W I RI N G D I AG RAM S - 4 6 0 0 X  
The following pages show some examples for wiring the Series 1 4600x  
amplifier to your vehicle's speaker system.  
4(2min.)  
Right Mid-Woofer  
4(2min.)  
Right Mid-Woofer  
+
+  
Source Unit  
LEFT  
RIGHT  
POWER  
LEFT  
RIGHT  
LEFT GND RIGHT LEFT GND RIGHT  
HIGH LEVEL INPUTS HIGH LEVEL INPUTS  
GAIN  
GAIN  
FRONT  
FRONT  
FRONT  
CROSSOVER  
REAR  
CROSSOVER  
4
6
0
0 x  
Series 1  
+ R  
+
L
R +  
L
+
+
+
4(2min.)  
Left Full Range  
4(2min.)  
Right Full Range  
See page 10 for proper crossover use.  
4600X FRONT/REAR FADING  
FULL RANGE SYSTEM  
– 14 –  
4(2min.)  
Right Mid-  
Woofer  
4(2min.)  
Left Mid-  
Woofer  
Tweeter  
Tweeter  
+
+
+
+  
TX  
TX  
Source Unit  
LEFT  
RIGHT  
POWER  
LEFT  
RIGHT  
LEFT GND RIGHT LEFT GND RIGHT  
HIGH LEVEL INPUTS HIGH LEVEL INPUTS  
GAIN  
GAIN  
FRONT  
FRONT  
FRONT  
CROSSOVER  
REAR  
CROSSOVER  
4
6
0
0
Series 1  
x
+ R  
+
L
R +  
L
+
B r i d g e d  
+
4Subwoofer  
See page 10 for proper crossover use.  
4600X 3-WAY MULTI-CHANNEL  
STEREO/BRIDGED MODE  
– 15 –  
Source Unit  
LEFT  
RIGHT  
POWER  
LEFT  
RIGHT  
LEFT GND RIGHT LEFT GND RIGHT  
HIGH LEVEL INPUTS HIGH LEVEL INPUTS  
GAIN  
GAIN  
FRONT  
FRONT  
Front Crossover  
Rear Crossover  
Rear  
Front  
Xover Module  
Low-Pass Position  
Xover Module  
Low-Pass Position  
4 6 0 0 x  
Series 1  
+ R  
+ L  
R +  
L +  
B r i d g e d  
B r i d g e d  
+
+
4Subwoofer  
4Subwoofer  
See page 10 for proper crossover use.  
4600X 2 CHANNEL BRIDGED  
LOW PASS  
– 16 –  
TR O U BL E SH O O T I N G  
This troubleshooting guide is intended to assist you with certain  
problems which may occur. If you still encounter problems, see your  
Authorized Rockford Dealer for assistance.  
Problem  
Amplifier will not play Remote Turn-on light is off.  
Solution  
1. Check the DC voltage at the amplifiers B+ terminal with a  
voltmeter. The voltage should measure between 11.5V - 15.5V.  
If voltage is not found, check the battery, fuse, fuse housing and  
wire connections. Fix, repair, or replace accordingly.  
2. If the amplifier still does not play, check the voltage at the  
amplifiers remote turn-on lead. The voltage should measure  
between 11V - 15V.  
a. If voltage is above or below the prescribed measurements,  
checkforproperconnectionsand have the head unitchecked  
by an Authorized Dealer or Service Center.  
b. If the remote turn-on current draw from the head unit is  
connected to multiple amps and/or electronics, the current  
draw may be too great. Check for proper connections. (Use  
a relay to suppress the excessive current draw.)  
Problem  
Amplifier will not play Remote Turn-on light is on:  
Solution  
1. Unplug the head unit and test the amplifier with another working  
source unit (i.e., bench-test radio, walkman, etc.). If the amplifier  
plays, check the in-dash leads for cuts, breaks and/or shorts.  
2. Ifthe amplifierstilldoesnotplay, disconnectthe existingspeakers  
and connect a set of test speakers to the output of the amplifier  
(any type of speaker will do - i.e., simple home box type,  
bookshelf, raw speaker, etc.). If the amp plays, check for shorts  
or blown voice coils in the vehicles speaker system.  
–17 –  
Problem  
Amplifier gets too hot.  
Solution  
1. Be sure the amplifier is properly mounted. You should be able  
to place your hand a few inches above the amplifier housing and  
feel the heat rising when the unit is on.  
Hot air rises. Consequently mount the amplifier with the heatsink  
fins aligned vertically. This allows the air to flow freely, carrying  
away the heat. Check to see that the heatsink fins are free of any  
obstruction (i.e., carpet, seats, etc.).  
2. If #1 does not solve the problem, check to see that the impedance  
of the overall system is not less than 2stereo or 4bridged/  
mono. Using an AC impedance meter (such as the Perfect  
Interface IM-1), sweep from 20 Hz-20 kHz, and look for dips  
below 2.  
Be sure to test the bass region (20 Hz - 150 Hz) of your system.  
If the amplifier is bridged to those speakers, the load the amp sees  
is one-half (1/2) of the reading on the AC impedance meter.  
If the impedance level is below 2, check for a bad speaker and/  
or crossover, proper usage of passive crossovers or shorted wires,  
or try rewiring the entire system.  
Problem  
Amplifier noise (Turn-On Pop)  
Solution  
1. Disconnect the RCA plugs from the amplifier and recheck the  
amp by turning it on and off with the source unit. If turn-on pop  
goes away, connect a delay turn-on module (Perfect Interface  
DT-1) to the amplifier. See your Authorized Rockford Fosgate  
Dealer for more information.  
2. If the noise persists, disconnect the turn-on wire from the head  
unit and use a different +12 volt power source to turn on the  
amplifier (i.e., battery direct). If the noise is gone, use a relay to  
switch +12 volts auto power from the clean power source.  
– 18 –  
Problem  
Engine Noise (Whine)  
Solution  
1. Disconnect the speakers from the amplifier. Connect a test  
speaker to the amplifier output terminals. If the noise goes away,  
check your speaker leads, speakers and crossovers.  
2. If the noise persists, use a shorting plugto mute the input signal  
at the amplifier. If the noise goes away:  
a. Bypass all of the other equipment (i.e., crossovers and  
equalizers) and connect the head unit directly to the amp. If  
the noise disappears, reconnect the equipment one piece at  
a time, being sure to test for noise after each piece is installed.  
Logic indicates that the last unit installed when the noise  
returns is the culprit. Refer to the units owners manual for  
more information.  
b. If the noise persists, run a new RCA line from your head unit  
to the amplifier. If there is no noise, replace the RCA cable.  
c. If the noise is still present after replacing the RCA cable, run  
the RCA cable on a different route.  
d. Isolate the grounds on the head unit so that there is only one  
grounding point. If the noise disappears, install the radio,  
using only one (1) grounding point. Isolate the radio chassis  
from the grounding on the dash, and use an antenna ground-  
ing loop isolator on the antenna.  
If noise persists, see your Authorized Rockford Fosgate Dealer.  
– 19 –  
DYNAM IC PO W ER MEASUREM ENTS  
About the Dynamic Power Measurements  
The Audio Graph PowerCube is a test instrument used to measure the  
output of an amplifier. It makes measurements in accordance with IHF-  
202 standards. The IHF-202 standard is a Dynamic power measurement.  
It was developed as a means of measuring power in a manner that best  
represents the Real World operation of an amplifier. Many manufactur-  
ers, including Rockford Fosgate, at times will measure amplifier power  
into a fixed resistor (4 Ohm, 2 Ohm). While this method is useful in some  
types of evaluation and testing, it is not representative of an amplifier that  
is hooked up to a speaker and playing music.  
Music  
Music is dynamic; sound waves are complex and constantly changing. In  
order to simulate this, the IHF-202 standard calls for the input signal to the  
amplifier to be a 1kHz bursted tone. This signal is input (on) for a short  
period of time and then off for a restedperiod. The signal is gradually  
increased in leveluntilthe amplifiersoutputexceeds1% TotalHarmonic  
Distortion (THD). At 1%, distortion becomes audible therefore, any  
power produced above that level is considered unusable. Many manu-  
facturers represent their amplifiers output power in excess of 10%  
distortion. They use many names for the measurement, such as Total  
Maximum Power or Maximum Output Power. This is not indicative of the  
actual usable output power.  
Listening to Loudspeakers - Not Resistors  
A loudspeaker is not a resistor. A resistors value (resistance) is fixed. A  
loudspeakers impedance is dynamic. It is constantly changing in value,  
dependent upon the frequency of the input signal. Therefore, measuring  
power with the amplifier loaded to a 4 Ohm resistor is not the same as  
measuring power with the amplifier hooked to a 4 Ohm speaker. Most  
people do not listen to music through a resistor.  
A 4 Ohm speaker may experience a drop in impedance 4-6 times lower  
than its nominal (printed) impedance. A speaker will also cause phase  
shifts in the signal that is passed through it. These phase shifts happen  
because a speaker is an inductor (voice coil), a capacitor (compliance of  
the surround/spider), as well as a resistor (voice coil wire).  
To simulate a speaker the Audio Graph PowerCube measures output  
power into 20 different loads. It tests at 8 Ohms, 4 Ohms, 2 Ohms and  
1 ohm. Each of these impedances is also tested at -60°, -30°, 0°, +30°  
and +60° phase angles. These different impedances and phase angles  
represent the shifts in impedance and phase that can occur in a typical  
loudspeaker.  
Appendix A  
– 20 –  
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 for each  
impedance at each phase angle.  
AudioGraph The PowerCube  
Amplifier: Series 1 4600x  
Serial No : PHASE 1  
Rated Power:  
30 V at 4 ohms  
Owner  
:
ROCKFORD CORPORATION  
What is an Amplifier?  
An amplifier by definition is a voltage generating device, recreating the  
signal input which is identical but in a larger or amplified form. It will be  
connected to a reactive load (the speaker). The impedance of this load  
and the phase of the signal passing through the load will vary, dependent  
upon the frequency and amplitude of the input signal (music).  
Therefore, a perfect amplifier will be able to maintain the same output  
voltage regardless of load characteristics and will not alter the signal it is  
reproducing. A perfect amplifier when measured by the Audio Graph  
PowerCube would present data that forms a perfect cube. Unfortunately,  
amplifiersare notperfect. The lawsofphysicsgenerallypreventit. Agreat  
amplifier is about the best one can hope to attain.  
Asyou can see bythe PowerCube and asyou willexperience bylistening,  
your Series 1 amplifier is a GREAT AMPLIFIER!  
– 21 –  
W ARRAN T Y IN FO RM AT I O N  
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 the seals and/or serial number have been broken, removed, tampered  
with, defaced or altered in any manner. This warranty applies only to the original  
consumer/purchaser and is not transferable.  
Electronics found to be defective during the warranty period will be repaired or  
replaced at Rockford Fosgates discretion. Repaired or replaced electronics will  
be covered by the balance of the original warranty period only. Rockford Fosgate  
shall not be responsible for any incidental or consequential damages resulting  
from a defect in electronics. Some states do not allow the exclusion or limitation  
of incidental or consequential damages, so the previous limitation may not be  
applicable.  
The warranty does not cover any appearance item, any cost or expense related to  
the removal or reinstallation of the product, any accessory used in conjunction  
with the product, damage to the product resulting from alteration, accident,  
misuse or abuse, or improper installation. This warranty does not apply if the parts  
or labor, which would otherwise be provided without charge under this warranty,  
are obtained from any source other than Rockford Fosgate or an Authorized  
Rockford Fosgate Service Center.  
This warranty is the only express warranty and does not create any implied  
warranties. Rockford Fosgate limits its obligations under any implied warranties  
under state laws to a period not to exceed the written warranty period. Some states  
do not allow limitation on how long an implied warranty lasts, so the above  
limitation maynotapply. Thiswarrantyappliesonlyto productssold in the United  
States of America or its possessions. For warranty outside the U.S.A., please  
contact the nearest Authorized Rockford Fosgate Dealer. This warranty gives the  
consumerspecific legalrights, and the consumermayhave otherrightswhich vary  
from state to state.  
A defective product must be shipped prepaid to the Authorized Rockford Fosgate  
Dealer from which the consumer purchased the product or to the Rockford  
Fosgate factoryin Tempe, Arizona in the originalfactorycarton orequivalent. Any  
shipping loss or damage will be borne by the consumer or the consumers shipper.  
A consumer returning a product to the factory must call (800) 669-9899 for a  
Return Authorization Number. All shipments shall be clearly marked with the  
Return Authorization Number on the outside of the shipping carton.  
Ship to:  
Rockford Corporation  
Warranty Repair Department  
2055 E. 5th Street  
Tempe, AZ 85281 U.S.A.  
Return Authorization Number: ____________________________  
– 22 –  
N O T E S  
N O T E S  
Rockford Fosgate  
A Division of 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) 421-487-877  
REV. C 1/94  
MAN-0191  

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