MEMPH′s - Memphis Car Audio
MEMPHIS
PRODUCT MANUAL & INSTALLATION GUIDE
1 POWER REFERNCE |
MULTI CHANNEL: PRX300.4 // PRX700.5
SINGLE CHANNEL: PRX300.1//PRX500.1//PRX1000.1//PRX1500.1
(Y) MEMPHIS Pa
READY TO TURN IT UP? READ THIS FIRST!
Memphis Audio built a 50 year legacy in the audio industry engineering the highest quality products to produce
the best possible listening experience for our fans and loyal supporters. To fully appreciate our products we
recommend taking the time to read and follow the instructions in this manual. As always, we recommend all
installations and service be performed by an authorized Memphis Audio dealer.
For optimal performance, Memphis recommends using only Memphis Connection accessories. wt
your system with properly sized Memphis Connection wire and accessories will dramatically boast your
listening experience and increase the durability of your Memphis Audio products.
Power Reference amplifiers feature a MOSFET powersupply with a 12dB per octave crossover to ensure the most
accurate musical reproduction. 1Q) stability on mono block models & 45 Hz Bass Boost on all models will make your
system perform to its full potential for all types of music.
9
IRR Check out our full line of Power Reference speakers and woofers to create a complete Memphis
Street Reference system in your ride.
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Muiti Channel: PRX300.4 // PRX700.5
« Black textured heatsink with injection molded end plates
- Variable Bass Boost (0-12dB) centered at 45Hz
* High level speaker inputs (PRX300.4)
* Fully variable high & low pass crossovers
* Protection circuitry against overload, short circuit, thermal & reverse polarity.
Single Channel: PRX300.1 // PRX500.1 // PRX1000.1 // PRX1500.1
« 10) MONO stability (All but PRX300.1)
« Low Level bypass outputs
« Variable bass boost (0-12dB) centered at 45Hz
* 12dB Infrasonic Filter
* High level speaker inputs
* Fully Variable low pass crossover
* Protection circuitry against overload, short circuit, thermal 6 reverse polarity.
Platinum Plated Connectors
Ensures solid electrical connections that resist corrosion.
Fully Variable High 6 Low Pass Crossovers
Fully variable crossovers promote installation ease and save the cost of outboard crossovers. The l2dB per octave
slope offers steep roll-off above/below the selected frequency.
Protection Circuitry
Protects against overload, short circuit, thermal and reverse polarity. These protection features are designed to
protect the amplifier from misuse as well as from common causes of amplifier failure.
LED Light
Blue light indicates that the amplifier is working normally. If the light is not illuminated or glowing red please
consult the troubleshooting section of the manual.
Specifications
(AIR! (EA PENSE | LE CANES
*Features and Specifications are subject to change without notice.
Please consult with your local authorized dealer if you experience issues with your unit. You may also contact
Memphis Audio customer service at 800-489-2300 or email tech support directly at: techsupport@memphis-
caraudio.com. Do not attempt to return your amplifier directly to us without first calling for a Return Authorization
number. Units received without an accompanying Return Authorization number will be processed more slowly.
Additionally, you must include a copy of your purchase receipt from an authorized dealer for consideration of
in-warranty service, otherwise repair charges will apply. Units received without a receipt will be held for up to 30
days allowing us time to contact you and obtain a copy of the receipt. After 30 days all units will be returned to you
unrepaired.
Installation Information
Memphis Audio recommends the installation of our products to be performed by an Authorized dealer. Attempting
an installation project on your own or through an unauthorized source may result in damage to your products and
may potentially void your warranty.
Amplifiers are generally mounted in the hatch/trunk area of your car or SUV or behind the seat of most pick up
trucks. Select a location that provides adequate ventilation. Avoid mounting the amplifier with fins facing down.
Amplifier should be secured using the screws provided.
For your safety, always inspect the mounting location carefully to ensure you are not drilling into any electrical,
hydraulic, fuel or fluid lines. Always check your speaker load with a multi-meter before connecting the amplifier.
Connecting any speaker load lower than the rated impedance of the amplifier will result in damage to the amplifier.
Damage of this nature is NOT covered under warranty. Please pay close attention to what connections are made to
the amplifier.
Ша If you are uncertain or uncomfortable proceeding with your installation, please contact your local
authorized Memphis Audio Dealer
Troubleshooting
When troubleshooting your amp, speaker and speaker wires should be tested first.
No Output:
« Confirm all wiring is firmly connected.
Both +12V and REM terminals must have +12 Volts present and GND must be connected to chassis’ ground or to
the negative battery terminal.
- Confirm the signal source is connected and supplying an output signal. To confirm the amp is working, connect
an RCA patch cord to the line inputs of the amplifier (do not connect the other end of the patch cord). Briefly tap
the center pin of each disconnected RCA with your finger. This should produce a noise (brief static or hum] in
the speakers.
« If the amp is hot, check the speaker impedance or load. The total minimum impedance of all speakers should
not be lower than the rating of the amp.
Only One Channel Works:
« Confirm the speaker terminal strip connections are firmly connected.
* Check “balance” control on your signal source.
* Tf using RCA Low-Level inputs, reverse the input plugs at the amplifier. If the channel that is silent reverses
position, the problem is in the source unit or connecting cable.
Weak Output
* Check input sensitivity control adjustment.
Unwanted Noise
* Whine that increases and decreases with engine speed - confirm the Amp & Source unit are grounded properly.
* Clicking or popping noise at a rate that follows engine speed - this is often induced by the vehicles ignition system.
Confirm that the vehicle is equipped with resistor spark plugs and wires. The ignition system may need service.
«Noise can be caused by routing speaker input wires too close to the light wires and other accessory wires in the
vehicle. Re-route wires to avoid unwanted interference.
* Tf above steps do not improve/reduce noise, the system should be checked by a professional audio installer at a
Memphis Authorized Dealer.
Red LED is Illuminated
* Speaker or wire is shorted * Battery voltage too low
* Battery voltage too high * Amplifier has overheated due to improper ventilation
Power Supply Connections
Install the fuse at the battery last!
Use conventional stranded copper wire for all connections. Finish the ends of the wires at the amp and vehicle with
proper size terminals. Poorly made connections and/or inadequate wire size will generate excessive heat and may
lead to equipment failure.
12 Volt + Connection
make the 12V+ connection directly at the positive battery post using the proper wire size and fuse listed below, The
fuse should be installed within 18” of the battery. This fuse is vital to protecting the vehicle from damage in the case
of a dead short. The fuse value at the battery should be at least equal to the total fuse value ofa Il the amplifiers
being used.
| Model Amp Kit Fuse Value Model Amp Kit Fuse Value
PRX3004 17-8GKIT BOA PRX500.1 17-86KIT BOA
PRX700.5 17-4GKIT 150A PRX1000.1 17-46KIT 150A
PRX300.1 17-8GKIT BOA PRX1500.1 17-4GKIT 150A
Ground Connection:
Make ground connection directly to the chassis of the vehicle as close to the amp as possible. Make sure this
connection is made with the same wire size as used for the 12 volt connection. Ensure that all dirt, grease, paint and
coatings are removed prior to attaching the ground wire to chassis.
Remote Turn On
Remote turn on should be connected to the source unit's remote turn on lead or power antenna output wire. When
using the power antenna wire, make certain it does not lose power when any source other than the radio is selected.
Power Connections
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End Panel Connections
High Input: Use this connection method when feeding the amplifier with a high-level speaker input from a factory
radio or OEM amplifier.
Low Level Output: (MONO Amps) Use this output connection to feed the audio signal to additional amplifiers.
Remote: (all models) Use only “PRX” Remotes for this amplifier model. The adjustment will increase/decrease the
output level of the amplifeir. The remote controller only operates the rear channels of the PRX300.4 and only the
subwoofer channel of the PRX700.5.
Input Mode Switch: (PRX700.5/PRX300.4) Place the switch on the number of audio inputs being used. If 2CH or 4CH
is selected on the PRX700.5, the subwoofer channel will be provided.
Setup And Adjustment
Gain
The gain control is NOT a volume control. The gain control adjusts the amount of signal required to drive the
amplifier to full output. With the gain at full clockwise rotation, less signal voltage is required to drive the amp to
full output. With the gain at full counter clockwise rotation, more signal voltage is required to drive the amp to full
output. For optimal performance, set the gain control to minimum
High Pass Filter (HPF)
The high pass crossover/filter is designed to remove low frequency information from a speaker. This is generally
used to protect smaller devices from trying to reproduce low frequency information that might damage them. The
crossover frequency is adjustable from 50 Hz to 1KHz and uses 12 dB per octave slope. To engage the HPF simply
slide the switch to the position on the marked HPF. Crossover frequency selection is made by rotating the dial:
clockwise raises the frequency, counter-clockwise lowers the frequency. Most mid-bass or midrange drivers should
be set between 80 and 400 Hz depending on how high the subwoofer(s) plays. For mid-range drivers that are 5” or
smaller we suggest setting the HPF to 120Hz. The HPF can also be combined with passive crossovers on a separate
or coaxial speaker set to provide low frequency protection to the midrange driver, or to form band-pass filter for a
midrange speaker already using a passive low-pass filter.
Low Pass Filter (LPF)
The Lowpass crossover/filter is designed to remove high frequency information from a speaker. This is generally
used to prevent mid bass speakers or subwoofers from trying to reproduce mid and high frequency information that
they are not designed to reproduce. The crossover frequency is adjustable from 30Hz to 250Hz and uses a 12dB per
octave slope. To engage the LPF slide the switch to the position marked LPF. Frequency selection is made by rotating
the dial: clockwise raises the frequency and counter clockwise lowers the frequency. Most subwoofers should be
set between 80Hz and 100Hz depending on how low the mid-bass or midrange drivers are capable of playing.
Full Range
Sliding the selector switch to this position turns off all crossovers and allows a full range signal to pass. The flat
position should be selected when using outboard electronic crossovers.
Signal Input Connections
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Wiring Multi-Channel Amps
Speaker have a positive and negative marking on the terminals. These are used to indicate polarity and must be
considered when wiring speakers or subwoofers to an amplifier. Amplifiers also have positive and negative
markings on their speaker outputs. Use these marking to match polarities to ensure the speakers are in phase.
Failure to wire speakers or woofers in phase with one another will result in a loss of bass. All street reference
amplifiers require a minimum 2o0hm impedance in stereo or 4 chms in mono (bridged) mode.
Always check your speaker load with a multi-meter before hooking them up to the amplifier. The
PRX300.4 amplifier is stable to 2 ohms stereo or 4 ohms bridged mono. The PRX700.5 amplifiers are
stable to 2 ohms stereo or 4 ohms bridged mono (front 6 rear channels) and stable to 2 ohms (sub
channel). Any Impedance (load) smaller than what is recommended will damage the amplifier! Such
damage is not covered under warranty, so pay strict attention to what connections are made to the amplifier.
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WIRING SUBWOOFERS
When using a single amplifier to power one subwoofer, the positive and negative terminal of
the subwoofers voice coil is connected the positive and negative terminal of the Amplifier.
Always check your speaker load with a multi-meter before hooking up to the amplifier. The
PRX1.500, PRX1.1000, PRX1.1500 amplifiers are 1 ohm stable. Any Impedance (load) smaller than 1
А ohm will damage the amplifier! Such damage is not covered under warranty, so pay strict attention
to what connections are made to the amplifier.
SET UP AND ADJUSTMENT
Sensitivity The sensitivity control is NOT a volume control. The sensitivity control adjusts the amount of signal
required to drive the amplifier to full output. With the sensitivity at maximum (full clockwise rotation), less
signal voltage is required to drive the amp to full output. With the sensitivity at minimum (full counter-clockwise
rotation), more signal voltage is required to drive the amp to full output.
Low Pass Filter (LPF) The low pass crossover, or filter, is designed to remove high frequency information from a
subwoofer.This is generally used to prevent mid-bass speakers or subwoofers from trying to reproduce mid and
high frequency information that they are not designed to reproduce. The crossover frequency is adjustable from
90Hz to 180Hz, and uses a 12dB per octave slope. Frequency selection is made by rotating the dial; clockwise
raises the frequency and counter-clockwise lowers the frequency. Most subwoofers should be set between 80
and 100Hz, depending on how low the mid-bass or midrange drivers are capable of playing.
Bass Boost (45Hz) Boost should be used with discretion, keeping in mind that electronically enhanced boost
places an additional load on the amplifier and the speakers they are connected to. This control is fully variable
from 0 - 12dB.
Infrasonic Filter This filter is fully variable from 20Hz-50Hz and removes unwanted frequencies below the
frequency selection. This filter is most useful with subwoofers loaded in a ported enclosure, which helps prevent
unloading (rapid loss of power handling below the port tuned frequency).
|
Memphis Audio Power Reference Amplifier Limited Warranty
This product has a one year warranty from the date of purchase for defects in material or workmanship. This
warranty will be extended to 2 years when installed by a Memphis authorized dealer using Memphis Connection
products. The warranty is void if the product has been physically damaged by improper usage or abuse. If
repairs are attempted outside of a Memphis Audio facility, the warranty is void.
This warranty is limited to the original retail purchaser and does not cover any expenses incurred in the removal
or re-installation of the product. This warranty does NOT apply to product exterior and cosmetics. Memphis Audio
disclaims any liability for incidental or consequential damages caused by product defects. Memphis Audio liability
will not exceed the purchase price of the product and the warranty period specified.
What is NOT covered under warranty
- Damage due to improper installation
- Damage caused by exposure to moisture, excessive heat, chemical cleaners and/or UV radiation
- Damage through negligence, misuse, accident or abuse. (Repeated returns for the same damage may be abuse)
* Product damaged in accident and/or due to criminal activity
* Service performed by anyone other than Memphis Audio
- Subsequent damage to other components
- Any cost or expense related to the removal or re-installation of product
* Products with tampered, missing , altered or defaced serial numbers/labels
* Freight damage
-The cost of shipping product to Memphis Audio
- Return shipping on non-defective items
- Any product not purchased from an authorized Memphis Audio dealer
Some states do not allow the exclusion or limitation of incidental or consequential damages. The above limitations
or exclusions may not apply to you. This warranty gives you specific rights, you may have other rights which vary
from state to state.
If warranty service is required, a return authorization number is required to return the product to Memphis Audio.
Warranty shipments to Memphis Audio are the responsibility of the purchaser. Pack the product carefully in the
original carton if possible Memphis Audio will not be responsible for damages incurred in shipment or due to
improper packaging materials used by the purchaser.
If determined to be within warranty your product will be repaired or replaced at the discretion of Memphis Audio.
MEMPHIS
CONTACT INFO
122 GAYOSO AVE, MEMPHIS TN 38101 TECH SUPPORT 800-903-6979
SHOW US YOUR INSTALL & FOLLOW US TODAY!
CE] WWW MEMPHISCARAUDIO.CON f AMEMPHISCARAUDIO [=] RMEMPHISCARAUDIOUSA
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