Memphis 16-PR2.100, 16-PR2.50, 16-PR2.75, 16-PR4.50 Owner's Manual

Models : 16-PR2.50

16-PR2.75

16-PR2.100

16-PR2.150

16-PR4.50 by MEMPHIS

Where You Headed?

Thank you for choosing Memphis Car Audio! Your choice of Memphis Car Audio indicates a desire for high quality music reproduction in the automobile. Memphis Car Audio brings to you over four decades of car audio expertise. So whether you are a daily driving music lover, or a serious car audio competitor, Memphis Car Audio has the product for you!

To take full advantage of the Memphis Car Audio gear you have just purchased, please read and follow the instructions in this manual. As with all of our products, professional installation by an authorized Memphis Car Audio dealer is highly recommended! Otherwise, the performance of your new gear may not be satisfactory. In addition to the installation services and expertise offered by an authorized Memphis Car Audio dealer, the warranty of this product may be extended when installed by an authorized Memphis Car Audio dealer.

Be sure and ask your Memphis dealer about the MECP extended warranty program as well.

You're Headed in the Right Direction with Memphis Car Audio!

INTRODUCTION

The Memphis Car Audio Power Reference Series amplifiers offer high quality audio reproduction for the audiophile and the everyday listener a like. Full Mosfet design and

12dB per octave crossovers ensure accurate musical reproduction. All models feature fully variable crossovers with 12dB per octave slopes, allowing you the ability to tailor the sound to best fit the speakers and your listening preferences.

When combined with the Power Reference Subwoofers powered by one of our Power

Reference Class D amps, you have a complete mobile reference system. To further enhance your listening enjoyment, Memphis Car Audio also offers a wide range of signal processors as well.

STANDARD FEATURES FOR ALL 2 AND 4 CHANNEL MODELS

• 2ohm Stereo Stable / 4ohm Mono

• High & Low Level Inputs

• 9 dB bass boost all models (PR2.150 has variable boost)

• Bridgeable & Tri-Mode Operation

• Fully Variable High & Low Pass Filters

• Protection Circuitry Against Overload, Short Circuit, Thermal, and Reverse Polarity

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Bridgeable & Tri-Mode Operation Memphis Car Audio Power Reference amplifiers can be used in stereo, bridged, or tri-mode operation. Tri-Mode operation means that a pair of speakers are wired in the conventional stereo manner, while a subwoofer is simultaneously connected to the bridged terminals of the same two channels. This is useful for simple 2channel systems that require a subwoofer in addition to the fullrange speakers.

Platinum finish connections Ensures solid electrical connections that resist corrosion.

Fully Variable High & Low Pass Crossovers Fully variable crossovers promote installation ease and save the cost of outboard crossovers. Additionally, they may be used in conjunction with outboard passive or active crossovers, depending on the complexity required by the system. The 12dB per octave slope offers steep roll-off above or below the selected frequency.

Protection Circuitry 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.

What does the little blue light mean? It means that the amplifier is on, and should be working normally. If the light is not illuminated, then please consult the trouble shooting section of this manual.

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INSTALLATION

Professional installation by an authorized Memphis Car Audio dealer is highly recommended!

Otherwise, the performance of your new gear may not be satisfactory. In the event that you decide to do your own installation, please read and follow this manual very carefully. Failure to do so may compromise the integrity of this product, your automobile, and possibly void the product warranty.

Amplifiers are generally mounted in the hatch/trunk area of a car or SUV, and under or behind the seat of most pick up trucks. Select a location that will provide adequate ventilation for the amplifier. Avoid mounting the amplifier with the fins facing down. The fins should be facing up, either vertically or horizontally. Secure the amplifier with the screws provided.

WARNING!

Before securing the amplifier, inspect the mounting location carefully to ensure that you do not drill into or damage any electrical, hydraulic, fluid, or fuel lines.

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PR 2.50

HIGH INPUT L

GAIN LPF OFF - BOOST - ON

X - OVER

HPF PROT PWR

R

LOW INPUT MIN MAX 40Hz 400Hz

LPF

FULL

HPF

40Hz 400Hz

REMOTE

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

PR 2.75

HIGH INPUT

L

GAIN LPF OFF - BOOST - ON

X - OVER

HPF PROT PWR

R

LOW INPUT MIN MAX 40Hz 400Hz

LPF

FULL

HPF

40Hz 400Hz

REMOTE

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

PR 2.100

HIGH INPUT L

R

LOW INPUT

GAIN LPF OFF - BOOST - ON

X - OVER

HPF

MIN MAX 40Hz 400Hz

LPF

FULL

HPF

40Hz 400Hz

PROT PWR

REMOTE

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

PR 2.150

HIGH INPUT L

R

LOW INPUT

GAIN LPF OFF - BOOST - ON

X - OVER

BASS

BOOST PROT PWR

REMOTE

MIN MAX 40Hz 400Hz

LPF

FULL

HPF

6dB 18dB

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

PR 4.50

1CH

HIGH INPUT

3CH

GAIN

X - OVER

X - OVER GAIN

OFF - BOOST - ON

X - OVER

X - OVER PROT PWR

2CH

LOW INPUT

4CH

MIN MAX

LPF

FULL

HPF

40Hz

CH 1/2

400Hz MIN MAX

LPF

FULL

HPF

40Hz

CH 3/4

400Hz

REMOTE

1CH

SPEAKER

2CH

BRIDGED

3CH

SPEAKER

4CH

BRIDGED

GND

POWER

REMOTE +12V

FUSE

5

POWER SUPPLY CONNECTIONS

WARNING!

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 connection with the proper size terminals. Poorly made connections, and /or inadequate wire size will generate excessive heat and may lead to equipment failure.

The 12 VOLT + connection should be made directly at the positive battery post, using the wire size recommended below, and fused within "18"of the battery. This fuse is vital, and is primarily intended to protect the vehicle from damage in case of a dead short. The fuse value at the battery should be at least the total fuse value of all of the amplifiers being used.

Model

PR2.50

PR2.75

PR2.100

PR2.150

PR4.50

Wire

Gauge

8

8

8

8

8

Fuse

Value

30A

40A

50A

80A

60A

The GROUND connection should be made directly to the chassis of the vehicle, as close to the amp as possible. Make this connection with the same wire size as used for the 12 Volt+ connection. Ensure that all dirt, grease, paint, and coatings are removed from around the connection to the vehicle chassis. Use of a nut, bolt, and toothed type washer is recommended for attaching the ground wire to the chassis.

The REMOTE TURN ON terminal should be connected to the source units' remote turn on lead or power antenna output wire. When using the power antenna wire, make certain that this wire does not lose power when any source other than the radio is selected.

Fig.1

Remote Turn ON

To Power Antenna FUSE Holder

+

Near Battery

BATTERY

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SIGNAL INPUT CONNECTIONS

The RCA jack(s) marked 'IN' should be connected to the low level outputs of your source unit or signal processor. High-level (speaker level) inputs are provided as well.

L CH (+) WHITE

R CH (+) GRAY

CHASSIS GROUND BLACK

PR 2.50

HIGH INPUT

L

GAIN LPF OFF - BOOST - ON

X - OVER

HPF PROT PWR

R

LOW INPUT MIN MAX 40Hz 400Hz

LPF

FULL

HPF

40Hz 400Hz

REMOTE

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

2 CH (+) GRAY 4 CH (+) VIOLET

1 CH (+) WHITE

CHASSIS GROUND BLACK

3 CH (+) GREEN

40Hz 400Hz

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SPEAKER CONNECTIONS

Most speakers have a positive (indicated with a + or colored dot) and negative (indicated with a -) marking on the terminals. These are used to indicate polarity, and must be considered when wiring stereo speakers or multiple subwoofers to an amplifier. Amplifiers also have positive and negative markings on their speaker outputs. These may be used to correspond or match with the speaker polarity markings to ensure that the stereo speakers are in-phase with each other. Failure to wire stereo speakers in phase with one another will result in a loss of bass. All Power Reference Class AB amps require a minimum 2ohm impedance in stereo or 4 ohms in mono (bridged) mode.

1. 2CH MODELS(16-PR2.50/16-PR2.75/16-PR2.100/16-PR2.150) a. STEREO MODE

L

SPEAKER

R GND

POWER

REMOTE +12V

HIGH INPUT

L

R

LOW INPUT

GAIN LPF OFF - BOOST - ON

X - OVER

HPF PROT PWR

MIN MAX 40Hz 400Hz

LPF HPF

FULL 40Hz 400Hz

REMOTE

BRIDGED

FUSE b. MONO MODE

HIGH INPUT L

R

LOW INPUT

GAIN LPF OFF - BOOST - ON

X - OVER

HPF PROT PWR

MIN MAX 40Hz 400Hz

LPF

40Hz 400Hz

REMOTE

R +

L +

L

SPEAKER

R

BRIDGED

GND

POWER

REMOTE +12V

FUSE

L +

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2. 4CH MODEL(16-PR4.50) a. 4CH MODE

+1CH

PR 4.50

1CH

HIGH INPUT

3CH

GAIN

X - OVER

X - OVER

OFF - BOOST - ON

GAIN

X - OVER

X - OVER PROT PWR

REMOTE

2CH

LOW INPUT

4CH

MIN MAX

LPF

FULL

HPF

40Hz

CH 1/2

400Hz MIN MAX

LPF

FULL

HPF

CH 3/4

40Hz 400Hz

1CH

SPEAKER

2CH

BRIDGED

2CH+

3CH

SPEAKER

4CH

BRIDGED

4CH+

GND

POWER

REMOTE +12V

FUSE

+3CH b. 3CH MODE

+1CH

PR 4.50

1CH

HIGH INPUT

3CH

OFF - BOOST - ON

GAIN

X - OVER

X - OVER GAIN

X - OVER

X - OVER PROT PWR

REMOTE

2CH

LOW INPUT

4CH

MIN MAX

LPF

FULL

HPF

40Hz

CH 1/2

400Hz MIN MAX

LPF

FULL

HPF

CH 3/4

40Hz 400Hz

1CH

SPEAKER

2CH

BRIDGED

2CH+

3CH

SPEAKER

4CH

BRIDGED

GND

POWER

REMOTE +12V

FUSE

+3CH c. 2CH MODE

+1CH

PR 4.50

1CH

HIGH INPUT

3CH

OFF - BOOST - ON

GAIN

X - OVER

X - OVER GAIN

X - OVER

X - OVER PROT PWR

REMOTE

2CH

LOW INPUT

4CH

MIN MAX

LPF

FULL

HPF

CH 1/2

40Hz 400Hz MIN MAX

LPF

FULL

HPF

CH 3/4

40Hz 400Hz

1CH

SPEAKER

2CH

BRIDGED

3CH

SPEAKER

4CH

BRIDGED

GND

POWER

REMOTE +12V

FUSE

+3CH

9

TRI-MODE

MIXED STEREO/MONO MODE (FIG.3)

*FOR OPTIONS, CONSULT WITH YOUR DEALER/INSTALLER.

L+ *

+

R+

(OPTIONAL CAPACITOR)

* +

OPTIONAL INDUCTOR

LEFT SPK

4 Ohms min

+

RIGHT SPK

4 Ohms min

SUBWOOFER

8 Ohms min

Fig.3

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SET UP 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 maximum (full clockwise rotation), less signal voltage is required to drive the amp to full output. With the gain at minimum (full counter-clockwise rotation), more signal voltage is required to drive the amp to full output.

High Pass Filter (crossover) or HPF

The high pass crossover, or filter, is designed to remove low frequency information from a speaker. This is generally used to protect smaller drivers from trying to reproduce low frequency information that might damage them. The crossover frequency is adjustable from

40Hz to 400Hz, and uses an 12dB 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 and counter-clockwise lowers the frequency. Most mid-bass or midrange drivers should be set between 80 and 100Hz, depending on how high the subwoofer(s) plays. For mid-range drivers that are "5" or smaller, we suggest setting the high-pass crossover to at least 120Hz. The HPF can also be combined with passive crossovers on a separate or co-axial 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 (crossover) or LPF

The low pass crossover, or 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 40Hz to 400Hz, and uses an 12dB per octave slope.

To engage the LPF, simply slide the switch to the position on the 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 80 and 100Hz, depending on how low the mid-bass or midrange drivers are capable of playing.

Flat-no filter

Sliding the selector switch to this position turns off all crossovers, and allows a fullrange signal to pass. The Flat position should be selected when using outboard electronic crossovers.

Bass Boost

Bass boost on all models is switchblade either on or off. Boost on the 2.150 is variable.

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.

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FEATURES AND CONTROLS

TROUBLESHOOTING

Before removing your amplifier, refer to the list below and follow suggested procedures.

Speakers and their wires should be tested first.

No Output: a. Confirm that all terminal strip connections are firmly connected.

b. Check in-line and built-in fuses. Both "12V"and "RMT" terminals must have +12 Volts to

chassis ground.

c. Confirm the signal source ( Car Radio/Deck, EQ, X-over etc .) is connected and is supplying

output signal. To confirm the amplifier is working, connect an RCA patch cord to LEFT &

RIGHT low-level inputs of amplifier only (Do not connect the other end of the patch cord).

Briefly tap the center pin of each (disconnected) RCA plug on the other(disconnected) end

with your finger. This should produce a noise (feedback) in the speakers.

Only One Channel Works: a. Confirm that speaker terminal strip connections are firmly connected.

b. Check "BALANCE" control on Car Stereo(or signal source) to verify it is at mid-point.

c. If using RCA Low-Level inputs, reverse the input plugs at the Amplifier (right to left or

vice versa). If the channel that is silent reverses position, the problem is in the car stereo

(EQ, X-over, or other signal source) or connecting cable.

Weak Output a. Check input sensitivity control adjustment.

Noise in Audio a. If noise is a "whine" that goes up and down with engine speed, confirm that the amplifier

and any other source unit(Radio, EQ, X-over etc.) are properly grounded.

b. A "clicking" or "popping" noise at a rate that follows engine speed is generally induced

by the vehicles's ignition system. Confirm that the vehicle is equipped with resistor plugs

and plug wires. Or, ignition system may need service.

c. Speaker and input wires should not be routed next to wires that interconnect lights and

other accessories/equipment.

d. If above steps do not improve/clear noise interference, the system should be checked by

a professional mobile audio installer.

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SPECIFICATION

RMS Pwr/CH 4 Ohms

RMS Pwr/CH 2 Ohms

RMS Pwr/Mono 4 Ohms

THD(Into 4 Ohm)

(Into 2 Ohm)

Signal/Noise Ratio

Channel Separation

Frequency Response 0.5dB

Crossover Frequency , LPF/HPF

Bass Boost

Adjustable Sensitivity Range

Low Level

High Level

Input Impedance

Low Level

High Level

Fuse

Dimensions (W x H x D)

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

16-PR2.50

16-PR2.75

50W

70W

75W

100W

16-PR2.100

100W

130W 200W

140W

300W

<0.05% <0.05% <0.05%

<0.1% <0.1% <0.1%

>90dB >90dB >90dB

>60dB >60dB >60dB

20Hz-20kHz 20Hz-20kHz 20Hz-20kHz

40Hz-400Hz 40Hz-400Hz 40Hz-400Hz

45Hz 9dB 45Hz 9dB 45Hz 9dB

200mV-6V

0.5-5V

200mV-6V

0.5-5V

200mV-6V

0.5-5V

22k Ohms

40 Ohms

22k Ohms

40 Ohms

22k Ohms

40 Ohms

30 Amp

10" x 2.3" x x

1

11" 10"

20 Amp x 2.3" x x 2

11.6" 10"

25 Amp x 2.3" x x 2

14.5"

RMS Pwr/CH 4 Ohms

RMS Pwr/CH 2 Ohms

RMS Pwr/Mono 4 Ohms

THD(Into 4 Ohm)

(Into 2 Ohm)

Signal/Noise Ratio

Channel Separation

Frequency Response 0.5dB

Crossover Frequency , LPF/HPF

Bass Boost

Adjustable Sensitivity Range

Low Level

High Level

Input Impedance

Low Level

High Level

Fuse

Dimensions (W x H x D) :

:

:

:

:

:

:

:

:

:

:

:

:

:

:

:

16-PR4.50

50W

70W

130W

<0.05%

<0.1%

>90dB

>60dB

20Hz-20kHz

40Hz-400Hz

45Hz 9dB

200mV-6V

0.5-5V

22k Ohms

40 Ohms

30 Amp x 2

10" x 2.3" x 15.3"

16-PR2.150

150W

210W

400W

<0.05%

<0.1%

>90dB

>60dB

20Hz-20kHz

40Hz-400Hz

6-18dB

200mV-6V

0.5-5V

22k Ohms

40 Ohms

20 Amp x 4

10" x 2.3" x 19.7"

FEATURES AND SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

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Should your amplifier require service Please consult with the dealer from which it was purchased, or contact Memphis Car Audio Customer Service: 800-467-2400 or techsupport

@memphiscaraudio.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 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, un-repaired.

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