Alpine MRV-100M - Subwoofer Drive Monaural Power Amplifier Manual

PRECAUTIONS

• Perform the installation at a location that is level. Make sure the parking brake is on and the ignition is OFF.
• Always disconnect the cable from the (–) negative pole of the battery before connecting or disconnecting the MRV-100M. This will prevent the possibility of short circuits.
• When replacing a blown fuse make sure to replace it with one of the same value.
• Be sure to connect the color coded leads according to the diagram. Incorrect connections may cause the unit to malfunction or damage to the vehicle's electrical system.
• Be sure to connect the speaker (–) leads to the speaker (–) terminal. Never connect left and right channel speaker cables to each other or to the vehicle body.
• This unit is designed for 12 VDC, negative ground systems. Make sure that your vehicle has this type of electrical system before connecting the power cable.
• When making connections to the car's electrical system, be aware of the factory installed components (e.g. on-board computer). Do not tap into these leads to provide power for this unit. When connecting the MRV-100M to the fuse box, make sure the fuse for the intended circuit of the MRV-100M has the appropriate amperage. Failure to do so may result in damage to the unit and/ or the vehicle. When in doubt, consult your ALPINE dealer.
• The MRV-100M uses female RCA-type jacks for connection to other units (e.g. amplifier) having RCA connectors. You may need an adaptor to connect other units. If so, please contact your authorized ALPINE dealer for assistance.
• Due to the high power output of the MRV-100M, it is important that all connections are clean and well secured, or damage could result.
• When installation and connections are completed, check the followings:

1. Connections are proper.
2. Operation of brake lamps, horn etc. are proper with the ignition ON.
3. Operation of audio units is proper with the switch ON.

SERVICE CARE

This Amplifier has been type tested and found to comply with the limits for a Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules. This equipment generates and uses radio frequency energy, and it must be installed and used properly in accordance with the manufacturer's instructions.

INSTALLATION

Due to the high power output of the MRV-100M, considerable heat is produced when the amplifier is in operation. For this reason, the amplifier should be mounted in a location which will allow for free circulation of air, such as inside the trunk. For alternate installation locations, please contact your authorized Alpine dealer.

1. Using the amplifier as a template, mark the four screw locations.
2. Make sure there are no objects behind the surface that may become damaged during drilling.
3. Drill the screw holes.
4. Position the MRV-100M over the screw holes, and secure with four self-tapping screws.

NOTE:
To securely connect the ground lead, use an already installed screw on the metal part of the vehicle (marked ( )). Be sure this is a good ground by checking continuity to the battery (–) terminal. As much as possible connect all equipment to the same ground point. These procedures will help eliminate noise.

1. Self-Tapping Screws (M4 x 14)
2. Ground Lead
3. Chassis
4. Holes

SPECIFICATIONS

NOTE:
For product improvement, specifications and design are subject to change without notice.

CONNECTIONS

Before making connections, be sure to turn the power off to all audio components. Connect the yellow battery lead from the amp directly to the positive (+) terminal of the vehicle's battery. Do not connect this lead to the fuse block.

To prevent external noise from entering the audio system.

• Locate the unit and route the leads at least 10 cm away from the car harness.
• Keep the battery power leads as far away from other leads as possible.
• Connect the ground lead securely to a bare metal spot (remove the coating if necessary) of the car chassis.
• If you add an optional noise suppressor, connect it as far away from the unit as possible. Your Alpine dealer carries various Alpine noise suppressors, contact them for further information.
• Your Alpine dealer knows best about noise prevention measures so consult your dealer for further information.

1. RCA Input Jacks
   Connect these jacks to the line out leads on your head unit using RCA extension cables (sold separately). Be sure to observe correct channel connections; Left to Left and Right to Right.
2. Speaker Output Terminals
   The MRV-100M has two sets of speaker outputs. Be sure to observe correct speaker output connections and phasing. Connect the positive output to the positive speaker terminal and the negative to negative.
   Do not use the speaker (–) terminals as a common lead between the left and right channels. Do not connect this lead to the vehicle's chassis.
   NOTES:

• Do not connect speaker leads together or to chassis ground.
• The input is stereo but the output is monaural.

3. Battery Lead (Yellow) (Sold Separately)
   Be sure to add a 25 amp fuse as close as possible to the battery's positive (+) terminal. This fuse will protect your vehicle's electrical system in case of a short circuit. If you need to extend this lead, the wire gauge should be 8 AWG or larger.
4. Remote Turn-On Lead (Blue/White) (Sold Separately)
   Connect this lead to the remote turn-on or power antenna (positive trigger, (+) 12V only) lead of your head unit.
5. Ground Lead (Black) (Sold Separately)
   Connect this lead securely to a clean, bare metal spot on the vehicle's chassis. Verify this point to be a true ground by checking for continuity between that point and the negative (–) terminal of the vehicle's battery. Ground all your audio components to the same point on the chassis to prevent ground loops.
6. Insulation Tube
7. Speaker Input Leads
   These leads are input leads for use with head units not equipped with preamp outputs. When not using the RCA Line Input connectors, you should connect these wires to the speaker output leads of your head unit. The MRV-100M accepts input from high power or standard power head units.
8. Left Speaker (White (+))
9. Left Speaker (White/Black (–))

- Right Speaker (Gray (+))

1. Right Speaker (Gray/Black (–))

NOTE:
In case of using the speaker input cord, noises may occur at power off depending on the head unit connected. If you feel uneasy about the noises, add a SPST switch to the connection.

Cautions on wire lead connections

In case of using the leads (speaker/power supply cord) purchased at the market, use the hexagon screws and the hexagon wrench included as the accessory to make connection easier. Improper handling may cause troubles, so make the connections correctly by referring to the description shown below.
A special care will be necessary for the connections using the hexagon screws, so we recommend you to ask the connection for your dealer.

1. Check the wire size.

Notes:

• Recommendable wire size used for the unit is AWG8 – AWG18.
• If the wire size used is unknown, ask to the shop you get the unit, service shop, Alpine Service Center, etc.

2. Remove the insulation cover (insulation material such asvinyl, etc.) of the wire leads by about 7 – 10mm (9/32" – 3/ 8") from the lead end to exposure the conduction leads.
   

Notes:

• If length of the conduction leads with the cover removed is too short, incorrect connection may occur and this may cause operation failure or sound interruption.
• On the other hand, if the length is too long, an electrical short-circuit may occur.

3. Remove the screw attached on the unit. Insert the leadend into the lead terminal. Tighten the hexagon screw with the hexagon wrench, and the lead will be fixed.
   
   Before making this connection, dress a short-circuit prevention rubber tube to the leads.

Notes:

• Use only the hexagon screws supplied.
• For the safety, always connect the battery leads last.
• To prevent disconnection of the leads or drop of the unit, do not grasp the leads when carrying the unit.

SWITCH SETTINGS

2. High-pass Output Phase Switch
   Sets the phase of this output to 0° (in phase) or 180° (inverted) independently from the other output. Often, the subwoofer and midrange (or midrange and tweeter) may be acoustically out of phase with each other, meaning all the sound will cancel completely or partially. Also, 2nd order filters are naturally out-of-phase electrically. Always try the phase switch to establish the best setting before fine-tuning the crossover frequencies.
3. Crossover Frequency Adjustment Knob
   Permits adjustment of the crossover frequency, by rotating the knob to select any frequency between 50 to 200 Hz as the crossover point.
4. Bass EQ Selector Switch
   Set to "ON" position when using for driving subwoofer.
5. Bass EQ Adjustment Knob
   Use when the Bass EQ Selector Switch is set to "ON". Adjust the low frequency to your favorite level between 0dB to +12dB.
6. Input Gain Adjustment Control
   Set the MRV-100M input gain knobs to the minimum (4V) position. Using a loud cassette or preferably a CD as a source, turn up the head unit volume until it distorts. Then, reduce the volume 1 step. You can then increase amplifier gain until the sound from the speakers becomes distorted.

Please check your head unit for the conditions listed below: (Fig. 5)

1. The head unit does not have a remote turn-on or powerantenna lead.
2. The head unit's power antenna lead is activated only whenthe radio is on (turns off in the tape or CD Mode).
3. The head unit's power antenna lead is logic level output (+) 5V, negative trigger (grounding type), or cannot sustain (+) 12V when connected to other equipment in addition to the vehicle's power antenna. If any of the above conditions exist, the remote turn-on lead of your MRV-100M must be connected to a switched power source (ignition) in the vehicle. Be sure to use a 3A fuse as close as possible to this ignition tap. Using this connection method, the MRV100M will turn on and stay on as long as the ignition switch is on.
   If this is objectionable, a SPST (Single Pole, Single Throw) switch, in addition to the 3A fuse mentioned above, may be installed in-line on the MRV-100M turn-on lead. This switch will then be used to turn on (and off) the MRV-100M. Therefore, the switch should be mounted so that is accessible by the driver. Make sure the switch is turned off when the vehicle is not running. Otherwise, the amplifier will remain on and drain the battery.
   1. Blue/White
   2. Power Antenna
   3. Remote Turn-On Lead
   4. To other Alpine components' Remote Turn-On Leads
   5. SPST Switch (optional)
   6. Fuse (3A)
   7. As close as possible to the vehicle's ignition tap
   8. Ignition Source

TYPICAL SYSTEM CONNECTIONS

★ Use either RCA line level or speaker level inputs. Do not connect both at the same time.

NOTE
When making the connection with the speaker input lead, refer to the system shown in Fig. 8.

One Speaker System

7. Extension Cable (Sold Separately)
8. Head Unit with Pre-Amp Outputs
9. Subwoofer

Two Speaker System

Speaker Input Leads System

Fig. 8

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