ROCKVILLE ATV420 4 Channel IP65 Rated Bluetooth Micro Amplifier for UTVs and Motorcycles Owner’s Manual

ATV420
4-CHANNEL 1P65 RATED BLUETOOTH MICRO AMP FOR UTVs and MOTORCYCLES
OWNER’S MANUAL

ATTENTION: WATCH THIS VIDEO BEFORE FIRST USE!
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Missing items? If you ordered a bundle that includes more than one product and you are missing part of your bundle then it just means your order shipped from two different warehouses. You will receive the remaining items very soon. If you have any concerns or inquiries, feel free to call our customer support center at 1-646-758-0144, 24 hours a day/7 days a week.

Thank you for purchasing this Rockville ATV420 amplifier. Please read this owner’s man-ual carefully for proper use of your ATV420. Should you need assistance, please call our technical helpline at 1-646-758-0144, 24 hours a day/7 days a week.

IMPORTANT SAFETY INSTRUCTIONS

• To reduce risk of electric shock, never open the unit. There are no user-serviceable parts, refer service to the Rockville service center.
• Do not expose this unit to any kind of moisture.
• Please ensure that the unit is situated in a properly ventilated area.

1. Power cable (+12V, red)
2. Ground cable (black)
3. Remote turn-on cable (blue)
4. Channel 3 speaker output cables: negative (green w/black stripe) and positive (green).
5. Channel 4 speaker output cables: negative (purple w/black stripe) and positive (purple).
6. Channel 2 speaker output cables: negative (grey w/black stripe) and positive (grey).
7. Channel 1 speaker output cables: negative (white w/black stripe) and positive (white).
8. Channel 3 (white) and channel 4 (red) inputs 9. Channel 1 (white) and channel 2 (red) inputs

Power Connections

1. Make sure to disconnect the NEGATIVE (-) terminal from your vehicle’s battery.
2. Attach a 10-gauge or heavier wire to the black cable from the harness marked GND. The connection should be as close to the amp as possible). The wire should terminate in a ring connector. Connect the ring connector to a metal part of the vehicle’s chassis, making sure that there is no paint or other insulator blocking a good ground connection. If needed, you can connect to the battery’s negative terminal.
3. Attach a 10-gauge or heavier wire to the red cable from the harness marked +12V to the battery’s POSITIVE (+) terminal. The power wire should terminate in a ring terminal connected directly to the POSITIVE (+) terminal.
4. Connect the blue remote wire to the head unit’s remote output using 18-gauge or heavier wire. This connection is responsible for turning the amplifier on and off with the rest of the system. Should your head unit not have any turn-on leads, you can wire the remote terminal to an accessory lead, which turns the amplifier on with your vehicle’s ignition.

Please note, it is a good practice to feel the power and ground wires near the amplifier after using the amp for a while. If the wires feel hot to the touch, you probably have a bad or loose connection. If after adjusting your connections the wires still feel hot, you should upgrade to the next heaviest gauge wire. As connections can work loose due to vehicle vibrations, we recommend periodically tightening all power and ground connections.

Input configurations

2-Channel Input
If your head unit has a single pair of RCA jacks, feed their output to the amplifier’s Channel 1 and 2 input jacks. Set the Input Mode switch to 2CH

4-Channel Mode
If your head unit has two pairs of RCA jacks, feed their output to the amplifier’s Channel 1 — 4 input jacks. Set the Input Mode switch to 4CH (a). Set the input voltage to low (b).

Output Configurations

4-Channel Mode
Install any combination of a component or coaxial speakers independently on channels 1 — 4, being careful not to load any single channel below 2-ohm. For typical 6″ x 9″ or 6.5″ or component or coaxial speaker installs, set the Crossover Mode Switches to full range (OFF) (a).

4-Channel Amp in 2-Channel Bridged Mode
Channels 1-2 and Channels 3-4 should be bridged as per the diagram. Wire one woofer to Channel 1’s positive (+) terminal and Channel 2’s negative ( – ) terminal. Wire one woofer to Channel 3’s positive (+) terminal and Channel 4’s negative ( – ) terminal. Set the crossover switches to LPF if using subwoofers.

4-Channel Amp in 3-Channel Mode
Channels 3 and 4 should be wired to component or coaxial speakers with no lower than 2-ohm load per channel in stereo. Channels 1 and 2 should be bridged as per the diagram wiring the woofer to Channel l’s positive (+) wire and Channel 2’s negative ( – ) wire. Set the Crossover Mode Switches of Channels 3-4 FULL range (a), while Channels 1-2 should be set to LPF (b).

Adjusting the System

1. Once the system is operational, set all crossover points to the approximate settings. In the case of a basic subwoofer system, set the Low Pass Filter (LPF) crossover at 100Hz or so. Turn the controls using a small flathead screwdriver. Do not apply any pressure while turning as this might break the control unit.
2. Set the amplifier’s Input Sensitivity using the control accessible on the side of the amplifier marked LEVEL (gain). Turn it counterclockwise to the MIN position. Adjust your head unit’s volume gain to the maximum it can go before the signal distorts or to the loudest gain, which is usually about 75% – 85% on most head units (you can also use an oscilloscope to see at what gain level your head unit distorts). When you begin to hear distortion, back down one notch. Now turn the LEVEL control on the amp clockwise until you hear distortion, then turn it counterclockwise by a notch or until the distortion is gone. The amp’s input sensitivity is now set. It is helpful to have a second person to help you set the gain. When setting up a multi-amp system, set each amplifier’s level controls separately. Start off with the bass amplifier, then adjust the high amplifier’s level control to match. Please note that the level control of any vessel’s amplifier should not be mistaken for volume control. It is a sophisticated device designed to match the output level of your source unit to the input level of the amplifier. Do not adjust the amplifier level to maximum unless your input level requires it. Your system can also be extremely sensitive to noise when the input level is set to maximum and does not match your input signal. These adjustments need to be made only once when first setting up the system.
3. Once you are satisfied with the level control settings, use any equalizer controls to adjust the system’s tonal level for personal preference. Keep in mind that after equalizing you may have to go back and reset the amplifier’s level controls. If your unit has been professionally installed please do not change the gain settings set by the installer, he or she is the professional!

Features
Input Voltage Switch
This switch allows you to set the voltage sensitivity to match the input source. For example, if you are using a head unit with pre outs, you set the switch on the amp to low (a). If you are using a factory radio, use the included adapters to wire the amp’s RCA inputs to the factory speaker outputs. Then set the switch to high (b) so that all input goes to the RCA jacks.

Bluetooth
When the unit powers up, the BT LED indicator (located on the right side of the harness) will begin to flash indicating that it is in pairing mode. Look for and select ATV420 from your device’s list of list of available Bluetooth devices. If pairing is successful, the LED indicator will remain solid blue. Please note, that a BT connection will override RCA input. If you wish to return to RCA input, you will need to end the connection via your device.
Power/Protect LED
This model features one LED (located on the left side of the harness) that provides an indication of the amplifier’s status. The LED will light green when the amplifier is receiving proper power, ground, and remote voltages. In case the amplifier encounters a diagnostic condition as listed below, the LED will light red indicating a diagnostic condition. When a diagnostic condition is sensed, the amplifier will then turn into self-preservation mode and if the cause of the diagnostic condition is not corrected will eventually shut down. Thermal Protection: When the amplifier reaches an unsafe operating temperature of 80 degrees Celsius, the amplifier will turn off. Once the amplifier cools down to a safe temperature, it will automatically turn on again. If you live in a hot climate, we suggest installing additional cooling fans to exhaust the hot air which can build up in the trunk. This will help keep the ambient temperature in the trunk as low as possible so that your amps work flawlessly and without any musical interruption. Speaker Short Circuit Protection: Should your speaker’s short circuit due to voice coil burn out, or should the amplifier sense an impedance too low to handle, the protection LED will light red, indicating a diagnostic condition. Turn off your system, disconnect one speaker at a time, and try to determine which speaker might be faulty. Correct the condition and restart the amplifier. You must reset the amplifier by turning it OFF and then ON again by the Remote power connection after correcting a diagnostic condition. (Turn your radio off and then on again.) Input Overload Protection: This circuit will either shut down the amplifier completely or make the amplifier spurt on and off indicating that it is in a diagnostic condition. Turn the system off and reduce the gain on the amplifier or volume from your head unit. This should result in a corrected condition.

DC Offset Protection: Should any DC voltage try to enter the amplifier via the speaker terminals it will cause the amplifier to shut down and not operate until this condition is remedied. This circuit will also protect damaging high DC voltages from reaching your speakers should your amplifier ever malfunction.
PLEASE NOTE: You must reset the amplifier by turning it OFF and then ON again after correcting a diagnostic condition (turn your radio off and then on again). If the amplifier stays in protection after a reset, it is most likely faulty. Please note, when powering up/down or when switching between Bluetooth and RCA input, the power/protect LED will be solid red. This feature serves to protect the amp and is perfectly normal.

Features

Additional Features

• Built-in Bluetooth Wireless with Auto Pairing (You can run this amp without any receiver)
• Bluetooth LED indicator
• IP65 waterproof rating
• All inputs and wire wiring is sealed and covered
• Conformal coated circuit board
• Anti rust materials
• Micro Size amplifiers can easily fit in tight spaces
• Digital Class D Audio Topology
• Independent Crossover Controls for CH1-2 and CH3-4
• Full Range/Low Pass/High Pass Configurable
• High Input (Speaker level Input)
• Waterproof sheath RCA Input
• 2CH/4CH Input Mode Selector
• High-Speed MOSFET Power supply
• Status Mode LED Indicator
• Waterproof Grade: IP65

Specifications

• Dyno Certified RMS Power Ratings (Certified Dyno Test / Less than 1 % THD) (Use these ratings when comparing with top brands such as Kicker, Rockford Fosgate, etc) 2 Ohms: 500 Watts (4 x 125 Watts) 4 Ohms: 360 Watts (4 x 90 Watts)
• Peak (Use these ratings when comparing with the top budget brands such as Boss, Power Acoustik, etc): Peak 2 Ohms: 2,000 Watts (500 x 4 Watts)
• Low Pass Crossover: 32Hz – 320Hz
• High Pass Crossover: 32Hz – 320Hz
• Frequency Response: 20Hz – 22kHz
• Signal to Noise Ratio (1 Watt into 4 Ohms): 80dB
• Low Input Sensitivity: 0.2V – 6V
• Distortion(THD): 0.5%
• Speaker/High level Input Sensitivity: 0.5V – 15.5V
• Stereo Separation: 50dB
• Fuse Rating: 50A
• Dimensions (Inches): 8.66″ L x 3.74″ W x 1.73″ H

Troubleshooting

2. Check that the Remote Input Turn-On has at least 5V DC.
3. Check that there is battery power going to the +12V terminal.
4. Check all fuses, and replace if necessary.
5. Make sure the protection LED is not on. If it is, shut off the amplifier briefly and then turn it back on.
Protection LED comes on when an amplifier is powered up| 1. Turn down the volume control on the head unit to prevent overdriving.
2. Check that there is good airflow around the amp.
Check the POWER/PROTECT LED section on page 7 for more information.
No Output| 1. Check the fuse.
2. Check that the unit is properly grounded.
3. Check that the Remote Input Turn-On has at least 5V DC.
4. Check that the input harness is properly connected.
5. Check that all inputs to the harness are properly connected.
6. Check the input source’s power and output settings.
Low Output| 1. Check that the input harness is properly connected.
2. Check that all inputs to the harness are properly connected.
3. Check the input source’s power settings.
High Hiss in the sound| 1. Check that all inputs to the harness are properly connected.
2. It is best to set the amplifier’s gain control as low as possible. The best subjective signal-to-noise ratio is achieved in this manner. Try to set the head unit’s volume level as high as possible without distortion.
Squealing noise is present| Check for improperly grounded RCA interconnects. Keep the audio and power cables separated.
Distorted sound| Check that the Input Gain control is set to match the signal level of the head unit and bring it back down.
Engine noise: Static type| 1. Route your input cables away from the vehicle’s wiring.
2. Use high-quality RCA cables.
Engine noise: Alternator whine| 1. Check that the RCA grounds are not shorted to the vehicle chassis.
2. Check that the head unit is properly grounded.

FEDERAL COMMUNICATIONS COMMISSION COMPLIANCE INFORMATION
Responsible party name: Rockville
Address: 600 Bayview Ave.
Entrance A
Inwood, NY 11096
Hereby declares that the product(s) ATV420 complies with FCC rules as mentioned in the following paragraph: This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

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© 2022 ROCKVILLE II Features and specifications are subject to change and or improvement without notice.

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