8" or 10" Slim Under-Seat Active Powered Car/Truck Subwoofer
The USS Series offers an all in one solution to give you great sounding bass in your vehicle without taking up a lot of space. These sub enclosures are only 2.9" thick so they can easily fit under your seat. The amplifier is built-in, so installation and wiring is clean and simple. This is a true all in one subwoofer solution with the subwoofer built into the enclosure along with a top of the line amplifier built-in as well.
We focused on making installation a breeze so we designed these units with you, the customer, in mind. We added high level inputs so you can install them to an after-market or factory system. The high level inputs allow you to install them even if you have no preamp outputs available.
Important Safety Instructions
To reduce risk of electric shock, never open the unit. There are no 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.
Features
Remote Level Control Port: Plug in the included remote level control to adjust the volume level of the subwoofer independently.
High Level Input: These inputs, also referred to as speaker level inputs, allow you to connect to the factory speaker wires. They are called High Level inputs because they convert the high voltage running through factory speaker wires to one the amplifier can handle. These inputs will provide the end user with clean, well defined sound for optimal musical enjoyment. Use the supplied cable and wire harness and connect the outputs properly as shown in the connection diagram in this manual.
Low Level RCA Inputs: Low level inputs are the recommended way to introduce an audio signal to the subwoofer if RCA outputs are present on your head unit or other signal source (such as a sound processor).
Input Gain Control: After you've installed your system, turn this control to minimum. Turn the head unit on (subwoofer will turn on via the remote connection) and set the volume to 2/3 full level. Slowly turn up the subwoofer input gain control until you hear a small amount of distortion. Now reduce the level until the distortion is completely gone. The input gain control is now set.
Low Pass Filter: This control permits you to define the frequency range you want the subwoofer amplifier to receive. The subwoofer will reproduce all sound below the frequency you set.
Auto Start: The auto start function is for high level (speaker level) connections. When the switch is in the "ON" position, the subwoofer will turn on when there is a signal input. If there is no signal input, the subwoofer will automatically turn off. If you prefer to use the remote turn-on function, leave the switch in the "OFF" position.
Power/Protect LEDs: The 2 LED's located on the side of the amplifier provide indication of the amplifier status, the Power LED will light when the amplifier is receiving proper power, ground and remote voltages. The second LED will light when the amp goes into protection mode.
Thermal Protection: When the unit reaches an unsafe operating temperature of 80 degrees Celsius, the unit will turn off. Once the unit 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 unit works flawlessly and without any musical interruption.
Input Overload Protection: This circuit will either shut down the unit completely or make the unit spurt on and off indicating that it is in a diagnostic condition. Turn the system off and reduce the gain on the unit or volume from your head unit. This should result in a corrected condition.
DC Offset Protection: Should any DC voltage try to enter the unit via the speaker terminals it will cause the unit 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 unit ever malfunction.
PLEASE NOTE: You must reset the unit by turning it OFF and then ON again after correcting a diagnostic condition (turn your radio off and then on again). If the unit stays in protection after a reset, it is most likely faulty.
Bass Boost: This control will increase the sound level of the bass frequencies.
Subsonic: This control will filter out low frequency noise and rumble.
Phase Shift: Use this button to help compensate for time alignment problems. Such problems usually result from having the subwoofer positioned at a different distance from the listener than the other speakers in the system.
Fuse: Do not use a fuse with a different value than the one provided.
Power/Remote/Ground Terminal
Wiring
Low-Level Input
Low-level (RCA) input wiring is preferred for best audio performance. Most trunk and underseat installations will require a 6-12 foot RCA cable. Always use a high quality cable.
Power/Ground Wiring for Low-Level Input Configuration
2. Run the power cable from the 12V terminal to the positive (+) terminal of the vehicle's battery. Use 8 gauge (or heavier) wire.
3. Run the remote cable (blue) from the REM terminal to the remote output of the head unit using 16 gauge (or heavier) wire. Unit will not turn-on if this cable is not connected.
4. Run the ground cable (black) from the GND terminal to the closest metal point on the chassis of the vehicle. Use 8 gauge (or heavier) wire.
WARNING: Do not use high level and low level inputs at the same time.
High Level Input
The high level inputs should only be used when your receiver lacks RCA outputs. Splice the high level input leads from the harness directly to your head unit's speaker-level outputs. Be sure to observe polarity to avoid audio phase problems.
Power/Ground Wiring for High-Level Input Configuration
2. Run the power cable from the 12V terminal to the positive (+) terminal of the vehicle's battery. Use 8 gauge (or heavier) wire.
3. Run the ground cable (black) from the GND terminal to the closest metal point on the chassis of the vehicle. Use 8 gauge (or heavier) wire.
ATTENTION: When using high level inputs, do not connect the blue remote cable to the amplifier's remote terminal block.
Bass Remote
Using the included RJ45 cable, install the remote control securely under the dash or in a similar location where using it will not distract the driver.
Features
PWM MOSFET Power Supply
Low Level RCA Input
High Level Inputs with Auto Turn-On Technology
Adjustable Input Sensitivity
Soft Delayed Remote Turn-On
Thermal Protection Circuit, Short Protection Circuit
Green Power/Red Protect LED
Phase Switch: 0° or 180°
Low Pass Filter: 50Hz - 150Hz
Bass Boost: 0-12dB @ 45Hz
Subsonic Filter: 20Hz - 50Hz
Subwoofer Level Remote Control
Specifications
USS8
RMS Power: 150 Watts
Peak Power: 600 Watts
Impedance: 3 Ohm
Minimum THD at Rated Power: <0.15%
Frequency Response: 15Hz - 125Hz
S/N Ratio: 82dB
Sensitivity: 90dB @ 1w/1m
RCA Input sensitivity: 195mV
High Level Input sensitivity: 5.6V
Single 20 Amp Fuse
Dimensions: (W x H x L) 9.9" x 2.9" x 13.6"
USS10
RMS Power: 200 Watts
Peak Power: 800 Watts
Impedance: 2 Ohm
Minimum THD at Rated Power: <0.15%
Frequency Response: 15Hz - 125Hz
S/N Ratio: 82dB
Sensitivity: 90dB @ 1w/1m
RCA Input sensitivity: 195mV
High Level Input sensitivity: 5.6V
Single 25 Amp Fuse
Dimensions: (W x H x L) 10.89" x 2.9" x 15"
Troubleshooting
Problem | Solution |
No power | 1. Check your ground and power connections. 2. Make sure the power terminal is receiving at least 12V. 3. If using RCA inputs, ensure the Remote terminal is receiving at least 5VDC. 4. Check the fuse and replace if necessary. 5. Make sure the Protect LED is not illuminated. If it is, turn the amplifier off and then back on. 6. Check the Auto Start button. It should be OFF if using the RCA inputs and ON if using the high-level inputs. |
Protection LED illuminates when the unit is powered on | 1. Check for short-circuits on high-level leads. 2. Turn down the head unit's volume to prevent overdriving. 3. Disconnect the high-level leads and reset the amplifier (turn off and then on). If the Protect LED still illuminates, the amp is faulty and needs servicing. 4. If the signal is too hot, lower the gain level. 5. Make sure the power connections are secure. |
No output | 1. Check the fuse and replace if necessary. 2. Make sure the unit is properly grounded. 3. Make sure the Remote terminal is receiving at least 5VDC. 4. Make sure the RCA cables are properly connected. 5. Check your high-level connections. 6. If your head unit has a separate subwoofer output, check the settings to make sure it is enabled. 7. Check the Auto Start button. It should be OFF if using the RCA inputs and ON if using the high-level inputs. |
Low output | 1. Reset the gain control. 2. Check the crossover control settings. 3. Power and ground cables that are too thin a gauge size for the terminals may cause low sound. Determine the proper cable gauge necessary and replace existing cables. |
High hiss sound/squealing noise is present | 1. Check for improperly grounded RCA interconnects. 2. Check to see how your wires are run. If your RCA cables and speaker wire are run alongside your power cables, they will pick up feedback. If this is the case, you will need to run the RCA cable on the other side separate from your power cable. 3. Noise can be picked up due to bad RCA cables. We recommend doing a test with different RCA cables. Replace the RCA cables if needed. |
Distorted sound | 1. Make sure the input level control is set to match the signal level of the head unit. Always try to set the input level as low as possible. 2. Make sure all crossover frequencies are properly set. 3. Check for short circuits on the high-level leads. |
Amplifier gets very hot | 1. Make sure the wiring is correct and you are using the proper wires for your system. 2. A poor ground cable connection can cause your amp to get very hot. Check your ground connection and make sure that the cable is securely tightened. 3. Check the location where your amp is mounted. Make sure it is in a spot where it will receive proper ventilation. |
Engine noise: static type | 1. Route your RCA cables away from the power cables. 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. |
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