Rockville dB25 Owner's Manual
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Rockville dB25 Owner's Manual

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OWNER'S MANUAL

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  • Page 1 OWNER’S MANUAL...

  • Page 3: Important Safety Instructions

    • To reduce risk of electric shock, never open the unit. There are no user serviceable parts, refer service to an authorized Rockville service center.
  • Page 4 Rockville uses only true audio transistors in the audio section of these amplifiers. These transistors were designed and engineered to produce music. That’s why Rockville amplifiers clearly sound better. They are cleaner with lower distortion, higher current capable and more reliable. We challenge you to test listen a Rockville amplifier and hear the difference yourself.

  • Page 5: Battery Voltage

    BATTERY VOLTAGE: Rockville dB Series amplifiers are rated and regulated to 13.8 volts and below. Increasing voltage to 14.4 volts will increase the power output of the amplifier in the same proportion. Maximum input voltage is 14.4 volts while the minimum voltage is 12 volts.

  • Page 6: Mounting The Amplifier

    Before you begin your installation, disconnect the NEGATIVE(-) terminal from your car’s battery. This safety precaution will avoid possible short circuits while wiring your amplifier. Rockville amplifiers operate on 12-volt negative ground systems only. It is recommended that you layout your sound system design on paper first. This will help you during the installation so that you will have a wiring flow chart and not miss-wire any of your components.
  • Page 7 Wiring The remote turn on connection is located on the barrier strip next to the power and ground connections. This connection is responsible for turning the amplifier on and off with the rest of the system. A smaller gauge wire can be used to make this connection to your radio’s power antenna lead. Should your system not have any turn on leads, you can wire the remote terminal to an accessory lead, which turns the amplifier on with your car’s ignition.
  • Page 8 Settings ADJUSTING THE SYSTEM USING THE ELECTRONIC CROSSOVER - 4 CHANNEL MODELS Once the system is operational, the first thing to do, is set all crossover points to The four and five channel models feature separate crossovers for channels 1-2 and 3-4. approximate settings.
  • Page 9 Settings SETTING THE CONTROLS: AUDIO PREAMP INPUT The dB Series amplifiers feature RCA pre amp inputs. Run RCA cables from your sound source to the inputs of the amplifier. We suggest the use of high quality shielded RCA patch cords to help reduce and eliminate unwanted electrical noise to your system. Use good quality RCA interconnect cables.
  • Page 10 5 Channel Amp with 2 Channel Input If your head unit has one single pair of RCA outputs, input them in to the amplifiers Channel 1 and 2 input jacks and set the Input Mode Switch to 2Ch. The amplifiers preamp circuitry will automatically mix all the channels and output will occur on all 5 channels.
  • Page 11 5 Channel Amp with 4 Channel Input If your head unit has two pairs of RCA outputs, input Front Left and Front Right in to amplifier Channels 1 and 2 input jacks. Rear Left and Rear Right in to amplifiers Channels 3 and 4 input jacks. Set the Input Mode Switch to 4Ch.
  • Page 12 5 Channel Amp with 5 Channel Input If your head unit has three pairs of RCA outputs, input Front Left and Front Right in to amplifier Channels 1 and 2 input jacks. Rear Left and Rear Right in to amplifiers Channels 3 and 4 input jacks. Subwoofer output in to Channel 5.
  • Page 13 5 Channel Amp Speaker Wiring Minimum impedance for channels 1 through 4 is 2 ohm stereo. Channel five minimum impedance is 2 ohm mono capable. INPUT MODE SET TO 5 CHANNEL COMPONENT SPEAKERS MINIMUM IMPEDANCE 2–4 OHMS COMPONENT SPEAKERS MINIMUM IMPEDANCE 2–4 OHMS COMPONENT SPEAKERS MINIMUM IMPEDANCE...
  • Page 14 Basic 4 Channel Configuration Install any combination of speakers independently on all 4 channels being careful not to load any single channel below 2 ohm stereo. For typical 6˝ x 9˝ or 6.5˝ or component speaker installs, set the Crossover Mode Switches to Full Range. FRONT SPEAKERS LEFT RIGHT...
  • Page 15 4 Channel Amp Bridged to 2 Channels When bridging the four channel amplifier, make sure that your final woofer impedance on each bridged channel is no lower than 4 ohms. Set the Channel 1 and 2 Crossover Mode Switch to LPF; set the Channel 1&2 and Channel 3&4 Crossover Mode Switches to LPF. Begin by setting the crossover frequency controls to 100Hz and tuning from there. CHANNEL 1–2 CROSSOVER SWITCH TO LPF...
  • Page 16 4 Channel Amp in 3 Channel Mode Channels 1 and 2 should be wired to speakers no lower than 2 ohm loads per channel in stereo. Channel 3 and 4 should be bridged as per the diagram wiring the woofer to Channel 3 positive side (+) and Channel 4 negative side ( –...
  • Page 17 4 Channel with Mixed Mono CHANNEL 1–2 CROSSOVER SWITCH TO HIGH PASS SUBWOOFER MINIMUM IMPEDANCE 8 OHMS LOW PASS FILTER INDUCTOR FRONT SPEAKERS LEFT RIGHT CHANNEL 3– 4 CROSSOVER SPEAKER SPEAKER SWITCH TO LPF 4 OHM 4 OHM COMPONENT VALUES FOR 6dB PASSIVE CROSSOVER 4 OHM...
  • Page 18 4 Channel Amp with Dual Mixed Mono Configuration SUBWOOFER MINIMUM IMPEDANCE SYSTEM A ALL CROSSOVER SETTINGS 4-8 OHMS FRONT SPEAKERS IN THIS MODE SHOULD BE SET TO FULL RANGE. LOW PASS FILTER INDUCTOR RIGHT LEFT When configuring mixed mono systems, wire either SPEAKER SPEAKER using SYSTEM A or SYSTEM B depending on the use of...
  • Page 19 Class D Monoblock 2 Ohm Amplifier 2 OHM MINIMUM LOAD The dB16, dB15, dB14, dB13, and dB12 are all 2 ohm stable monoblock amplifiers. No matter how many woofers you choose the final impedance should not fall to wire up to these models, - OR - below 2 ohm.
  • Page 20 Class D Monoblock 2 Ohm Amplifier All dB series monoblock amplifiers are 2 ohm stable. They feature RCA pre amp line outputs for feeding of a full range signal to a secondary full range amplifier in a multi-amp system.
  • Page 21 Twin Amp Bridging The dB14, dB15, and dB16 can be bridged together for double the power output into a single 4-ohm load. Remember, when bridging amplifers you must bridge them to a 4 ohm load. Input the head unit signal into the MASTER amplifer and set the Bridged Mode switch to Output Master. Use a MONO RCA to RCA cable to send the fully processed signal from the MASTER amplifier to the secondary SLAVE amplifier and set the Bridged Mode switch to Input Slave.
  • Page 22 Twin Amp Bridging SWITCH SET TO MASTER MASTER REMOTE SUBWOOFER LEVEL CONTROL SWITCH SET TO SLAVE MASTER / SLAVE LINK SLAVE...
  • Page 23 Twin Amp Bridging IMPORTANT NOTE: SUBWOOFER MINIMUM CONNECT THE TWO SPEAKER NEGATIVES TOGETHER WITH IMPEDANCE 2 OHMS A # 12 WIRE STRAP. IF THIS STRAP IS NOT INSTALLED, THE AMPLIFIERS COULD BE DAMAGED!

  • Page 24: Specifications

    Specifications dB55 dB45 5 Channel Amplifier • CEA Power Ratings • CEA Power Ratings: 2 Ohm: 200 Watts x 4 Channels <1% THD+N 2 Ohm: 120 Watts x 4 + 500 Watts <1% THD+N 4 Ohm: 135 Watts x 4 Channels <1% THD+N 4 Ohm: 80 Watts x 4 + 300 Watts <1% THD+N...
  • Page 25 Specifications dB25 dB16 • CEA Power Ratings: • CEA Power Ratings: 2 Ohm: 350 Watts x 2 Channels <1% THD+N 2 Ohm: 2000 Watts x 1 Channel <1% THD+N 4 Ohm: 230 Watts x 2 Channels <1% THD+N 4 Ohm: 1200 Watts x 1 Channel <1% THD+N 4 Ohm Bridged: 700 Watts x 1 Channels <1% THD+N •...
  • Page 26 Specifications dB15 dB14 • CEA Power Ratings: • CEA Power Ratings: 2 Ohm: 1500 Watts x 1 Channel <1% THD+N 2 Ohm: 1000 Watts x 1 Channel <1% THD+N 4 Ohm: 900 Watts x 1 Channel <1% THD+N 4 Ohm: 600 Watts x 1 Channel <1% THD+N •...
  • Page 27 Specifications dB13 dB12 • CEA Power Ratings: • CEA Power Ratings: 2 Ohm:750 Watts x 1 Channel <1% THD+N 2 Ohm:500 Watts x 1 Channel <1% THD+N 4 Ohm: 450 Watts x 1 Channel <1% THD+N 4 Ohm: 300 Watts x 1 Channel <1% THD+N •...

  • Page 28: Speaker Wiring Guide

    Speaker Wiring Guide 4 + 4 4 + 4 4 + 4 4 + 4 4 + 4 4 X DUAL VC 8 OHM 2 OHM SPEAKERS WITH AMPLIFIER VOICE COILS, ALL IN PARALLEL SERIES: PARALLEL: 4 OHM TO 2 OHM TO SINGLE VOICE SINGLE VOICE AMPLIFIER...
  • Page 29 Speaker Wiring Guide SERIES: PARALLEL: DUAL VOICE COIL DUAL VOICE COIL SPEAKERS SPEAKERS Please note that the minimum impedance load 4 + 4 8 OHM TO for single dB Series Amplifiers is 2 ohm stereo AMPLIFIER and 4 ohm mono bridged. 4 + 4 2 OHM TO AMPLIFIER...
  • Page 32 © 2016 ROCKVILLE // Features and specifications are subject to change and or improvement without notice. Though we tried our best to ensure that this manual is free and clear of errors please don’t hold us responsible for printing errors.

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