Rockville RPM45

1800W Powered 4 Channel Mixer/Amplifier w/ USB, EQ, Effects, and Phantom

Important Safety Instructions

A standard electrical safety warning label enclosed in a rounded rectangular border: Left Icon: A black triangle containing a white lightning bolt symbol indicating high-voltage electrical hazard. Center Text Box: A central box with a black top banner reading "CAUTION" in white uppercase text. The white lower box reads "RISK OF ELECTRIC SHOCK. DO NOT OPEN" in black uppercase text. Right Icon: A black triangle containing a white exclamation point symbol indicating a general safety hazard alert.

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.
Make sure the unit is placed on a level and stable surface.

Functions

Numbered front panel diagram for the Rockville RPM45 4-channel powered mixer, detailing individual channel controls, delay/echo effects, MP3 media player, and master output knobs.

Channel Reverb: Controls the amount of reverb added to the input signals.
Channel Treble: ±15dB
Channel Bass: ±15dB
XLR Mic Input: Connect microphones using balanced XLR audio cable (mic cable).
- Input Impedance of 1K ohms
- PIN 1 = Shield / Ground
- PIN 2 = Positive (+hot)
- PIN 3 = Negative (-cold)
  WARNING: When using condenser microphones, make sure that Phantom Power (item 15) is on.
¼˝ Unbalanced Line Input: Connect a line output from an active audio device (such as a synth, keyboard, drum machine, cassette player, CD player, TV or computer).
- You may also be able to connect a high impedance passive audio source (such as an electric guitar or bass).
- It is a two-conductor input with an impedance of 10K ohms.
Channel Volume: This control acts as a preamp level or gain control.
Master Effects Controller:
- Volume: Controls the level of the effects added back to the master mix.
- Echo: Controls the rate at which the echo decays, or how long the echo continues to repeat before fading out.
- Delay: Controls the amount of time before the echoes (i.e. 200 milliseconds, 300 milliseconds). Increasing this control will simulate the effects of a larger space.
MP3 Player:
- Play: Press during play to pause; press button again to resume play.
- Stop: Press during play to stop current track.
- Repeat: Press during play to repeat current song. Press again to repeat all songs. Press again to exit repeat mode.
- Next button: Press to go to next track.
- Previous button: Press to go to previous track.
Play LED: Indicates MP3 player is on.
Repeat One/All LED: Indicates repeat mode is on.
LED Power Indicator
Master Volume: Controls overall volume of the mixer.
CD/Tape Volume: Controls volume of line input.
USB Port: Inserting a USB flash drive will set the RPM45 to USB mode and it will automatically begin to play music.
Please Note: The RPM45 will not recognize USB drives formatted in the NTFS format. Drives must be formatted in the FAT or FAT32 formats.
Phantom Power Button (red LED indicates power on): When activated, this allows condenser microphones to function, while not affecting dynamic microphones. Please advise certain (ribbon) microphones can be damaged if used with phantom power.
⚠️Never unplug or plug in microphones while phantom power is on. It can cause severe damage to the mic. When phantom power is turned off, it is recommended you wait approximately 7 seconds so as to allow time for the voltage to completely dissipate.
MP3 Volume: Controls USB input volume.

Numbered rear panel diagram of the Rockville RPM45 powered mixer, detailing power controls, fuse housing, speaker outputs A and B, effects return, line output, and RCA tape inputs/outputs.

Power: ON/OFF Switch
IEC AC Power Socket: 110-120V 50-60Hz AC voltage required.
User Serviceable T 4A/120V Fuse (4 Amp 120 Volt 5x20mm Fast Blow Fuse)
¼˝ Speaker Outputs: TS Jacks supports up to two 8-ohm speakers, or a single 4-ohm speaker.
Warning: Do not operate below rated minimum impedance (i.e. using two 4-ohm speakers).
¼˝ Effect Return: Unbalanced line input connects the mixer to the output of an external effects device which is receiving an unamplified main mix signal from the LINE OUT jack.
¼˝ Line Out: Used to connect a powered subwoofer or to send the line signal to an external device.
RCA Tape Input: Used to connect line level sources such as DJ controllers, mixers, samplers, CD players, cassette decks, DAT machines, MP3 players, etc.
RCA Record Out: Sends signal to a recording device, interface or any other device with line input.

Setup

In this setup there is a powered subwoofer connected to the ¼˝ Out jack and two 8-ohm speakers connected to the ¼˝ 8-Ohm Speaker Outputs on the back of the unit.

In this setup there is a powered stage monitor connected to the ¼˝ Out jack and two 8-ohm speakers connected to the ¼˝ 8-Ohm Speaker Outputs on the back of the unit.

Connections

Once your speakers are hooked up, there are a variety of ways to use the RPM45's many inputs and outputs. Diagrams for the outputs are located on the next page.

Please note: Line level consumer devices such as CD players, tape decks, etc. will require an RCA to ¼˝ cable.

System connection diagram for the front panel of the Rockville RPM45 4-channel powered mixer, illustrating XLR microphone inputs and alternative 1/4-inch instrument or line-level source routing.

System connection diagram for the rear panel of the Rockville RPM45 4-channel powered mixer, illustrating external effects routing, line-level media input options, and audio recording outputs.

Operation

USB Operation

Inserting a USB flash drive or an SD card into the corresponding port/slot will set the RPM45 to USB/SD mode and it will automatically begin to play music.

Please note: 32GB or less USB thumb drives are recommended for compatibility. The RPM45 will not recognize USB drives formatted in the NTFS format. Drives must be formatted* in the FAT or FAT32 formats. Music file formats accepted are MP3, WAV, and WMA. Files must be properly formatted; simply changing the file extension to one of the specified file formats will not work.

Music Playback

Play button: Press to play/pause current track.
Stop button: Press to stop current track.
Next button: Press to go to next track.
Previous button: Press to go to previous track.
MP3 Volume: Use this control to adjust the volume level of MP3 output. Use the Master Volume to adjust the overall level of sound output.

*Formatting: For any issue issues with USB Thumb Drive Playback...
Please follow these formatting instructions to ensure audio/device compatibility:

Insert your 32GB or less USB Thumb Drive (may not be compatible with larger sizes) into a computer (available USB port needed).
Right-Click: USB Thumb Drive
Select: Format Device
It will ask for Format Type...Select FAT32.

**For USB Thumb Drive Playback...
Make sure all music loaded on is MP3, WMA, WAV, FLAC or APE file format.
To cover audio to MP3, WMA, WAV, FLAC or APE:

Mac: Look for iTunes MP3 conversion option in dropdown menus.
PC: Look for iTunes MP3 conversion software available to download or websites that allow you to upload files to be converted.
connecting a USB drive or SD card will override other MP3 input modes.

Features/Specifications

Individual Volume, Reverb, Bass, and Treble controls
Adjustable effects: Echo and Delay
USB Input
MP3 volume control
AUX volume control
Master volume control
Four balanced XLR inputs
Four 1/4˝ TS inputs
One RCA L/R AUX input
One RCA L/R Rec output
One 1/4˝ Effect loop input/output
Two 8-ohm 1/4˝ TRS speaker outputs
AC Input: 120V
+15V phantom power
Fan Vent Cooling System
RMS Power Output: 225w x 2 @ 8 Ohm (parallel mono)
Program Power Output: 450w x 2 @ 8 Ohm (parallel mono)
Peak Power Output: 900w x 2 @ 8 Ohm (parallel mono)

Troubleshooting

Problem	Solution
No power	Make sure the unit is plugged in and the power switch is in the ON position. Check that the power cable is plugged in tightly to the unit. Check and replace the fuse if necessary. See fuse replacement diagram on the next page.
No sound	Check that all appropriate cables are plugged in correctly. Check the Master Volume settings. Check the individual level control of each channel as well as the MP3 volume control and CD/Tape volume control. Be sure your microphone(s) is on.
Noise	Turn down the channel levels one by one. If you don't hear the sound, then the problem is either with the channel or whatever device is plugged into it. Unplug the device(s) to see if the sound disappears. Make sure you are using the proper cables. For ¼˝ cables, there are 3 types: instrument, TS (unbalanced), and TRS (balanced). Check the requirements of the connected gear and make sure you are using the appropriate cable.
Buzzing sound	Make sure you are using a proper cable. For ¼˝ cables, there are 3 types: instrument, TS (unbalanced), and TRS (balanced). Check the requirements of the connected gear and make sure you are using the appropriate cable.
No USB playback	Make sure your USB flash drive is not damaged. Make sure the USB drive is formatted as FAT or FAT32. Drives formatted as NTFS are not recognized. Make sure the files are properly formatted (WAV, MP3, WMA). Check that the files on the media device are not corrupt.

Related to

RPM45 Owner's Manual