Rockville RPM45 4-Channel Powered Mixer with USB - Owner's Manual

Introduction

Thank you for purchasing the Rockville RPM45 4-Channel Powered Mixer with USB input. Please read this installation guide carefully for proper use of your Rockville RPM45. For assistance, contact the technical help line at 1-646-758-0144, Monday through Friday, 9am to 5pm EST.

Important Safety Instructions

⚠️ CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN.

To reduce the risk of electric shock, never open the unit. There are no user-serviceable parts; refer service to an authorized Rockville service center.
Do not expose this unit to any kind of moisture.
Ensure the unit is situated in a properly ventilated area.
Make sure the unit is placed on a level and stable surface.

Front Panel Functions

Channel Controls (Channels 1-4)

1. Channel Reverb Control: Controls the amount of reverb added to the input signals.
2. Channel Treble Control: Adjusts treble frequencies ±15dB.
3. Channel Bass Control: Adjusts bass frequencies ±15dB.
4. Microphone/Low Impedance XLR Input: Connect balanced low-impedance microphones (1K ohms). PIN 1 = shield, PIN 2 = positive (hot), PIN 3 = negative (cold).
WARNING: When using condenser microphones, ensure Phantom Power (15V) is switched on.
5. Line/High Impedance 1/4" Input: Use for high-impedance microphones, line-level devices (cassette player, CD player, video projector, laptop), electric guitar, bass, or keyboard. This is a two-conductor input with an impedance of 10K ohms.
6. Channel Volume Control: Controls the volume level for each channel. Acts as a preamp; match levels with source devices.

MP3/USB & Master Controls

7. Master EFFX Controls:
- Volume: Controls the level of effects added to the master mix.
- Echo: Controls the character of the reverb, affecting the decay rate.
- Delay: Controls the delay of the reverb, simulating the effects of a larger room.
8. MP3 Player Controls:
- Play/Pause Button: Press to play or pause the current track.
- Stop Button: Press to stop the current track.
- Repeat Button: Press to repeat the current song, repeat all songs, or exit repeat mode.
- Next Button: Press to go to the next track.
- Previous Button: Press to go to the previous track.
9. Play LED: Indicates the MP3 player is on.
10. Repeat One/All LED: Indicates repeat mode is active.
11. LED Power Indicator: Shows the unit is powered on.
12. Master Volume: Controls the overall volume of the mixer.
13. CD/Tape Volume: Controls the volume of the line input.
14. USB Port: Insert a USB flash drive to automatically play music. Drives must be formatted in FAT or FAT32 format (NTFS is not recognized).
15. Phantom Power ON/OFF Button: (Red LED indicates power is on). Provides +15V for condenser microphones.
16. MP3 Volume: Controls the input volume for the USB source.

Rear Panel Functions

1. Power Switch: Turns the unit ON or OFF.
2. IEC AC Power Socket: Connect the supplied power cord here.
3. Fuse Holder: Contains a user-serviceable fuse. Replace with the same type and rating.
4. Speaker Outputs: Two 1/4" TRS jacks for connecting 4-ohm or 8-ohm speakers.
- ⚠️ WARNING: Do not operate below the rated minimum impedance.
5. Effect Return: 2-conductor 1/4" line input to connect the output of an external effects device.
6. Line Out: 1/4" TRS line output to connect a powered subwoofer or send the line signal to an external device.
7. Tape Input: Used to connect line-level sources such as DJ controllers, mixers, samplers, CD players, cassette decks, DAT machines, MP3 players, etc. Mono audio sources can be connected using an RCA "Y" cable.
8. RCA Record Out: Sends signal to a recording device or any other line-level device.

Setup Examples

The RPM45 can be configured in various ways depending on your needs. Here are common setup examples:

Setup 1: Subwoofer and Speakers

Connect a powered subwoofer to the 1/4" Line Out jack and two 8-ohm speakers to the 1/4" Speaker Outputs on the back of the unit.

Setup 2: Stage Monitor and Speakers

Connect a powered stage monitor to the 1/4" Line Out jack and two 8-ohm speakers to the 1/4" Speaker Outputs on the back of the unit.

Diagrammatic representation of connections:

Rear Panel Connections:

Speaker Outputs (A & B) connect to two 8-ohm speakers.
Line Out connects to a powered subwoofer or stage monitor.
Effect Return connects to an external effects processor.
Tape Input connects to sources like CD players or DJ controllers.
RCA Record Out connects to a recording device.

Front Panel Input Connections:

Microphone/Low Impedance XLR Inputs: For microphones.
Line/High Impedance 1/4" Inputs: For instruments (guitar, bass, keyboard), high-impedance microphones, or line-level devices.
MP3/USB Input: For playback from USB drives or CD/Tape sources.

Note: Line-level consumer devices like CD players or tape decks may require an RCA to 1/4" cable.

Features and Specifications

Individual Volume, Reverb, Bass, and Treble controls for each channel.
Adjustable Echo and Delay effects.
USB Input for direct playback from USB flash drives (FAT/FAT32 format required).
MP3 volume control.
AUX volume control.
Master volume control.
Four balanced XLR inputs for microphones.
Four 1/4" TS inputs for instruments and line-level sources.
One RCA L/R AUX input.
One RCA L/R Rec output for recording.
One 1/4" Effect loop input/output for external effects.
Two 8-ohm 1/4" TRS speaker outputs.
AC Input: 120V.
+15V phantom power for condenser microphones.
Fan Vent Cooling System for reliable operation.
Power Output:
- 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	Ensure the unit is plugged in and the power switch is in the ON position. Check that the power cable is securely connected to the unit. Check and replace the fuse if necessary.
No sound	Verify all appropriate cables are plugged in correctly. Check the Master Volume settings. Adjust individual channel volume controls, MP3 volume, and CD/Tape volume. Ensure your microphone(s) is turned on.
Noise	Turn down channel levels one by one to identify the source of the noise. Unplug connected devices to see if the noise disappears. Ensure you are using the correct cables (instrument, TS unbalanced, TRS balanced) suitable for your connected gear.
Buzzing sound	Ensure you are using a proper cable. For 1/4" cables, check compatibility (instrument, TS unbalanced, TRS balanced) with your connected gear.
No USB playback	Make sure your USB flash drive is not damaged. Ensure the USB drive is formatted as FAT or FAT32. Drives formatted as NTFS are not recognized. Verify that the files on the media device are properly formatted (e.g., WAV, MP3, WMA) and not corrupt.

Fuse Replacement

Follow these steps to replace the fuse:

Use a screwdriver to release the fuse holder.
Remove the fuse holder from the unit.
Carefully remove the old fuse.
Insert a new fuse of the same type and rating.
Re-insert the fuse holder securely into the unit.