ART MX225 Stereo Dual Source Five Zone Distribution Mixer

Front Panel Overview

The front panel of the ART MX225 features a clear layout for managing audio distribution across five zones. Each of the five identical zone sections includes controls for adjusting the levels of Source 1 and Source 2 independently. A "STEREO/MONO" selector switch is present for each zone, along with a "MONO" indicator [led] that illuminates when mono mode is engaged. A five-segment LED level meter, indicating signal presence from -25dB to CLIP [overload], provides visual feedback for each zone. Additionally, "SOURCE 1" and "SOURCE 2" indicator [led]s confirm signal activity for each source input. The rear panel, not visually depicted but described in specifications, houses the input and output connectors, power input, and fuse holder.

Introduction

The MX225 is engineered for remote volume control of multiple amplifiers or powered speakers within a distributed audio system. It provides two stereo sources to each of its five output zones. Each source input pair accommodates separate left and right balanced line-level signals. Every output zone offers independent level control for inputs 1 and 2, a stereo/mono selector with an accompanying mono indicator [led], LED level metering, and balanced left and right line-level zone outputs. All audio connections utilize balanced XLR connectors. The integrated power supply and a standard 19-inch rack-mount format facilitate straightforward installation and dependable operation.

What Is A Zone Distribution Mixer?

The utilization of multiple power amplifiers, each driving one or more speakers, or multiple powered speakers, is now a common practice in most distributed audio systems. This applies to installations in clubs, halls, restaurants, churches, arenas, offices, recreational facilities, or even portable PA systems with distributed speakers. Systems like this enable the balancing of audio levels throughout the entire coverage area. The Model MX225 allows for the adjustment of volume for every amplifier or powered speaker, either collectively or individually, from a central location. Essentially, the MX225's input connects to the PA mixer's line-level output (it can accept outputs from two mixers or stereo signal sources), while power amplifiers or powered speakers connect to the MX225's zone outputs. The independent LED level metering provides a clear visual reference of level variations across the system as you adjust the volume for each zone.

Features

• Left and right balanced Source 1 and 2 Inputs, accepting stereo or mono signal sources.
• Source 1 and 2 input channels are internally routed to all five Zone channels.
• Five Zone channels, each featuring Source 1 and 2 level controls and balanced left and right output XLR connectors.
• A Stereo/Mono selector on each zone sums left and right into Mono mode when engaged.
• A Mono indicator [led] on each zone channel signifies when mono mode is selected.
• Five LED level metering indicators (-25dB, -20dB, -15dB, -10dB, CLIP [overload]) on each zone channel display signal activity.
• Source 1 and 2 indicator [led]s show when signal is present in each source channel.

Specifications

Operation

1. Verify the correct voltage setting on the IEC style power connector for your region. Connect the AC power cord to a grounded AC outlet.
2. Using balanced XLR cables, connect the balanced stereo output of your primary audio source (e.g., a mixer) to the MX225's left and right Line 1 In source connectors. Alternatively, a mono signal source can be connected to either the L or R input. Repeat this process for Line 2 In, connecting an additional mixer or audio source.
3. Connect the Zone Out connectors to the inputs of the appropriate power amplifiers and/or powered speakers using balanced XLR cables.
4. In many installations, the Stereo/Mono selector is best set to the Mono position. This is for two primary reasons. Firstly, while stereo separation is effective in environments like a home where listeners are positioned precisely between speakers for equal sound, this is often not the case in clubs, restaurants, offices, or rec halls where listeners may be closer to one speaker than another. Stereo separation can lead to hearing only parts of the audio program (e.g., guitar but not keyboard, or vice versa). In Mono mode, the entire program music is output to all speakers. Secondly, if a mono source is connected to either the Left or Right Source Input connector and one or more zones are set to Stereo, that source will only be heard from the speakers connected to the corresponding Left or Right Zone outputs. Listeners not positioned near those specific speakers might not hear the source at all.
5. Adjust the Source level controls to achieve the desired volume in each zone. If a CLIP [overload] indicator illuminates, reduce the zone's level control or the output level of the signal source to prevent distortion.
6. The LED level indicators in each Zone display the relative signal level for that specific Zone.
7. The Source Indicator 1 and 2 [led]s indicate signal activity for each respective source.

Warnings

All operating instructions should be read before using this equipment.

[caution] To prevent the risk of electrical shock, do not remove the cover or the back panel. There are no user-serviceable parts inside. Refer all servicing to a qualified service technician.

Do not expose this unit to rain or moisture, or to heat sources such as radiators, stoves, or other items that generate excessive heat.

This unit should be cleaned only with a damp cloth. Do not allow moisture to enter the unit.

When moving this equipment, it should be placed in its original carton and packing to minimize the risk of damage during transit.

Warranty Information

Limited Warranty

Applied Research and Technology (ART) will provide warranty and service for this unit in accordance with the following terms:

ART warrants to the original purchaser that this product and its components will be free from defects in workmanship and materials for a period of three years from the date of purchase. ART will, at its option and without charge, repair or replace defective products or component parts upon prepaid delivery to the factory service department or an authorized service center, accompanied by proof of purchase (a valid sales receipt).

Exclusions:

This warranty does not cover damage resulting from misuse, abuse, or unauthorized alterations or repairs. The warranty is void if the serial number is altered, defaced, or removed.

ART reserves the right to make design changes or additions/improvements to this product without obligation to incorporate these changes into previously manufactured products.

ART shall not be liable for any consequential damages, including but not limited to damages resulting from loss of use. Some states do not permit limitations on incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty grants specific legal rights, and you may have other rights that vary by state.

For units purchased outside the United States, an authorized distributor of Applied Research and Technology will provide service.

Service

The following information is provided in the unlikely event that your unit requires service:

1. Ensure the unit itself is the cause of the problem. Verify that the unit has power, all cables are connected correctly, and the cables are in working condition. Consulting with your dealer for assistance in troubleshooting or testing your specific configuration may be helpful.
2. If you suspect the ART unit is at fault, visit www.artproaudio.com. You can contact Customer Service for further assistance or request a Return Authorization for service via the "resources" section of the website.
3. When returning the unit for service, pack it in its original carton or a suitable substitute. The original packaging might not be adequate as a shipping carton, so consider placing the packaged unit in an additional box for shipping. Clearly print the Return Authorization (RA) number on the outside of the shipping box.
4. Include a note with your unit detailing the RA number and your contact information, including a daytime phone number. It is recommended to attach this note to the top of the unit.