UNiKA UZ-25II Zone Distribution Mixer User Manual

UZ-25II
OPERATIONS MANUAL
Zone Distribution Mixer

1. Power Switch – Press this switch to turn the power ON or OFF.
2. Source Indicator – Showing the input signal from Line 1/Line 2.
The function description from ZONE 1 to ZONE 5:
3. Line 1 Level Control – Controls the input level for Line 1.
4. Input signal level indicator – -25dB, -20dB, -15dB, -10dB & CLIP indicators.
5. Line 2 Level Control – Controls the input level for Line 2.
6. Stereo/Mono switch – To select Stereo or Mono mode with LED indicator. 7. Input Jacks for Line 2 – Two XLR input jacks for left & right channels.
8. Input Jacks for Line 1 – Two XLR input jacks for left & right channels.
9~13. XLR Output Jacks – There are either 5 sets of stereo output channels or 10 mono channels.
14. A/C Power Input – IEC AC power inlet connector, plug the cable into a standard 110V or 220V wall outlet.
15. Fuse holder – The fuse holder is for the fuse inside.

INTRODUCTION

The UZ-25II is designed for remote volume control of multiple amplifiers or powered speakers in a distributed audio system. Two stereo sources are available to each of the five output zones. Each source input pair handles separate left and right balanced line-level signals. Each output zone features independent level control from inputs 1 and 2, stereo/mono selector with mono indicator, LED level metering, and left and right balanced line level zone outputs. All audio connections are balanced XLR. The built-in power supply and single high 19” rack mount format allow for easy installation and reliable operation.

What Is A Zone Distribution Mixer?

The use of multiple power amplifiers, each driving one or more speakers, or multiple powered speakers is now commonplace in most distributed audio systems. Whether the installation is a club, a hall, a restaurant, a church, an arena, an office, a recreational facility, or even a portable PA with distributed speakers, systems like this offer the potential to balance the audio level throughout the coverage area. You can adjust the volume of every amplifier or powered speaker, either in groups or individually, from a centralized location with a zone distribution mixer like the Model UZ-25II. Basically, the input of the Model UZ-25II is connected to the PA mixer’s line- level output (the Model UZ-25II will accept the output of two mixers or stereo signal sources) and the power amps or powered speakers are connected to the Model UZ-25IIs zone outputs. As you adjust the volume for each zone within the system the independent LED level metering gives a quick visual reference to the level variations throughout the system.

FEATURES

• Left and right balanced Source 1 and 2 Inputs, accept stereo or mono signal sources.
• Source 1 and 2 input channels are internally routed to all five Zone channels.
• Five Zone channels each feature Source 1 and 2 level controls and left and right balanced output XLR connectors.
• The stereo/Mono selector on each zone sums left and right into Mono mode when engaged.
• Mono indicator LED on each zone channel indicates that mono has been selected.
• Five LED level metering (-25dB, -20dB, -15dB, -10dB, Clip) on each zone channel indicate signal activity for each zone.
• Source 1 and 2 indicator LEDs show you when the signal is present in each source channel.

SPECIFICATIONS

Input Connections: XLR-F balanced (4)
Output Connections: XLR-M balanced (10)
Input Impedance: 44K Ohms balanced, 22K Ohms unbalanced
Output Impedance: 600 Ohms
Maximum Input Level: +22dB balanced
Maximum Output Level: +22dB balanced
Maximum Gain: +6dB
Signal to Noise Ratio: >100dB Typical
THD: <0.03%
Power Requirements & Power Consumption: Switchable,110V-120V/60Hz or 220V- 240V/50Hz,15 Watts
Dimensions: ( HxWxD mm ) ( 44.5 x 483 x 171 )
Weight: 5.34 lbs. ( 2.5kg )

OPERATION

a) Verify proper voltage selection on the IEC style power connector for your location. Connect the AC cord to a grounded AC outlet.
b) Using balanced XLR cables connect the balanced stereo output of the primary audio source (mixer) to the UZ-25II’s left & right Line 1 In source connectors. Alternately a mono signal source can be connected to either L or R input. Repeat the process with Line 2 In the source for an additional mixer or another audio source.
c) Using balanced XLR cables connect the Zone Out connectors to the inputs of the appropriate power amplifiers and/or powered speakers.
d) In many situations the Stereo/Mono selector would be in the Mono position. There are two reasons for this. Firstly, stereo separation works well in the home where the listener can be situated more exactly between the speakers to hear each one equally. But away from that environment in a club, restaurant, office, rec hall, etc, listeners often find themselves closer to one speaker than the other. Stereo separation can cause a situation where you primarily hear just part of the program e.g., guitar but no keyboard or vice-versa. With the system in Mono mode, all of the program music comes out of all of the speakers. Secondly, if you connect a mono source to one of the Left or Right Source Input connectors then switch one or more zones into Stereo, that source will only come out of the amp/speakers connected to the Left or Right Zone outputs. People not situated close to those speakers may not be able to hear that source at all.
e) Adjust the Source level controls to produce the desired volume in each area. If a CLIP indicator lights, reduce either that Zones level control or the output of the signal source to prevent distortion.
f) The LED level indicators in each Zone show the relative signal level for that Zone.
g) The Source Indicators 1 and 2 lights show the signal activity of each source.

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