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REDBACK

A 4425 Mixer

Page 4

Proudly Assembled in Australia

Distributed by Altronic Distributors Pty. Ltd. Perth. Western Australia.

Phone: 1300 780 999 Fax: 1300 790 999

Internet: www.altronics.com.au

S

PECIFICATIONS

Inputs:

..............................6 microphone - balanced 200-600

Ω

2 line - unbalanced 100k

Ω

Output:

..................................................600

Ω

 balanced 0dBm

DISTORTION
Mic inputs:

......................................................< 0.3% @ 1KHz

Line inputs:

.................................................. < 0.3% @ 1KHz

FREQUENCY RESPONSE
Mic:

......................................................................30Hz-15kHz

Line:

......................................................................18Hz-23kHz

S/N ratio:

..............................................All controls min. -98dB

Sensitivity:

..............................Mic 1.25mV, line 100mV or 1V

Phantom power:

..........................................Nominal 12V DC

Output connectors:

..................................3 pin XLR balanced

Dual RCA sockets

INPUT CONNECTORS
Mic inputs:

................................................3 pin XLR balanced

Line inputs:

................................................Dual RCA sockets

CONTROLS
Mic inputs:

..................................................................Volume

Line inputs:

..................................................................Volume

Bass:

..............................................................±10dB @ 100Hz

Treble:

............................................................±10dB @ 10kHz

Master:

........................................................................Volume

Indicators:

........................................................Power on LED

Power supply:

..........................................240V AC or 24V DC

Dimensions:

......................................482W x 152D x 44H mm

Weight:

............................................................................

3kg

Colour:

............................................................................Black

All measurements measured in respect to 1kHz reference. 
*Specifications subject to change without notice

Summary of Contents for A 4425

Page 1: ...t input This is particularly useful when an input is set for line use as it enables telephone paging radio microphone emergency tones jukebox or similar to mute background music on other inputs Three level priority operates as shown Input 1 Priority 1 mutes inputs 2 8 Input 2 Priority 2 mutes inputs 3 8 Input 3 Priority 3 mutes inputs 4 8 Inputs 4 8 are mixed If the priority function for inputs 1 ...

Page 2: ...nduced into the cables Note that a balanced line uses three wires two signal wires and one screened earth wire or shield where an unbalanced cable uses only one signal wire and a screened earth See the connection details figure 2 for wiring up plugs etc Do not tamper with the unit Warning Mains Voltage is Present Inside Leave servicing to qualified personnel INSTALLING THE TONE GENERATOR A 2073 1 ...

Page 3: ...7 Tape Out R L L R R Voice Over Chime Alert Evac Al Ev Chm1 Com Chm2 L Output A 4425 Rear Panel Layout DIP 7 DIP 6 DIP 5 DIP 4 DIP 3 DIP 2 DIP 1 TROUBLE SHOOTING Fault Symptom No Sound Check that there is power on both the mixer and power amplifier The mixer has a LED light to indicate if there is power Check input and master volume controls are turned up Check all lead connections Fault Symptom W...

Page 4: ...Mic 30Hz 15kHz Line 18Hz 23kHz S N ratio All controls min 98dB Sensitivity Mic 1 25mV line 100mV or 1V Phantom power Nominal 12V DC Output connectors 3 pin XLR balanced Dual RCA sockets INPUT CONNECTORS Mic inputs 3 pin XLR balanced Line inputs Dual RCA sockets CONTROLS Mic inputs Volume Line inputs Volume Bass 10dB 100Hz Treble 10dB 10kHz Master Volume Indicators Power on LED Power supply 240V AC...

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