LD SYSTEMS ZONE 624 – 19″ 4-Zone Mixer 3U

LD Systems ZONE 624 4-Zone Mixer

The ZONE 624 is a fully-equipped zone mixer with 6 line and 2 microphone channels, that can be assigned to a stereo or a mono master output. The compact 3U rack device also has inputs for an external emergency announcement system and remote-controlled switching mute. Due to its extensive connectivity the ZONE 624 is the extremely flexible control centre solution for PA systems in food outlets, clubs, hotels, fitness centres, and many other areas.

The two balanced microphone inputs have a shared 3-band EQ, 12V phantom power and Talkover functions; the Talkover attenuation can be individually set for all zone outputs on the back of the unit. The 6 stereo input channels of the ZONE 624 are equipped with gain control, signal and peak LEDs, 45 mm faders, Cue buttons and RCA connections; channel 6, in addition with balanced TRS inputs for FOH signals. The device also has a switchable Aux input via 3.5mm mini jack and a USB port, that is used as a stereo input and output (recording out) and turns the ZONE 624 into an external audio interface.

The master section outputs are electronically balanced and use XLR connectors and terminal block connectors. The stereo zone also has unbalanced RCA connectors. The maximum output level for all of the zones can be individually set. The three mono outputs of the ZONE 624 each have a 2-band EQ, a selectable 100 Hz high pass filter, and a MIC mute switch with a level indicator; the inputs 1-6 or the stereo master signal can be selected as a source. The stereo output is equipped with a 3-band EQ, a control for the Talkover sensitivity and two LED chain level meters. Furthermore, the ZONE 624 has a recording output and a controllable PFL headphone jack for previewing.

• Type: stereo
• Number of Zones: 4 (Master, Zone A-C)
• Installation Height: 3U
• Total Input Channels: 8 (2x Mic, 1x AUX/Line, 2x Phono/Line, 2x Line, 1x FOH/Line
• Frequency Response: 20 - 40.000 Hz
• Microphone Channels: 2 (with phantom power 12 V)
• Microphone Channels Connections: 2X 6.3 mm jack (balanced), 1x XLR / 6.3 mm jack (Combo)
• Microphone Channel Controls: 2x Gain, 2x On/Off, 1 x EQ Hi, 1x EQ Mid, 1 x EQ Low, 1x Talkover
• Microphone Channels Display Elements: On-LED
• Microphone Channels Input Impedance: 4 kOhm
• Microphone Channels Input Sensitivity: 4.5 mV
• Microphone Channels THD: 0,08 %
• Line Channels: 6 (Input 1: Aux/Line, Input 2 + 5: Line/Phono, Input 3: USB/Line  4: Line, Input 6: Line/FOH
• Line Input Connectors: Input 1: 2 x RCA + 3.5 mm stereo jack, input 2.4 5: 2 x RCA, input 3: 2 x RCA, input 6: 4 x RCA + 2 x 6.3 mm jack
• Line Channel Controls: Gain, AUX enable, Cue, Level, 2x Phono/Line, FOH On
• Line Channels Display Elements: Signal/0 dB-LED, Cue-LED
• Line Channel Input Impedance: 6 Kohm (Phono 50 kOhm)
• Line Channels Input Sensitivity: 2,1 V (Phono 25 mV)
• Line Channels THD: 0,02 % (Phono 0,05%)
• input sensitivity AUX/Line (3.5 mm stereo jack): 3 V
• Line Outputs: 5 (Master - Stereo, 3x Zone - Mono, Rec - Stereo)
• Master Output Connectors: 2 x XLR (balanced), RCA (2 x), Terminal Block
• Master Controls: Level, EQ Hi, EQ Mid, EQ Low, Max. Level, T/O Sensitivity, T/O Damping
• Master Display Elements: 2 x 10 segment level meter
• Master Output Levels: 24 dBu (balanced), 17 dBu (unbalanced)
• Zone Output Connections: XLR (balanced), Terminal Block
• Zone Controls: Level, Source, Cue, EQ Hi, EQ Low, Max Level, 100 Hz High Pass, Include Mic, T/O Damp
• Zone Display Elements: 5-segment level meter
• Zone Output Levels: 24 dBu (balanced/ unbalanced)
• Output Connections Rec: 2 x RCA
• Headphone Output: 1
• Headphone Out Port: 6.3 mm jack stereo
• Headphone Output Controls: Cue Volume
• Headphone Output Voltage: 2,5 V 32 Ohm
• Additional Inputs: 2 (Emergency Input, Output Mute)
• Additional Input Connections: Terminal Block
• Additional Input Controls: Level Emergency Input
• Emergency Input Sensitivity: 5 V
• Additional Controls: power switch
• Additional Display Elements: Power-LED
• Operating Voltage: 220 - 250 V AC, 50 Hz
• Power Socket: IEC power socket
• Power Consumption (max.): 25 W
• Fuse: T 500 mAL / 250 V
• Dimensions (W x H x D): 485 x 132 x 210 mm
• Accessories included: terminal blocks, power cable, operating instructions

• Gain settings at backside
• Special front input for phone/mp3 devices
• Zone control for 3 balanced outputs
• 2 Mic, 11 Line inputs

• Type: live, installation
• Channels: 8
• Mono input channels, line: 6
• Stereo line input connectors: 4x XLR, 2x 6.3 mm jack
• Mono line input type: electronically balanced
• Stereo input channels, line: 1
• Stereo line input connectors: 2 x XLR
• Stereo line input type: electronically balanced
• Input impedance: 50000 ohms (balanced), 25000 ohms (unbalanced)
• Maximum input level: + 21 dBu
• Nominal working level: -10 dBV to +4 dBu
• Mono output channels: 6
• Mono output connectors: 4x XLR, 2x 6.3 mm jack
• Mono output type: electronically balanced
• Stereo output channels: 1
• Stereo output connectors: 2x XLR
• Stereo output type: electronically balanced
• Output impedance: 60 ohms (balanced), 30 ohms (unbalanced)
• Maximum output level: + 22 dBu
• Frequency response: 5 Hz - 40000 Hz
• THD: 0,0008 %
• S/N ratio: 85 dB
• Controls: Main Input Level, Main Output Level, Main Link, Level Channel 1-6, Bal/Pan Channel 1-6, Splitter/Mixer Channel 1-6, Power
• Indicators: Input Level LED Indicator (6-segment), Output Level Indicator (6-segment), In/Out Level Channel 1-6 (6 -segment), Power
• Operating voltage: 220 - 240 V AC, 50 - 60 Hz
• Power socket: IEC power socket
• Power consumption: 15 W
• Fuse: T 315 mAL, AC 250V
• Dimensions (W x H x D): 483 x 44.5 x 216 mm
• Accessories included in package: power cord

The ZONE 423 is a full featured zone mixer with 4 line and 2 microphone channels, that can be assigned to a master and a zone output, as well as inputs for an external emergency announcement system and remote-controlled switching mute. Through versatile connectivity, the compact 2U rack device is the perfect control centre for PA systems in food outlets, clubs, hotels, fitness centres, and is also excellent for presentations and DJs.

In addition to the two balanced microphone inputs with variable Gain and Talkover level,12V-phantom power, and a shared 3-Band-EQ, the ZONE 423 offers Line, Phono-, and Aux-stereo connections in RCA format, a FOH-input with balanced stereo jack plugs as well as a USB and 3.5mm mini jack. The USB-port is used as a stereo input and output and allows the mixer to be used as an external audio interface. The four input channels have individual gain controls with signal and peak value display, 45 mm faders for adjusting the volume and cue buttons.

The master and zone sections each have their own EQ, balanced XLR and unbalanced RCA outputs: the master output via terminal block connectors and the zone output using a mono sum switch, and 100 Hz high-pass filter. The stereo level indication can be set to master or zone, and the maximum output level can be preset for both on the back of the mixer. In addition to an adjustable headphone connection for pre-listening, the ZONE 423 also has a recording output.

• Type: stereo
• Number of Zones: 2 (Master, Zone)
• Installation Height: 2U
• Total Input Channels: 6 (2x Mic, 1x Line/Aux, 2x Line/Phono, 1x Line/FOH)
• Frequency Response: 20 - 40.000 Hz
• Microphone Channels: 2 (with phantom power 12 V)
• Microphone Channel Connections: 6.3 mm stereo jack (balanced), XLR / 6.3 mm jack (Combo)
• Microphone Channel Controls: Gain, On/Off, 1 x EQ Hi, 1 x EQ Low, 1 x Talkover, 1 x Talkover Level
• Microphone Channels Display Elements: On-LED
• Microphone Channels Input Impedance: 4 kOhm
• Microphone Channels Input Sensitivity: 8 mV
• Microphone Channels THD: 0,07 %
• Line Channels: 4 (Input 1: USB/Line, Input 2 + 3: Line/Phono/CD, Input 4: Line/FOH)
• Line Input Connectors: Input 1: 2 x RCA + 3.5 mm stereo jack + USB, input 2 + 3: 4 x RCA, input 4: 4 x RCA + 2 x 6.3 mm jack
• Line Channel Controls: Gain, Source, Cue, Level, Enable FOH
• Line Channel Display Elements: Signal/0 dB-LED, Cue-LED
• Line Channel Input Impedance: 6 Kohm (Phono 60 kOhm)
• Line Channels Input Sensitivity: 1 V (Phono 10 mV)
• Line Channels THD: 0,03 % (Phono 0,05 %)
• input sensitivity AUX/Line (3.5 mm stereo jack): 3 V
• Line Outputs: 3 (Master - Stereo, Zone - Stereo/Mono, Rec - Stereo)
• Output Connectors Master: 2 x XLR (balanced), RCA (2 x), Terminal Block
• Master Controls: Level, EQ HI, EQ Mid, EQ Low, Max. Level
• Master Display Elements: 2 x 10 segment level meter (switchable Master/Zone)
• Master Output Levels: 21 dBu (balanced), 18 dBu (unbalanced)
• Zone Output Connections: 2 x XLR (balanced), RCA (2 x), Terminal Block
• Zone Controls: Level, Source Input 2 - 4/Mix, EQ Hi, EQ Low, Max Level, 100 Hz High Pass, Mono
• Zone Display Elements: 2 x 10 segment level meter (switchable Master/Zone)
• Zone Output Levels: 21 dBu (balanced), 18 dBu (unbalanced)
• Output Connections Rec: 2 x RCA
• Headphone Output: 1
• Headphone Out Port: 6.3 mm jack stereo
• Headphone Output Controls: Cue Volume
• Headphone Output Voltage: 1,2 V 32 Ohm
• Additional Inputs: 2 (Emergency Input, Output Mute)
• Connections Additional Inputs: Terminal Block
• Additional Input Controls: Level Emergency Input
• Input Sensitivity Emergency Input: 5 V
• Additional Controls: power switch
• Operating Voltage: 220 - 250 V AC, 50 Hz
• Power Socket: IEC power socket
• Power Consumption (max.): 22 W
• Fuse: T 500 mAL / 250 V
• Dimensions (W x H x D): 483 x 89 x 210 mm
• Accessories Included:    terminal blocks, power cable, operating instructions

LD Systems ZONE 622 2-Zone Mixer

The ZONE 622 is a particularly compact 1U zone mixer with 6 line and 2 microphone channels, that can be assigned to a stereo or a mono master output. The device has all the essential functions, an input for an external emergency announcement system with its own volume control, and a connection to the remote-controlled switching mute. The ZONE 622 is suitable as a sound system for separate zones in restaurants, clubs, hotels, fitness centres, and for presentations.

The two balanced microphone channels with stereo jack inputs are equipped with controls for Gain, Talkover volume, Talkover attenuation, 12V phantom power and a shared 2-band EQ. The line channels 1 and 2 can also be used to connect unbalanced microphones, and channel 6 is specially designed for balanced FOH signals. The stereo input channels of the ZONE 622 have a Cue button and volume control signal display, and the channels 1-5 have an additional gain trimmer. Furthermore, the zone mixer has a 3.5 mm mini jack input and a USB port , that is used as a Stereo Input and Output (Recording Out). So you can use the ZONE 622 as an external audio interface. 

The stereo and mono output sections have their own meters, 2-band EQ, trimmer for adjusting the maximum output level, as well as electronically balanced jack plugs and terminal block connectors. In addition, the stereo section has unbalanced RCA jacks. An adjustable headphone jack for previewing and a recording output complete the equipment for the ZONE 622.