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.
| Product type | Mixers |
| Type | Installations |
| Number of Zones | 4 (Master, Zone A-C) |
| Type | stereo |
| Installation Height | 3 U |
| Total Input Channels | 8 (2x Mic, 1x AUX/Line, 2x Phono/Line, 2x Line, 1x FOH/Line |
| Frequency response | 20 - 40000 |
| Microphone channels | 2 (with phantom power 12 V) |
| Microphone Channel Connections | 6.3 mm stereo jack (2 x balanced) |
| Microphone Channel Connections | XLR |
| Microphone channel controls | 1 x EQ Hi |
| Microphone channel controls | 1 x EQ Low |
| Microphone channel controls | 1 x Talkover |
| Microphone channel controls | 1x EQ Mid |
| Microphone channel controls | 2 x gain |
| Microphone channel controls | 2x On/Off |
| 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 3: 2 x RCA + USB |
| Line input connectors | input 2, 4 5: 2 x RCA |
| Line input connectors | Input 1: 2 x RCA + 3.5 mm stereo jack |
| Line input connectors | input 6: 4 x RCA + 2 x 6.3 mm jack |
| Line Channel Controls | Gain |
| Line Channel Controls | level |
| Line Channel Controls | Cue |
| Line Channel Controls | FOH On |
| Line Channel Controls | 2x Phono/Line |
| Line Channel Controls | AUX enable |
| Line Channel Display Elements | Cue-LED |
| Line Channel Display Elements | Signal/0 dB-LED |
| Line Channel Input Impedance | (Phono) 50 kOhm |
| Line Channel Input Impedance | 6 kOhm |
| Line Channels Input Sensitivity | (Phono) 25m V |
| Line Channels Input Sensitivity | 2.1 V |
| Line Channels THD | (Phono) 0.05% |
| Line Channels THD | 0.02% |
| input sensitivity AUX/Line | 3 V |
| Line outputs | 5 (Master - Stereo, 3x Zone - Mono, Rec - Stereo) |
| Output Connectors Master | 2 x XLR (balanced) |
| Output Connectors Master | Terminal block |
| Output Connectors Master | RCA (x2) |
| Master Controls | EQ Low |
| Master Controls | level |
| Master Controls | T/O Sensitivity |
| Master Controls | EQ Hi |
| Master Controls | EQ Mid |
| Master Controls | Max. Level |
| Master Controls | T/O Damping |
| Master Display Elements | 2 x 10 segment level meter |
| Master Output Levels | (balanced) 24 dBu |
| Master Output Levels | (unbalanced) 17 dBu |
| Zone Output Connections | XLR (balanced) |
| Zone Output Connections | Terminal block |
| Zone Controls | Cue |
| Zone Controls | level |
| Zone Controls | 100 Hz High Pass |
| Zone Controls | Include Mic |
| Zone Controls | Max. Level |
| Zone Controls | EQ Hi |
| Zone Controls | EQ Low |
| Zone Controls | Source |
| Zone Controls | T/O Damp |
| Zone Display Elements | 5-Segment Level Meter |
| Zone Output Levels | 24 (balanced/ unbalanced) dBu |
| Output Connections Rec | 2 x RCA |
| Headphones ouput | 1 |
| Headphone Out Port | 6.3 mm TRS |
| Headphone Output Controls | Cue Volume |
| Headphone Output Voltage | (@ 32 Ohm) 2.5 V |
| 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 |
| Additional Display Elements | Power-LED |
| Operating voltage | 220 - 250 V AC, 50 Hz |
| Mains connector | IEC power connector |
| Power consumption | 25 W |
| Fuse | T 500 mAL / 250 V |
| Width | 485 mm |
| Height | 132 mm |
| Depth | 210 mm |
| Weight | 4.4 kg |
| Accessories (included) | Power cord |
| Accessories (included) | terminal blocks |
