The Mackie 2404VLZ4 24-Channel 4-Bus FX Mixer with USB from the VLZ4 4-Bus Series features Onyx microphone preamps in a high-headroom / low-noise 4-bus design with a feature set suitable for live sound. The mixer is equipped with dual 32-bit RMFX+ effect processors, each with 24 effects including tap delay. It also includes compression on dedicated channels and subgroups that allow for simple, sweet dynamic control.

24-channel 4-bus mixer featuring Mackie signature high-headroom/low-noise design
20 boutique-quality Onyx mic preamps
- Ultra-wide 60dB gain range
- 128.5 dB dynamic range
- +22 dBu line input handling
- Extended frequency response
- Distortion under 0.0007% (20Hz – 50kHz)
Improved RF rejection perfect for broadcast applications
Phantom power for condenser mics
Dedicated inline channel compression for critical inputs (ch. 17-20)
20 high-headroom line inputs with dedicated inserts
3-band EQ with sweepable midrange
18 dB/oct 100Hz low-cut filter on mic input channels
Level, pan, solo and overload/mute LEDs on each channel
4 subgroups featuring dedicated inline compressors for total dynamic control
6 aux sends with inserts, pre/post fader and internal/external FX send options
2 stereo returns and 4 group outs with inserts
Dual 32-bit RMFX+™ processors featuring 24 “Gig Ready” reverbs, choruses and tap delay for live applications
Integrated 4×2 24-bit USB interface
- Stream subgroups or master L/R to your PC or Mac for recording
- Use your favorite plug-in live via auxes 5/6
- Convenient stereo return to mains for music playback or return to channel to implement EQ, auxes and more
PFL/AFL solo modes
60mm long-wearing log-taper faders
High-resolution 12-segment stereo meters
Sealed rotary control resist dust and grime
“Built-Like-A-Tank” rugged steel chassis with powder-coat finish
High-visibility, high-contrast controls deliver convenient “at-a-glance” visual feedback
Universal power supply for worldwide use

Noise	Main Mix Noise: Main Mix Fader at Unity, Channel Faders Down: -87 dBu (-91 dB signal to noise ratio, ref +4 dBu) Main Mix Fader at Unity, Channel Faders at Unity: -81.5 dBu (20 Hz to 20 kHz bandwidth, 1/4" main out, channel gains at unity, channel EQs flat, all channels assigned to main mix, odd channels panned left, even channels panned right)
Total Harmonic Distortion (THD)	Microphone In to Insert Send: <> Microphone In to Main Out: <> (1 kHz at 15 dB gain, 20 Hz to 20 kHz bandwidth)
Crosstalk / Attenuation	Channel Mute Switch Engaged: -90 dBu Channel Fader Down: -88 dBu (1 kHz relative to +10 dBu, 20 Hz to 20 kHz bandwidth, microphone in, 1/4" main out, gain at unity)
Frequency Response	Microphone input to main output (gain at unity) +0, -1 dB, 20 Hz to 50 kHz +0, -3 dB, <10 hz="" to="">100 kHz
Equivalent Input Noise	150 Ω Termination: -128.5 dBu, 20 Hz to 20 kHz Microphone input to insert send out, maximum gain
Common Mode Rejection Ratio	Better than -70 dB at 1 kHz
Maximum Level	Microphone In: +21 dBu All Other Inputs: +21 dBu Main Mix XLR Out: +27 dBu All Other Outputs: +21 dBu
Impedance	Microphone In: 2.7 kΩ Channel Insert Return: 2.5 kΩ All Other Inputs: 10 kΩ or greater Tape Out: <10> All Other Outputs: 120 Ω
Equalizer	3-Band EQ (Mono Channels): High Shelving: ±15 dB at 12 kHz Mid Peaking: ±15 dB sweep 100 Hz to 8 kHz Low Shelving: ±15 dB at 80 Hz Low Cut Filter: 18 dB/octave, -3 dB at 100 Hz 4-Band EQ (Stereo Channels): High Shelving: ±15 dB at 12 kHz Hi Mid Peaking: ±15 dB at 2.5 kHz Low Mid Peaking: ±15 dB at 400 Hz Low Shelving: ±15 dB at 80 Hz
USB	Format: USB 1.1 I / O: Stereo Input, 4-Channel Output A / D / A: 24 bit, 44.1 kHz / 48 kHz
Power Consumption	55 W, 100 to 120 VAC, 50 to 60 Hz
Operating Temperature	32 to 104°F (0 to 40°C)
Dimensions	Height: Front: 1.8" (46.3 mm) Rear: 6" (153 mm) W x D: 29.4 x19.1" (748.0 x 486.0 mm)
Weight	31.0 lb (14.1 kg)