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Allen & Heath ZED-428 28-Channel 4-Bus Analog Mixer with USB Connection
he Allen & Heath ZED-28 is a 28-channel analog mixer offering versatile I/O and a user-friendly workflow for use in home and project studio recording, houses of worship, and live sound reinforcement. The 24 mono channels feature Neutrik XLR mic and 1/4" line inputs, DuoPre preamps with phantom power and bountiful gain, 1/4" insert points, and 4-band EQ with sweepable mids, while the two stereo channels have 1/4" inputs and 4-band EQ with fixed mids.
Features:
- 24 mono channels
- 2 dual stereo inputs with 4-band EQ
- Neutrik mic XLR
- Neutrik 1/4 inch jacks
- Channel insert
- Super wide gain ‘DuoPre’ mic line input
- 4-band EQ with 2 swept mids and in/out switch
- Illuminated mute
- Sound image pan
- Illuminated PFL & peak warning indicator
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Technical Specification
- Total # Of Inputs: 28
- Mic/Line Inputs:
- 24 x 3-Pin XLR Female Mic Inputs (Balanced)
- 24 x 1/4" TRS Line Inputs (Balanced/Unbalanced)
- Stereo Line Inputs: 4 x 1/4" TRS Line Inputs (Two Stereo Pairs, Balanced/Unbalanced)
- In-Line Inputs/Returns: No
- Aux Sends: 6 x 1/4" TRS Mono (Balanced)
- Aux Returns: 4 x RCA Coaxial Line Inputs (Two Stereo Pairs, Unbalanced)
- Inserts:
- 24 x 1/4" TRS on Mono Channels (Unbalanced)
- 4 x 1/4" TRS on Group Buses (Unbalanced)
- 2 x 1/4" TRS on Stereo Main Bus (Unbalanced)
- 1 x 1/4" TRS on Mono Main Bus (Unbalanced)
- Channel Direct Out: 24 x 1/4" TRS (Balanced)
- BUS (Group) Outputs:
- 4 x 1/4" TRS Group Outputs (Balanced)
- 2 x 1/4" TRS Matrix Outputs (Balanced)
- Main Outputs: 3 x 3-Pin XLR Male (One Stereo Pair and One Mono, Balanced)
- Monitor Outputs:
- 1 x 1/4" TRS Stereo Headphone Output (Unbalanced)
- 1 x 1/8" / 3.5 mm TRS Stereo Headphone Output (Unbalanced)
- 2-Track I/O:
- 2 x RCA Coaxial 2-Track Input (One Stereo Pair, Unbalanced)
- 2 x RCA Coaxial 2-Track Output (One Stereo Pair, Unbalanced)
- ALT I/O: 1 x USB Type-B (2-Channel Send/Return)
- Talkback Mic Input: 1 x 3-Pin XLR Female (Balanced)
- EQ Section:
- High (All Channels): ±15 dB Shelving Filter at 12 kHz
- High-Mid (Mono Channels): ±15 dB Peaking Filter at Selectable Frequency (500 Hz to 15 kHz, Sweepable)
- High-Mid (Stereo Channels): ±15 dB Peaking Filter at 2.5 kHz
- Low-Mid (Mono Channels): ±15 dB Peaking Filter at Selectable Frequency (35 Hz to 1 kHz, Sweepable)
- Low-Mid (Stereo Channels): ±15 dB Peaking Filter at 250 Hz
- Low (All Channels): ±15 dB Shelving Filter at 80 Hz
- High-Pass Filter: 12 dB/Octave at 100 Hz, Switchable
- Solo/Mute: Mute and PFL Solo
- Channel Level Control: 100mm Fader
- Trim/Gain Control: Rotary Control
- Gain Range:
- Mic Inputs: -6 to +63 dB
- Line Inputs: -10 to +26 dB
- Stereo Inputs: -∞ to +10 dB
- Faders: -∞ to +10 dB
- Returns: -∞ to +10 dB
- Aux Masters: -∞ to +10 dB
- Matrix Levels: -∞ to +6 dB
- Phantom Power: +48 VDC, Selectable per Channel
- Metering:
- Dual 12-Segment LEDs
- 4-Segment LED per Group Output
- 4-Segment LED per Main Output
- Signal LED per Channel
- Peak LED per Channel
- USB Specification: USB 1.1 Compliant
- Bit Depth: USB: 16-Bit
- Sample Rates: USB: 32 kHz, 44.1 kHz, or 48 kHz
- Nominal Input Level:
- Mic Input: -63 to +6 dBu
- Mono Line Input: -26 to +10 dBu
- Stereo Line Input: 0 dBu (+10 dB with Control Off)
- Insert Point: 0 dBu
- Maximum Input Level:
- Mic Input: +17 dBu
- Mono Line Input: +30 dBu
- Insert Point: +21 dBu
- Nominal Output Level:
- XLR Main Outputs: +4 dBu
- Group Outputs: +4 dBu
- Aux Outputs: -2 dBu
- Matrix Outputs: -2 dBu
- Inserts: -2 dBu
- 2-Track Output: 0 dBu
- Direct Output: 0 dBu
- Maximum Output Level:
- XLR Main Outputs: +27 dBu
- Group Outputs: +27 dBu
- Aux Outputs: +21 dBu
- Matrix Outputs: +21 dBu
- Inserts: +21 dBu
- 2-Track Output: +21 dBu
- Direct Output: +21 dBu
- Frequency Response:
- Mic In to Main Out (30 dB Gain): 20 Hz to 20 kHz (+0.5 dB, -1 dB)
- Line In to Main Out (0 dB Gain): 10 Hz to 30 kHz (+0.5 dB, -1 dB)
- Stereo In to Main Out: 10 Hz to 30 kHz (+0.5 dB, -1 dB)
- THD + N:
- Mic In to Main Out (0 dB Gain, 1 kHz, +10 dBu Out): 0.004%
- Mic In to Main Out (30 dB Gain, 1 kHz): 0.014%
- Line In to Main Out (0 dB Gain, 1 kHz, 0 dBu): 0.005%
- Stereo In to Main Out (0 dB Gain, 1 kHz, +10 dBu): 0.003%
- Headroom:
- Analog Headroom from Nominal (0 VU): 21 dB
- USB In and Out Headroom from Nomimal (0 VU): 14 dB
- Noise:
- Mic Pre EIN: -127 dBu (Maximum Gain, 150-Ohm Input, 22 Hz to 22 kHz)
- Mix Noise: -89 dB (-85 dBu) (L/R Out, 24 Channels Routed, Ref +4 dBu, 22 Hz to 22 kHz)
- Power Consumption: 60 W Maximum
- Power Requirements: 100 to 240 VAC, 47 to 63 Hz
- Dimensions (W x H x D): 36.6 x 5.1 x 22.1" / 93.0 x 12.9 x 56.0 cm
- Weight: 40 lb / 18.1 kg
- Warranty: 1 year
What Is In The Box
- Allen & Heath ZED-428 28-Channel 4-Bus Analog Mixer with USB Connection
- USB Cable
- Power Cable
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Manufacture Description
USB AUDIO FLEXIBILITY
Getting audio to and from a computer easily is now a common requirement for live sound and music production. The way this has been implemented on ZED is super-flexible and super-easy! No longer do you need to fiddle around the back of your PC to get to the soundcard inputs, only to find that the levels are all wrong and noisy. Just plug in a USB lead to your ZED, select the USB routing on the mixer and the device on your computer and that’s it! CD quality audio to and from your PC or Mac. Switches and connection through jack socket terminals provide different send/return configurations
MUSIQ
ZED-428 has a tuned 4-band EQ taken from the acclaimed GL2200 mixer, utilising MusiQ – with optimised slope (or Q factor) for equalising individual instruments.
DUOPRE
Based on the proven pre-amps from the hugely successful PA series, ZED-428 has DuoPre pre-amps, which use a two stage design, with carefully controlled amounts of gain in each stage. When amplifying the signal from the XLR input, the gain range is huge – 69dB of range to be exact – and is very evenly distributed around the gain control, meaning better control of signal level. Most of the gain comes from the first stage, so unwanted noise is kept to a minimum. Line level signals are simply plugged into the second stage of the pre-amp by using the line input jack socket, which has the great advantage of less noise when using the line input and also matching to a higher input impedance.