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Mackie DJ Mixer & Grado Headphone Combo

8-Channel ONYX-i Series Firewire Studio Recording Mixer + Prestige Series Dynamic Open-Air Headphones

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Mackie DJ Mixer & Grado Headphone Combo

8-Channel ONYX-i Series Firewire Studio Recording Mixer + Prestige Series Dynamic Open-Air Headphones


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Mackie ONYX-820i Features
  • 8-channel premium analog mixer with integrated 24-bit/96kHz FireWire I/O
  • Qualified by Mackie for use with all major DAWs, including:
    • Pro Tools M-Powered™ 8 (requires upgrade)
    • Logic
    • SONAR
    • Cubase
    • Ableton Live
    • Final Cut Pro
  • 3 Onyx boutique-quality mic preamps
  • 3-band Perkins EQ with sweepable mids on mic/line channels
  • 3-band Perkins EQ on stereo line channels
  • Hybrid mono/stereo channel with 4-band Perkins EQ
  • 8x2 FireWire routing, including aux sends and pre/post EQ assignment for all channels
  • Stereo playback from DAW, returned to control room or into channel for integration into mix
  • Built-in DI on first two channels for direct connection of guitars, bass, etc.
  • Individual 48V phantom power switches on all mic inputs
  • Talkback section with built in mic and flexible routing
  • “Planet Earth” switching power supply for worldwide use
  • Optional rack kit available
  • 2 aux sends with pre/post assignment
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Grado SR225i Features
  • Prestige Series Stereo Headphones
  • Dynamic driver transducer with open air operation
  • Lightweight, wired design
  • Vented diaphragm and non-resonant air chamber for greater sound detail
  • High-quality 8-conductor cable for improved control of upper and lower frequencies
  • Each driver is designed with a large soundstage
  • Balanced frequency playback
  • On-ear design with soft, comfortable ear cushions
  • Thick copper cable for excellent signal transfer
  • UHPLC copper voice coil wire
  • Straight Y cord attaches directly to each ear can
  • Soft headband for comfortable and listening sessions
  • Customized, adjustable headband fits any head comfortably
  • Gold-plated, corrosion-resistant stereo jack
  • Large 1/4" plug for use with DJ and professional equipment
  • Replacement ear cushions available: Grado LCUSH
  • Made in the USA
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty
Grado SR225i Specifications
  • Frequency Response: 20-22,000 Hz
  • Sensitivity: 98dB
  • Nominal Impedance: 32 Ohm
  • Driver matched dB: .05
  • Cord Length: 5.5 ft.
  • Cable Type: Straight Y
  • Plug Size: 1/4" (6.3mm)
  • Plug Construction: Gold plated

Mixer Features

The type of circuitry the mixer is comprised of as either Analog or Digital.
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
20 - 20000 Hz
THD (Total Harmonic Distortion)
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
The number of individual channels that can simultaneously pass audio.
The ability to mount the mixer to a 19" rack.
Phantom Power
The +48V of DC power supplied to condenser microphones by all, none, or individual mic preamps on the mixer.
The width of the item from left to right (side-to-side) measured in inches.
The height of the item, measured from top to bottom, in inches.
The front-to-rear depth of the item, in inches. If the item is angled or slanted, this value is the bottom measurement.


Main Outs
The main two channel audio output of the mixer
CRTL Room/ALT Outs
The control room or alternative outputs from the mixer.
Direct Outs
The number of direct outputs from individual channels on the mixer.
Headphone Outs
The number of headphone outputs the mixer supports.
Aux Sends
The number of auxiliary sends available on the mixer.
The number of channel inserts found on the mixer. Channel inserts are TRS jacks found inline on the mixer channel strip used to insert signal processing into a mixer channel by transmitting a send and return on the tip and ring of a TRS - x2 TS insert cable.
Bus/Subgroup Outs
The number of bus or subgroup outputs the mixer supports.
Mic-Pre Inputs
The Number of mic level inputs the mixer can accept.
Line Inputs
The Number of line level inputs the mixer can accept.

Digital Features

Digital Recording Interface
The ability for a mixer to be used as a recording interface as well as the required connection.
Digital Signal Processing
On board Digital Signal Processing effects that can be assigned to auxs, busses, channels, or the main mix.
Digital Outs
The number of digital outputs the mixer supports.
Digital Inputs
The number of digital inputs the mixer supports.
Digital Audio Resolution
The sample rates and bit depths supported by the digital converters of the mixer.

Powered Features

Total Max Power
This is the combined max power output of all the amplifier's channels.
Continuous Power @ 8 ohm (Bridged)
This is the continuous (RMS) power output of the amplifier at a bridged 8 ohm impedance.
Continuous Power @ 4 ohm
This is the continuous (RMS) power output of the amplifier at an 4 ohm impedance.
Continuous Power @ 8 ohm
This is the continuous (RMS) power output of the amplifier at an 8 ohm impedance.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Mackie DJ Mixer & Grado Headphone Combo