ART MX821S
MRP - Rs. 23,390
ART MX821S eight channel mic / line 1U mixer: mains input 95-125 V AC only (use a step-down transformer on 230 V), 8 XLR mic inputs with +48 V. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
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Specifications
| Type | Eight channel mic / line mixer with stereo outputs |
| Inputs | XLR female balanced (mic, channels 1‑8); 1/4 inch TS unbalanced (line, channels 1‑8); RCA unbalanced (Aux Bus In, left and right) |
| Outputs | 1/4 inch TRS balanced (main outputs, left and right); RCA unbalanced (Prefade Out, left and right) |
| Input impedance | 2 kΩ (mic), 20 kΩ (line), 51 kΩ (Aux Bus In) |
| Output impedance | 200 Ω (main outputs, balanced); 100 Ω (Prefade Out) |
| Maximum input level | -4 dBu (mic), +22 dBu (line) |
| Maximum output level | +24 dBu (balanced), +18 dBu (unbalanced) |
| Maximum gain | 54 dB (mic), 29 dB (line) |
| Frequency response | 20 Hz - 20 kHz (+0, -1 dB) (CH 1‑8 in, main out) |
| Total harmonic distortion | < 0.01 % at 1 kHz, typical |
| Signal to noise ratio | > 99 dB typical (ref. 0 dBu) |
| CMRR | > 43 dB typical |
| Phantom power | Switch selectable, +48 V DC (regulated and filtered), 7 mA current limiting per leg |
Power and physical
| Power requirements | USA: 95‑125 V AC, 50‑60 Hz, < 15 W |
| Mains in India | Mains input 95‑125 V AC only (official ART specification): use a suitable step‑down transformer on 230 V Indian mains |
| Format | 1U, 19 inch rackmount steel chassis |
| Dimensions (H x W x D) | 4.5 x 48.3 x 15.2 cm (1.75 x 19 x 6 inch) |
| Weight | 2.9 kg (6.3 lb) |
Product overview
The ART MX821S is an eight channel mic / line rackmount mixer with stereo outputs, offering the most mic preamps of any ART rack mixer in a single rack space.
Each channel has an XLR mic input with switchable phantom power, an unbalanced 1/4 inch line input and independent level and pan controls. The line input can also be converted into a direct output by adjusting internal jumpers. The master level knob controls the balanced 1/4 inch outputs, and a pre-fader output and aux input with stereo RCA connections allow several units to be chained, an additional stereo source to be added, or a mix to be sent to a recording device that is unaffected by master level changes in the room. Simple and streamlined, the MX821S can serve as a standalone solution or add connectivity to an existing system, on stage, in the studio or in permanent installations such as conference rooms, boardrooms, churches, restaurants and clubs.
Power: mains input 95-125 V AC only (official ART specification): use a suitable step-down transformer on 230 V Indian mains.
| Mic inputs, switchable +48 V | 8 x XLR |
| Line inputs, level and pan | 8 x 1/4 inch |
| Balanced 1/4 inch TRS main outputs | +24 dBu |
| Signal to noise ratio, typical | > 99 dB |
Key features
- Eight input channels with individual level and pan controls
- Pan controls place each mono input anywhere in the stereo image
- Balanced mic XLR or unbalanced 1/4 inch TS input on each channel
- +48 V low-noise phantom power, switchable for each microphone input
- Balanced left and right 1/4 inch TRS main outputs with master level control
- Prefade Output and Aux Bus Input jacks to chain units for extra inputs
- Line inputs convertible to direct line outputs with internal jumpers
- Rugged 1U rack-mount steel chassis with built-in power supply
Eight mic / line channels
Each of the eight female XLR inputs accepts a balanced microphone signal and adds 26 dB of gain for low output microphones; rear DIP switches apply +48 V phantom power to each mic input individually, limited to 7 mA per leg. Each 1/4 inch jack accepts an unbalanced line level signal. Both inputs of a channel feed a mono signal that the front Pan control places anywhere between left and right, and a red Clip LED shows peaks.
Outputs and chaining
The Master Level control sets the balanced 1/4 inch TRS main outputs. The stereo RCA Prefade Out is not affected by the master level, so it can feed a recorder or the next unit in a chain, and the stereo RCA Aux Bus In accepts another MX821S or an additional stereo source. Internal jumpers can turn the line input of any channel into a direct line output for that channel, while its mic signal stays in the main mix.
In the box
- MX821S mixer
ART MX821S: frequently asked questions
How many microphones can it take?
Eight, one balanced XLR input per channel, each with switchable +48 V phantom power.
Can I chain several units?
Yes. The Prefade Output and Aux Bus Input RCA jacks chain units to provide extra inputs.
Can I get individual channel outputs?
Each line input jack can be converted to a direct line output with internal jumpers, as described in ART's manual.
What mains voltage does it need?
ART's official specification is 95-125 V AC, 50-60 Hz, under 15 W. On 230 V Indian mains use a suitable step-down transformer.
Where can I buy the ART MX821S in India?
The ART MX821S is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: Panel discussion with up to eight microphones
Conference rooms, boardrooms and seminar halls.
Connections
| Connect | To |
|---|---|
| Microphones | Mic inputs 1 to 8 (XLR) |
| Main outputs (1/4 inch TRS) | Amplifier or powered speakers |
Setup
- Switch on phantom power for condenser microphones with the rear DIP switches.
- Set each channel level and pan; turn unused channels fully down.
Tip: Keep channel levels up so the clip LEDs light only briefly on the loudest passages, and set the room level with the Master Level.
Workflow 2: Recording the mix independently of the room level
Houses of worship and event venues recording their programme.
Connections
| Connect | To |
|---|---|
| Prefade Out (RCA) | Recorder input |
Setup
- Connect the Prefade Out to the recorder.
- Change the Master Level for the room as needed: the recording feed is not affected.
Tip: The prefade output is taken before the master level control.
Workflow 3: Sixteen microphones with two units
Larger stages and installations needing more inputs.
Connections
| Connect | To |
|---|---|
| Prefade Out of the first MX821S | Aux Bus In of the second MX821S |
| Main outputs of the second unit | Amplifier |
Setup
- Chain the units with stereo RCA cables.
- Use the second unit's Master Level for the overall level.
Tip: Prefade Output and Aux Bus Input jacks are made for chaining units.
Workflow 4: Adding a stereo playback source
Venues mixing background music with microphones.
Connections
| Connect | To |
|---|---|
| Music player | Aux Bus In (RCA) |
Setup
- Connect the player to the Aux Bus In.
- Set the player's level for the desired balance with the microphones.
Tip: The Aux Bus In takes a stereo source or another unit.
Workflow 5: Stereo placement of a band or choir
Stage and studio users mixing several microphones to stereo.
Connections
| Connect | To |
|---|---|
| Microphones or line sources | Channels 1 to 8 |
| Main outputs | Main mixer or recorder |
Setup
- Use the Pan controls to place each source between left and right.
- Balance the channels with their Level controls.
Tip: Fully counterclockwise is left, fully clockwise is right.
Workflow 6: Installing the MX821S in India
Installers fitting the MX821S into a 19 inch rack.
Connections
| Connect | To |
|---|---|
| Mains (via step‑down transformer) | MX821S AC input |
Setup
- Mount the 1U chassis in the rack.
- Power it within the official 95-125 V AC range.
Tip: Mains input 95-125 V AC only (official ART specification): use a suitable step-down transformer on 230 V Indian mains.
