Universal Audio Volt 4 Max - USB Audio Interface
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Features
- Tone Shaping Preamps. Get the rich, full character of a record, not a demo.
- Max Processing. Record with classic compressor presets tuned for vocals, guitar, and bass.
- Full 32-Bit Audio. Capture your performance in incredible detail, with legendary UA quality.
- Expanded I/O. Capture your vocals and instruments simultaneously, connect external hardware over MIDI, and add inputs over ADAT.
- Smart Display. Select channels and set levels fast, with bright visual feedback.
- Auto-Gain & Clip Protection. Never worry about signal peaks ruining your take again.
- Easy to Use. Quickly connect and record using your favorite music apps.
- Premium UAD Software. Get the same EQs, compressors, synths, and guitar amps used by the pros, plus the award-winning LUNA DAW.
Details
- 12-in / 6-out desktop USB audio interface with professional 32-bit / 192 kHz audio conversion
- Two Tone Shaping Preamps with 60 dB gain and three harmonic character modes — Warmth, Focus, and Shine — for the rich sounds of classic analog mic preamps at the source
- Max Processing — onboard realtime compression with six musical presets for vocals, guitars, and bass, modeled on classics like the LA-2A and 1176
- Over 18 character combinations by pairing Tone and Max, all completely noise-free
- Two mic / line inputs with two front-panel Hi-Z instrument inputs, plus additional line I/O for external gear
- Speaker switching between two sets of monitors (Main and Alt)
- Built-in talkback microphone for effortless studio communication
- ADAT or S/PDIF optical input for up to eight channels of digital expansion, plus MIDI In and Out
- Onboard USB hub for connecting peripherals and powering external MIDI controllers
- Full-color Smart Display for bright, at-a-glance visual feedback, including gain-reduction metering
- Auto-Gain and Clip Protection for perfect recording levels, every time
- Two studio-quality headphone outputs (with one shared cue mix) for monitoring and collaboration
- Full integration with the UAD Console app and LUNA, including session recall and low-latency cue mixes
- Built-in loopback for podcasting, streaming and content creation
- Independent 48V phantom power per channel for condenser microphones
- USB bus-powered and class-compliant for easy setup with Mac, Windows, iPad, and iPhone*
- Stylish, rugged construction built to withstand years of use

12-In / 6-Out
Tone-Shaping Preamps
Max Processing
Full 32-Bit Audio
Premium UAD Software
Speaker Switching
Built-In Talkback Mic
Easy to Use
Studio Sound at the Push of a Button
Home recordings and phone demos can sound thin and lifeless. Volt Max gives your recordings incredible tone right from the start. With three harmonic mic preamp modes — Warmth, Focus, and Shine — you can quickly add Tube, Solid State, and British Class-A tone to everything you record.
Add Punch with Max Processing
Volt Max lets you punch up your vocals, guitars, bass, and other sources as you track, thanks to Max dynamics processing. With six push-button presets ranging from “Rap Vocals” to “Jangly Acoustic,” you’ll get big, radio-ready sounds based on our venerable 1176 and LA-2A studio compressors. Combined with its three preamp modes, it puts 18 inspiring sonic possibilities right at your fingertips.
Hear Every Detail with 32-Bit Converters
When you capture that perfect take, Volt Max’s best-in-class 32-bit / 192 kHz converters preserve every detail, exactly as it happened. And with loud, clear speaker and headphone outputs, you’ll get the perfect monitoring levels, from your first take to your final mix.
Capture Bigger Ideas with More I/O
With Volt Max, your audio interface never becomes a bottleneck. Use its dual mic and Hi-Z instrument inputs to record multiple vocalists and instruments at the same time. Tap into clean 48V phantom power for your fancy studio condenser mics. Connect your controllers and synths over MIDI. And with ADAT you can add eight more digital inputs, should the need arise.

See the Big Picture with Smart Display
Volt Max’s beautiful full-color Smart Display shows your inputs, levels, and settings in detail. So you spend less time setting up and more time creating.
Get the Perfect Levels with Auto-Gain
Nothing’s worse than a great take wrecked by digital distortion. Auto-Gain sets your recording levels in seconds, and Clip Protection catches unexpected peaks. So you can focus on the performance instead of the meters.

Start Making Music in Minutes
When you’re inspired, every second counts. Thankfully, Volt Max is ready, willing, and USB class-compliant on Mac, Windows, iPad, and iPhone.* No downloads or drivers. Works with any DAW. So you can be up and recording in minutes.

Shape Your Songs with UAD Plug-Ins and LUNA
Ideal for Podcasts and Livestreams
*Requires an Apple Lightning to USB Camera Adapter (except iPhone / iPads with USB-C). Windows systems use the ASIO driver, available in the UA Connect app. Requirements for bus-power vary by model and device.
Specifications
I/O
Simultaneous I/O
12-in / 6-out
Microphone Preamps
Two, 60 dB available gain with Tone Shaping, Harmonic Saturation, and Max Compression
Monitor Outputs
Two stereo (main and alt speaker switching)
Headphone Outputs
Two stereo (one shared cue mix)
USB
One USB 2.0 Host port One USB Hub port for peripherals – supplies 5VDC @ 0.5A maximum One USB External Power input port – requires 5VDC @ 1.5A minimum (3A provided with unit) USB Type-C connectors
Digital / Optical
ADAT or S/PDIF optical input ADAT IN: 8 channels at 44.1 and 48 kHz - S/MUX capable 4 channels at 96 kHz - S/MUX capable 2 channels at 192 kHz S/PDIF IN: 2 channels at all supported sample rates
MIDI
In, Out, 1/8" TRS Mini-Jack MIDI Type A
Talkback
Built-in microphone
A/D – D/A Conversion
Supported Sample Rates (kHz)
44.1, 48, 88.2, 96, 176.4, 192
Bit Depth
32
Power
USB Bus-Powered
Yes
Power Consumption (@ 5VDC)
5.5W typical, 7.1W maximum
On / Off Switch
Yes - Rear Panel
Analog I/O
Instrument Inputs 1-2
Frequency Response
20 Hz to 20 kHz ±0.02 dB
Dynamic Range (A–weighted)
116 dB
THD + Noise (1 kHz @ -1 dBFS)
-108 dB (0.0004%)
Maximum Input Level
13 dBu
Input Impedance
1 Megohms
Available Gain (Digitally-controlled)
60 dB
Connector Type
1/4" TS unbalanced
Microphone Inputs 1-2
Frequency Response
20 Hz to 20 kHz ±0.08 dB
Dynamic Range (A–weighted)
119 dB
THD + Noise (1 kHz @ -1 dBFS)
-110 dB (0.0003%)
Maximum Input Level
14 dBu
Input Impedance
2 Kilohms
Available Gain (Digitally-controlled)
60 dB
Phantom Power
+48V (switchable per channel)
Connector Type
XLR Combo Jack, pin 2 positive
Line Inputs 1-2
Frequency Response
20 Hz to 20 kHz ±0.05 dB
Dynamic Range (A–weighted)
119 dB
THD + Noise (1 kHz @ -1 dBFS)
-108 dB (0.0004%)
Maximum Input Level
22 dBu
Input Impedance
10 Kilohms
Available Gain (Digitally-controlled)
60 dB
Connector Type
1/4" Combo Jack TRS balanced or TS unbalanced
Line Inputs 3-4
Frequency Response
20 Hz to 20 kHz ±0.05 dB
Dynamic Range (A–weighted)
119 dB
THD + Noise (1 kHz @ -1 dBFS)
-108 dB (0.0004%)
Maximum Input Level
22 dBu
Input Impedance
10 Kilohms
Available Gain (Digitally-controlled)
60 dB
Connector Type
1/4" TRS balanced or TS unbalanced
Monitor & Line 3-4 Outputs
Frequency Response
20 Hz to 20 kHz ±0.05 dB
Dynamic Range (A–weighted)
126 dB
THD + Noise (1 kHz @ -1 dBFS)
-112 dB (0.0003%)
Maximum Output Level
20.2 dBu
Output Impedance
200 Ohms
Connector Type
1/4" TRS balanced or TS unbalanced (DC coupled)
Headphone Outputs
Frequency Response
20 Hz to 20 kHz ±0.08 dB
Dynamic Range (A–weighted)
116 dB
THD + Noise (1 kHz @ -1 dBFS into 300Ω)
-103 dB (0.0007%)
Maximum Output Power into 32Ω
45 mW
Maximum Output Power into 300Ω
24 mW
Connector Type
1/4" and 1/8" TRS stereo unbalanced (DC coupled)
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