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Universal Audio Volt 4 Gen 2 is a 12-in / 6-out USB audio interface with 32-bit / 192 kHz conversion, two Tone Shaping Preamps, two front-panel Hi-Z instrument inputs, additional line I/O, ADAT or S/PDIF optical input for eight more channels, MIDI In and Out, a full colour Smart Display and Assistive Auto-Gain with Clip Protection. It is USB bus powered and class compliant for Mac, Windows, iPad and iPhone.
The top of the horizontal Gen 2 range, with the connections a growing setup runs out of first.
Volt 4 is a next generation mobile USB audio interface with onboard Tone Shaping Preamps, a Smart Display and expanded inputs, giving music creators the sound of a pro studio with easy, hands-on control.
Built by the same team behind the Apollo interfaces, Volt 4 makes recording effortless. Set vocal, guitar and stereo instrument levels perfectly with Auto-Gain. Connect MIDI keyboards and drum machines, and expand the studio over ADAT. When it is time to mix, you get an award winning suite of UAD plug-ins and the LUNA digital audio workstation.
Bigger ideas need more connections. Volt 4 gives you studio grade mic / line and Hi-Z instrument inputs, adds MIDI for controllers and synths, and carries an onboard USB hub so a controller can draw power from the interface instead of the laptop.
Volt 4 at a Glance
| Format | Desktop USB audio interface, bus powered |
| Simultaneous I/O | 12-in / 6-out |
| Mic preamps | Two, 60 dB available gain, digitally controlled, with Tone Shaping |
| Tone Shaping modes | Warmth, Focus, Shine |
| Conversion | 32-bit, up to 192 kHz |
| Instrument inputs | Two front-panel Hi-Z |
| Line I/O | Line inputs 3-4 and line outputs 3-4 |
| Digital input | ADAT or S/PDIF optical, up to eight channels |
| MIDI | In and Out, 1/8 inch TRS mini-jack, MIDI Type A |
| Display | Full colour Smart Display |
| Level assistance | Assistive Auto-Gain with Clip Protection |
| Headphone outputs | One stereo, one cue mix |
| Connection | USB Type-C, USB 2.0 class compliant, onboard USB hub |
| Software included | UAD Volt Studio Bundle and LUNA |
Who Is Volt 4 For?
Volt 4 is for the hobbyist whose setup has outgrown two inputs. If you have synths, a drum machine, an outboard preamp or a MIDI controller sitting on the desk, this is the Gen 2 model with somewhere to plug them in. The ADAT input means you can add eight more channels later without replacing the interface. If you want onboard compression while tracking, look at the Volt Max models.
What Do the Tone Shaping Preamps Sound Like?
Every Volt preamp has a TONE button. Off is a clean preamp with 60 dB of transparent gain. Three further voicings colour the signal on the way in, drawn from the tube, solid state and British Class-A preamps in Universal Audio's own catalog, so the character lands on the recording rather than waiting for a plug-in.
US tube voicing. Thick, dark and warm.
US solid-state voicing. Mid-focused and tight.
British Class-A voicing. Balanced, with sparkle.
How Do Auto-Gain and Clip Protection Work?
Two assistive features handle the part of recording nobody enjoys. Auto-Gain listens to the source and sets the preamp for you. Clip Protection sits underneath and catches peaks you did not plan for. The Smart Display shows what is happening while you play, rather than after.
Listens to the source and sets preamp gain for you.
Catches unexpected peaks so a loud moment does not ruin the take.
Input and output metering, channel linking and settings at a glance.
What I/O Does Volt 4 Have?
| Instrument inputs 1-2 | 1/4 inch TS unbalanced, 1 Megohm, 60 dB available gain |
| Microphone inputs 1-2 | XLR combo jack, pin 2 positive, 2 Kilohms, +48V switchable per channel |
| Line inputs 1-4 | 1/4 inch combo jack, TRS balanced or TS unbalanced, 10 Kilohms, gain on channels 1 and 2 |
| Monitor and line 3-4 outputs | 1/4 inch TRS balanced, DC coupled |
| Headphone output | One stereo, 1/4 inch TRS, DC coupled, one cue mix |
| Digital / optical | ADAT or S/PDIF optical input. ADAT gives 8 channels at 44.1 and 48 kHz, 4 channels at 96 kHz and 2 channels at 192 kHz with S/MUX. S/PDIF gives 2 channels at all supported rates |
| MIDI | In and Out, 1/8 inch TRS mini-jack, MIDI Type A |
| USB | One USB 2.0 host port, one USB hub port supplying 5VDC at 0.5A maximum, one USB external power input, USB Type-C connectors |
What Software Comes with Volt 4?
Every Volt includes a curated set of UAD plug-ins and instruments, the same software used to make and mix records for decades, plus LUNA, Universal Audio's digital audio workstation with analog emulation and tools that shorten the setup work. Bundle contents are subject to change without notice.
| UAD Volt Studio Bundle | LUNA Digital Audio Workstation, Topline Vocal Tune, UA 610 Tube Preamp & EQ Collection, Century Tube Channel Strip, Teletronix LA-2A Tube Compressor, UA 1176 Classic FET Compressor, Pure Plate Reverb, Galaxy Tape Echo, Oxide Tape Recorder, Vibe Analog Machines, PolyMAX Synth, Anthem Analog Synth, UAD Lion '68 Super Lead Amp, UAD Showtime '64 Tube Amp |
| Additional software | Melodyne Essential by Celemony, Ampeg SVT-VR Classic Bass Bundle by Plugin Alliance (SVT-VR Classic, bx_Tuner, bx_Masterdesk_Classic), Virtual Drummer DEEP by UJAM, Virtual Bassist DANDY by UJAM, Splice INSTRUMENT, Prisma Producer Lab by UVI, FL Studio Producer Edition for three months |
What Are the Full Volt 4 Specifications?
| Supported sample rates | 44.1, 48, 88.2, 96, 176.4 and 192 kHz |
| Bit depth | 32 |
| Instrument input dynamic range | 116 dB, A-weighted |
| Instrument input maximum level | 13 dBu |
| Microphone input dynamic range | 118 dB, A-weighted |
| Microphone input THD plus noise | -110 dB, 0.0003 percent at 1 kHz |
| Microphone input maximum level | 14 dBu |
| Line input dynamic range | 119 dB, A-weighted |
| Line input maximum level | 22 dBu |
| Monitor and line output dynamic range | 126 dB, A-weighted |
| Monitor and line output maximum level | 20.2 dBu |
| Monitor output impedance | 200 Ohms |
| Headphone output dynamic range | 116 dB, A-weighted |
| Headphone output power | 45 mW into 32 Ohms, 24 mW into 300 Ohms |
| USB bus powered | Yes |
| Power consumption at 5VDC | 4.2W typical, 5.8W maximum |
| On / off switch | Yes, rear panel |
What Do I Need to Run Volt 4?
| Mac | macOS 12 Monterey or newer, Intel or Apple silicon, available USB 2.0 or higher port |
| Windows | Windows 10 64-bit or newer, Intel or AMD processor, ASIO driver from the UA Connect app |
| iPad and iPhone | iPadOS or iOS 16 or newer |
| DAW compatibility | All major DAWs, including Ableton Live, FL Studio, GarageBand, Logic Pro and Pro Tools |
Lightning equipped iPhone and iPad models need an Apple Lightning to USB Camera Adapter. Devices with USB-C connect directly. Windows systems use the ASIO driver available in the UA Connect app. Bus power requirements vary by model and device.
Which Volt Is Right for You?
Six models share the same converters, the same 60 dB preamps and the same software. They differ in how many sources you record at once, whether the preamps also compress, and what you can plug into the back.
Why Universal Audio
Universal Audio has been building recording equipment since 1958, when Bill Putnam Sr. designed the 610 console and the 1176 limiter that are still the reference for the sound of a record. The modern company builds the Apollo interfaces, UAD plug-ins and the LUNA digital audio workstation. Volt takes the preamp voicings and dynamics algorithms from that catalog and puts them in a bus powered box that fits beside a laptop.
Frequently Asked Questions
How much I/O does Volt 4 Gen 2 really have?
Twelve inputs and six outputs at once. That is two mic / line channels, two more line inputs, eight channels of ADAT optical input, a stereo monitor pair, line outputs 3 and 4, and a stereo headphone output.
Can I use the ADAT port as an output?
No. The optical port on Volt 4 Gen 2 is an input only, switchable between ADAT and S/PDIF. Use it with an external eight channel preamp or a Volt 876 in standalone mode.
Does Volt 4 Gen 2 need a power supply?
No. Volt 4 is USB bus powered from your computer. There is a separate USB-C external power input requiring 5VDC at 1A minimum if a device cannot supply enough bus power, and a rear panel power switch.
What software comes with Volt 4 Gen 2?
The UAD Volt Studio Bundle, including the LUNA digital audio workstation, Teletronix LA-2A, UA 1176, UA 610 preamp and EQ collection, Century Tube Channel Strip, Pure Plate Reverb, Galaxy Tape Echo, Oxide, Vibe Analog Machines, PolyMAX and Anthem synths, plus Lion '68 and Showtime '64 amps. Additional third party software is also included. Bundle contents are subject to change.
Is this a genuine Universal Audio product?
Yes. Victory is a veteran owned dealer in Miami and units ship new in original packaging.
Is Volt 4 covered by a warranty?
Yes. The unit carries the full Universal Audio manufacturer warranty. Register it with Universal Audio after purchase and keep your receipt.
Why Victory Musical Instruments
Victory Musical Instruments is a Miami pro audio and musical instrument dealer. We are an authorized retailer for Universal Audio, we hold manufacturer pricing on every line we carry, and we answer the phone. Call 844-687-4208 for system advice or a quote.