The USB Audio Interface for Guitarists
Polar 4
Polar 4
Specs
Specs
Microphone Preamps: 4
Inputs: 48V phantom power 6x6 Loopback Input
Midi: MIDI In / Midi Out - 8 Pin DIN
Outputs: 3.5mm headphone output
Power: USB-C + internal battery (6 hours)
Connectivity: Dual USB-C ports (power and data), Windows
Dimensions: 230 x 64 x 115 mm
Weight: 0.93 kg
Audio Resolution: 24-bit / 192kHz
Supported: 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bundled Software: POLAR Control App, St. James Plugin Suite, Ableton Live Lite, ReLab LX480 Essentials Reverb, Melodyne Essential
Description
Description
POLAR is the go-to audio interface for guitarists that seek the ultimate recording guitar tone.
POLAR 4 is a 4 channel USB audio interface built by guitarists for guitarists. It features 4 high headroom FET input channels for instrument, line and microphone, two high output headphone outputs, +48V phantom power for condenser microphones, balanced outputs for professional monitoring, visual level meters, a MIDI In and Out port and the proprietary “Enhance” switch.
POLAR comes bundled with the studio software collection including the full St. James Plugin Suite and everything you need to start recording now!

The Audio Interface for Guitarists
POLAR is THE audio interface that is specially designed to enhance your guitar DI signal in a way that brings back the coveted feel and response of playing through a real valve guitar amplifier.
Incredible Tone
POLAR is equipped with FET instrument inputs, providing ultra-low noise and high headroom for the best sonic foundation for your guitar tone.
No Digital Clipping, SetLevels With Ease
With “Enhance” activated, you can capture guitar levels without worrying about digital clipping. This feature allows you to drive POLAR’s preamps like a real valve amp, making level adjustments easy and ensuring smooth handling of dynamic guitar signals, thus avoiding harsh tones and ruined takes.
Feels Like A Real Amp
“Enhance” restores the touch, feel, and response of playing through a real amp. When the Enhance switch is engaged on the instrument input, a unique circuit is introduced that mimics the input stage of a real valve amplifier, including all of it’s non-linear behaviours and characteristics.
World-Class Microphone Preamp
World-Class Microphone Preamp
Inspired by renowned vintage studio preamps, POLAR’s microphone preamps deliver warm, rich tones and authentic character, enhancing the overall depth and quality of your sound.
Engaging “Enhance” gently lifts the top end of your signal, bringing out the natural clarity and air from vocal performances, acoustic instruments, and more.
Everything You Need to Record Guitar and Vocals
Everything You Need to Record Guitar and Vocals
POLAR comes with a studio software collection including the St. James Plugin Suite (worth $129/£129/€129), Ableton Live Lite, ReLab LX480 Essentials Reverb, Melodyne Essential and more. Start making music now.
Additional Connectivity
The POLAR 4 boasts an additional line level Output 3 & 4, along with a second Headphone output featuring its own volume knob for seamless and intuitive control. This dual headphone output allows for the creation of two independent mixes and monitoring levels.
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POLAR Control
Blackstar’s versatile Polar Control mixing software is included, offering zero-latency monitoring and “loopback”, streamlining your signal routing workflow and eliminating the need for bulky hardware mixers, saving space in the studio and simplifying the recording and mixing process for an all-in-one solution.
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A Versatile Interface
With ultra-low noise and high headroom, POLAR effortlessly accommodates a wide range of microphone and instrument types, empowering the musician to achieve studio-quality recordings in any environment.
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MIDI
Exclusive to POLAR 4 is a MIDI In and Out port, enhancing the versatility of input/output options for musicians and producers who integrate MIDI devices into their creative workflows.
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Headphone and Monitor Outputs
POLAR features high-output headphone amps and balanced monitor outputs each with their own level control, making it easy to mix levels when playing and recording.
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Power
POLAR 4 can run directly from your computer using USB 2.0 bus power with the supplied USB-A to USB-C cable. If your USB ports don't have enough power, you can instead use the DC 5V Input. Additionally there is a +48V switch for microphones that require phantom power.