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Precision Tools for Audio Professionals


Model Options


Hand made in Australia






Dual Channel unit 

See the USB audio Knowledge Base
- IMPORTANT essential reading

Bus powered - requires no external power

More Audiboxes:

Blue DI

(USB Plus Analog)

(USB Plus Analog)




ISO Balancer
ISO Balancer-VC

ISO Balancer DI

ISO De-Balancer
ISO Later
ISO Splitter
ISO Combiner
ISO Switcher
ISO Selector

Remote Switcher
Remote Selector

Q Switch

Pro DI
Ear Driver

DI-Plus RC
DI-Plus2 RC


In response to many requests from users of our original USB DI who have been using it for specific applications, ARX is excited to present the new ARX USB DI-HP - everything that the original USB DI was, with the addition of a headphone output with its own level control. It is still a true Plug and Play 24 bit digital to analog pro audio interface, removing the need to use any existing sound card outputs, but now its output level can be monitored quietly and accurately.

Naturally it still features full transformer balanced output isolation to eliminate earth loops / ground hum and other extraneous interaction noise and distortion.

The addition of the headphone output and control allows easy personal monitoring of the audio signal passing through the USB DI-HP without the need for Monitor Loudspeakers.

Plug and Play

The USB DI-HP installs as a fully compatible generic USB audio device, requiring no special driver program installation on Mac OSX, Windows XP, 7/8/10 . However, a quick visit to our  USB Audio Knowledge Base page will give you a very good idea of what USB audio can and can't do.

The front panel has a Type B USB input connector and a Headphone Output Level control. While the USB DI-HP's Transformer Ground isolation provides low-noise operation, an Audio Ground lift switch is also fitted, to minimise/remove ground loop hum. Switch in or out as required.

A status LED on the front panel next to the USB Input indicates that the USB DI-HP is connected and operating.

The rear panel has both 6.5mm (¼ inch) and 3.5mm ((mini-jack) headphone outputs, and two transformer balanced analog audio XLR Line out connectors for connecting to any standard balanced XLR analog input

The USB DI-HP is housed in a heavy duty all-steel chassis finished in attractive matt blue textured powdercoat, with hardwearing epoxy screen printing and slip resistant rubber basepad. It is ideal for interfacing any USB equipped computer (especially notebook computers) with the balanced inputs of professional sound systems.
Security features include Kensington®-type computer lock slot and optional bracket kit for under-table mounting.

The USB DI-HP is available in Dual Channel format, includes a premium quality USB-A to USB-B cable, and is hand made in Australia

T E C H N I C A L || S P E C I F I C A T I O N S


USB-DI HP Specifications

Input Connector USB type B port

Codec 24 bit High Resolution, 44.1 and 48 KHz

Output Impedance 300 Ohms Transformer Balanced

Output Level 0dB

Output Noise
USB - System dependent
ISO transformer - Environment sensitive

Power Operating current via USB Port 80mA

Headphone output specs:

Max. output level 300mW @ 32 Ohms
Frequency Response 20 - 20 KHz ± 0.5 dB
Dynamic range 90dB 'A' Weighted

Frequency Response 20 - 20 KHz ± 0.5 dB

Output Connectors
2 x Male XLR, wired Pin 2 + Hot, Pin 3 – Cold. Pin 1 Chassis Ground

All-steel powdercoated chassis, fibreglass PCB, epoxy printing,
slip-resistant rubber basepad

System Requirements

  • Windows PC running Windows XP, 7/8/10 or Mac running OS X or later
  • USB port

Precision engineered
Most of the Audibox range share a common footprint and manufacturing platform. Offset lid screws enable close side-by-side mounting of multiple units.

Click on image at Right to see larger version

Click Here to go to the USB audio Knowledge Base

Click here to go to the USB DI Questions and Answers page

Click Here for Audibox USB DI info for Win XP

Click Here for Audibox USB DI info for Win 7

Click Here for Audibox USB DI info for Win 8


Thanks for looking at the range of ARX professional audio products. If you would like to contact us, please click on the Email link above.
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