Radial Engineering USB-Pro Stereo USB Laptop DI

Radial Engineering USB-Pro Stereo USB Laptop DI

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The USB-Pro Stereo USB Laptop DI from Radial Engineering is a high-resolution stereo direct box, designed to convert sound files from a laptop computer and seamlessly transfer them to a pair of balanced audio outputs to feed a PA, recording, or broadcast mixing console.

With the plug-and-play functionality, this easy-to-use unit automatically configures itself for use with all popular operating systems including Mac OS X, Windows XP, Vista, and Windows 7, thus eliminating the need to load special drivers. Unlike devices that are limited with 16-bit, 44.1 kHz conversion rates, it elevates the performance with true 24-bit, 96 kHz stereo converters to deliver more headroom and greater detail. This eliminates the need for additional sound cards or separate converters when transferring files, further streamlining production in busy work environments.

Connection from the laptop is done via the pro-audio standard USB type-B port. Digital-to-analog conversion is monitored with the built-in headphone amplifier to ensure the signal is being properly downloaded and converted. A mono-sum switch may be engaged to check for phasing or facilitate signal distribution to 2 outputs should this be preferred. You can simply set the output volume control to suit your needs. Should hum or buzz caused by ground loops be encountered, the 2 set & forget side-access switches let you insert isolation transformers into the signal path to block stray DC voltage offsets. To further reduce susceptibility to noise, this is augmented with a ground lift switch that lifts pin-1 on the 2 XLRs.

It is designed to handle the rigors of professional touring. Radial’s unique book-end design creates protective zones around the switches, connectors, and controls to keep them out of harm's way. I-beam construction on the inside assures the sensitive internal PC board will not torque, which could otherwise cause premature part failure. A full bottom no-slip pad in this unit provides mechanical isolation and electrical insulation.

Features:
  • High-performance 24-bit/96 kHz stereo direct box
  • Automatically installs without the need of a driver
  • Built-in headphone amplifier for monitoring
  • Balanced Lo-Z outputs with switchable isolation
Circuit Type Custom decoder with analog line drive
USB Compatibility USB 2.0 full speed
Bit Depth 24-bit (16-bit capable)
Sampling Rate 96 kHz (44.1 kHz / 48 kHz auto sensing)
Files Supported WDM, MME, ASIO, CoreAudio, and DirectSound support
Software Compatibility Windows XP/Vista/Win7/Mac OS
Frequency Response 5 Hz to 40 kHz (30 Hz to 18 kHz with isolation)
Dynamic Range >90 dB
Noise Floor <-90 dBu
Gain +8 dBu (maximum)
Total Harmonic Distortion 0.01%
Stereo Separation 75 dBu
Output Impedance 300 Ω (nominal)
Digital Input USB connector B-type
Analog Output Stereo balanced mic level (2 x XLR-M)
Headphone Output 3.5mm TRS
Level Control Variable, works on headphone, and XLR outputs
Isolation Switchable for each channel
Features Mono Switch: Sums left / right inputs to mono Ground Lift: Lifts pin-1 on both XLR outputs
Power USB bus powered 500 mA maximum
Construction 14 gauge steel chassis and outer shell, baked enamel finish
Dimensions 3.3 x 5.0 x 2.0" (83.8 x 127.0 x 50.8 mm)
Weight 24.0 oz (680.4 g)
Packaging Info
Package Weight 1.8 lb
Box Dimensions (LxWxH) 6.4 x 4.4 x 2.9"

Shipment processing time

  • All orders are processed within 2-3 business days.
  • Real-time order tracking information will be sent via SMS and EMAIL once your order has been successfully processed and captured.
  • Standard/Free shipping does not include delivery on weekends or holidays.
  • Deliveries on weekend and holidays can be arranged at an extra charge to customer.

If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone. We appreciate your patience!

Shipping rates & delivery estimates

Orders below R850 does not qualify for free shipping.

Please factor in a nominal nationwide economy road 2-3 Day ETA charge of R150.

Shipment method

Estimated delivery time

Shipment cost

Economy Road

2-3 business days

Free / R850 and above

Everyday shipping as per Economy Road freight, we work with a few different courier companies and special services are available. Please request any service which’ll be the most convenient for you and Technical Sales will gladly investigate it and revert for your consideration.

* Overnight delivery is only available for orders with delivery addresses within South Africa and confirmed before 10AM the given morning.

Delivery delays can occasionally occur, your Technical Sales Rep will keep you up to date.