Palmer River Spree

Active Stereo USB-C DI Box for Professional Audio Systems

This active stereo USB-C DI box is designed to connect laptops, smartphones, or tablets directly to mixers, stageboxes, and PA systems. It converts USB-C audio into two balanced XLR signals and delivers high-resolution sound with D/A conversion up to 32-bit/192 kHz.

High Audio Quality and Noise-Free Signal
D/A conversion up to 32-bit/192 kHz
Galvanically isolated XLR outputs
Optimal impedance matching for lossless, linear signal transmission
Signal-to-noise ratio: 112 dB
Frequency response: 20 Hz – 20,000 Hz
Ground lift function for reduced hum and interference

Flexible Connectivity
1 x USB-C input
2 x balanced XLR outputs (L/R)
1 x 6.3 mm TRS headphone output
Switchable output level: Mic / Line
Status indicators for SIGNAL, SYNC, and POWER

Practical Power Supply
Powered via USB-C or included external power adapter
USB-C power pass-through when using the external power supply
Ability to power a connected smartphone or tablet simultaneously

Robust Construction for Stage and Touring
Aluminium and steel housing
Powder-coated black finish
Transformer-isolated design with 1:1 ratio
Designed for professional stage and touring use
Engineered in Germany

Technical Specifications
Type: Active stereo DI box
Number of channels: 2
Number of inputs: 1
Number of outputs: 2
Input connection: USB-C female
Line outputs: 2 x 3-pin XLR male
Headphone output: 1 x 6.3 mm TRS female
Maximum output level: 18 dBu
Balanced output impedance: 600 Ω
Max THD+N (1 kHz): 0.015%
Max THD+N (30 Hz): 0.015%
Max IMD: 0.001%
Operating voltage: 12–18 V DC via external power supply or 5 V DC / 500 mA via USB
Power consumption: 5 W
Operating temperature: -10 °C to 70 °C
Maximum humidity: 80%

Dimensions & Weight
Width: 140 mm
Height: 50 mm
Depth: 128 mm
Weight: 575 g

Included
USB cable
Rubber feet
Tour label