At a glance

Type USB bus-powered audio interface, 4 in / 4 out
Inputs 4 × RCA, switchable line or phono (built-in phono preamps and ground post); 1 × ¼″ microphone input with gain control
Outputs 4 × RCA; 1 × ¼″ headphone output with level control
Metering Blue signal-present LEDs on all four inputs and all four outputs, plus a phono-mode LED
Sample rates 44.1 kHz and 48 kHz, 16 bit
Drivers Low-latency ASIO on Windows, Core Audio on macOS
Power USB, 5 V / 500 mA — no external supply
Dimensions 118.9 × 125 × 46.5 mm (4.7 × 5 × 1.8 in)
Weight 385 g (13 oz)
In the box eBox-44, USB cable, two RCA cables, installation CD, manual

Connections

Inputs 1–4 — RCA. Line and phono level devices are both supported.
Phono / Line switch — set to PH when turntables are connected to inputs 1–4, and LN for everything else. The phono LED confirms phono mode.
Ground post — connect your turntable's ground cable here.
Outputs 1–4 — RCA to your mixer's inputs. Routing is set in your software.
Microphone input and volume — ¼″ jack with its own gain control.
Headphone jack and volume — for monitoring inputs while recording.
USB port — data and power, over the supplied cable.

Audio specifications

Line outputs

Load	47 kΩ
Output level	2 Vrms, +1 / −0.5 dB
THD	≤ 0.01 %
Frequency response	20 Hz – 20 kHz, ±1 dB
Signal to noise	Better than 93 dB
Channel separation	Better than 90 dB

Headphone output

Load	32 Ω
Output level	1.7 Vrms ±1 dB (85 mW per channel)
THD	≤ 0.01 %
Frequency response	20 Hz – 20 kHz, ±1 dB
Signal to noise	Better than 90 dB
Channel separation	Better than 72 dB

Line inputs

Impedance & sensitivity	10–50 kΩ, −14 dBV (200 mV) ±2 dB
Frequency response	20 Hz – 20 kHz, ±2 dB
THD + N	≤ 0.025 %
Signal to noise	Better than 80 dB
Channel separation	Better than 75 dB
Maximum input	Better than +7 dB

Phono inputs

Impedance & sensitivity	47 kΩ / 100 pF, −54 dBV (2 mV) ±2 dB
Frequency response	20 Hz – 20 kHz, ±2 dB
THD + N	≤ 0.1 %
Signal to noise	Better than 78 dB
Channel separation	Better than 75 dB
Maximum input	Better than −32 dBV

Microphone input

Impedance & sensitivity	2.2 kΩ, −54 dBV (2 mV) ±2 dB
Frequency response	20 Hz – 20 kHz, ±2 dB
THD + N	≤ 0.1 %
Signal to noise	Better than 80 dB
Maximum input	Better than −32 dBV

Driver compatibility. The macOS v3.0.0 and Windows v2.9.53 drivers below are the final releases and were built for operating systems of that era — the manual lists Windows 98SE through Windows 7, and Mac OS X 10.3 or higher. They are unsigned by modern standards and are not expected to load on current macOS releases. They are preserved here for anyone running period-appropriate hardware.

eBox-44