Details
The Smaart I-O is a measurement grade 2x2 USB audio interface designed and built specifically for use with Smaart v7 Measurement Software. The I-O features two high-quality, active balanced inputs with 50 dB of computer adjustable gain in precision 1 dB steps. These input gains are monitored directly by Smaart allowing the user to retain accurate SPL calibration while varying measurement signal input levels.
The inputs employ a Neutrik combo jack (XLR / ¼”) to accommodate both mic and line level input signals, each with switchable 48V phantom power on the XLR inputs for measurement mics and a 20 dB pad on the ¼” to accommodate line level signals. The Smaart I-O also features two active balanced XLR outputs capable of providing +8.2 dBu (2 Vrms) max level signal for playback or excitation sources.
Powered by the USB port of your computer (or via the optional 5 VDC jack), the Smaart I-O provides a compact and portable measurement-quality input for your Smaart rig.
A simple control application, included with the product on CD-Rom (or available via download from our website) sets preamp gains and phantom power selection. The control application also provides firmware update capability and can rename the Smaart I-O at the hardware level – an important feature when using multiple devices with Smaart.
Smaart I-O Features:
Input
Two (2) Neutrik XLR - ¼“ combo jack inputs:
- Computer controllable 50 dB analog gain in precision 1 dB steps
- +48VDC Phantom Power, individually switchable
- Max input (at minimum gain): +6 dBu (XLR), +26 dBu (¼ ”)
- Active balanced with 2k ohm impedance (XLR), 65k ohm (¼ ”)
- 94 dB dynamic range
- THD+N <0.004 (XLR, minimum gain, 1 kHz at -3 dBFS, unweighted)
Output
Two (2) Active Balanced XLR Outputs
- 150 Ohm impedance
- Max Output : +8.2 dBu (2.0 V rms) w/ 100k ohm load
Frequency Response: 16 Hz – 20 kHz, +/- .25 dB
Sampling Rate/Bit Depth: 48 kHz, 24-bit only
Clock sync: Sample rate clocks of multiple I-O’s connected to the same computer automatically synchronize to allow for device aggregation in Smaart’s dual-channel measurements.
Software Driver: No driver needed. USB class-compliant audio device providing plug-and-play operation on both Mac OSX and Windows (control application must be installed to control gain and phantom power)
Power: USB bus-powered, optional +5 VDC port can be used in cases of insufficient USB power (adaptor not included)
Dimensions: 1.75” (h) x 7.25” (w) x 4.25” (d) ; 45mm (h), 184mm (w), 108mm (d)
Weight: 1 lb 9 oz, 709 g


