Rational Acoustics Smaart I-O

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Quick Overview

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.

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.


Rational Acoustics will not sell the I-O directly into countries where we have existing distributors.  Please click HERE to view our list of distributors.


Smaart I-O

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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

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