MCM Electronics

Speaker Measurement Interface / USB Woofer Tester By Tenma (WT2) MCM Part #72-850

4.5 stars 3 ratings and 2 reviews
MSRP: $189.00
You Save: $30.00 (16 %)

Speaker Measurement Interface
Don't be fooled by cheaper knock-offs. The WT2 is the only speaker measurement interface with a better than 1% accuracy for the price. Competing models errors tested at 66%.

The Tenma SMI is essential for deign, refurbishing or DIY speaker building. This compact interface is powered directly from the USB port of most PC’s, including laptops, and provide full T/S parameters of the connected speaker. Simply connect to an unmounted driver, and in a few minutes, this device will provide Fs, Cms, Qts, Vas, BL, Re, Le, Mms and CMS measurements, as well as an impedance curve and more. Measurements can be performed in most any shop or home, no special microphones or testing area is required.

Specifications Top

  • Self powers from any USB port, including laptops
  • Single button Q and Fs testing
  • Single button Vas testing for Delta Mass, Delta Compliance and Sensitivity methods
  • Single button Vented Box analysis finds effective box size and tuning
  • T/S Parameters for mid ranges and tweeters
  • Measures Cms-vs-drive suspension non-linearity
  • Closed, Vented and Infinite Baffle box simulation
  • Measures and Simulates Rem/Xem non linear inductance, Qport, Qbox, Qleak and room boost effects
  • Adjustments for setting atmospheric conditions
  • Air wound inductor and Ellipse calculators
  • A real time continuous phase and impedance meter
  • True current source drive (not an approximation)
  • Continuously adjustable 1Hz ~ 20KHz line output
  • Measure resistors, inductors, capacitors, test leads, cables and more
  • Measures 1Hz ~ 20 kHz with 0.01 Ù and 0.1° phase accuracy
  • Interface dimensions: 2 1/2" (H) x 2 1/2" (W) x 1" (D)

    Kit Includes
  • 72" USB cable
  • 30" test leads
  • Ver 2.01 software on CD
  • Detailed instructions on CD
  • Calibration resistor
  • Requires Win98se, WinMe, Win2K or WinXP and available USB port
    Part Numbers
    MCM Part #:72-850
    Tenma Part #:WT2
    Package Specifications & Dimensions
    Weight:0.91 lbs.
    Warranty:365 days
    Need to Return?
    Length:8.5 in.
    Width:9 in.
    Height:3 in.
    Shipping Information
    Extra Shipping Charge:No
    Drop Ship:No
  • Product Reviews Top

    • by Ge_off_me

      on 12/8/2015

      Awesome Unit for Testing Drivers!

      Overall: 5 out of 5
      Top 10 Contributor

      I've been using this unit for a few months now for testing drivers at my workplace. It is simple and easy to use. The most important feature though, is it's accuracy.

    • by GothicAmerican

      on 12/17/2007

      Coulda, Woulda, Shoulda

      Overall: 3 out of 5

      A good friend recommended this device to me for my audio test bench. I tried his WT2 out, it seemed to function fairly well, though the interface seemed sluggish. I had intended to purchase and use the Woofer Tester II in an application for the military... UNTIL I found out that the device had not been FCC approved!!! Also the housing for the electronics looked more like an assembled kit/project than something you would think came from an assembly line...maybe it didn't? Maybe they should just offer this in a kit? Seems a bit like a hobby device rather than a serious piece of test equipment.