MCM Electronics

Audio Impedance MeterMCM Part #: 72-6948  |  Tenma Part #: 72-6948

Audio Impedance Meter 4.5 stars from 2 reviews.
Login to rate or review this product

Active device is essential for reliable installation of background music and paging systems in residences, offices buildings and public areas. Avoid costly service calls and amplifier damage by verifying actual speaker system impedance prior to operation. Unlike conventional volt/ohm meters, which measure DC resistance, this unit utilizes an internal 1KHz oscillator to measure true impedance.

Product Description

  • Accurately measure speaker lines that utilize impedance matching volume controls, switchers, transformers and passive crossovers
  • Because this unit accurately measures up to 20Kohm, it may also be utilized with 25V, 50V, 70V, and 100V speaker line transformers in commercial installations (information included in the manual)
  • Large digital display features 1" characters for easy viewing
  • Rotary selector provides 200Ω, 2KΩ and 20KΩ scales
  • Rugged, double insulated case is CATIII rated for use up to 200V
  • Dimensions: 3" (H) x 7"(W) 3-1/4"(D)
  • Includes: Test leads, carry case and owners manual
  • Requires six “AA” batteries, not included

Product Reviews

  • "Field service Background music systems" by arcsat on 1/16/2014
    Overall: 5 out of 5

    Received defect meter and MCM sent out a replacement for me after I contacted them. They billed me for the replacement and then credited me when they received the defective one. They did a UPS pickup for me and paid the shipping back. Great service! The meter works perfect. You can check impedance of speaker before you put into system. Check total system loads for calculating the max power amp you need to drive load. The case it very durable, shock and water proof! Not like the TOA Meter. I like the analog meters but the trade off is a much more reliable package. The meter leads are solid quality with removable alligator clips. Very nice option for taking readings. Plus a hold button so you can touch, remove leads and read meter when you get down from the ladder. All good stuff and I recommend this meter. Another valuable tool in my quiver.

  • "I have purchased 4 of these meters for audio servicing and they work well for the money" by Bob Durk on 12/10/2012
    Overall: 4 out of 5

    Easy to use and appears quite accurate. I have used a TOA ZM104 (analog ) meter that has a higher output 1Khz tone than this unit ; so you have to pay more attention in a moderately noisy environment with this meter. The unit casing is a moisture retardant plastic that is well made . The alligator clips are handy to used and store in the well made zipper case. This is a very handy tool that I recommend to any audio installation or service technician.

  • Rate It!

    Login Here to rate and review this product.

Others Also Bought

Image of Double Sided Foam Tape

28-955 - Double Sided Foam Tape

•Thousands of uses •Fasten accessories to car dash, etc. •3/4" x 61/2' roll

In Stock


Buy Now
Image of 10MM Headphones White High Performance Earbud

35-5155 - 10MM Headphones White High Performance Earbud

High Performance Earbud Headphones White Lightweight, stylish, high performance earbuds give crystal clear sound as well as a comfortable fit. Ideal for use with CD, MP3, MP4 and any other small portable audio players.

In Stock


Buy Now
Image of VHS Head Cleaner

80-6875 - VHS Head Cleaner

VCR Head Cleaner safely and effectively cleans tape heads and entire tape path Non-abrasive Exclusive cleaning material prevents debris from re-depositing on heads Wet type

In Stock


Buy Now
Package Specifications & Dimensions
Weight:2.17 lbs.
RoHS Comp:No
Warranty:365 days
Need to Return?
Length:8.5 in.
Width:6.25 in.
Height:4.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages

MCM Cat 57, Page 1286

MCM Cat 56, Page 1126

PDF Reference

Requires Adobe Acrobat Reader.

Mfr. Info

Tenma Logo
Mfr. Name:Tenma
Mfr. Part Number:72-6948
Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.
Save at least 15% on all Tenma Test Equipment through Sunday. Use promo code EMC396.