The readings I getting don’t make sense I am testin a Bogen SPT 15A I get a reading of 8 ohms at 10x divided by 4900 is 64 what am I doing wrong

That horn has a selector to choose wattages via 25v/70v, or if you have the spt-158a is 8 ohms. So do you have a 70voly system or 8 ohms

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TOA ZM-104A Impedance Meter, Measures Impedance of Speaker Lines Up to 100k Ohms, Zero Adjustment for Accuracy On All Ranges, Easy to Read Meter Calibrates Directly in Ohms

Product ID: 260569171

Details

Brand
Toa
Power source
Battery
Style
Modern
Colour
Black
Item weight
700 Grams

📊Direct ohm calibration

📏Measures up to 100kΩ

⚙️Zero adjustment for precision

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Description

🎯 Nail your audio setup with pinpoint impedance accuracy!

INSTANT CLARITY - Easy-to-read meter calibrated directly in ohms eliminates guesswork and speeds up your workflow.
WIDE RANGE MASTERY - Handles impedance measurements up to a massive 100,000 ohms, covering all your professional audio needs.
PRECISION MEETS POWER - Zero adjustment ensures accuracy across all impedance ranges, so your speaker lines are measured flawlessly every time.
PRO GRADE PORTABILITY - Comes with a sleek carrying case and test leads, making it the perfect on-the-go tool for managers who demand reliability.
SMART REFERENCE INCLUDED - Integrated impedance-to-power conversion chart means you’re always equipped to interpret results like a pro.

The TOA ZM-104A Impedance Meter is a professional-grade tool designed to measure speaker line impedance up to 100k ohms with ±10% accuracy. Featuring zero adjustment for precise calibration, a direct-reading ohm meter, and a handy impedance-to-power conversion chart, it’s built for audio pros and managers who demand reliable, fast, and portable testing solutions.

Specifications

ASIN	B004KO1AS8
Best Sellers Rank	#74,889 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #170 in Voltage Testers
Brand	TOA
Brand Name	TOA
Color	Black
Colour	Black
Item Dimensions	25.4 x 15.2 x 7.6 centimeters
Item Weight	700 Grams
Item dimensions L x W x H	25.4 x 15.2 x 7.6 centimeters
Item weight	700 Grams
Lower Temperature Rating	23 Degrees Celsius
Manufacturer	TOA Electronics
Measurement Type	Ohmmeter
Minimum Operating Voltage	6 Volts
Model	ZM-104A
Number of Items	1
Number of Packs	1
Part Number	ZM-104A
Power Source	Battery Powered
Power source	Battery Powered
Specification Met	Cat I
Style	Modern
Style Name	Modern
Unit Count	1.0 Count
Upper Temperature Rating	104 Degrees Fahrenheit

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468381CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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