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All- Sun EM480B Audio Impedance Tester
EM408B is a precise measurement instrument that specially applied in measuring audio impedance.
Applied in many wide application, such as measuring the impedance of loud speaker, a set of sounds
system, home theater and commercial audio sytem.
Features:
- True measurement of speaker systems actual impedance at 1kHz
- Three test ranges (20Ω / 200Ω / 2000Ω) allow testing of home theater and commercial sound systems.
- Convenient protable battery operation.
- Low battery indication
- Data hold function
- Timer function for easier operation. The timer can last about 30 seconds minutes after users press TEST button.
- Auto power off: after about 15 minutes of nonz- use
For insulation resistance test,you can change the test voltage among 250V,500V and 1000V.
it can also be used to test ACV,resistance which is less than 200Ω, and test for continuity.
You can use it to test transformer,motor,cable,switch,electrical appliance as well as to do insulation resistance test.
Front Panel:
- Display LCD
- "Test" button
- "Lock" key
- "Hold" key
- Backlight key
- Function/tange switch
- LED indicator
- Current terminal
- Voltage terminal
- Grounding voltage test
- Input terminal for grounding voltage test
Specification
- Display: LCD 3 1/2 digits (2000 counts), with unit
- Data Hold Indication: H symbol appears on the display
- Power supply: 9V DC (6 x 1.5V AA battery) (Not provided by seller)
Accuracy is specified for a period of one year after calibration and at 18℃ to 28℃, with relative humidity <75%.
Accuracy specifications take the form of : ±([% of Reading] + [number of Least Significant Digits])
- Range: 20Ω / 200Ω / 2000Ω
- Resolution: 10mΩ / 100mΩ / 1Ω
- Accuracy: ± (2%+2) (or ± 0.1Ω)
- Test Frequency: 1kHz
- Size: 168x110xx62mm
- Weight : 592g
Accessories and Packaging
Nathon Hall
Reviewed in Canada on April 2, 2024
This is an effective meter for the price. If you're an audio professional involved in high-impedance speaker installations, this will measure the total impedance of the speaker network at 1Khz. My only criticism is that it should do other test frequencies as well, e.g. 150Hz and 15Khz.Plan to use throw-away alkaline batteries to power this meter. Typical NiMH batteries are just a little bit too large to fit its battery compartment.
Uncle John
Reviewed in the United States on October 10, 2023
Was able to quickly diagnose a 70V outdoor distributed sound system.
tammy
Reviewed in the United States on September 14, 2022
This will be used for troubleshooting paging/speaker systems and bright sign equipment!
Melis Solakovic
Reviewed in the United States on June 15, 2022
Not a new device, scratched and used... this is simply not OK.
Dean Sutton
Reviewed in the United States on March 26, 2022
It may not have quite the same measurement range as more expensive devices but it is great value for money. Very happy with the purchase and it's already paid for itself in terms of resolving problems.
Sam Young
Reviewed in the United States on October 28, 2022
No frills, it works, using for 70v speaker installations mostly, tested with several circuits already and it's accurate enough. No frills no extra features but takes accurate readings
HI Services
Reviewed in the United States on April 16, 2022
Will not work if I fully screw down the battery cover. Three out of four of the screws are fine, but as soon as I tighten the fourth, it shuts down. That tells me the screws are too long or not properly insulated from the internal electronics. If I didn't need it right away for a job, I would immediately return it. As it is, I'll probably send it back as soon as I'm done with it. I am beyond dismayed that in this day and age, manufacturing on a professional product can be so poor
Jeffrey Goodsell
Reviewed in Canada on December 27, 2021
Nous avions besoin d'un 2ieme tester de speaker 70volts Et celui-ci semble parfaitement répondre au besoin. La fiabilité est à valider mais après les premiers essais, tout semble parfait. L'etuit est très pratique avec le couvercle rigide et la courroie de transport.
MARCO ARTURO MUNGUIA ALVARADO
Reviewed in Mexico on August 11, 2020
Llegó mucho antes de lo que marcaba la aplicación y en excelente estado y funciona como dice las especificaciones
ignacio sanchez r
Reviewed in Mexico on October 27, 2020
me gustaria que tuviera mas rango de impedancia minimo 20000 ohms se me queda corto en algunas situaciones
Joshua Kelly
Reviewed in the United States on September 9, 2019
I haven’t had a chance to use this much yet but so far so good! It does everything it says it will and construction is good also. Very nice that it comes with a case and I’m very happy with my purchase.
steve rice
Reviewed in the United States on November 11, 2019
This impedance meter is very simple to use and is great. The case keeps it protected and I am using it to test circuits on a commercial fire alarm system. It gives you the calc to convert to watts in the instructions. Would definitely recommend
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