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ALLOSUN - EM480B Audio Impedance Tester Digital LCD Insulation Resistance Megohmmeter Meter Tester with Bag

4.7 (12) Write Review
Free shipping on orders over $29.99

$89.99

$ 37 .99 $37.99

In Stock

About this item

  • Power supplied by 6 pieces 1.5V battery, AA or equivalent.(Battery not provided by seller)
  • The product is with carrying case and belt, which is easy to carry and use.
  • It owns data hold function, auto power off. Protection circuit provided, be able to avoid damage caused by the discharge voltage of the tested load.
  • Test voltage among 250V, 500V and 1000V.
  • Test voltage can be changed by the rotary switch. LED used as normally working indicator under high voltage condition. High ability to withstand high load.


Product Description

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:

  1. Display LCD
  2. "Test" button
  3. "Lock" key
  4. "Hold" key
  5. Backlight key
  6. Function/tange switch
  7. LED indicator
  8. Current terminal 
  9. Voltage terminal 
  10. Grounding voltage test
  11. 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

belt

Uncle John
2025-08-19 17:29:09
Was able to quickly diagnose a 70V outdoor distributed sound system.
Sam Young
2025-08-14 18:38:52
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
Dean Sutton
2025-08-03 15:57:32
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.
steve rice
2025-07-25 18:11:02
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
tammy
2025-07-23 10:33:50
This will be used for troubleshooting paging/speaker systems and bright sign equipment!
Melis Solakovic
2025-06-18 11:53:37
Not a new device, scratched and used... this is simply not OK.
Joshua Kelly
2025-06-15 14:21:41
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.
HI Services
2025-06-05 21:15:52
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
Nathon Hall
2025-05-02 18:25:49
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.
MARCO ARTURO MUNGUIA ALVARADO
2025-01-18 12:35:12
Llegó mucho antes de lo que marcaba la aplicación y en excelente estado y funciona como dice las especificaciones
Jeffrey Goodsell
2025-01-12 15:53:35
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.
ignacio sanchez r
2024-12-06 18:00:07
me gustaria que tuviera mas rango de impedancia minimo 20000 ohms se me queda corto en algunas situaciones