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I have purchased brand new Jamo speakers A 320. Front and surround measure with ohm meter open circuit. Centre speaker Measure impedance 6 ohms. Is this a normal,i have also checked another set of the same speakers in the shop. They are the same

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Most better low frequency speakers (woofers) measure about 6 ohms because the addition of crossover will bring the impedance up to 8 ohms. Even without the crossover, 6 ohms will not harm the amp or speakers

Posted on Aug 15, 2008

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Impedance setting on Yamaha AV Receiver


Hi. You can always use a Receiver with an output impedance that is lower than the speakers input impedance.Problems arise when you try to use a Receiver with a higher output impedance than the Speakers input impedance.

Receiver 6 ohms speakers 8 ohms......YES..
Receiver 8 ohms Speakers 6 ohms.......YES, WITH CAUTION

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I need to know how many ohms this speaker should measure on my digital volt/ohm meter, i'm getting 2.1 and 2.4 ohms.


hi
You speaker is dual coil one. Each coil have an impedance of 4 ohms. When these coils are connected in parallel then the ohms will be 2 ohms and in serial it will be 8 ohms. slight variations will show in digital multimeter when you measure the ohms. use the lovest ohms range in you meter to measure the coil impedance.
ok

Apr 11, 2011 | Volfenhag ZX-4712 Car Subwoofer

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I just purchased a yamaha RX-V767 receiver. I have a polk surround sound speaker system 5.1 that have an impededance of 8 ohms. The receiver has an impedece adjustment knob on it. would it be safe to...


No, you don't want to do that. The Ohm output on the amplifier must match the speakers. Run 8 Ohm speakers on 8 Ohm and run all your speakers on the same impedance (Ohms). Your gonna burn your amplifier up if you run different impedances.

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6 ohn wharfedale speakers on an 8 ohm TEAC amp (both old) - will that work


Yes. Most if not all speakers have impedances which vary with frequency and are rated at a nominal or average impedance. So a manufacturer who rates their speakers at 6 ohms may be more honest or chooses to quote it at a specific frequency. So a nominal 8 ohm speaker may actually measure 4 ohms at 100Hz and 12 ohms at 500Hz but averages somewhere nearer 8 ohms. It is normal for most speaker manufacturers to simplify their ratings so speakers which average at say 6 ohms would be categorised as 8 ohm, and 4.9 ohm averaged speakers as 4 ohms.

As a point of interest - some amplifiers are specified as providing their maximum power at impedances of 6 ohms, and there fore some speaker makers (including those made by same manufacurer as amplifier) will rate their speakers at 6 ohms so they appear more compatible.

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Impedance on my Bose 901 Series VI


there 12.9 ohms. there bose speakers not a wallmart if you want a lower impendance then run them in parralell brigde of a bridgeable amplifer/receiver

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Front speakers stopped working


They are probably blown. Here is instructions for testing a blown speaker.

Get yourself an electric meter, like a multi meter they sell at your local Radio Shack. Set it to read ohms (impedance). Make sure your speaker is off and put one meter lead on each of the two terminals. If your speaker is blown, it will read infinite impedance. If your speaker is good to go, it will read 1.0.

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I bought a Jamo C605 floor stander rated at 6 ohm at 89db sensitivity with frequency range (Hz) from 37-20000 and I'm planning to use a Melody brand H88S tube integrated amp with output impedance at 4 ohm...


If you are using the amp at moderate listening levels I would say that either setting would be fine, but I would probably go with 4 ohms. It's a little high, but it is loaded and fairly close to what it wants.

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1 Answer

Denon AVR-2307 Protection Circuit Activated permenantly


The speakers are 4 ohm speakers, a guy on another chat site sent me a link to the impedance curves http://www.audioholics.com/reviews/s...t-v2-fs/page-4

He agreed to that there was a mismatch as the unit has plenty of fresh air around it, plus all the speaker cables have been tested and installed correctly.

So, off to the store where I got it from tomorrow.


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I have a simple stereo speaker from Radio Shack. Small metal case with two wire input latches. Each box has two speakers in side. Both speakers boxes went out at the same time. I wasn't there when this...


You need to measure across the speakers themselves n ot the crossover (cap). If these are 8 ohm speakers, an ohm meter will read about 6 or so. That is because both impedence and resistance use the same measurement. With an ohm meter you are measuring resistance. The speakers are rated using impedence.

If both speakers are open (measure infinity), I would suspect a problem with the stereo that caused them to go open. With the stereo on and playing something (radio,cd , or whatever) use a DC voltmeter to measure between the speaker terminals (Red/Black). You should read essentially 0 no matter what the volume. If you read any DC more than 3/4 V, the problem is with the amp section of the stereo.

Dan

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How do I test an 8-0hm speaker or horn with a digital multimeter? Help!


What? You can take a friggin multimeter, stick it across the terminals and if it does nott give you any resistance back you fryed the voice coil. If you get 0 ohms it means you fired the voice coil. If you get 4, 8, 16 ohms then your good to go.

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