What Is the Correct Ohm Reading for Sf-p101n Laser

• Home
• Forums
• The Gear
• Amps and Cabs

You are using an out of date browser. It may non display this or other websites correctly.
You lot should upgrade or use an culling browser.

Ohm reading question

• Thread starter 6Tones
• Outset date Feb 3, 2021

• #one

I accept 2x10 cab with two 8ohm speakers.
The speaker jack plate has 3 outputs.
RIght /Left / Mono

I wanted to make sure wired and are using the correct ohm jack input so I tested with a mulit meter.

I got 5ohm or so rating on the 4ohm jack
viii.5 for the 8ohm
but on the 16ohm jack its reading 24-26ohm ??

• #ii

You said Right/Left/Mono at the peak, and and so 4/viii/16 at the bottom. Which is it?

R/L/1000 should be either 8/eight/4 (parallel) or 8/eight/16 (series) measuring slightly less

If you lot are reading nearly 25 ohms, it sounds like y'all take two sixteen ohm speakers wired in serial.

• #iii

Its a eminence cab which has 3 inputs ,this is what they emailed me

"Left jack just--chiffonier is 4 ohms, both speakers used.

Left and right jacks to split up amps (or stereo amp)--

both speakers work in stereo, eight ohms each side.

Right jack only--cabinet is 8 ohms, right speaker used (left speaker

off).

Mono (bottom) jack only--chiffonier is 16 ohms, both speakers used "

I have two 8ohms speakers wired in a series(to my knowledge)
Im getting a loftier reading on the bottom mono jack ...check over again its 21ohms reading on the 16ohm ohm out put

Mayhap my digital meter isnt that authentic ?

• #4

Your meter is reading DC resistance which will be a picayune less than nominal impedence,

So an 8 ohm speaker will read ~ 5 to half dozen ish ohms. It doesn't seem like information technology'south wired correctly.

• #7

I'd pop the back and confirm they're both 8 ohm speakers then go from at that place.

• #8

I'd pop the back and confirm they're both 8 ohm speakers then go from there.

Definitely 8ohm speakers. Its weird crusade I tested 3 other cabs and they all read fine.
Its the mono (16ohm) jack thats reading funny. sometimes it reads 20ohm sometimes 24ohm ..

• #ix

Definitely 8ohm speakers.

You tested the speakers individually?

• #10

Im getting a 4.5 reading from each speaker wired up

• #eleven

Definitely some foreign readings, I'one thousand not sure what to make of it.

• #12

Since it's new, have you lot called eminence to discuss? Aside from that I think I'd exist inclined to disconnect the wiring from the speaker lugs and test each speaker out of any circuitry. This would tell yous if the speakers are labeled correctly and/or if there is any harm internally. If you're able to confirm the speakers are ok, then y'all tin turn to the wiring & jack portion. Basic troubleshooting: divide the circuit and come across on which side the trouble lies.

interested to see the outcome here.

• #13

This is the most odd thing ,and so I disconnected the speaker wiring,tested each both read correct 8ohms....
Hooked them support ,retested the 16ohm mono jack and now reading correctly at xvi.5 ohm
( my meter tends to read 1ohm high)
I have no idea why after multiple tests it was reading high 20-24ohms..
Thanks for the reply'southward and input all.

• #14

This is the most odd thing ,so I disconnected the speaker wiring,tested each both read correct 8ohms....
Hooked them back upward ,retested the 16ohm mono jack and now reading correctly at 16.5 ohm
( my meter tends to read 1ohm loftier)
I accept no thought why after multiple tests it was reading high 20-24ohms..
Thanks for the answer's and input all.

Take it apart and tighten and make clean the shorting contacts.
This has been a alert.

• #15

I got 5ohm or so rating on the 4ohm jack
eight.five for the 8ohm
but on the 16ohm jack its reading 24-26ohm ??

"Left jack only--cabinet is 4 ohms, both speakers used.

Left and right jacks to separate amps (or stereo amp)--

both speakers piece of work in stereo, 8 ohms each side.

Correct jack simply--cabinet is 8 ohms, right speaker used (left speaker

off).

Mono (lesser) jack only--cabinet is 16 ohms, both speakers used "

Im getting a 4.five reading from each speaker wired up

For DCR of iv.5Ω each speaker, you should read:

Left Jack/Right Jack: 4.5Ω NOTE: You'll have to insert a plug into each jack to open the contacts.​

Again, proper readings rely on having an bodily 1/4" plug inserted in the relevant jack to manipulate the switched contacts present.

If you get college than 9Ω anywhere, your meter leads probably aren't making adept contact with the metal (due to oxidation, flux, poor force per unit area, etc).

... ( my meter tends to read 1ohm high) ...

Good meters often evidence 0.2 or 0.3Ω resistance with the leads shorted together because of resistance of the lead wires. Only proficient meters too have a mode to nix-out that residual reading.

Information technology could exist your probes aren't skillful, have high DCR themselves, aren't making good contact, or your meter just isn't good at resolving very low resistance. Could be any combination, or all of those things.

• #16

Besides sleepy now for a full text and Math just so far 2 possibilities which will explain those readings:

one) muddied/corroded multimeter cables/probes/assistant jacks/selector switch, all of which combined add ane or more than ohms to all readings.

two) very muddied/corroded leaf contacts on switching jacks.
IF push button-in connectors are used, they may also show same symptoms.

3) 4.five ohm when measuring either speaker means they are in parallel all the time (somebody suggested inserting a ´plug to break that connection which is the style to go)

Will continue after a much needed nap

• Home
• Forums
• The Gear
• Amps and Cabs

woodmysecutage.blogspot.com

Source: https://www.thegearpage.net/board/index.php?threads/ohm-reading-question.2224993/

Share this post