Menu
Forum
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Car Audio Discussion
General Car Audio
Car Audio Build Logs
Car Audio Equipment
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Help
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Car Audio Classifieds
Car Audio Wanted
Classifieds Member Feedback
Gallery
New media
New comments
Search media
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Join
Test
Forum
Search
Search titles only
Search titles only
Log in / Join
Search
Search titles only
Search titles only
What's new
New posts
Live Activity
Search forums
Members
Registered members
Classifieds Member Feedback
Menu
Reply to thread
Forum
Car Audio Equipment
Subwoofers
new Fi popping
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="creyc" data-source="post: 2435995" data-attributes="member: 570559"><p>Speakers are rated by impedance, since they have a moving coil. But to get a rough idea of the rating of a speaker without this information from the manufacturer, or the final impedance of multiple drivers if you don't know how to do the simple math, you can just measure the resistance that the amp sees with a multimeter. It's not impedance however, it gives you the resistance, abbreviated "Re" in the thiel small properties. Generally resistance will be a bit less than the impedance of the speaker, which is why 1ohm is mistakenly being called 0.7 in this thread.</p><p></p><p>Resistance is a completely useful value, but because coils have an opposition to alternating current, and this opposition varies greatly throughout the frequency response, the impedance of a speaker is a complex number.</p></blockquote><p></p>
[QUOTE="creyc, post: 2435995, member: 570559"] Speakers are rated by impedance, since they have a moving coil. But to get a rough idea of the rating of a speaker without this information from the manufacturer, or the final impedance of multiple drivers if you don't know how to do the simple math, you can just measure the resistance that the amp sees with a multimeter. It's not impedance however, it gives you the resistance, abbreviated "Re" in the thiel small properties. Generally resistance will be a bit less than the impedance of the speaker, which is why 1ohm is mistakenly being called 0.7 in this thread. Resistance is a completely useful value, but because coils have an opposition to alternating current, and this opposition varies greatly throughout the frequency response, the impedance of a speaker is a complex number. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Equipment
Subwoofers
new Fi popping
Top
Menu
Home
Refresh