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 Discussion
General Car Audio
Electricity is very important to car audo. Why is it not discussed more often?
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="seedlings" data-source="post: 8413919" data-attributes="member: 666435"><p>For speakers, resistance in ohms, impedance, change based on the frequency. A speaker will have least resistance at it's resonant frequency (Fs), and increasingly higher resistance as frequency gets further from Fs.</p><p></p><p>Speakers (a coil of wire) and all loads/circuits with capacitance/inductance will have a different resistance based on the frequency. A resistor (theoretically) has no capacitance and no inductance, and therefore has the same resistance at every frequency.</p><p></p><p>AC voltage is measured at a frequency(ies). EG: USA's power grid is 120V at 60Hz. If you had a speaker that had 6 ohms resistance at 60Hz, and connected it to the power outlet, you would hear 120*120/6, or 2400 watts of 60Hz. (since power=voltage*voltage/resistance at that frequency).</p><p></p><p>DC voltage is 0 (zero) Hz. It has no AC component. This is why when you connect a 9V battery to your speaker to check polarity, it goes out and doesn't come back until you remove the voltage. It's called Direct Current because all the current goes directly across the load resistance one direction. With Alternating Current, the current goes one way, then changes to the other way at a given frequency.</p><p></p><p>CHAD</p></blockquote><p></p>
[QUOTE="seedlings, post: 8413919, member: 666435"] For speakers, resistance in ohms, impedance, change based on the frequency. A speaker will have least resistance at it's resonant frequency (Fs), and increasingly higher resistance as frequency gets further from Fs. Speakers (a coil of wire) and all loads/circuits with capacitance/inductance will have a different resistance based on the frequency. A resistor (theoretically) has no capacitance and no inductance, and therefore has the same resistance at every frequency. AC voltage is measured at a frequency(ies). EG: USA's power grid is 120V at 60Hz. If you had a speaker that had 6 ohms resistance at 60Hz, and connected it to the power outlet, you would hear 120*120/6, or 2400 watts of 60Hz. (since power=voltage*voltage/resistance at that frequency). DC voltage is 0 (zero) Hz. It has no AC component. This is why when you connect a 9V battery to your speaker to check polarity, it goes out and doesn't come back until you remove the voltage. It's called Direct Current because all the current goes directly across the load resistance one direction. With Alternating Current, the current goes one way, then changes to the other way at a given frequency. CHAD [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Discussion
General Car Audio
Electricity is very important to car audo. Why is it not discussed more often?
Top
Menu
Home
Refresh