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
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
what ohm should I use for amp/sub?
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="llebcire" data-source="post: 8727656" data-attributes="member: 671377"><p>Good question - depends on what you're looking for.</p><p></p><p>Doubling the power, from 350 to 700watts (you're close at 650w) should yield a 3 dB gain in output so there would be a noticeable difference in volume - keep in mind that to double the output volume you would need 10 times the power (3,500 watts). The additional output from going to 650 watts comes as the expense of additional current draw on your system, heat generated by the amp, and typically amplifiers have more control at greater impedance so if SQ is a concern you may prefer the way the amp sounds at 4 ohms.</p><p></p><p>Based on the rated power handling of your sub and the ability of your amp to drive a 1 ohm load, you'll be fine as long as the amp is in a proper environment (cooling, electrical system capacity) so you could listen both ways. While possible it is far less frequent to damage a speaker with too much power (especially when you're so close to rated) so unless you're heavily overdriving your amp, or feeding your sub 5k, you'll be fine.</p><p></p><p>Speaker enclosure does play a part, with a sealed box being more forgiving, but a ported box is fine as long as you don't allow the sub to play below the tuning frequency at high power as the box loses the ability to dampen the speaker below the tuning frequency.</p><p></p><p>Does this help or create more questions?</p><p>-Eric</p></blockquote><p></p>
[QUOTE="llebcire, post: 8727656, member: 671377"] Good question - depends on what you're looking for. Doubling the power, from 350 to 700watts (you're close at 650w) should yield a 3 dB gain in output so there would be a noticeable difference in volume - keep in mind that to double the output volume you would need 10 times the power (3,500 watts). The additional output from going to 650 watts comes as the expense of additional current draw on your system, heat generated by the amp, and typically amplifiers have more control at greater impedance so if SQ is a concern you may prefer the way the amp sounds at 4 ohms. Based on the rated power handling of your sub and the ability of your amp to drive a 1 ohm load, you'll be fine as long as the amp is in a proper environment (cooling, electrical system capacity) so you could listen both ways. While possible it is far less frequent to damage a speaker with too much power (especially when you're so close to rated) so unless you're heavily overdriving your amp, or feeding your sub 5k, you'll be fine. Speaker enclosure does play a part, with a sealed box being more forgiving, but a ported box is fine as long as you don't allow the sub to play below the tuning frequency at high power as the box loses the ability to dampen the speaker below the tuning frequency. Does this help or create more questions? -Eric [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Discussion
General Car Audio
what ohm should I use for amp/sub?
Top
Menu
Home
Refresh