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 Help
Wiring, Electrical & Installation
Addition to speaker system help
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="HardofWhoring" data-source="post: 8857124" data-attributes="member: 674149"><p>That amp is going to do 300w x 3 @ 4ohm. So you're either going to want to do 1 amp with 3 of em, or 2 amps, and do 6 speakers. </p><p></p><p>Even if you do two of those 900w amps, + 200, 2100w is fine on one battery. More batteries will give you more of a storage bank, which you might need depending on the motor, and possibly alternator. </p><p></p><p>So if you keep the engine running and the alternator's charging: </p><p>roughly it's 2100w / amp efficiency, lets say 80%. 2100/.8 = 2625w</p><p>2625w / (are you at?) 14.4v = 182 amps draw. </p><p>So when your speakers are playing at max volume, as loud as you can, (and you set it to RMS), you are drawing 182 amps, (+ whatever is on, on the boat). </p><p></p><p>I don't know your boat, and not looking it up, but do you normally keep it running while you are boating? </p><p>Now you could get your alternator rebuilt for a larger charge rate, if you can't find an off the shelf upgrade, but you also need to know what the alt's amp output rate is at/near idle, and what RPM is needed for max output. A great alt will do most at idle. A crappy one can do 3 times as much on the top, and do less at idle than what you have. Are you usually cruising, or sitting there at idle? </p><p></p><p>You've got a lot of speakers here, and not sure on your amp setup. You have (4) 50w speakers and a sub being powered by a 100w x 6 amp? </p><p></p><p>I think what I would do is, stop buying HTX-6 amps. You have one that's all you need. Instead of 4 of those rev 10s, go with 3 of em. With 300w on that amp, you're playing em at mono, so they are just to be loud. Four doesn't make sense. If the placement on the boat needs 4 then get six with two amps. I think that's overkill, and for the extra 80 amp draw, I think it's a slight compromise to ease up on the electrical draw. </p><p></p><p>Get a 4ch amp that's about 50w - 80w x 4. Some head units can do 50w, and not sure what yours is, but maybe that was already a plan. </p><p></p><p>Then get a 3rd amp for your sub. Not sure on the wattage, at or a little over what your sub is. </p><p></p><p>If space and money aren't a thing, I definitely would a 2nd battery though just for the extra storage. That extra 80 amp draw for those 4-6 speakers, with two of those batteries, and no alt recharge is the difference between, 1 1/2 hours of full music battery storage time, vs 2 3/4 hours.</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8857124, member: 674149"] That amp is going to do 300w x 3 @ 4ohm. So you're either going to want to do 1 amp with 3 of em, or 2 amps, and do 6 speakers. Even if you do two of those 900w amps, + 200, 2100w is fine on one battery. More batteries will give you more of a storage bank, which you might need depending on the motor, and possibly alternator. So if you keep the engine running and the alternator's charging: roughly it's 2100w / amp efficiency, lets say 80%. 2100/.8 = 2625w 2625w / (are you at?) 14.4v = 182 amps draw. So when your speakers are playing at max volume, as loud as you can, (and you set it to RMS), you are drawing 182 amps, (+ whatever is on, on the boat). I don't know your boat, and not looking it up, but do you normally keep it running while you are boating? Now you could get your alternator rebuilt for a larger charge rate, if you can't find an off the shelf upgrade, but you also need to know what the alt's amp output rate is at/near idle, and what RPM is needed for max output. A great alt will do most at idle. A crappy one can do 3 times as much on the top, and do less at idle than what you have. Are you usually cruising, or sitting there at idle? You've got a lot of speakers here, and not sure on your amp setup. You have (4) 50w speakers and a sub being powered by a 100w x 6 amp? I think what I would do is, stop buying HTX-6 amps. You have one that's all you need. Instead of 4 of those rev 10s, go with 3 of em. With 300w on that amp, you're playing em at mono, so they are just to be loud. Four doesn't make sense. If the placement on the boat needs 4 then get six with two amps. I think that's overkill, and for the extra 80 amp draw, I think it's a slight compromise to ease up on the electrical draw. Get a 4ch amp that's about 50w - 80w x 4. Some head units can do 50w, and not sure what yours is, but maybe that was already a plan. Then get a 3rd amp for your sub. Not sure on the wattage, at or a little over what your sub is. If space and money aren't a thing, I definitely would a 2nd battery though just for the extra storage. That extra 80 amp draw for those 4-6 speakers, with two of those batteries, and no alt recharge is the difference between, 1 1/2 hours of full music battery storage time, vs 2 3/4 hours. [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Wiring, Electrical & Installation
Addition to speaker system help
Top
Menu
Home
Refresh