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<blockquote data-quote="Databyter" data-source="post: 6794939" data-attributes="member: 621750">I&#039;m going to be running an A/B 4 channel Amp (80 RMS) per @ 4 Ohms, also a D Class @ (300 RMS mono @ 4 Ohms). I&#039;m thinking that I&#039;ll have alot of headroom with this setup and will not be running it near max power. ( Oh yea, and the 4 channel running 4 6 1/2&quot; Alpine SPS 600&#039;s (80 watt RMS to 250 Peak), and a JL Woofer 300 Watt 10&quot;).I&#039;d like to run the system somewhat when the vehicle isn&#039;t running so I&#039;m thinking maybe I&#039;ll need a deep cycle battery isolated from my Start batt?Also would I need a Capacitor for this setup? How big?I&#039;m not going to be bumping Rap at high volume, but maybe rock, Reggae and Jazz at medium high volume. I want to be able to crank it up now and then when appropriate (time and place), but most of the time I just want it at a moderate volume but with a rich full range sound. I&#039;m going to attempt to lower road noise and vibration so I don&#039;t have to compete with it..Also If I get a deep cycle is it safe to have it in my passenger compartment, I don&#039;t have much room under the hood but alot more in my Subaru wagons passenger compartment or cargo area..Someone mentioned an alternator as well, but I&#039;m not looking to shake the street or anything, is that really necesary for a moderate SQ system, even with a deep cycle addon. It will only charge what I use, so I&#039;m thinking I&#039;m not going to be stressing it more for an extra batt.Thoughts?</blockquote>

[QUOTE="Databyter, post: 6794939, member: 621750"] I'm going to be running an A/B 4 channel Amp (80 RMS) per @ 4 Ohms, also a D Class @ (300 RMS mono @ 4 Ohms). I'm thinking that I'll have alot of headroom with this setup and will not be running it near max power. ( Oh yea, and the 4 channel running 4 6 1/2" Alpine SPS 600's (80 watt RMS to 250 Peak), and a JL Woofer 300 Watt 10"). I'd like to run the system somewhat when the vehicle isn't running so I'm thinking maybe I'll need a deep cycle battery isolated from my Start batt? Also would I need a Capacitor for this setup? How big? I'm not going to be bumping Rap at high volume, but maybe rock, Reggae and Jazz at medium high volume. I want to be able to crank it up now and then when appropriate (time and place), but most of the time I just want it at a moderate volume but with a rich full range sound. I'm going to attempt to lower road noise and vibration so I don't have to compete with it.. Also If I get a deep cycle is it safe to have it in my passenger compartment, I don't have much room under the hood but alot more in my Subaru wagons passenger compartment or cargo area.. Someone mentioned an alternator as well, but I'm not looking to shake the street or anything, is that really necesary for a moderate SQ system, even with a deep cycle addon. It will only charge what I use, so I'm thinking I'm not going to be stressing it more for an extra batt. Thoughts? [/QUOTE]

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