I have 2 15L7's in a ported box with a little more than 5 cubes per sub. The subs have dual 2 ohm coils. I was planning in running 2 JBL 1200.1's to each sub, so they would be seeing around 2400w RMS. The subs are only rated for 2000w max, but I would only do this for burps so the thermal power handing is not really an issue. I also figured since the subs will be playing at the res freq the excursion would be limited enough to stop them from falling apart. I wouldn't just hook it all up and slam the 2400w to it, I would slowly increase the level to minimize the risk of damaging the subs. Should I even try this much power, or just save my time and money instead of risking the life of the subs?
Yea that much would probably work well for the subs it was also give you a little head room. Now I have heard things about kickers not be able to take the power, but I have no idea if its tru or not. Assuming its not true I would say you looking a setting up a nice combo. The main thing is at a comp. if you try to send too much power to them you can melt the coil, thats the only thing I would worry about but if you use it responsibily I would think you shouldnt have any problmes out of it. Just be sure to use a subsonic filter.
If you're just going to feed them the 2400w (which is a true 2800w probably) for burps, i think you'll be fine. Just use one of the amps to run the subs for daily driving though. You'll still get roughly 6-700w per sub.
Yes, for daily driving I only run one amp per sub, but I run them at one ohm so they are seeing 1200w-1300w each. I don't think I could take all ~5kw every day. Thanks for the input, I'll let you know what happens when I get home in 2 months and get it all hooked up.
No they wouldnt take the 4800 watts all day, BUT just for daily driving I doubt youd send that much to them any way you could just leave them hooked up and turn the gains down and it would just give you a lot of head room which would be fine. How are you planning to unhook one amp per sub for daily driving? I mean you could turn of one amp but that voice coild would get now power....so that means you would have to take the subs out each time and re wire them or rewire them at the amps, and after a while that will get to be a pain in the ass. I just say use both amps even for daily drving and youll just have a lot of head room ... so having them both hooked up opposed to only haveing one hooked will proabably sound better any way.
...Or you could locate some high-power relays (not Bosch-style alarm relays).. I did an install a while ago using two relays.. eight subs, and the final series/parallel wiring was deterimined by the position of the switch at the dashboard... With the switch in one direction, the final connection would be made in series, the amp would be running at 4 ohms, less power. With the switch in the other direction, the final connection would be made in parallel, the amp would be running at 1 ohm, more power. Heck, you could do something similar just with high-power switches at the amps, if you wanted, if you didn't mind having to manually switch the system over from your trunk..
...Or you could locate some high-power relays (not Bosch-style alarm relays).. I did an install a while ago using two relays.. eight subs, and the final series/parallel wiring was deterimined by the position of the switch at the dashboard... With the switch in one direction, the final connection would be made in series, the amp would be running at 4 ohms, less power. With the switch in the other direction, the final connection would be made in parallel, the amp would be running at 1 ohm, more power. Heck, you could do something similar just with high-power switches at the amps, if you wanted, if you didn't mind having to manually switch the system over from your trunk..[/b][/quote] Would those affect the sound in any way? But do you think it is necessary for him to really do it in thise case? Would the two 1200.1 still be ok and work fine for daily drving?
I might leave all 4 amps on all the time, and I guess I wouldn't have to scope the gains every time if I marked the positions for each setting. Actually as long as they're close it should be OK, since they each drive a seperate coil. I hadn't thought of the increased headroom, but that would be an advantage of keeping all the amps hooked up all the time. I don't want to get into the relays and all that. It would work fine, but its not like I need to change it over every five minutes, only every now and then. I had considered making a jumper block out of ABS and stainless, where I could bolt small bussbars in different configurations to get the power and resistance combo I want. I think I will just go with all amps all the time, because why have them if I'm not going to use them. Thanks for the ideas.
Man, i misread your post the first time. I didn't realize you had 4 amps total. If you run two amps to each sub for daily driving you'll more than double the RMS of each sub... I'm not sure if you have a warranty on those subs or not, but i'll bet Kicker won't honor it if you do that . I understand headroom is a good thing, and i like to have some myself, but 1500-1700w of headroom is pushing it IMO. Others will probably disagree.... but that's my .02.
Yeah, i'd say thats plenty overkill there. I mean, everybody likes to have a little headroom of course, but damn, 2400 watts per sub as a daily driver? umm, thats way pushing it.
I have 2 02 L715s 4.5 +port each ,tuned to 33hz with a 81000d on each coil. I have mega hours of abuse on them and I can't hurt them, So I would say 2400 is a little conservative. This is in my daily driver work van that plays music well into the 50s
i had my l715 with 4000+watts (two autotek mx5000's @ 1ohm) for both burps and dialy driving... and the sub is fine. Just watch them... kickers smell when they are being overpowered and that means its time to turn it down and give them a break. If you have a huge port what the low frequency's... that will kill your sub faster than anything... just be aware if the sub starts poping or bottoming out (use a subsonic filter if this is happening). Just be smart about it and you should not have a problem... being smart DOESNT mean lets play it for 20 min strait at full blast with 40000 watts.
Well I have a KL7 with 100kW running for 48hrs stright but as a general rule, if you want your subs to last for maximum life (I am talking 10+ years not 1 year) you should not over power a sub more than 25%-50% + rms..... I UNDER POWER my subs and they are plently loud for a daily driver, Sound is all in the box
