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<blockquote data-quote="T3mpest" data-source="post: 7229411" data-attributes="member: 560148"><p>One thing to take into consideration with passives that few guides will tell ya. Even though the box can be small since there is no port takaking up air space, you still have to make sure the box is big enough to allow clearance inside for the passives to not hit the main drivers. If you do a 2 sub setup with the max height you can fit in your trunk then you need 4 passives, so some woudl be on the side. Since 2 sub setups are common i though it'd bring this up. If space is an issue and that's why you used them you do still have to be careful with yoru dimensions on the box and watch which way they fire.</p><p></p><p>Anyway I do use PR's in my setup. 2 av15h's in 4.7 cubes tuned to 25hz. It really does allow you get the extra outuput of ported without giving up all your space. Plus you can tune low easily this way. I do feel like it gives up just a bit on some of the lows compared to some smaller sealed setups. Not in actual SPL, but more in frequency response. Just a bit easier to get that strong low end balance I and alot of daily listeners want. White Girl style moving air lows. Super lows the car digs tho SNoopdan "love story mix" moves my rear seat and deck an inch or two on that 20hz opening. This is in a cadillac too, not a litttle toyota. Just saying for those who might try to go a normal size up from what they can fit ported since they saving air room, if you still cant' quite give the drivers normal air room, while it will sill play low, it wont' do it with the response you normally expect from such a low tuning.</p><p></p><p>IDk what' I'd do in my car if i reddid it. 12's with Pr's could play silly loud at tunign and when you tune low that is still pretty musical but fun. My box now has the frequency response of a big sealed box, but just has great overall output since I used 2 15's do it it. A sealed box with 15's wouldn't have the extra oomph around 40hz but still extend that low.</p></blockquote><p></p>
[QUOTE="T3mpest, post: 7229411, member: 560148"] One thing to take into consideration with passives that few guides will tell ya. Even though the box can be small since there is no port takaking up air space, you still have to make sure the box is big enough to allow clearance inside for the passives to not hit the main drivers. If you do a 2 sub setup with the max height you can fit in your trunk then you need 4 passives, so some woudl be on the side. Since 2 sub setups are common i though it'd bring this up. If space is an issue and that's why you used them you do still have to be careful with yoru dimensions on the box and watch which way they fire. Anyway I do use PR's in my setup. 2 av15h's in 4.7 cubes tuned to 25hz. It really does allow you get the extra outuput of ported without giving up all your space. Plus you can tune low easily this way. I do feel like it gives up just a bit on some of the lows compared to some smaller sealed setups. Not in actual SPL, but more in frequency response. Just a bit easier to get that strong low end balance I and alot of daily listeners want. White Girl style moving air lows. Super lows the car digs tho SNoopdan "love story mix" moves my rear seat and deck an inch or two on that 20hz opening. This is in a cadillac too, not a litttle toyota. Just saying for those who might try to go a normal size up from what they can fit ported since they saving air room, if you still cant' quite give the drivers normal air room, while it will sill play low, it wont' do it with the response you normally expect from such a low tuning. IDk what' I'd do in my car if i reddid it. 12's with Pr's could play silly loud at tunign and when you tune low that is still pretty musical but fun. My box now has the frequency response of a big sealed box, but just has great overall output since I used 2 15's do it it. A sealed box with 15's wouldn't have the extra oomph around 40hz but still extend that low. [/QUOTE]
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