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Paul Vina
 
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Default High effecany mid/high power 2 ohm sub??

The IDmax seems to be held in high regards within the
group. I don't know with the price difference if its worth it?




I think so. But I know people that have gone from ID to eD and vice versa.
You won't be disappointed either way.




Depending on weather I get some good mid bass drivers, I may consider a

sub
like the Shiva, with very low freq response (it will be installed in a

Buick
regal, HUGE trunk).



How low a sub plays has nothing to do with it's midbass ability.


My home system goes low. I noticed that most subs aren't
rated to go very low. Is this because their roll-off combined with the car
transfer function results in a more flatter response?



Exactly. Low bass rises at about 12dB/octave in a car so it the sub was
flat to 20Hz in free-air it would be WAY boomy in a car.


Or would I need a sub
with a -3dB pt at 15-20Hz to eq the system flat?


No.


Or am I missing something
all together here, does the box/sub combo extend the response pass
manufactures spec?



The type of box WILL come into play but ultimately the simple fact that it's
in a car will be it's saving grace.



I guess my overall goal is to have a flat system response down to 15-20Hz
with the ability to turn it up on occasion.



Why so low? About the only music that goes that low is classical or sound
effects on movies. Most people could cut their systems off at 30Hz, or
higher in some cases, and they wouldn't even notice.


My plans....

I just bought 2 Stinger speaker level to RCA level converters. I plan on
keeping the factory deck. The converters will send signal to 3 Pionner
Premier amps GMX-822, GMX-424 and GMX-412. I plan on using the 4ch amp

(424)
to power the component set, possibly bi-amp if I can find a cheap elec
crossover. I will use the big 822 to power a 2ohm sub (aprox 900W). The
small 2ch (412) will be used for rear fill or mid bass drivers. I want to
keep things stelth, so you won't know there is a stereo unless you turn it
up or open the trunk. Also I plan on adding an fm modulated CD changer.

I have my fingers crossed, I don't know what to expect, CD transmitted in

FM
to the factory deck to level converts to power amps???


Hope it dosn't sound like ****!




It should sound fine as long as you use good line output converters. I like
the Soundgate units myself.

Another option would be to keep the factory deck as planned but not use it.
Alpine used to make (and they stil might) a stand-alone Ai-Net changer
controller. It's the same size as their FM-mod changer controller but with
preamp output. You could mount that someplace hidden, like your glove box,
and control it by remote.


Paul Vina