1980 Monte Carlo with no roof (box and system q's) - Car Audio Classifieds!
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Old 09-14-2015, 07:09 PM
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Default 1980 Monte Carlo with no roof (box and system q's)

Hey guys. As some of you have seen, I did some work on a candy paint Monte Carlo. I have been helping this guy shop for gear and I'm trying to talk him into a 15" or 2

The cabin (roof) has been permanently removed. So its basically like a convertible I guess?

What would be some good enclosure designs? 2 subs behind seats with (or without) a box for IB?

Sub in middle or back of trunk with port up, with standard slot port? Will be turning to 26-28 most likely... After I run some test tones with a standard slot port enclosure to see what frequencies the trunk responds to.

He currently has a bandpass box with a single 10 up against the rear seats (all the way in the front of the trunk on the little ledge) it sounds OK but no real low end response (its about 1 cube)

He has tons of extra batteries and a kicker cx1200 (rated 1200 @ 2, not sure if that's legit, its very small) among other amps. I don't think a h/o alt is going to be needed here.

Any suggestions on subs and box? Any feedback welcomed!

I had him order a PAC pdlc21 to use as a line driver since he likes the deck in there and its probably only 2v(and because I'm running stock h/u with the same unit with 0 gain on my 4 channel and its still pretty loud)

If this was a bad idea, please tell me why. I am using the unit on speaker outputs, not rca to rca like he will be doing. (BTW, does the clip light work for rca-rca mode or just loc mode?)
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Old 09-14-2015, 07:16 PM
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How many amps is he running? One?
I think the line driver is not needed and an additional source of noise unless he has a low voltage situation.
Even a 2v RCA split into a reasonable amount of channels is OK as long as the gain can be set to compensate.
Your situation is different than RCA line level, zero gain is not a plus if you have to raise the noise floor to get there.
The more components in a signal chain the more chance for hiss/whine/ buzz etc.
It has no roof so maybe it would be hard to hear but I'd stick to the 'less is more' school of thought if it were me.
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Old 09-14-2015, 07:21 PM
Car audio classifieds, stereo sales, subwoofer amps mids classified caraudio, BANNED!!
 
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ive heard that you have to tune lower when it's an open top like that, or thats what my buddy with a shop told me lol they built a custom car with the top removed permanently and converted to fiberglass to make it look clean
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Old 09-14-2015, 08:18 PM
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Quote:
Originally Posted by craiggus365 View Post
How many amps is he running? One?
I think the line driver is not needed and an additional source of noise unless he has a low voltage situation.
Even a 2v RCA split into a reasonable amount of channels is OK as long as the gain can be set to compensate.
Your situation is different than RCA line level, zero gain is not a plus if you have to raise the noise floor to get there.
The more components in a signal chain the more chance for hiss/whine/ buzz etc.
It has no roof so maybe it would be hard to hear but I'd stick to the 'less is more' school of thought if it were me.
Currently: a rf 400rms @ 4 bridged and a small alpine 4 channel.

But he needs/wants more, so a bigger amp will be put in/purchased.

I'm pretty sure that old school rf 800w or the kicker cx1200 will do the job though.

Not sure about the front stage though. I think he wants 2 more tweeters. I'll probably put a separate amp for the mids since they are 8ohm (I'll get a small 200w rms~ish at 4 ohm amp for them maybe)

I run the line drivers for loc mostly. The line driver is just nice to have IMO. I run 0 gain on my 4 channel because I do get noise with it turned up. There is still a faint whine, but I just barely heard it a few days ago randomly. Usually volume drowns it out since its not much at all to begin with.

I have the 4 channel gain nearly half for the mids/tweets and its still not very loud. And the speakers aren't being overpowered or clipped, so I figured it was the input voltage. I noticed a huge difference from a 4v unit vs my line driver set at 4v.
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Old 09-14-2015, 08:23 PM
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Quote:
Originally Posted by mitchell0715 View Post
ive heard that you have to tune lower when it's an open top like that, or thats what my buddy with a shop told me lol they built a custom car with the top removed permanently and converted to fiberglass to make it look clean
Is that because higher frequencies tend to respond better in sealed environments?

I know my car starts to rolloff at 41hz and above (and resonates, which caused a few subs to blow, luckily under warranty and replaced) it was kinda odd because I never experienced that before. It just sounded like it was rattling the roof and I didn't feel anytning, where as my old SUV did fine (newer cars = thinner, less reenforced panels/roofs?)
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