high numbers in a trunk?

[sittdogg 0]

whats up, I've had 6 systems in 4 cars, 2 of my cars were hatchback. I had 1 sedan with a sub in the trunk for a year and a half, at that time I was'nt trying to make my system louder, now in my present car I'm on my second system and I want to get louder. but the system is in the trunk. I know no matter what I do it wont be as loud as in a hatchback.

Is it possible to make a spl vehicle in a sedan. Are spl numbers as high as 150 achieveable in a trunk? My system is fairly loud now,I hit 137.8 at a local shop with my old system. but that was with 880 watts rms to a 15. I was'nt to impressed cause some guys were hitting 5-10 db more, with nearly the same wattage. I have alot of work to do cause I want to hit in the 140's.

does anyone have spl systems in a sedan, let me know what you hit.

Thanks

Edited December 7, 2005 by sittdogg

[KickinAudio 5]

153.6 has been done this season in a 4-door neon.

4th place at finals (db drag) was a 4 door trunk car (153)

This was all done with a pair of 12" subs.

[amatt85 0]

http://audioforum.termpro.com/ubb/ultimate...3/t/006110.html

[vladd 26]

i think jason's highest was 153, he has a stratus like moi, and i think his subs are two 10s

[UndercoverPunk 0]

You mean MR. Orion from Ohio?

I thought he was runnin 2 12's? Oh well I don't pay that much attention.

[KickinAudio 5]

This was all done with a pair of 12" subs.

i think his subs are two 10s

They are 12's. Thats why he competes in street B.

[vladd 26]

ah, i didn't even know which class he was in. Either way, if i was serious about competing, i'd say screw it to the trunkies, but thats me

[sittdogg 0]

damn 153 is pretty loud. I doubt I could come close to that with my amp. I have one 12 now with 880 rms going to it. Thinking of trying some different sub combos. like three 10's, 2 soundstream spl 15's, or maybe one fairly high powered 15 around 800 rms(memphis mojo, alphasonik 800.)

[sittdogg 0]

what are you hitting with that setup in your jeep? 150's?

[KickinAudio 5]

150.9 was my last score.

termlab,car off, one battery, sealed, on dash.

[sittdogg 0]

I dont like the dash or windshield mount readings. I've only had 4 db readings and the windshield mount type always read lower.

[KickinAudio 5]

Yup. Thats why Db Drag is the premier auto sound competition. Its the most "legal" and straight up score. No doors open bs.

[Patrick Simmons 0]

153.6 has been done this season in a 4-door neon.

4th place at finals (db drag) was a 4 door trunk car (153)

This was all done with a pair of 12" subs.

<{POST_SNAPBACK}>

That's pretty good for a trunk system especially.

[XtremeAudioConcepts 0]

is db drag with car off or on?

[KickinAudio 5]

off.

[tommyk90 3]

Yup. Thats why Db Drag is the premier auto sound competition. Its the most "legal" and straight up score. No doors open bs.

<{POST_SNAPBACK}>

Lol, i always get a kick out of these comments.

If you want the most legal, meter at the headrest. Afterall, that's what YOU hear when you play your stereo.

I don't see too many people sticking their head in the kick or on the windshield and saying "damn, thats loud"

[///M5 2,833]

Yup. Thats why Db Drag is the premier auto sound competition. Its the most "legal" and straight up score. No doors open bs.

Lol, i always get a kick out of these comments.

If you want the most legal, meter at the headrest. Afterall, that's what YOU hear when you play your stereo.

I don't see too many people sticking their head in the kick or on the windshield and saying "damn, thats loud"

That and the repeatability and consistency of the measurement mics they use is a joke as well. It should never be XXX.x db's. Ask any acoustician and they will tell you measuring tenths of a db is not real. The environment can change that quickly, and they use $2k mics with $2k+ power supplies not even counting the analyzer. IMO if it isn't a Bruel & Kjaer or a real competitors measuring device it is weighted strange. That and they don't use C weighting on measuring their response curves. Anything over 120dB should be measured with C weighting and I do like the headrest idea.

I actually know nothing about competitions as I have never witnessed one or been to one, but in my previous job all I did was measure acoustics with a $100k analyzer--which I still have regular access to

[KickinAudio 5]

Yup. Thats why Db Drag is the premier auto sound competition. Its the most "legal" and straight up score. No doors open bs.

Lol, i always get a kick out of these comments.

If you want the most legal, meter at the headrest. Afterall, that's what YOU hear when you play your stereo.

I don't see too many people sticking their head in the kick or on the windshield and saying "damn, thats loud"

Again, the headrest has too much variation. To each their own on a "reality" score.

The reason for the dash placement is to equal the playing field, its not intended where you hear the music, it

[KickinAudio 5]

Yup. Thats why Db Drag is the premier auto sound competition. Its the most "legal" and straight up score. No doors open bs.

Lol, i always get a kick out of these comments.

If you want the most legal, meter at the headrest. Afterall, that's what YOU hear when you play your stereo.

I don't see too many people sticking their head in the kick or on the windshield and saying "damn, thats loud"

That and the repeatability and consistency of the measurement mics they use is a joke as well. It should never be XXX.x db's. Ask any acoustician and they will tell you measuring tenths of a db is not real. The environment can change that quickly, and they use $2k mics with $2k+ power supplies not even counting the analyzer. IMO if it isn't a Bruel & Kjaer or a real competitors measuring device it is weighted strange. That and they don't use C weighting on measuring their response curves. Anything over 120dB should be measured with C weighting and I do like the headrest idea.

I actually know nothing about competitions as I have never witnessed one or been to one, but in my previous job all I did was measure acoustics with a $100k analyzer--which I still have regular access to

Termlab pressure sensors may not be NASA certified, but they are a feasible tool to use in the field. Think logically about using a $2k mic in the field and how they are abused, a termlab is by far suitable, accurate, and affordable for the purpose its being used for.

[///M5 2,833]

I realize it isn't possible to use a true measurement mic, but I am sure that the db variations from pressure sensor to sensor is well more than the uncertainty that they show the score to. Reporting tenths of a db is just a bit silly in my book.

As for the headrest variation, what we use for doing Sound Quality testing on vehicles is a Head and Torso simulator outfitted with ear canals and mics in each ear. Deadly setup for being accurate and repeatable, but again at $25k I know why they aren't being used in SPL comps.

[KickinAudio 5]

There would be way to many ties if it weren't for measuring in tenths. Look at every world finals in every organization for the past eight years, there would simply be not show without it that type of measuring. All of the top eight are usually within a db.

[trinitymatt 0]

we hit 148.3 in a saturn sedan with 1 15 + 1 2400 Watt amp. Doubled the amp but due to the cold weather at the comp only hit 148.8 with 1 2400 watt amp per coil. If you want pics of the install message me. with 1 amp it was a stock class sedan.

[KickinAudio 5]

I'd like to take a peak, thats impressive stuff

[trinitymatt 0]

I'd like to take a peak, thats impressive stuff

<{POST_SNAPBACK}>

Small trunk, big box.

inside, seat down.

In the lane, I had bad pic timing, it metered on a 3055 at 148.3