Question about Air pressure and Watts

XxAndreaxX

Member
Mar 18, 2016
169
-2
spain
hello, I bought a 8" sundown audio x8.

750W RMS but able to do 1000W also.

it sounds much louder than my previous 8" 110RMS sub, in the same enclosure.

then, I compared my sundown to a Cheap 15" 250RMS sub and no history, the 15" is another world, although quality, is Little bit less, especially at lower freq.

then my GF bought a 15" sub power acoustik Gothic with 1400RMS high excursión.

I Was thinking, 5-6 times more Watts, should sound like a beast.

but again, not much more overall pressure compared to the 250W 15" sub, only more quality at lows thanks to the extra excursión.

then i recenty Heard 2x 15" 500RMS watts subs and blew my mind.

less watts again but much more pressure (maybe twice) as the Power acoustik.

so my guess is, Watts at lows, are nothing more than a number, what you need to make bass, is airflow, either with woofer Surface, or with excursión.

you can have twice the pressure with 2 250W, than 1 with even 2000W

am I right?

Am I missing something???

 

Jeffdachef

Gunz That Turn on Nunz
Feb 5, 2013
17,261
252
South Coast Metro, CA
hello, I bought a 8" sundown audio x8.750W RMS but able to do 1000W also.

it sounds much louder than my previous 8" 110RMS sub, in the same enclosure.

then, I compared my sundown to a Cheap 15" 250RMS sub and no history, the 15" is another world, although quality, is Little bit less, especially at lower freq.

then my GF bought a 15" sub power acoustik Gothic with 1400RMS high excursión.

I Was thinking, 5-6 times more Watts, should sound like a beast.

but again, not much more overall pressure compared to the 250W 15" sub, only more quality at lows thanks to the extra excursión.

then i recenty Heard 2x 15" 500RMS watts subs and blew my mind.

less watts again but much more pressure (maybe twice) as the Power acoustik.

so my guess is, Watts at lows, are nothing more than a number, what you need to make bass, is airflow, either with woofer Surface, or with excursión.

you can have twice the pressure with 2 250W, than 1 with even 2000W

am I right?

Am I missing something???
yeah you forgot to list the amp you are using and your electrical upgrades that you've done along with the overall box specs used.

If you just used pre-made boxes, there's your problem. The box is what determines output along with how good your amp is and how fed your amp is.

Also that power acoustik gothic is a garbage overrated sub, its at best a 500 watts sub. Anything power acoustik its a lie, subs amps, head unit etc... There are garbage brands out there that you need to stay away from.

 

XxAndreaxX

Member
Mar 18, 2016
169
-2
spain
yeah you forgot to list the amp you are using and your electrical upgrades that you've done along with the overall box specs used.

If you just used pre-made boxes, there's your problem. The box is what determines output along with how good your amp is and how fed your amp is.

Also that power acoustik gothic is a garbage overrated sub, its at best a 500 watts sub. Anything power acoustik its a lie, subs amps, head unit etc... There are garbage brands out there that you need to stay away from.
hi bro, it might be garbage, but its connected to a 2250W RMS Amp.

If it would not have all that Wattage, it should be fried by now.

IMO it sounds veeery good for the Price, the best budget sub I Heard so far.

The enclosures we used are generic ported enclosures so enclosure is not a factor.

also the AMP we used, were all overpowered.

it seems like simple maths. more Surface multiplied by excursión, more air pressure. Seems that Watts are totally irrilevant below 50hz, maybe they might have a place for upper Bass and high range

 

Jeffdachef

Gunz That Turn on Nunz
Feb 5, 2013
17,261
252
South Coast Metro, CA
hi bro, it might be garbage, but its connected to a 2250W RMS Amp.If it would not have all that Wattage, it should be fried by now.

IMO it sounds veeery good for the Price, the best budget sub I Heard so far.

The enclosures we used are generic ported enclosures so enclosure is not a factor.

also the AMP we used, were all overpowered.

it seems like simple maths. more Surface multiplied by excursión, more air pressure. Seems that Watts are totally irrilevant below 50hz, maybe they might have a place for upper Bass and high range
you still didnt answer my question.

You also never clamped tested the amp to see how much watts was actually going to the sub in the first place. My buddy clamp tested 500 clean on the oscope before his gothic gave out so yeah its garbage. You might not have anywhere close to as much power as you think dude.

You still havent listed the amplifier model nor your electrical

You also used prefab generic boxes which are beyond garbage for any kind of performance so thats THE BIGGEST factor. This is your biggest fail right here.

You literally brushed past the most important parts and just think about cone area aka the noob way of doing things, shoving a bunch of big subs in too small of boxes thinking you'll be loud.

A single 8, properly fed power in a perfect enclosure will destroy a 15 in a prefab box.

 

shredder2

CarAudio.com Elite
Nov 19, 2017
2,199
197
Az
//content.invisioncic.com/y282845/emoticons/popcorn.gif.32dd9e22fd77e77bc3c907062768fcd2.gif
 

XxAndreaxX

Member
Mar 18, 2016
169
-2
spain
you still didnt answer my question.
You also never clamped tested the amp to see how much watts was actually going to the sub in the first place. My buddy clamp tested 500 clean on the oscope before his gothic gave out so yeah its garbage. You might not have anywhere close to as much power as you think dude.

You still havent listed the amplifier model nor your electrical

You also used prefab generic boxes which are beyond garbage for any kind of performance so thats THE BIGGEST factor. This is your biggest fail right here.

You literally brushed past the most important parts and just think about cone area aka the noob way of doing things, shoving a bunch of big subs in too small of boxes thinking you'll be loud.

A single 8, properly fed power in a perfect enclosure will destroy a 15 in a prefab box.
ah ok... no, no one was nor in a perfect enclosure, nor perfect amp, nor perfect sub... all Budget stuff, except my sundown

 

BOOMINGRANDPA

CHEAP A/F
Jan 8, 2017
7,077
19
NC
the 250rms subs are probably more efficient than a "heavier" sub so cheaper subs with lighter cone and higher db rating can be louder than bigger heavier sub with same power but cheaper subs just can't handle as much power.. so depends on what amp/power u have and what box it's in as to which sub is best for your system..

 

jar1zx

CarAudio.com Elite
Feb 13, 2011
586
1
Nashville Arkansas
The old ear spl meter isn't really that great.

Now a days spl meters are small and accurate

Check for sales at

Gp audio or ssa.

Increase in 3db is 2x as loud extra 10db is twice the air pressure.

 

Papermaker85

Banned
Dec 15, 2006
13,746
25
New orleans LA
hi bro, it might be garbage, but its connected to a 2250W RMS Amp.If it would not have all that Wattage, it should be fried by now.

IMO it sounds veeery good for the Price, the best budget sub I Heard so far.

The enclosures we used are generic ported enclosures so enclosure is not a factor.

also the AMP we used, were all overpowered.

it seems like simple maths. more Surface multiplied by excursión, more air pressure. Seems that Watts are totally irrilevant below 50hz, maybe they might have a place for upper Bass and high range
You are so far off I'll suggest reading loudspeaker cookbook

 

shredder2

CarAudio.com Elite
Nov 19, 2017
2,199
197
Az
hello, I bought a 8" sundown audio x8.750W RMS but able to do 1000W also.

it sounds much louder than my previous 8" 110RMS sub, in the same enclosure.

then, I compared my sundown to a Cheap 15" 250RMS sub and no history, the 15" is another world, although quality, is Little bit less, especially at lower freq.

then my GF bought a 15" sub power acoustik Gothic with 1400RMS high excursión.

I Was thinking, 5-6 times more Watts, should sound like a beast.

but again, not much more overall pressure compared to the 250W 15" sub, only more quality at lows thanks to the extra excursión.

then i recenty Heard 2x 15" 500RMS watts subs and blew my mind.

less watts again but much more pressure (maybe twice) as the Power acoustik.

so my guess is, Watts at lows, are nothing more than a number, what you need to make bass, is airflow, either with woofer Surface, or with excursión.

you can have twice the pressure with 2 250W, than 1 with even 2000W

am I right?

Am I missing something???
hi bro, it might be garbage, but its connected to a 2250W RMS Amp.If it would not have all that Wattage, it should be fried by now.

IMO it sounds veeery good for the Price, the best budget sub I Heard so far.

The enclosures we used are generic ported enclosures so enclosure is not a factor.

also the AMP we used, were all overpowered.

it seems like simple maths. more Surface multiplied by excursión, more air pressure. Seems that Watts are totally irrilevant below 50hz, maybe they might have a place for upper Bass and high range


Right on!... seems like you got it all figured out... //content.invisioncic.com/y282845/emoticons/suicide.gif.a649d21efc0d1fd4890a6428166586c1.gif

 

tymoto21

CarAudio.com Elite
Apr 15, 2008
1,007
0
wisconsin
simple put in a proper box a low powered sub will reach its limits. Either thermal from heat or mechanical from too much travel. This is when you need to move up to a higher powered sub.

When you go to a larger sub you have more cone area which helps get louder but if it's in a **** enclosure you will get **** results

Stick around and we can guide you to better budget equipment that will work good