punchy? boomy? shaddap will ya....

[Beatin' 10+ year member]

I hate when people say "derp derp derp sealed is punchy and ported is boomy derp derp derp".

From what I understand, boomy bass is punchy bass that is very loud. Some times "boomy" bass is simply perception due to lower frequencies being much louder than upper frequencies because of a particular sub/box combo. The attack of upper bass is not recognized as easily as the louder lower notes, hence, "boomy".

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[ciaonzo 5,000+ posts]

Boomy to me is overhang leading to a lack of definition, not really limited to high or low bass.

 

[cfox10 10+ year member]

I hate when people say "derp derp derp sealed is punchy and ported is boomy derp derp derp".
From what I understand' date=' boomy bass is punchy bass that is very loud. Some times "boomy" bass is simply perception due to lower frequencies being much louder than upper frequencies because of a particular sub/box combo. The attack of upper bass is not recognized as easily as the louder lower notes, hence, "boomy".[/quote']

Sealed=Punchy

Ported=Boomy

Jk. But the problem here is that:

Most people have only heard systems that have prefab sealed and ported boxes. The prefab ported boxes tend to have horrible rolloff when it comes to frequencies out of their designed tune. So...sealed, in that case sounds better.

If these people heard a properly tuned and built ported box, they wouldn't notice a difference until you opened the trunk.

That and people are full of shit.

 

[SounDrive Pro Seller]

Properly ported boxes will still have punch.. But still, the punchiest setup I've heard was a pair of 15s sealed.. Of course that was a long time ago, so it probably wasn't a loud as I thought it was back then.

 

[cfox10 10+ year member]

Properly ported boxes will still have punch.. But still, the punchiest setup I've heard was a pair of 15s sealed.. Of course that was a long time ago, so it probably wasn't a loud as I thought it was back then.

Reminds me of years ago when my brother had two 15's in his s10 truck... running off some old school us amps... I remember it taking my breath away. Now he's running more power, more subs, and it doesn't even come close to taking my breath away. Either I remember things incorrectly, or it was the truck/setup.

 

[Beatin' 10+ year member]

Boomy to me is overhang leading to a lack of definition, not really limited to high or low bass.

overhang and group delay is inversely proportional right?

If a sub cone can move very quick to the signal it's given, then it is going to stop late when the signal ends. This is typically the result of the cone not having any "air spring" control (ie: sealed box too big, free air...)

If the cone is controlled too well at a particular frequency, you get high group delay. The note plays later and louder, but it ends quick with no overhang.

First of all, is what I'm saying correct? Second, could this cone behavior dictate what sounds boomy or punchy?

 

[ciaonzo 5,000+ posts]

overhang and group delay is inversely proportional right?
If a sub cone can move very quick to the signal it's given' date=' then it is going to stop late when the signal ends. This is typically the result of the cone not having any "air spring" control (ie: sealed box too big, free air...)

If the cone is controlled too well at a particular frequency, you get high group delay. The note plays later and louder, but it ends quick with no overhang.

First of all, is what I'm saying correct? Second, could this cone behavior dictate what sounds boomy or punchy?[/quote']Overhang to your ear could be the result of many things. Not just high Q, but also energy storage in structures. Even if the driver starts and stops on a dime, if the enclosure or the acoustic environment is still resonating that will smear the overall presentation.

Food for thought.... You can have an absolutely perfect amplifier, driver, enclosure, and acoustic environment, and still have lack of punch or attack simply because of phase issues between your midbass and subbass. With EQ settings as well.

There are so... many... things... that lead to the final presentation being what you want. Not just the driver.

 

[ciaonzo 5,000+ posts]

overhang and group delay is inversely proportional right?
If a sub cone can move very quick to the signal it's given' date=' then it is going to stop late when the signal ends. This is typically the result of the cone not having any "air spring" control (ie: sealed box too big, free air...)

If the cone is controlled too well at a particular frequency, you get high group delay. The note plays later and louder, but it ends quick with no overhang.

First of all, is what I'm saying correct? Second, could this cone behavior dictate what sounds boomy or punchy?[/quote']Some good questions in here, though. I would suggest reading into Qes and Qms and how they affect overall Qts. Also read into how mass and inductance figure into things. Things may begin to come together for you. Do it while listening to the song "Air Cal" by Com Truise, it will sink in faster.

 

[Jeffdachef 5,000+ posts]

Reminds me of years ago when my brother had two 15's in his s10 truck... running off some old school us amps... I remember it taking my breath away. Now he's running more power, more subs, and it doesn't even come close to taking my breath away. Either I remember things incorrectly, or it was the truck/setup.

thats the same with most bassheads, when i first started out, a pair of JL W0s takes my breath away. Now, its like soo rare to get that feeling again. Unless its 4 15s (or bigger) in a 4th/6th order or properly walled, nothing else takes my breath away.

 

[Beatin' 10+ year member]

Properly ported boxes will still have punch.. But still, the punchiest setup I've heard was a pair of 15s sealed.. Of course that was a long time ago, so it probably wasn't a loud as I thought it was back then.

I got 2 AT strato 15's in a sedan. I give them about 600wrms, kick drums synths in the rap music I listen to I often boost to 0db recording volume so they're typically getting up to 1,500 watts briefly at full volume.

It's loud.........but not down the block loud.

I notice that while the system plays tight, accurately, or "punchy" at somewhere between 60-70hz, it is very loud and "boomy". From what I understand, the frequency range has the cars resonance frequency, so the bass is amplified louder.

This goes right back to the argument that boomy bass that some people describe is simply amplified bass, regardless of box design (ie: ported vs. sealed, etc...)

 

[SounDrive Pro Seller]

I got 2 AT strato 15's in a sedan. I give them about 600wrms' date=' kick drums synths in the rap music I listen to I often boost to 0db recording volume so they're typically getting up to 1,500 watts briefly at full volume.
It's loud.........but not down the block loud.

I notice that while the system plays tight, accurately, or "punchy" at somewhere between 60-70hz, it is very loud and "boomy". From what I understand, the frequency range has the cars resonance frequency, so the bass is amplified louder.

This goes right back to the argument that boomy bass that some people describe is simply amplified bass, regardless of box design (ie: ported vs. sealed, etc...)[/quote']

A lot of that could be the clipping introduced into the music when you boost the song to 0db.. Very few songs can be amplified to 0db without clipping