A subwoofer's ability to play low

[Flex68 10+ year member]

fs, mmd, mms, and I think vas...

I am guessing that mmd and mms were something you took into high account when building ur system, then....?

 

[Flex68 10+ year member]

Check out Hoffman's Iron Law and how it comes into play regarding the OP.

This "law" pertains to three factors: small box, deep extension, and high sensitivity.

It basically states that one can have only two of the three parameters when designing a speaker system, i.e., if you're wishing to hit the lows (extended low-frequency performance) and small box size is also of importance, one must accept low efficiency from the driver/enclosure.

 

[psych0ticnemes1 5,000+ posts]

Check out Hoffman's Iron Law and how it comes into play regarding the OP.
This "law" pertains to three factors: small box, deep extension, and high sensitivity.

It basically states that one can have only two of the three parameters when designing a speaker system, i.e., if you're wishing to hit the lows (extended low-frequency performance) and small box size is also of importance, one must accept low efficiency from the driver/enclosure.

I'll make the box as big as it takes to enhance the 20-30htz range. WINISD seems to produce a massive enclosure to reach a flat response.

 

[Flex68 10+ year member]

WINISD wud prolly be the last one I wud trust

 

[psych0ticnemes1 5,000+ posts]

WINISD wud prolly be the last one I wud trust

Why's that? What would you recommend for modeling a subwoofer?

 

[pro-rabbit 5,000+ posts]

Why's that? What would you recommend for modeling a subwoofer?

For an "in car response"? RTA... no program is actually going to worth a crap for offering much other then what the enclosure would do in an open area.

 

[psych0ticnemes1 5,000+ posts]

For an "in car response"? RTA... no program is actually going to worth a crap for offering much other then what the enclosure would do in an open area.

True. I figured it would at least be a starting point toward determining how subs might perform in different volume/ tuned enclosures, minus cabin gain.

 

[ThatChevyGuy 5,000+ posts]

why the fuck are you using type e's?

Get rid of em! Problem solved

 

[psych0ticnemes1 5,000+ posts]

why the fuck are you using type e's?
Get rid of em! Problem solved

They were an experiment. Overall they aren't bad, just not the same quality I'm used to.

 

[ThatChevyGuy 5,000+ posts]

They dont get low, even sealed. I mean if you did 4 ported with lots of port area tuned at 30hz they might. Or 6 in large sealed enclosures with fill and some power

 

[psych0ticnemes1 5,000+ posts]

They dont get low, even sealed. I mean if you did 4 ported with lots of port area tuned at 30hz they might. Or 6 in large sealed enclosures with fill and some power

Do you know this from experience or just looking at their specs? I know the specs don't look good for low end production.

 

[wickedwitt 10+ year member]

I have three of the 2012 Alpine Type E 12"s in 6 cubes tuned to 28 htz, desperately trying to increase my low end. I think it has more to do with my vehicle than the setup. I'm going from an Escape to a Vibe, which is really peaky. The lows just aren't as profound as in the Escape, which I loved.

Disconnect one sub and let it be a radiator. I bet you'd gain overall output and a ton of low end.

 

[psych0ticnemes1 5,000+ posts]

Disconnect one sub and let it be a radiator. I bet you'd gain overall output and a ton of low end.

I'll give it a shot. How does a sub acting as a radiator help? I know the two subs will be seeing 3 cubes each, so I can understand how I could gain some low end.

 

[wickedwitt 10+ year member]

I'll give it a shot. How does a sub acting as a radiator help? I know the two subs will be seeing 3 cubes each, so I can understand how I could gain some low end.

Yes, each sub would 'see' more box so that's your low end. The passive radiator would act like increased port area, and unless you are already over port size, that should increase output across all frequencies. Just make sure you can wire your amp up to a decent ohm load just running the 2. (I know, preaching to the choir)

 

[ThatChevyGuy 5,000+ posts]

Do you know this from experience or just looking at their specs? I know the specs don't look good for low end production.

I had 3 12" type r's and built 3 boxes for them