Lanzar Opti 1535D, thoughts?

[iLL Ridge 10+ year member]

**** is that freq response accurately modeled? Sounds like a very flat curve for a bandpass box.

 

[power-fanatic07 5,000+ posts]

FUCK now they are out of stock. Damn it to hell.

 

[hatedonmostly 5,000+ posts]

Allcrispedup just bought 2 of these for a hella good price.

Yep, they had a limited amount for $150 each + free shipping and I grabbed the last two. That's what you get for hesitating when you see a good deal lulz

 

[hatedonmostly 5,000+ posts]

Optimum would be 1.3net @ 37Hz for the vented side, 3.8net sealed side. Sounds crazy, but that gives a +/-3dB response (anechoic) of 22Hz to 60Hz.

That's the default box that WinISD recommends, but that sound pretty far fetched to me, imo...

But I am using a 4th order too so we shall see

 

[Kross6622 10+ year member]

That's the default box that WinISD recommends, but that sound pretty far fetched to me, imo...
But I am using a 4th order too so we shall see

u would

 

[infamous_e46 5,000+ posts]

i cant wait till it gets here

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[hatedonmostly 5,000+ posts]

u would

Don't get upset because you can't design 4th orders.

 

[audio_phill 10+ year member]

**** is that freq response accurately modeled? Sounds like a very flat curve for a bandpass box.

Properly tuned bandpasses are flat, just not alot of subs like them very well, need a low EBP for decent freq response in 4th order BP

That's the default box that WinISD recommends, but that sound pretty far fetched to me, imo...
But I am using a 4th order too so we shall see

When you take into account how far above Fs tuning is, you realize that the vented side would need to be smaller than standard 4th order vented just to keep gain down and the response at as low of a ripple as possible lol. Go any bigger and there will be a very noticeable spike around tuning, go any smaller and you'll notice a loss below Fs that high qts woofers should not have when dealing with the slope made possible by the sealed chamber. Only thing WinIsd cannot be used for is to model the inductance spawned upper end natural roll-off and circle port calculations (since it figures everything in with aero style coefficients.

 

[hatedonmostly 5,000+ posts]

I guess I'm going to listen to WinISD then and go with 2.7 ported, 7.24 sealed, tuned to 38, 55 sq in of port area. Any objections?

 

[power-fanatic07 5,000+ posts]

I guess I'm going to listen to WinISD then and go with 2.7 ported, 7.24 sealed, tuned to 38, 55 sq in of port area. Any objections?

I hope it sounds like dog shit

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[hatedonmostly 5,000+ posts]

I hope it sounds like dog shit



















































































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That's not nice. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[power-fanatic07 5,000+ posts]

That's not nice. //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

The world is a mean place //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[hatedonmostly 5,000+ posts]

hm

 

[power-fanatic07 5,000+ posts]

Not bad, what vehicle? How much power?

 

[hatedonmostly 5,000+ posts]

'98 Dakota, blowthrough. Hence the port being required to be in the middle

Going to have two DSC1500.1s strapped at 1.2 ohm...I'd assume somewhere between 3-4kW