HST-15 Enclosure Size

[Droopy]

I just picked up an HST-15 this past week and I'm trying to design my box. I want to tune it to 28hz and I have enough room for a 6 cu. ft. enclosure (6ft NET, 7.5ft Total). The dimensions would be 37"L x 18"W x 23.5"H. The SI website says 50 inches of port area, so the port would be 3" x 16.5". My question is will this box be too big? Do I need to adjust my port size? I am mainly wanting low tuned SPL out of this.


From SI site : Vented enclosure: 3.0 ft^3 tuned to 20 Hz. >50 in^2 of port surface area

P.S. SI is having a huge sale on HST's.... only $8,999.99 to $9,999.99!!

[Grinder]

The recommended 3 ft^3 at 20 Hz in WinISD looks ideal for flat response and maximum extension. <edit> 8" port tube (50.27 in^2) at 2kw = 20.7 m/s at 19 Hz. Vent length is a whopping 106.6"

6 ft^3 at 28 Hz looks peaky as hell (+7.4 dB at 29.4 Hz). 124.3 dB at 29.4 Hz. Tuning higher will increase SPL further (and vice versa). Same goes for box size (larger = higher SPL. Only ~2 dB more at 12 ft^3 though)).

An 8" port tube (50.27 in^2) at 2kw = 39 m/s peak at 28 Hz. More port area = less compression = higher SPL <edit> vent length 22.8"

A pair of 8" port tubes (100.53 in^2) = 19.5 m/s peak (17 - 22 m/s is said to be ideal). <edit> vent length is a whopping 100.5"

<edited>

[89grand]

Wow, you actually bought a $9000 subwoofer?

[Jdunk54nl]

Wow, you actually bought a $9000 subwoofer?

They are $1000 usually, must be a pricing issue with the website and someone added an extra 9.

[Droopy]

Wow, you actually bought a $9000 subwoofer?

LOL No, it's a typo they are $899 and $999. Also I bought mine used from a member on here.

[89grand]

LOL No, it's a typo they are $899 and $999. Also I bought mine used from a member on here.

Oh ok, that seems a lot more reasonable. lol

[dumdum]

It’s likely supply issues and no stock, so they don’t want the orders to come in like eBay do to prevent taking adverts off

[jrwalte]

Or he only sells them to people he likes now and you have to get the coupon code that knocks off 90% hah