Recommended 18 inch subs

scottn29 · Post by **scottn29** » Tue Feb 16, 2010 5:31 pm

NewOldStock wrote:
ChaosWarlord26 wrote:2 15's have 353.25 inches of cone area and 1 18 has 254.34 inches of cone area. More cone area is not always better.
ChaosWarlord26 is right - 2 15's SEEM to have more cone area, but if you do the math, the single 18 has slightly more.

Bigger subs are more efficient as a general rule - however, for a good IB sub you really need to look at the Le (inductance) of the sub, the cone area and its xmax.

for good IB, you need as low an inductance, maximum cone area and as much XMAX as possible. Take the Acoustic Elegance (Highly regarded as THE BEST IB sub available)
http://www.aespeakers.com/drivers.php?driver_id=8

Xmax of 18.5mm
and an Le (inductance) of a CRAZY LOW .33mH - lower the better.

Take a look at the Dayton HO 10 (also highly regarded as a real SQ sub) and it has a low Le of 1.9mH.

The Fosgate T215D4 on the other hand has a high Le of 5.5mH - more like an SPL sub than a SQ sub

The Focal Utopia has an Le of 2.05mH ...

my point is - you need something to move lots of air (15", 18" or multiple 10/12's) and it needs to be accurate and exceptionally responsive - otherwise it will just be woofing air without producing accurate sound.

So, in your search for an IB sub IMO AE would be as close to perfect as you can find.

Can you elaborate on what you mean here? 2-15's have more cone area period than a 18, almost a 1/3 more. Now displacement can come into factor, but 2-15's has and will always have more cone area than a 18

gridracer · Post by **gridracer** » Tue Feb 16, 2010 8:09 pm

NewOldStock wrote:
ChaosWarlord26 wrote:2 15's have 353.25 inches of cone area and 1 18 has 254.34 inches of cone area. More cone area is not always better.
ChaosWarlord26 is right - 2 15's SEEM to have more cone area, but if you do the math, the single 18 has slightly more.
.

Am I missing something how does 1 18 have more cone area than 2 15's?

Pedi · Post by **Pedi** » Wed Feb 17, 2010 5:39 am

I have been looking for a (preferably NIB) Stroker 18" D4, since one of my 18"s was single VC instead of dual VC...

oldschoolfan · Post by **oldschoolfan** » Wed Feb 17, 2010 7:52 am

I am pretty sure he bought that box from a Swede.

NewOldStock · Post by **NewOldStock** » Wed Feb 17, 2010 1:27 pm

denim wrote:
kg1961 wrote:i would say 2 15"sub have more area 30" than 1 18" but that just me
Umm...

2 - 15" drivers: 353.25 sq. inches
1 - 18" driver: 254.34 sq. inches

my bad - when I did the calc I read it as 354 not 254 - I edited my other post - took out the brain fart.

Post by **joerg** » Thu Feb 18, 2010 11:30 am

oldschoolfan wrote:I am pretty sure he bought that box from a Swede.

IKEA-Discover the posibilities

Post by **joerg** » Fri Feb 19, 2010 2:53 pm

I found a enclosure build guide online! Did anybody try to use a 18" stroker in a 40liter sealed enclodure???

Post by **kg1961** » Fri Feb 19, 2010 3:04 pm

see the info but that seams small to me i think the 47 l would be better but it said 97l for spl a most subs a smaller box for spl?
best of luck

NewOldStock · Post by **NewOldStock** » Fri Feb 19, 2010 4:32 pm

smaller box for SPL vs SQ sounds right, at least thats what I always seem to see in manuals - though someone will have to explain why that is. my guess is smaller box = higher power handling?

Post by **ttocs** » Fri Feb 19, 2010 4:44 pm

I don't know if I have ever seen a sealed spl system, thought that what ports were for.

NewOldStock · Post by **NewOldStock** » Fri Feb 19, 2010 7:01 pm

ttocs wrote:I don't know if I have ever seen a sealed spl system, thought that what ports were for.

I agree with ttocs here... While I have only ever heard 1 SPL system, I have looked at lots of build logs and whatnot and they all had/have ported enclosures.

Post by **joerg** » Tue Feb 23, 2010 5:13 pm

So i picked up my stroker yesterday! The auction said it was a singel 4Ohm but when i first looked at it i saw it is a 18D4

I can´t wait to hear it!

I always thought it´s big but that thing is huuuuge!

oldskoolmseriesfan · Post by **oldskoolmseriesfan** » Tue Feb 23, 2010 7:52 pm

joerg.... you fricken tease

Pedi · Post by **Pedi** » Tue Feb 23, 2010 10:42 pm

Oooooh... I want another one of those aswell... Lovely speaker...

Post by **ttocs** » Wed Feb 24, 2010 7:22 am

if you think that is big, wait till you build the box. I remember seeing a system with 2 in a ported enclosure. I asked if they just ported and carpeted their fridge or what the enclosure was made of?!

Pedi · Post by **Pedi** » Wed Feb 24, 2010 7:39 am

ttocs wrote:if you think that is big, wait till you build the box. I remember seeing a system with 2 in a ported enclosure. I asked if they just ported and carpeted their fridge or what the enclosure was made of?!

Cool, I am going to have 2x18" Stroker in my install... I need a big car...

Post by **joerg** » Wed Feb 24, 2010 10:27 am

Pedi wrote:
ttocs wrote:if you think that is big, wait till you build the box. I remember seeing a system with 2 in a ported enclosure. I asked if they just ported and carpeted their fridge or what the enclosure was made of?!
Cool, I am going to have 2x18" Stroker in my install... I need a big car...

Did u find one yet?

Pedi · Post by **Pedi** » Wed Feb 24, 2010 10:30 am

Nope...

Post by **ttocs** » Wed Feb 24, 2010 11:19 am

can't believe everyone would want to use such an obselete, badly designed woofer

Pedi · Post by **Pedi** » Wed Feb 24, 2010 12:38 pm

ttocs wrote:can't believe everyone would want to use such an obselete, badly designed woofer

blah-blah-blah...

Oldschool still rocks in my world...

NewOldStock · Post by **NewOldStock** » Wed Feb 24, 2010 1:21 pm

MMMmmm Stroker

I dont care if they sucked... those are some sexay sumbitches!

reaper68 · Post by **reaper68** » Wed Feb 24, 2010 2:55 pm

sound splinter rlp 18 would be a nice driver
Image dynamics 18 IDW would be nice if you could ever find one
There is a guy over at DIYMA that has aura 1808's for sale but remember they are svc 8 ohm

NewOldStock · Post by **NewOldStock** » Wed Feb 24, 2010 4:05 pm

reaper68 wrote:sound splinter rlp 18 would be a nice driver
Image dynamics 18 IDW would be nice if you could ever find one
There is a guy over at DIYMA that has aura 1808's for sale but remember they are svc 8 ohm

Yeah, but none of them have that old-skool look and feel like M&M's, XTR's, Exacts, Strokers... but I dont think M&M/Orion/SoundStream made 18's in those models like Cerwin Vega. Could be wrong though, that was a LONG time and MANY dead brain cells ago.

Anyone know if there are any M&M 10's or 12's left in this world?

oldschoolfan · Post by **oldschoolfan** » Wed Feb 24, 2010 5:14 pm

Don't know about the Godfathers but I got a RF Pro 18.

reaper68 · Post by **reaper68** » Wed Feb 24, 2010 5:58 pm

How about these, although I only own a pair of 15's

I would put a dollar on the Hart MS1000's keeping pretty close to the strokers in output. Mccauley sound can still recone them from what I understand.

Recommended 18 inch subs

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