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Biggest BlendZilla so far! - Page 4

post #91 of 112
Hi Vic C and Gino.................... the enclosures are this size because they are a hybrid Transmission line/Reflex allignment. The volume was needed to allow for the 1/4 wavelength line at the driver's SD.
Andrew
post #92 of 112
Bah, Infinite Baffle or nothing Renting Schmenting, just means you need to be more creative

SD? Effective area?

Do you mean Fs? Free air Resonance? Or Fc, tuning frequency?
post #93 of 112
That bar is sooo high, it looks like a toothpick from where I am standing, seriously awsome. I was just talking to a friend about blending, it's a shame we can't all enjoy it. Congrats on truly a one of a king setup!!!
post #94 of 112
Thread Starter 
Quote:
Originally Posted by Mark_A_W View Post

Bah, Infinite Baffle or nothing Renting Schmenting, just means you need to be more creative

I'll have to experience infinite baffle for myself... but don't scoff at these subbies... you have no idea!
post #95 of 112
Oh, I can imagine, I've heard and built many subs - 15 or so.

I currently have four 15" Tempests in an IB, I imagine it's broadly similar Except the IB's probably more subtle, it's a drier sound.

Not that I ever get to turn it up anymore...kids..

I'm just joshing with ya - those drivers are HUGE. Be careful, you might do structural damage to the house.
post #96 of 112
Hi Mark, by SD I do mean effective cone area.............the tunnel starts at 1.3 times SD and is a constant taper to 0.75 times SD....................so in the purest sense it's not a full TL as the theory states the final vent area should equal SD.
The vent opening size and length at the end of the taper follows the Thiele Small parameters for an equivalent box volume Bass Reflex, hence the term hybrid TL/Reflex.

In testing what happened is that the box completely unloads below the tuning frequency allowing for bass extension to 10Hz at 100db output..................in reality the damn thing seems to think its an IB.

If you have a spare tempest you should try it out.

The really interesting thing with the driver is that it actually has a free air resonance of 48Hz. The tunnel length calcs are based on this.
post #97 of 112
Quote:
Originally Posted by Mark_A_W View Post


SD? Effective area?

Do you mean Fs? Free air Resonance? Or Fc, tuning frequency?

Um I have big speaker in really heavy box that rumble when movie is on.


I swear I feel like an idiot 90% of the time on this forum!
post #98 of 112
Quote:
Originally Posted by dokworm View Post

I swear I feel like an idiot 90% of the time on this forum!

Phew!!!

I'm not the only one then.....
post #99 of 112
I am planning my next subs, going to use these: http://www.tcsounds.com/lms5400.htm in the 18", I have 2 of them on order.

I was going to go with 2 PR's again in a box like my Stryke HE-15 that I am currently using, but, this looks really interesting to try. I will have to look into this more.

ajw056 can I pm you for more info on this design?

John
post #100 of 112
No problems John, or just check out the website page..............not sure if I'm allowed to post a link, but I guess the mods will step in if they have any objections:

www.aslanacoustics.com.au

Go to subwoofers and Atlantis.
Andrew
post #101 of 112
Quote:
Originally Posted by ajw056 View Post

Hi Mark, by SD I do mean effective cone area.............the tunnel starts at 1.3 times SD and is a constant taper to 0.75 times SD....................so in the purest sense it's not a full TL as the theory states the final vent area should equal SD.
The vent opening size and length at the end of the taper follows the Thiele Small parameters for an equivalent box volume Bass Reflex, hence the term hybrid TL/Reflex.

In testing what happened is that the box completely unloads below the tuning frequency allowing for bass extension to 10Hz at 100db output..................in reality the damn thing seems to think its an IB.

If you have a spare tempest you should try it out.

The really interesting thing with the driver is that it actually has a free air resonance of 48Hz. The tunnel length calcs are based on this.

Ahh - now I get it, sorry. I have designed a TL once - I did the Loudspeaker Kit TL6, but due to size constraints it was never quite what I wanted (needed to be 1.5x as big). From memory it's a 1/4 wave tapered TL as well.

They sound interesting, next time I'm in Cairns I'll have two reasons to drop in...3 if I need some dental work done
post #102 of 112
Thread Starter 
Quote:
Originally Posted by Mark_A_W View Post

I'm just joshing with ya - those drivers are HUGE. Be careful, you might do structural damage to the house.

Hehe, yeh well ... let's just say it's not my house
post #103 of 112
Thread Starter 
Quote:
Originally Posted by ajw056 View Post

In testing what happened is that the box completely unloads below the tuning frequency allowing for bass extension to 10Hz at 100db output..................in reality the damn thing seems to think its an IB

Good one Andrew
post #104 of 112
Gino- Awesome screen shots - I'm jelous, but not for too long! If all goes as planned, I'll have a 'Zilla driving a pair of mint XG135LC's on an 11' wide 2.35 SMX screen.
I'm really interested in how wide your blending zone is as I'm figuring on about 10%.
Could you do a screen shot of the whole screen showing gray bars with the blending turned off so we could see how big (small) the zone really is?
Also, if I remember you have an HD-SDI output on your HD-DVD. Have you used it with 'Zilla, and if so, what is your opinion in comparison to analog component?

Many thanks,
Bob
post #105 of 112
Very interesting design. I was actually conciderign doign something like that in the future.

I have a 10" Sub I designed with a very deep port and I was thinkign of adding more lenght to the port in just such a way. I guess it is an exceptable design method.

Now I understand why the box is SO BIG, It in realaity isnt on the woofer.

I bet those 15" subs sound more like pro dual 18's

Vic
post #106 of 112
They sound frightening Vic.....................Gino tells me he hasn't had anyone in who hasn't yelled an expletive at the first cannon shots in Master and Commander...........male and female alike!
post #107 of 112
Just gorgeous Gino !!!!!!!! Great work on the blend and the screen shots!

Art
post #108 of 112
Thread Starter 
Yes Art... CRT still has some legs left in 'em Who would have thought... 13' wide 1.0 gain could look like that.

Have been watching keenly where you will be heading in the next 12-18 months.
post #109 of 112
Thread Starter 
Quote:
Originally Posted by Boilermaker View Post

Gino- Awesome screen shots - I'm jelous, but not for too long! If all goes as planned, I'll have a 'Zilla driving a pair of mint XG135LC's on an 11' wide 2.35 SMX screen.
I'm really interested in how wide your blending zone is as I'm figuring on about 10%.
Could you do a screen shot of the whole screen showing gray bars with the blending turned off so we could see how big (small) the zone really is?
Also, if I remember you have an HD-SDI output on your HD-DVD. Have you used it with 'Zilla, and if so, what is your opinion in comparison to analog component?

Many thanks,
Bob

Hi Bob, I'll be sure to get those photos done for you this weekend, have been planning to do more to show the blend etc.. but have been in Sydney at a dental conference last week.

You won't regret your purchase! Tim just sold another DVX to Russia IIRC.

Blendzone is 10%. I've tried HD-DVD over HD-SDI through the DVX.. looks very good, noticeable difference as compared to component. Haven't compared it to HDMI though. I haven't been able to continue using it though, as I'm currently using the VP50 for my CIH setup. I'm looking into the Radiance with HD-SDI so I can go back down that path.
post #110 of 112
Thread Starter 
Quote:
Originally Posted by Vic C View Post

Now I understand why the box is SO BIG, It in realaity isnt on the woofer.

I bet those 15" subs sound more like pro dual 18's

Vic

You've got that right! The pair of them challenge my D-box Odyssey Motion Simulators I just put in when it comes to vibrations
post #111 of 112
Quote:
Originally Posted by Gino AUS View Post

You've got that right! The pair of them challenge my D-box Odyssey Motion Simulators I just put in when it comes to vibrations


You're bloody mad mate.......................................................
Have fun.
post #112 of 112
Gino - tried sending you a PM, your box is full.

Anyhow, did I read somewhere you got yourself a pair of the R1's? would love to see some pics if you've got em
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