Dual 18" Subwoofer/Dual 18" Woofer question (1 Viewer)

[Thy Luc]

Am I too critial by wanting dual Maelstrom, each in
a separate 5 cubic foot box, sealed running from 40hz - 100hz,
then running dual BP1803's, ported from 40hz down?

Everyone seems to think that sealed woofer boxes give
the best sound, hence sealed maelstrom. If I want
to do some HT, turn on the BP1803's to rattle the house?
hehe

I don't like PR's and I don't like to listen to bass
guitar solos using ported boxes, but I love ported
boxes for HT. Feel free to post your thoughts.

Can I "hide" the 1803's far away from the main cabinet
which contains the maelstroms? ie, will BP's integrate
soundwise in the room - LOL

 

[Anthony_Gomez]

Thy, I have got a better idea for you. SInce you seem to have a substantial budget, about you do this:

get 4 Tumults and put them each in 3ft^3 sealed.

EQ them with a linkwitz transform.

then power them with a single crown k2 at 2 ohms per channel (or a pair of k2's if you want)

you are looking at 12ft^3 which is far less than the maelstroms w/ BPD1803s will take, and you will have WAY WAY more than enough headroom. Heck, it will probably about the same $$ in the end!

with the above, you are looking at 117db at 20hz anochaic with just a single K2!!!!!

 

[Scott Simonian]

with the above, you are looking at 117db at 20hz anochaic with just a single K2!!!!!

*sigh* I cant wait any longer. I think Im gonna have to knock over a bank or something.
:wink:

 

[Jack Gilvey]

I don't like PR's and I don't like to listen to bass
guitar solos using ported boxes,

Why? Any experience besides commercial subs? Which PR's don't you like?

 

[Thy Luc]

Sorry for being a pest, I can't make up my mind - lol
There are a few good designs that I like now based on
suggestions from the online community.

--get 4 Tumults and put them each in 3ft^3 sealed.

Is this the new adire woofer similar to brahma, super
long stroking ? What size is it?

If it's a super long stroker, everyone that I talk to says
that super long stroking woofers, ie, blueprint, brahma, etc.
are just not very musical beyond 70hz (give or take) at high
power, but they are great subs. If low pass them
at 100hz, do you think they will sound great for
bass guitar? I think my dual 12's running between
woofer and midrange are barely adequate, I'm toying
with the idea of replacing the 12's with dual 15's Lambda
for woofer/midbass in addition to the subs.

If I used Tumults, would it be best to make a seperate
cabinet or integrate them into the main cabinet ?

 

[Thy Luc]

--Why? Any experience besides commercial subs?
--Which PR's don't you like?

PR's, ported, sealed, etc. all have a personality (heh).
I like PR's for HT, video games, etc., but for the
music I listen to, I pefer not to use them.
I like ported for the low bass notes and I like sealed
for the high bass notes. Yeah, I know I'm crazy, but
I look to split to woofer into two subsystems using two different woofer types.

 

[Thy Luc]

--then power them with a single crown k2 at 2 ohms per
--channel (or a pair of k2's if you want)

I haven't done my amplifier homework yet, that comes later - heh. Is the crown K2 the amplifier of choice to run subs?
What other amplifiers should I look into that are
in the crown price bracket ? I don't want to buy
exotic amplification like Krell, Mark Levinson, Jeff
Roland, etc. I know there is better value out there, ie,
prousound gear.. hehe

 

[Dustin B]

Thy, give this post by Dan a look:
http://www.hometheaterforum.com/htfo...692#post761692
The Brahma and the Tumult are a lot different from other high excursion drivers. They don't have the inductance hump and should have no problem covering both the ranges you want to cover with a BP1803 and Maelstrom.

 

[Jack Gilvey]

PR's, ported, sealed, etc. all have a personality (heh).

Yes, they do. Which PR's have you used and in what alignments?

 

[Thy Luc]

Thanks for the inspiration. I think I might have

something that I like. Here goes.

Keep the 4 way design......

One 15" Lambda TD15X above and one below the line array.
One 15" or 18" long stroking sub below the array, design

a sealed box with a removable front baffle (plate) to
allow insertion of either a 15" tumult or 18" equivalent in
the future. This will be a 3 woofer subsystem per channel.

crossover frequency range - rough estimate

Tumult - 60hz low pass
Lambda 15's - 60hz - 300hz
PHL midranges - 300hz - 2khz
Ribbons - 2khz high pass.

My biggest fear was;

If I keep the 3 way design, using three Lambda's,
and if Lambda goes out of business, I would be
in deep trouble. What 15" woofer would do the same
job as good as Lambda in that frequency range I specified?

So, by retaining the 4 way design and only
use two 15" Lambda, I could drop in two JBL 2226H if
Lambda's are not available, but I would have to raise
the crossover to 100hz - 300hz (plus or minus)
and let the Tumult run low pass at 100hz.

What I mean by Lambda's not being available;

In the future one of my Lambda's get destroyed, ie,
kids playing in the house and damaged it, the dog
ate one, I blew one up, etc. What would I do for a
drop in replacement? yikes.

Does this make any sense or should I lay off the booze?

 

[Jack Gilvey]

That's what I thought.
Sounds like a fun plan!