Which wood for cabinet (?) and double check on driver selection.

[GK]

Hi Ho.

I’m about to splash out on the drivers for my first serious speaker build – a slim 90dB/1w floor standing 3.5-way WWMT tower.

My driver selection is as follows:

Tweeter (91dB)
http://www.soundlabsgroup.com.au/p/V...MHT+12+-+8+Ohm
Midrange (90dB)
http://www.soundlabsgroup.com.au/p/V...50+FFL+-+8+Ohm
Bass (90dB)
http://www.soundlabsgroup.com.au/p/V...+250+S+-+8+Ohm


Bass reflex box for the woofers (rear port) and crossover frequencies of 800Hz and ~5kHz.
I intend to implement a full 6dB of baffle step compensation by rolling of the bottom woofer.

As far as I can tell this driver selection will work well in the intended configuration, but I though I’d float the combination here in case I’ve missed something important.

As for the cabinet I can build it in MDF, ply or solid pine. My current preference is for MDF because it is cheap and very easy to work with.
However if there is a convincing case to be made for either Plywood or pine I could be persuaded.

I’m also looking for an affordable measurement microphone / frequency compensated preamp. Any suggestions?

Cheers,
Glen

[MJL21193]

Hi Glen,
You know you are making a big mistake and you really should go with an established design...





Those look like nice drivers. Higher price doesn't always equate with better sound though.
I see you want to cross higher than you should on the woofer. It's published response looks pretty ragged up there.
The plan is for a 2.5 way?

For box material I'd stay well clear of solid pine or any solid wood for that matter. Unless you have the skill to construct it to accommodate seasonal expansion, it's just asking for trouble.
IMO there is WAY too much emphasis put on material differences. Superior construction techniques will always negate any real or supposed differences. MDF would be fine.

[PB2]

Originally posted by MJL21193
Hi Glen,
You know you are making a big mistake and you really should go with an established design...





Those look like nice drivers. Higher price doesn't always equate with better sound though.
I see you want to cross higher than you should on the woofer. It's published response looks pretty ragged up there.
The plan is for a 2.5 way?

For box material I'd stay well clear of solid pine or any solid wood for that matter. Unless you have the skill to construct it to accommodate seasonal expansion, it's just asking for trouble.
IMO there is WAY too much emphasis put on material differences. Superior construction techniques will always negate any real or supposed differences. MDF would be fine.

You're joking or did you not really read the post? It's a 3.5 way, both woofers will be rolling off at 800 Hz - should not be a problem. I did not take a close look so I won't comment further. He won't learn anything going with a proven design.

Pete B.

[MJL21193]

Originally posted by PB2



You're joking

Wow Pete. Perceptive.

[Andy G]

so... all the major vocal fundementals will be delivered by the 10" bass drivers ?

[MJL21193]

Originally posted by MJL21193

I see you want to cross higher than you should on the woofer. It's published response looks pretty ragged up there.
The plan is for a 2.5 way?

All joking aside. I mistakenly typed a 2 instead of a 3.
I wouldn't go as high as 800Hz with that or any other 10", that's what an appropriate midrange is for.

[Andy G]

Originally posted by MJL21193
I wouldn't go as high as 800Hz with that or any other 10", that's what an appropriate midrange is for.

that's what I was sort of saying, wondering about etc

[MJL21193]

Andy!
You've changed your handle?
Brother of Kenny? Can you play sax? I love sax.

Maybe Glen has been reading Geddes. He takes a 12" or 15" right up to near 1k.

[Moondog55]

Hi Glen, just my 2 cents worth; it's a good driver but I tried a clone of it and just doesn't work with a woofer that big.

Soundlabs have some efficient 5 and 6 inch mid-bassfrom Visaton that IMO would work better.
That said I'm glad to see that you are going to do your own thing, it's the only way some of us learn anything

[Andy G]

Originally posted by MJL21193
Andy!
You've changed your handle?
Brother of Kenny? Can you play sax? I love sax.

Maybe Glen has been reading Geddes. He takes a 12" or 15" right up to near 1k.

I'm Andy G on every other forum.. Thought a bit of consistency was in order


not brother of Kenny, cannot play sax

I love s.x, too.

Earl is using PA drivers, and as far as I can see, is crossing to use the directivity of them.
The drivers he uses are more like a PA mid, and still do vocals quite well.. Normal HiFi bass drivers on the other hand ....