MCM 8" in a Tuba HT??

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infrasound
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MCM 8" in a Tuba HT??

#1 Post by infrasound » Sat Mar 04, 2017 6:06 am

This may have been asked before but despite a google search I didn't see any candidates.

Would the MCM 8" driver as used in the Autotuba/TableTuba also be capable of being used in the Tuba HT? Assuming I want the deeper extension and didn't need maximum output (at least yet/perhaps using it temporarily until I can afford the right driver - since I was considering FOUR tuba HT's thats $600 of drivers plus more for 2kw of amp to take advantage of it - but if i've got the wood and planned to swap out later it would be a stopgap) would it be an alternative?

Alternately the 10" driver (suggested for AT/TT) would that have the right parameters to be used in the meanwhile? (with the intention to upgrade to LAB12's in the future)

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Bill Fitzmaurice
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Re: MCM 8" in a Tuba HT??

#2 Post by Bill Fitzmaurice » Sat Mar 04, 2017 8:52 am

The THT is as large as it is to allow the use of 12 and 15 inch drivers. Smaller drivers will not work. As for 2kW of amp for four THTs, that's about 1.5kW more than you'd need.

Ryan Sober
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Re: MCM 8" in a Tuba HT??

#3 Post by Ryan Sober » Sat May 27, 2017 8:28 am

Sorry for the necropost, but my question kind of goes along with the OP.

Could a 20" wide THTLS be loaded with 4 8" drivers?

Specs:
Fs: 24.5Hz
Qts: .42
Vas: .84ft^3
Xmax: 13mm

The SD of a 15" and 4 8" is very close. It seems like it should work great, in theory.
What (if any) pitfalls am I missing?

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Bill Fitzmaurice
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Re: MCM 8" in a Tuba HT??

#4 Post by Bill Fitzmaurice » Sat May 27, 2017 9:10 am

It may work fine, but generally speaking four eights will cost more than one fifteen.

Ryan Sober
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Re: MCM 8" in a Tuba HT??

#5 Post by Ryan Sober » Sat May 27, 2017 9:41 am

Bill Fitzmaurice wrote:It may work fine, but generally speaking four eights will cost more than one fifteen.
That's great news... because I already have the eights!
I guess I'll just have to try it.
Will report back with findings when it's finished.

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Drey Chennells
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Re: MCM 8" in a Tuba HT??

#6 Post by Drey Chennells » Sat May 27, 2017 7:21 pm

Just a thought,
consider mounting all 4 drivers on a baffle outside of the cabinet, then slide it in and secure on top of the standard cabinet baffle built per plans..only difference being the cutouts to accommodate the eights.
I would do this to make mounting/sealing and any servicing much easier. I go as far as sealing the perimeter of driver gaskets with caulking and 4 drivers just compounds the process.
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Ryan Sober
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Re: MCM 8" in a Tuba HT??

#7 Post by Ryan Sober » Sun May 28, 2017 2:57 pm

Drey Chennells wrote:Just a thought,
consider mounting all 4 drivers on a baffle outside of the cabinet, then slide it in and secure on top of the standard cabinet baffle built per plans..only difference being the cutouts to accommodate the eights.
I would do this to make mounting/sealing and any servicing much easier. I go as far as sealing the perimeter of driver gaskets with caulking and 4 drivers just compounds the process.
You know, I was considering doing that already, if only so that I could load the cab with a good 15" speaker once the funds become available (if ever).

Your suggesting it just reinforces the validity of the idea.

Thanks!

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