Mark Audio Alpair 10 MLTL Design - Page 3

Jim Griffin · 17th February 2009, 02:25 AM

For comparison I have a photo of the 'Jordan with a Ribbon' MLTL, the Alpair 6 MLTL, and the Alpair 10 MLTL prototypes. the Jordan design was built a few years ago while the Alpairs are new ones as reported in this forum.

Jim

_henry_ · 17th February 2009, 08:14 AM

how does the alpair 6 perform?

im very curious for them, still havent decided either alpair 6 or 5

_henry_ · 17th February 2009, 08:17 AM

The Jordan's cabinet looks very very nice.

do u have any plan to combine the Alpair 10 Bass with Alpair 5 or 6 ?

_henry_ · 17th February 2009, 09:51 AM

is it still possible to put alpair 5 and make the sealed enclosure for them without changin the dimension?

i try to make some drawings, i hope it can be clear

mikadosan · 17th February 2009, 02:44 PM

Jim: Isn´t that port a bit small? Have you found out any port noise?

How much you think the changes of the driver height from the floor will affect the tonal balance of the finished speaker?

Nice work indeed anyway...

Cheers

-Mika

mikadosan · 17th February 2009, 02:44 PM

Quote:

Originally posted by _henry_
is it still possible to put alpair 5 and make the sealed enclosure for them without changin the dimension?

i try to make some drawings, i hope it can be clear

For me the drivers seems to be too far away from each other then... But this is of course only my opinion then...

_henry_ · 17th February 2009, 02:48 PM

the reason i did this, to have less effect on the T- Lines, which i can be wrong

other consideration since we need separate enclosure, its just for practical purposes to build the cabinet, which this partition create +- 1L

any suggestions are very well welcome

_henry_ · 17th February 2009, 02:51 PM

rev 1 with outer dimension

Jim Griffin · 17th February 2009, 03:06 PM

Thanks to all for the nice comments.

On Henry's drawing I'll agree that the two drivers need to be closer together for a better blend of the sound. Another idea would be to place the Alpair 6 (or maybe A5) in a open tube that on the back of the cabinet. It would be interesting as either a small sealed box or open back 'tweeter'. You have freedom on the crossover point between drivers to 'size' the enclosure for the A6 so that it would be less intrusive into the pipe for the A10.
One might choose to crossover high enough so that the baffle step compensation is achieved solely with the A10. This may also tend to reduce the volume needed for the A6.

On the port tube size: It is same diameter (2.06") as I used in my Jordan MLTL. I haven't heard any port noise from the recent A10 design nor from the Jordan design for years. I always check the port velocity during the design simulations. Not a worry in my mind.

Jim

Henkjan · 17th February 2009, 05:32 PM

nice looking speakers Jim

Quote:

Originally posted by Jim Griffin
...... the Alpair 6 MLTL....

is that the same as presented by Scottmoose in this topic http://www.diyaudio.com/forums/showt...73#post1711973

edit: probably not, in scottmoose's design the driver is much more towards the top of the line

edit2: I should look at the new threads first, before asking

it's here

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17th February 2009, 08:14 AM	#22
_henry_ diyAudio Member Join Date: Jun 2002 Location: Indonesia	how does the alpair 6 perform? im very curious for them, still havent decided either alpair 6 or 5

17th February 2009, 08:17 AM	#23
_henry_ diyAudio Member Join Date: Jun 2002 Location: Indonesia	The Jordan's cabinet looks very very nice. do u have any plan to combine the Alpair 10 Bass with Alpair 5 or 6 ?

17th February 2009, 02:44 PM	#25
mikadosan diyAudio Member Join Date: Oct 2004	Jim: Isn´t that port a bit small? Have you found out any port noise? How much you think the changes of the driver height from the floor will affect the tonal balance of the finished speaker? Nice work indeed anyway... Cheers -Mika

17th February 2009, 02:48 PM	#27
_henry_ diyAudio Member Join Date: Jun 2002 Location: Indonesia	the reason i did this, to have less effect on the T- Lines, which i can be wrong other consideration since we need separate enclosure, its just for practical purposes to build the cabinet, which this partition create +- 1L any suggestions are very well welcome

17th February 2009, 03:06 PM	#29
Jim Griffin diyAudio Member Join Date: Jun 2003 Location: Tennessee	Thanks to all for the nice comments. On Henry's drawing I'll agree that the two drivers need to be closer together for a better blend of the sound. Another idea would be to place the Alpair 6 (or maybe A5) in a open tube that on the back of the cabinet. It would be interesting as either a small sealed box or open back 'tweeter'. You have freedom on the crossover point between drivers to 'size' the enclosure for the A6 so that it would be less intrusive into the pipe for the A10. One might choose to crossover high enough so that the baffle step compensation is achieved solely with the A10. This may also tend to reduce the volume needed for the A6. On the port tube size: It is same diameter (2.06") as I used in my Jordan MLTL. I haven't heard any port noise from the recent A10 design nor from the Jordan design for years. I always check the port velocity during the design simulations. Not a worry in my mind. Jim

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