Mark Audio Alpair 10.3/A10p MLTL

Buttoned up my MLTL's last night finally. The cabinets are not finished, just a coat of Black truck bed liner on the front baffle. They made sound for the first time so I think I will leave as is and let them break in for awhile. In the mean time will consider how to finish them. I have Mahogany veneer I bought for them but have not decided if I will use it or not. I saw some really nice looking vinyl wrap in a carbon fibre pattern so am checking into that.

Also considering some support at the bottom to prevent them tipping over... I have a very active Grandson:)

Made a pair of Aluminium "outriggers" as one possibility and am also considering a plinth with a heavy tile with that will attach to the bottom of the speaker.

Also repainted Dr Jim's Alpair 6 MLTL. I had used a stone finish spray paint but it never seemed to adhere to the wood, plus it had some mould growing on it (I live in the Tropics, mould happens).

They got a rubberized truck undercoating which I am leaving for a week or two to dry.

Once to 10.3 MLTL is ready I will have a shootout, 10.3 vs 6.

The 10.3's will have a formidable opponent to beat in the 6's.
 
In terms of bass extension, no contest - even with FR drivers, there's no replacement for displacement. But the smaller drivers have some pluses in the HF department, which can certainly explain the popularity of S.A.W. / FASTs, whatever you wanna call a 2-way with XO below 500Hz. .
 
Today was the first opportunity to listen to the 10.3 MLTL and it certainly was not as painful as I have read described. I was using my old NAD CD player taking the signal via Optical output straight into a Nuforce DDA-120 which is a PWM amp. Clean clear sound, no glare or nasties.

At "break in" volume the Nuforce indicates 45 - 50 on the display, it depends on the disc as some are "hotter" than others but it really is low volume.

I'm pretty amazed after around 5 hours of Bach on repeat I listened again and it really sounds wonderful. Even at this low volume bass is present and accounted for and the delineation of the notes is great. Tone is great. I never appreciated how muddied for lack of a better term many of my previous attempts at speaker building have been.

I am looking forward to getting the speakers ready for real use. Hopefully before the end of the year and then the showdown begins ;)
 
Approximately 360 hours in so far. Plenty bass but more importantly and noticeable is the quality / tone of the bass. I'm not sure if its the MLTL design and how it functions (probably is) but the bass tone and notes take on the qualities you often listen for in the midrange, for me at least. IOW, that clarity and separation of frequencies in the midrange I hold so dear are there in the bass as well.

Will soon be time to compare with the "baby" Alpair 6 MLTL. I know the bass output goes to the 10.3 but the rest will have to be compared.

Will also compare to Cambridge Audio R50's with upgraded crossover - 10.3's will lose in the bass:D

Andrew
 
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Zd is crucial to killing the 1st unwanted ripple. Moving the driver typically means adding more damping and getting less bass reinforcement.

The standard fix for driver to low wrt the ear at sitting height is tilting the speaker back… 5° seems to work well. The speaker shown is a new Woden ML-Voigt.

Lancet-5-tiltback.png


dave
 
In my build I followed all the dimensions given by Jim, the only difference being I used the full 48" length of the mdf for the front back and sides. There is an internal bottom where the vent is placed. The speakers are lifted off the floor with casters.

I really liked the build and wish I hadn't made if for a friend! I found the driver position just right. :)

Is there an alternate driver position that is higher? I understand that this is crucial to the design but Dave mentioned that it would cause a bigger ripple.

Would this be solvable with further damping?

Post 57 looks like it is higher than specified.