Mark Audio CHR-70 Application Thread

[planet10]

Originally Posted by AlanElsdon

One of the problems I have found with mounting the Alpair10s and would seem to be a problem with the CHR70s is the lack of material into which to bolt the drive units - this is a problem especially with MDF.

As well as being addressed by an aluminum subbaffle (something we will try eventually (drivers mounted from rear), you can also do as per the suggestion in the EL70 dimensions document.

You could also just avoid MDF. Another discussion on that subject.

dave

[AlanElsdon]

Originally Posted by planet10

As well as being addressed by an aluminum subbaffle (something we will try eventually (drivers mounted from rear), you can also do as per the suggestion in the EL70 dimensions document.

You could also just avoid MDF. Another discussion on that subject.

dave

The Jaguars are the first speakers I have built using MDF (and probably the last). I like the idea in the first link - obvious when you see it!

Since the Jaguars are already made I will modify them for the ally sub-baffle, but for the Maeshowes I will revert to birch-ply and use the indentation method advised.

Thanks

Alan

[planet10]

Originally Posted by AlanElsdon

but for the Maeshowes

We have Maeshowe at the veneer stage. Aesthetics are awesome.

dave

[AlanElsdon]

Originally Posted by planet10

We have Maeshowe at the veneer stage. Aesthetics are awesome.

dave

I have just found someone in the same town as me who makes and supplies veneers so hopefully this weekend I will having a look at what he has - and learn how to veneer - my first attempts were awful - so I will proctice on the left over MDF!!

[human.bin]

AlanElsdon any pic of the jaguars? also some more listening impressions? i will eventualy start the construction this summer, i got the driver many many months ago but then been to busy with work to to the wood thing...

[AlanElsdon]

Originally Posted by human.bin

AlanElsdon any pic of the jaguars? also some more listening impressions? i will eventualy start the construction this summer, i got the driver many many months ago but then been to busy with work to to the wood thing...

No photos at this moment - but I will get the camera out now and take some - pleae note that thay are nude i.e. bare MDF.

The sound? Well initially I would compare to nails on a blackboard! I think that everyone should have a small soundproof room where new bits of kit can be placed to be run in - and only them listened to!

A week in I have to say that I am liking them more and more - the top-end could be a bit brighter (but not much), the mid-band is begining to open up and sound very promising. The bottom end is, at the moment, a little over-blown - again not much - but I have not yet tried any damping in the vents. I cannot compare them directly to my main speakers (Gedlee Abbeys) as they are being stripped prior to either painting or veneering, but in a month or two I should be able to do so.

I have just realised that this is some-way off topic so I will send you the photos and later comparisons and not post here.

[chrisb]

Originally Posted by planet10

We have Maeshowe at the veneer stage. Aesthetics are awesome.

dave

progress on these has been slightly delayed due a minor back injury (mine) and scheduling conflict with CNC for production of elliptical MDF supra-baffles for 4 pairs of drivers with which we want to experiment in these boxes

but they certainly are cute even at this stage

[italynstylion]

^I can confirm how much of a delay not having the CNC for making elliptical baffles would be. I've been working on a larger set for a few weeks now trying to get them right. It's not easy doing it by hand!

[italynstylion]

Oh, and I've been delinquent on posting pictures of my results...no more

(excuse the camera phone quality please)

On their own.


At home with their brothers.



Sound from these is quite good but response depends largely on the room I believe. It was my sisters' birthday this month so I decided that after I built and tested them I'd give them to her. Listening in my larger room yielded very smooth sound with extremely limited bottom end. However, in my sisters' smaller room these were exceptional.

[pytha2008]

Hi,

I have almost finished some of Henkjan's Black Beauty with Markaudio CHR 70 in copper.

I build it from flooring panels [MDF with 2.5mm Solid Black Walnut]
works great. The front will be 25mm Solid Black Walnut]
The Backside is black MDF.

Klaus


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