a blog about my? photography, loudspeaker design and other stuff I bump into

Monthly Archives: May 2011

Timber…

Local DIY shop called that they already had cut all MDF. Took out the hacksaw to cut the tapered bottom and top panel and to create the braces and a few hours later I could lay some MDF on to each other to make the photo below:

Mailorder…

Sooner then expected…

Loudspeaker #3…

Made a template for the curved panels. The old fashion way. Cut it from some leftover matboard.

 With a steady hand, a sharp knife and good light it’s quite easy to cut the curves.

Friday I’ll visit a local shop to get all MDF. And in a few weeks it might look something like this:

Loudspeaker #2…

After some reading, and some more reading and calculations I changed the midwoofer to the W18EX001 and the tweeter back to the Visaton KE25C I was looking at before.

That calls for a somewhat bigger cabinet. The cabinet roughly measures (h*d*w): 39cm*32cm and the width tapers from 21cm to 12,5cm.

While drawing and calculating the needed volume I chopped the curved back and made it flat. This is also easier to build.

The plyMDF is only 9mm, too have some rigidity 2 layers are needed at minimum and a brace in the middle of the cabinet. Maybe, to be decided while building, I might add a 3 layer.

The x-over will not be placed in the cabinet, it will be external. Wires will be run through the pedestal.

LOUD!!speaker…

One of my many areas of interests: I always wanted to build speakers myself, after a first (failed) attempt in the 80′ties of the previous century I never pursued  it.  With the internet a lot more data and knowledge is accessible that was not 30 years ago. I’ve been doing a lot of reading on the subject and I think I’m near to start the construction. It’s paramount that a measuring system is needed, but no longer you need to buy expensive stuff: a PC with a decent soundcard and a calibrated mic get’s you there too.

I’ts hard too tell how big it really is, so I used some scrap carton to make a very rough mockup:

Speakers will be Seas, Midwoofer: W15CY001 and 27TFFC as tweeter. Passive x-over filter, 3rd order, 2,2Khz with a notch filter to filter out the cone breakup of the W15 around 8 to 9Khz. There is little more to tell about it, drivers are well known and also often used in commercial designs. BR tuned at 39Hz. With the measurement hardware in place some filter tweaking will be done.

 

Lyngdorf…

I’ve bought the Lyngdorf, sadly I had bad luck and something was wrong. After the weekend the amplifier will be replaced with a new one. The distributor will come to my place to swap the amplifier. About a week ago I also listened to speakers in a Hifi shop, out of curiosity, to see ifContinue Reading

Spring…

Vouwere, April 2011