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Old 13th May 2004, 04:48 PM   #1
krishu is offline krishu  Europe
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Default diy speaker project nearly finished (pics)

Hi,

i almost finished my diy floorstander;

it is described more in detail on my website http://www.krishu.de > hifi > speakers

The speaker is based on a kit offered by http://www.dynamik-akustik.de

It uses Eton ER4 Air Motion Transformers and two 7" Eton woofers. Crossover is tuned to about 2kHz, each woofer has about 16 liters volume and the reflex ports are tuned to about 40 Hz.

He woodwork consists of 22mm thick MDF, the front is 44mm; everything is veneered with european cherry tree and waxed.

Sensitivy is about 95 dB; Size is about 1.10m high and just more than 20 cm wide.

The crossover sits in a separate chamber which was planned to be filled with sand but the speakers are so heavy now I will probably not do this.

Any comments and suggestions are welcome.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Cheers
Christian
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Old 14th May 2004, 07:04 AM   #2
dvdwmth is offline dvdwmth  Canada
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Those look great!

I like the way you visually integrated the drivers with the black strip. The angled corners are nice and the finish is beautiful. What was the wax you used? I really like the subdued finish you get with wax.

Nice site too.
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Old 14th May 2004, 09:47 AM   #3
krishu is offline krishu  Europe
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Hi,

since I am a student of industrial design I learned how to make things look better than they are

I used "Antique Wax Oil", ordinary stuff from any home diy store.

Cheers
Christian.
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Old 14th May 2004, 11:14 AM   #4
Bricolo is offline Bricolo  France
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Quote:
Originally posted by krishu
since I am a student of industrial design I learned how to make things look better than they are
I thought that only students in politics were learning this
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Old 14th May 2004, 11:49 AM   #5
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Is that what they are learning at the ENA?
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Old 14th May 2004, 11:52 AM   #6
krishu is offline krishu  Europe
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What is ENA?
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Old 14th May 2004, 11:56 AM   #7
Bricolo is offline Bricolo  France
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One of the (if not the) best french school of politics
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Old 14th May 2004, 11:57 AM   #8
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Default Re: diy speaker project nearly finished (pics)

Quote:
Originally posted by krishu


Sensitivy is about 95 dB; Size is about 1.10m high and just more than 20 cm wide.

Hmm seems like there cannot be any bafflestep compensation added in to this design if its a 95dB speaker.

Assuming you measured these drivers with Just MLS did you actually use the bafflestep thingymabob in the merge combine thingy when you add the near and farfield responses of the woofer together??
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Old 14th May 2004, 12:03 PM   #9
krishu is offline krishu  Europe
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Hi,

I did not measure anything, I just listened and have simulation diagrams.

As said above, this is based on a kit, I just modified the housing and the quality of the x-over parts, mainly capacitors.

The bafflestep i hope has been be taken into account by the developers.

Cheers
Christian.
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Old 14th May 2004, 12:06 PM   #10
Gregm is offline Gregm  Europe
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Lovely looking speakers! Also look expensive.
How'd you manage 95db, I thought those woofs were in their mid 80's?

Quote:
Originally posted by capslock
Is that what they are learning at the ENA?
Not quite. They teach you how to talk OTHERS into believing how things are . "Who cares what things really LOOK like to you, I'll convince how they really are."
Good school, actually (IMO, etc). Cheers
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