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Multi-Way Conventional loudspeakers with crossovers

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Old 28th January 2009, 04:00 PM   #71
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally posted by marchel
Hi,

Do you have an XO design yet? any pix of the XO design?

The design is premature 1st oct this sounds the best and cost less, less is better. Keep it simple.

Because this design is about high-end quality for a budget price.
The chosen drivers have high power rating so they can endure less steep filters. They also will have less power compression distortion due the good cooled voice coil.

I do first order filter because we can use MKP capacitors (polypropylene).
High qaulity coils R=0,2 Ohm that's what it is all about.

High = 5uF MKP and mid =0,236mH and 160uF MKP

Click the image to open in full size.

Low 2,65mH , <0,2 Ohm
Click the image to open in full size.

Maybe a coil will be added to protect the tweeter.
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Old 1st February 2009, 01:48 PM   #72
Helmuth is offline Helmuth  Netherlands
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The grey frame of the WTP138 doesn't fit good with the colour of the hole speaker. So I decided to paint it black.

Click the image to open in full size.

Don't they look great the titanium polypropylene cone drivers. They also have a immense power reserve. They are 70W rms each so 140W in the application. This means low power compression en 1 octave filtering without a problem.
This is also the case for the sub how can consume 200W rms.

Click the image to open in full size.
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Old 1st February 2009, 02:01 PM   #73
Salas is offline Salas  Greece
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The assortment of your choices is very nice considering value for money. Will you use own measurements on given boxes to make the crossovers?
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Old 1st February 2009, 03:27 PM   #74
Helmuth is offline Helmuth  Netherlands
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Quote:
The assortment of your choices is very nice considering value for money. Will you use own measurements on given boxes to make the crossovers?
Hi Salas,

I hope I get my Hobbybox V6 running I got problems with the software of the soundblaster sound cart.

I do not see any problems for the cross over. For the high pas of the midrange a impedance correction coil of 10mH will be added to straiten the impedance raising around Fo. So no 2 octave
May be a RC combination to keep the impedance above the 4khz around 4 Ohm so the 1 octave filter will do its job right.

The tweeter will probably also get a coil to prevent the distortion of the tweeter below 2kHz. I have to test that if it is not necessary it will be skipped.

The woofer I have listened on my tube amp sounded very good dynamics and dry. And that for a bassreflex on the tube amplifier. I never had build a bassreflex for myself because of the poor damping but that was a faulty estimation of me I know now.

I also respect good dynamics of the midrange due the big radiating area. And the soft dome horn speaks for it self.
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Old 1st February 2009, 03:51 PM   #75
Helmuth is offline Helmuth  Netherlands
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For the sub a high quality coil will be used r<0,2Ohm 2,7mH.
Click the image to open in full size.

A flatwire AWG14 coil is used for midrange lowpass r<0,12Ohm.

Click the image to open in full size.

For highpass of the mid range Claritycap APW MKP capacitors will be used.
Click the image to open in full size.

So low R high Q coils and MKP capacitors the best components IMO.
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Old 1st February 2009, 04:25 PM   #76
tinitus is offline tinitus  Europe
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Looks good Helmuth

These are very good midrange coils fore 3ways, and cost effective, 0.56mH cost 18EUR
Attached Images
File Type: jpg coils-07-intro.jpg (25.4 KB, 807 views)
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Old 1st February 2009, 04:28 PM   #77
Helmuth is offline Helmuth  Netherlands
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My measuring gear.

Click the image to open in full size.

Behringer omnidirectional mic.
24bit sound cart
monacor phantom power supply microphone amp.
And HBX 6V software.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
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Old 1st February 2009, 04:34 PM   #78
Helmuth is offline Helmuth  Netherlands
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Quote:
Originally posted by tinitus
Looks good Helmuth

These are very good midrange coils fore 3ways, and cost effective, 0.56mH cost 18EUR

Then I got a tip for you tinitus,

Flatwire for 19,30 EURO.

caps and coils

Regards Helmuth
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Old 1st February 2009, 05:26 PM   #79
tinitus is offline tinitus  Europe
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Quote:
Originally posted by Helmuth
[B]


Then I got a tip for you tinitus,

Flatwire for 19,30 EURO.

/B]

Thanks, good tip

but I dont like all the plastic involved and besides I question the "loose" winding of foil inductors

"baked" threaded air coils seems to me as the best, and sounds better too and yes, I have tried expencive Wax/paper Jensen
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Old 1st February 2009, 08:31 PM   #80
Helmuth is offline Helmuth  Netherlands
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I just discovered Boxsim. It takes the baffle in the simulation.

I do not fully understand the program. I had to reduce the level of the midranges because the simulation calculated with 2Watt at hat to be 1 Watt.

And hat to choose a similar tweeter because I don't know al the details of the mivoc.

Note :bassreflexpipe gain isn't shown IMO.

Looks nice flat
Click the image to open in full size.
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