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Multi-Way Conventional loudspeakers with crossovers

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Old 15th April 2011, 12:58 PM   #821
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Sorry about that. Fat finger on the submit reply

ALUMINUM WAVEGUIDES

I received a few emails while I was figuring out the details but please email again if you want a pair and I will keep track of things now.

The price is based on min 10 for CNC and paint.
Have 2 comitments now. Thank's Ben and Matt from Alberta.


Sincerly, Joel
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Old 15th April 2011, 01:45 PM   #822
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Quote:
Do the waveguides exactly match the mounting plate of the tweeter and does it have matching holes so that the WG and the tweeter are mounted with the 4 screws?
If so, that would be great.

How are the WG's finished? Are they black anodised?
The Waveguide is wider than the tweeter mounting plate.

The holes in the WG are halfway between the outer perimeter edge of the bottom recess and the outer perimeter of the WG.

The supplied wood screws are from Solen and designed for Diy speaker projects. They look like machine screws and have an alan head and recess perfectly in the holes.

The WG will screw into the sub front panel with new pilot holes. Screws go 18mm below WG.

Black Powder Coat

Hope this helps, Joel
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Old 15th April 2011, 04:08 PM   #823
ABO is offline ABO  Netherlands
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Quote:
Originally Posted by tinitus View Post
btw, for the big ones I can really recommend toroids
can't do without those
Arent the coils supposed to be air cores?
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Old 16th April 2011, 12:56 PM   #824
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Talking with the CNC guy. He's keen on making a Hardwood Waveguide.

Going to take him a couple of round 1 inch pieces of Walnut. Probably only good for from scratch build. Dont know if it could crack later?

This was my initial Attraction.. See what happens..

Joel
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Old 16th April 2011, 01:22 PM   #825
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Quote:
Originally Posted by ABO View Post
Arent the coils supposed to be air cores?
The largest inductor I use 2 x 9mH in series, these do not have to be air cored, but the rest should be.

Cheers, Joe R.
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Old 16th April 2011, 02:15 PM   #826
ABO is offline ABO  Netherlands
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Joe,

Thanks for the reply. Perhaps you are willing to answer another question. It seems that half of the crossover really does not do any filtering. These parts seem to merely act as a load for the power amp. I am of course referring to strings L4-R2-C3, L5-R3-C4 and 10R-0,68u.
I have seen this before as optional for tube amps, but never before as standard part of the crossover.

Would you recommend using them for a high power, high feeback solid state amp? I am asking because these parts seem to contribute to the cost of the crossover significantly. Thst is not a problem per se, but I wouldn't want to waste my money.

Thanks, Lex
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Old 16th April 2011, 02:24 PM   #827
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Hi Lex

Just trust me, there are things happening here that are not obvious. Truth be told, I have been told not say too much.

Like I said a few messages back, just build them and enjoy them. I doubt if you will regret it.

Cheers, Joe R.
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Old 16th April 2011, 10:51 PM   #828
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WAVEGUIDE FILLER

What about using the existing felt and cut out the hole for the WG?
Use both pieces, one for back fill(or wood strips) to keep it flush

Tried it quickly with some left over. looks pretty good but imagine it with nice felt, veneered cabinet and accurate trimming..


Joel
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Old 16th April 2011, 11:19 PM   #829
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by ABO View Post
These parts seem to merely act as a load for the power amp. I am of course referring to strings L4-R2-C3, L5-R3-C4 and 10R-0,68u.

I have seen this before as optional for tube amps, but never before as standard part of the crossover.
KEF used conjugate through many years

I'm not suggesting this is just that

looks like one is dealing with driver/box ressonance
and the other, well....?
might be 'killing' anything it 'sees' above the series inductor in front of it, maybe
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Old 17th April 2011, 12:49 AM   #830
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Good try... but no.

KEF used conjugate for a different reason. And if you look at the conjugate alone... that is simply a distraction.

I really can't say too much at this stage. If I may speak cryptically, think noise... and no, I don't think you will guess it. It is very left field - but audibly very obvious.

We know that at least one very high-end designer (very to extremely expensive speakers) who is aware of this, but he is clearly using a different approach to the same subject. So there may be other ways of dealing with it. He won't say, we won't say.

Just build it and enjoy it.

Cheers, Joe
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