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DIY Waveguide loudspeaker kit

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#822
gedlee said:


Waveguides should always be countersunk. It would be bad design to use a nice smooth outer radius and then leave the edge in a step.
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Yes, of course. My point was not that they should be countersunk. My point was that they needed putty and sanding after they had been countersunk, since the edge were a bit rough.

🙂
 
#827
Hi Ludvig_S, you are not reachable...

Ludvig_S said:
I just want to write a note about three 15" wavguides that were delivered from Gedlee today.

They are actually bigger than 15". More like 17". The visual finish is not high enough to mount them untreated in a speaker, but that was not what I had expected either. They need to be countersinked into the baffle, and need some putty and sanding since the edges of the waveguide are a bit rugged and not completely regular. But after doing this, they should be just fine estethically.

The mounting plates are drilled with very high precision. The throat transition waveguide<->mountingplate<->compressiondriver makes a smooth, perfect fit. The foamplugs also fits very well into the waveguides and has a nice exterior roundover.

All in all I'm very satisfied with the mechanical design and finish of this product.
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I am very curious!

Would you mind contacting me Ludvig as you are not allowing anyone to contact you? I could have written this in swedish but that would have been impolite.

//Per
 
#828
Re: Hi Ludvig_S, you are not reachable...

phi said:


I am very curious!

Would you mind contacting me Ludvig as you are not allowing anyone to contact you? I could have written this in swedish but that would have been impolite.

//Per
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Hi Per,

since I have registered here very recently, I'm under moderation and that seem to block the possibility to contact or be contacted by other members.

Please contact me on www.streamingaudio.se
 
#829
Demo pair

Gedlee,
Does someone have the demo pair of Nathans you were sending out?

If so, it would be helpful and interesting for anyone listening to the demo pair to write in about their experience. Any pros or cons, what kind of speaker do they normally listen to, type of equipment, and type of music.

Thanks.
Tom
 
#830
The demo set took some time to get painted. Paint is such a pain. I finally broke down and bought a pro painting setup to see if I can get rid of the problems that I keep having.

They should go out this week, or early next.

But I can't force people to post. A lot of people just won't - you have to have a thick skin! The reality is that these forums don't really allow for dissent unless one is ready to take abuse. Fairness and respect are in short supply.
 
#833
I remember seeing that wave guide while browsing through some sites, don't recall any data was published, otherwise I would have taken notes. I do recall the guide is cast aluminum with some ribs to break up some modes. The add claimed that FEA of structural modes were conducted to determine the locations of the ribs.
 
#837
Its hardly an octave. If 54 Hz is the -6 dB (as it is usually spec'd) point then its more like 1/3 octave or less. The Abbey goes a lot lower than the Nathan.

LF extension is matter of choice and my philosophy is not to bother. The Abbey could easily be modified to reach 54 Hz with porting, but, to me, that would be the wrong thing to do. You have to pick your target, you can't design for multiple subs and not multiple subs, something won't be optimum.
 
#839
gedlee said:
Its hardly an octave. If 54 Hz is the -6 dB (as it is usually spec'd) point then its more like 1/3 octave or less. The Abbey goes a lot lower than the Nathan.

LF extension is matter of choice and my philosophy is not to bother. The Abbey could easily be modified to reach 54 Hz with porting, but, to me, that would be the wrong thing to do. You have to pick your target, you can't design for multiple subs and not multiple subs, something won't be optimum.
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I do have difficulty understanding how "random" placing of multiple subs can be optimum. Some designers think that placing multiple subs to excite as many modes as possible, which is a point of view I can understand; but a non-technical based approach as "random" just means "wherever you put them it will work regardless" is just something that cannot be technically explained.
 
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