Almost done futzing with my 846a Valencia's

[jimreeves]

The enclosure shape reminds me of the Stonehenge. I have no idea how the bass slot should work?

 

[Tom Brennan]

I have no idea how the bass slot should work?

By narrowing the source of the sound it widens the dispersion.

 

[Fran604g]

I wonder how a 416 or Duplex would do in a big BBC style thin wall cabinet and mounted behind a slot to increase dispersion. If nothing else it would be lighter and cheaper. ;-)

LS5/1 - Graham Audio - British manufacturers of high quality loudspeaker systems

Graham Audio - UK manufacturers of high quality loudspeakers, including the BBC-licensed LS5/8 and LS5/9

www.grahamaudio.co.uk

View attachment 82399

Interesting thought. I've read Karlson's aren't great with a Duplex (in fact terrible, fwiw), although obviously the "slot" is of a very, very different construction.

 

[asilker]

By narrowing the source of the sound it widens the dispersion.

Hey Tom, I spend a few minutes (maybe not enough) looking for other resources to learn about this phenomenon. I know you have significant investment into this sort of thing -- would you be able to point me in a direction to learn more about narrow sources and dispersion?

I'm currently fooling around with VOTT cabinets so to some degree this concept directly applies to me at the present time

 

[Tom Brennan]

@asilker

Harry Olson was an engineering kahuna at RCA and knew damned near everything. His book "Acoustical Engineering" can be read for free on Google Play and other online sources. Read the section on loudspeakers.

 

[jimreeves]

Lots of discussion of these slots here...

Slotted Baffles? (i.e. Graham Audio)

Curious about the use of slotted baffle driver loading to control (widen) dispersion of large drivers in the mid frequencies, allowing otherwise impossible horizontal matching with tweeters. Graham Audio famously use the technique originally popularised by the BBC monitor era...

www.audiosciencereview.com

 

[asilker]

@asilker

Harry Olson was an engineering kahuna at RCA and knew damned near everything. His book "Acoustical Engineering" can be read for free on Google Play and other online sources. Read the section on loudspeakers.

Found. Thank you!

Lots of discussion of these slots here...

Slotted Baffles? (i.e. Graham Audio)

Curious about the use of slotted baffle driver loading to control (widen) dispersion of large drivers in the mid frequencies, allowing otherwise impossible horizontal matching with tweeters. Graham Audio famously use the technique originally popularised by the BBC monitor era...

www.audiosciencereview.com

Thanks sir. Will review soon.