History question: Who made first deep bevels on speaker? Was it Genelec or Avalon or?...

[planet10]

Those are earlier ones with a differen bottom. I actually like th elooks better.

dave

 

[dagfinn]

Those pre-dated my B&W experience. This is the first notable one we had. DM-70.

View attachment 1276389

Very cool, like I would imagine an early Martin Logan. But does the rounded baffle improve anything? How did these sound? Released 1969, I found.
Some more here https://stereonomono.blogspot.com/2012/12/b-dm-70.html

 

[Juhazi]

I wish that someone would do dispersion measurements of these 80s "wide" speakers! The idea of widening with multiple drivers or line fights against unavoidable interferences...

Erin has measured Bose 901!
https://www.erinsaudiocorner.com/loudspeakers/bose_901_series_v/

 

[chrisb]

Thanks for that link Juhazi. The extensive measurements Erin posted were very interesting indeed - particularly the distortion, and his summary of subjective listening impressions. Definitely worth a quick scan, folks.

 

[planet10]

Yes, thanx for the link Juhazi. The scope of th emeasures gives a larger picture of the depth of Erin’s work. Now what they all mean…

Distortion is of interest. First time i have seen distortion measures hit the 25% Geddes suggests is needed for distortionj to actually be a factor in the sonics.

dave