Interesting thread, following along and I really dig what you're doing. So continued good luck.
Originally Posted by Martycool007
Do you think that this in-wall version of the Seos speakers will sound as good as the regular standard version? The reason that I ask is because I
have never heard an in-wall speaker that sounded as good as a comparable standard speaker in a conventional box. I have always wondered why
there seems to be so much of a disparity between conventional speakers and in-wall speakers when it comes to sound quality. The last in-walls that
I heard were the Klipsch Ultra-2 THX in-walls.
Very astute observation, and a significant issue.
A well executed flush mounted speaker addresses several of the many acoustic distortion issues associated with loudspeaker reproduction. Proper
flush mounting lessens the negative effects of diffraction, it entirely eliminates the reflection and negative interaction (SBIR) of the wall behind the speakers. Also, we're all familiar with the half space mounting performance gains, with up to several dB of boost to the lower freqs.
What's important is one achieves the positive attributes, without incurring the potential negative issues that all too often accompany flush mounted systems in homes. Any discontinuity of the baffle wall can create measurable artifacts in the acoustic facsimile that is the soundstage, or reproduced image of the recorded event. Also, any diffraction issues that do arise from the small baffle wall deviations anywhere around the drivers not only affect imaging, but they can degrade the transient response too.
Waveguides for pattern control, flush mounted drivers, precise transitions for smooth surfaces .... all create fewer diffraction sources, and are all positive steps toward minimizing the wavelaunch adulteration that impacts the acoustic reconstruction of the image occurring prior to the energy reaching the LP.
Psycho-acoustically, it's amazing how well we hear past
many of these acoustic distortions. However, clearly there a gains to be had in lessening each of the above issues, and striving for the most ideal environment for playback of the recorded event. Anything less than a loudspeaker radiating into free space can easily encounter the minefield of acoustic distortions that plague the loudspeaker/room interface. Thus, when plunging into the flush mounted realm, one really benefits from being mindful of the inherent issues.In brief review
, the benefits of flush mounting are;
1.) diffraction issues are lessened
2.) any potential cancellation between the speakers and the front wall is minimized
3.) the lower freqs are more efficiently matched to the space
So examining those three, clearly one can see the key would be the proper execution of the flush mounting, without compromising edge diffraction.
The other benefits are essentially a can't miss proposition, but key benefits nonetheless. Actually, they're enormous benefits, as boundary interference easily creates significant destructive dips in response, and merely achieving a 3dB rise in system sensitivity is equally as exciting.
Add it all together and perhaps most importantly include the manner in which waveguide/pattern control launches the wave toward the LP ... thus eliminating both edge diffraction artifacts (FR, and transient response), and "SBIR" boundary interference issues (again both freq and time domain). Unfortunately the effects only populate the range within the passband, but we can't have everything.
Clearly, one can see the importance of the lowest possible cut out freq for horn loading.Here
is a tremendous pdf of a SynAudCon paper by Pat Brown. The entire paper is superb in it's simplicity. Empirical data, with clear explanations for implementing such data. The data toward the bottom is fascinating. We all are aware of edge diffraction, but Pat illustrates it's significant impact from around 300-3k,... a huge component of the measurement.
For those not familiar, SynAudCon is the finest organization of it's kind. It was founded by the incomparable Don Davis, with his wife Carolyn. It's since been turned over to Pat Brown, the author of the pdf paper. Their work in sound reproduction should be studied by all.http://www.synaudcon.com/site/
Within the site, is a collective of ref articles and education focused on acoustics, electronics, sound, and sound systems of all sizes.(Fwiw; My wife and I bought out first home with an eye on the ideal shoebox proportioned listening room. A very modest home at $29k During our first year there, I installed inwalls, we enjoyed both the visual aesthetic, and the half space efficiency that came with the mounting. Dual 6.5", 2.5 way, w/soft dome) .. yeah, $29K