Large in-wall speakers

Haven’t seen almost any in-wall or soffit mounted speakers here. Mostly in-wall speakers are called architectural speakers and intrests are mostly to just get some sound to room.

Have been thinking idea like soffit mounted heavyweight studiomonitors but DIY versions. Inwall has some stregths like much less diffration and no front wall boundaries.

Something like 12”/15” coax with 18” bass was in my mind.

Any ideas to this kind of setup?
 

rayma

Member
2011-04-29 8:37 pm
Can work well, but use mockups first to determine the best height and lateral locations. For something that large,
you'd want no attachment to the wall, rather an isolated shelf behind the wall for it to sit on.
 
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mayhem13

Member
2008-09-22 4:37 am
Depends on your purpose........for general listening and home theater, the design principles are shifting towards MMTMM and WMTMW in walls.......you still get control over directivity this way

Critical listening monitors don’t take this into account as the control/mastering rooms are designed specifically and treated as such. As an engineer with over 30 years practical experience, I wouldn’t go this route for home enjoyment. Even the newest mastering rooms are moving towards WMTMW systems

If the main listening position is in a 15 degree vertical window, use a ribbon crossed high between a pair of wide band midranges......it’ll sound like you did $10k worth of room treatments and the acoustic height of the recording will be more present.

The COax system will beam critical mids and highs exposing every flaw and become quite fatiguing fairly quickly.....all while bass runs amok moding in every corner.
 
Depends on your purpose........for general listening and home theater, the design principles are shifting towards MMTMM and WMTMW in walls.......you still get control over directivity this way

Good point! Purpose is mainly for music but also sometimes used for movies, 70/30 music/movies.

Critical listening monitors don’t take this into account as the control/mastering rooms are designed specifically and treated as such. As an engineer with over 30 years practical experience, I wouldn’t go this route for home enjoyment. Even the newest mastering rooms are moving towards WMTMW systems

40-60m2 large living room. Acoustic ceiling, thick mat in floor plus some diffusers and absorbers in walls but nothing like in mastering room.

If the main listening position is in a 15 degree vertical window, use a ribbon crossed high between a pair of wide band midranges......it’ll sound like you did $10k worth of room treatments and the acoustic height of the recording will be more present.

You think that WMTMW is the way to go in that kind of acoustics because you get better vertical directivity?

The COax system will beam critical mids and highs exposing every flaw and become quite fatiguing fairly quickly.....all while bass runs amok moding in every corner.

Have heard several 12” and 15” coaxial floorstanders but haven’t noticed that kind of fatiguing.
 
John Sayers forum has lots of topics on soffit mounting. John Sayers' Recording Studio Design Forum •

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It is hard work to do such a structure and thus expensive, that's why there isn't many hobbyists doing it :) Also, if the speakers are at wrong position, speakers not as good as hoped etc. the whole thing requires a rebuild.

Have fun!:)

Need to take a look that site also even i’m not intrested mastering studio but there could be some construction ideas.

check out this guys stuff, he is member here
My Unity Horn Speakers

Thanks! Liked idea how that speaker is constructed. It is like large speaker cabinet next to wall.
 

mayhem13

Member
2008-09-22 4:37 am
Good point! Purpose is mainly for music but also sometimes used for movies, 70/30 music/movies.



40-60m2 large living room. Acoustic ceiling, thick mat in floor plus some diffusers and absorbers in walls but nothing like in mastering room.



You think that WMTMW is the way to go in that kind of acoustics because you get better vertical directivity?


Have heard several 12” and 15” coaxial floorstanders but haven’t noticed that kind of fatiguing.

Improved directivity overall....particularly towards the ceiling and floor where diffusion is difficult and absorption kills the height information. Bass performance in a WMTMW is far improved as well.......more long wave reflections and collisions on multiple planes produce a more even bass response.....logorithmically speaking of course.

How can a 15” coax not beam?......and the directivity collapses below the lowest frequency in respect to driver diameter. COax make GREAT monitors......but early reflections smear the soundstage.....you have to be in the nearfield to enjoy the advantages.
 
Improved directivity overall....particularly towards the ceiling and floor where diffusion is difficult and absorption kills the height information. Bass performance in a WMTMW is far improved as well.......more long wave reflections and collisions on multiple planes produce a more even bass response.....logorithmically speaking of course.

How can a 15” coax not beam?......and the directivity collapses below the lowest frequency in respect to driver diameter. COax make GREAT monitors......but early reflections smear the soundstage.....you have to be in the nearfield to enjoy the advantages.

Here is good example of 15” coax and 18” bass directivity. To me directivity looks actually quite good and wouldn’t judge as a nearfield monitor.

Taipuu_3-way_SPL.png

Taipuu_3-way_PowerDI.png

Taipuu_3-way_Directivity.png


In-wall or soffit mount will actually increase lower frequencies directivity.