|
Home | Forums | Rules | Articles | diyAudio Store | Blogs | Gallery | Wiki | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
Multi-Way Conventional loudspeakers with crossovers |
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
![]() |
|
Thread Tools | Search this Thread |
![]() |
#21 |
diyAudio Member
Join Date: Aug 2002
Location: UK
|
I'm assuming the OP was asking about having decent even coverage for the whole room for when lots of people are present...
I would find a surround receiver that has a 'party' setting where all speakers get the same signal, and run a six point one setup using 3 pairs of decent smaller bookshelf speakers. Instead of setting up the front 3 speakers as 'normal' I would just put all speakers quite high evenly around the walls. maybe 1 each end on the shorter walls and the other ones at 1/3 and 2/3 along the longer walls. I'd run a multiple small sub setup to give a more even bass response. If you wanted to you could get very directional horn tweeters to cover the individual zones and avoid some of the interference between speakers. Rob. |
![]() |
![]() |
#22 | ||
diyAudio Member
Join Date: Jun 2007
|
Quote:
Quote:
the ceiling in a typical living room is plain and reflective any stuff on the floor blocking or scattering the direct sound is actually good ps. one speaker for mono, two for stereo - anything more than that, forget about uniformity or coherence
__________________
"high phooey and hystereo" - Yascha Heifetz Last edited by graaf; 13th January 2018 at 10:22 AM. |
||
![]() |
![]() |
#23 |
diyAudio Member
|
You don't need to stick to mono. And imaging is an awkward term, which we all use whilst we try to define it. "They are here" "You are there" etc.
I would say that the Walsh 2s put an image in the air that is "they are here" with mono, and either with stereo, depending on the recording. The volume is fairly even throughout the room, unless you are on top of them. As you move about, the music seems to stay in the same place. If you look straight at the speakers, it's weird how you cannot place the sound as from the speakers. I really enjoy the Ohms, but I do not actually buy into the Walsh theory. Empirically, we know it works to keep us from putting our faces into the on-axis beam that occurs as the wavelengths shrink with increasing frequency, but the transmission mode model does not fly, as we know that if we simply avoid going too high, we can just point the cone concave up. All the fancy shapes(of the diffusers/whatchcallems) are just speaker porn, though beauty is not at all a bad thing, and some are very pretty. I have placed all sorts of small speakers on top of the cans, no effect on the sound or image till the box was much bigger than the can. Sound is not light, it is pure wave, it is diffracting right around. As to ceiling vs. floor placement, the first reflections are the most problematic, so flush in a ceiling;- in a box, listen to Graaf, clutter and softness are your friends. Another word about imaging. As a notorious late adopter, I was buying my first cassette deck in 1978, from a reviewer who had a pair of Wilson 'gasbag' speakers(no idea of model) to test. He played a mono tape of a David Bromberg show. They were definitely there. These were conventional in the sense of being a wide baffle set on top of the pressurised-gas woofer boxes. The image was above and between the rather large speakers, which you could not place as the source. So after all this, what is my point? We are after a pleasing illusion, of which there are various sorts, made in all sorts of ways. You should try at least a handful of ways in a problem room, borrow, mock up, don't buy or finish-build until you have, and you can be happy for a long time when you are done. |
![]() |
![]() |
#24 |
diyAudio Member
Join Date: Jan 2011
Location: Willamette Valley
|
Have a look at the AR LST models
|
![]() |
![]() |
#25 |
diyAudio Member
|
The 'sweet spot' with stereo speakers happens because there exists an axis where you are equidistant from both left and right, so the mono content from each speaker is in phase. When the listener moves out of the sweet spot the mono content from the speakers becomes out of time/phase so you get nulls in the frequency response at the listening position. Our intuition is to move back into the sweet spot to get the flat frequency response.
I think the trick may just be to add more speakers so there are longer any sweet spots in the room - nulls and cancellation occur at every listening position. Arranging four speakers as L R L R would probably be a start. Room reflections function as 'virtual speakers' and will help the effect, so aiming speakers off-axis to the intended listening positions should help a lot. Speakers which are omni directional or at least have a wide beam will probably help also. Of course, this goes against everything you want for a stereo system with a defined 'image', so what you probably want are two separate speaker system/setups. Last edited by TMM; 14th January 2018 at 01:26 AM. |
![]() |
![]() |
#26 |
diyAudio Member
Join Date: Apr 2016
|
Thanks for the advice. The LxMini are still directional for the tweeters. Those Duevels look interesting. But, based on the LxMini's woofer being very omni without a spindle, I dont know that the woofer needs a spindle - and as boswald said, much of the sound will diffract anyway.
The Bose 601 look like they use multiple tweeters to spread the sound so some is direct and some bounces. The AR LST look like they need a big room. Ill go experiment with placing the LxMinis around the room and bouncing the tweeter sound. An impractical approach would be a wall of sound to simulate being far away from a point source. |
![]() |
![]() |
#27 |
diyAudio Member
Join Date: Jun 2007
|
You may like the result of placing them side-by-side with 90 degrees toe-out
__________________
"high phooey and hystereo" - Yascha Heifetz Last edited by graaf; 15th January 2018 at 05:40 PM. |
![]() |
![]() |
#28 |
diyAudio Member
|
The LXmini's 2" is 4pi through about half its usage, about 4k. A neighbor tried a 1/2" as a super for further omni range(he thought he wanted more extension also). All I know is they were gone when he sent the speakers to his daughter(lucky kid). I'll ask when he returns from his winter southern escape.
|
![]() |
![]() |
#29 | |
diyAudio Member
Join Date: Jun 2007
|
Quote:
__________________
"high phooey and hystereo" - Yascha Heifetz |
|
![]() |
![]() |
Thread Tools | Search this Thread |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Youth Room Sound Help | ivandezande | PA Systems | 23 | 11th November 2014 03:10 PM |
My sound room | trilbies | Everything Else | 0 | 18th April 2014 11:09 PM |
Listening Room for your Sound of Music | lineup | Everything Else | 2 | 17th August 2008 10:32 PM |
need suggestion for sound in empty room | space2000 | Solid State | 0 | 26th May 2008 04:09 AM |
I really need help with a DIY sound room. | Gemini | Multi-Way | 13 | 3rd February 2002 11:20 AM |
New To Site? | Need Help? |