roy allison's findings

[jayman67]

ive just been reading his findings here http://www.classicspeakerpages.net/libr ... ious-photo

i dont pretend to understand it all but find it very interesting reading.

[Simon Hickie]

Yes indeed, good paper. Figure 16 on page 7 was close to what became the Allison One speaker. This kind of thinking as promoted by DBH has transformed my own understanding of loudspeakers and their environment. I knew room acoustics were important before, but the idea of speakers working with the room rather than against it was something of a 'light bulb' moment. In fact, the more I think about it, the more I wonder why the market is so dominated by 'traditional' designs. The industry does seem incredibly conservative in the speaker department.

[SteveTheShadow]

The industry does seem incredibly conservative in the speaker department.

It starts at an early age. Ask a kid to draw a train and most of them will draw a steam engine. Ask them to draw a speaker and it certainly won't be an semi-omni.

[Dr Bunsen Honeydew]

Allison - A man before his time

[CN211276]

After being blown away by the Cube 3s I have been pondering why "traditional" designs dominate. I think it could partly because more power is required when a driver is pointed at the ceiling to achieve a given volume. Also, point and squirt might come over more impressive at a dealer.

After advertising my previous speakers on PFM I received a PM enquiring as to what I replaced them with. If I had not replied by PM I'm sure it would have been deleted. Word is getting round.

[karatestu]

After being blown away by the Cube 3s I have been pondering why "traditional" designs dominate. I think it could partly because more power is required when a driver is pointed at the ceiling to achieve a given volume. Also, point and squirt might come over more impressive at a dealer.

After advertising my previous speakers on PFM I received a PM enquiring as to what I replaced them with. If I had not replied by PM I'm sure it would have been deleted. Word is getting round.

Well my home made / doc mod 3 way (as cube 3 plus 12" woofer) are a revelation for me. They sound MASSIVE and are easily driven to loud levels with a 25W AP20 which has only a 100VA transformer. I do have the volume pot around further than when using point & squirt but not much further. I think the ap20 was getting hotter when driving a doc modded pair of MS902S (point & squirt).

Sheep follow sheep and marketing . I do hope semi Omni becomes more popular, its where its at baby. Shahinian speakers seem quite popular on PFM but I think they are fully Omni directional.

[Simon Hickie]

Perhaps it's because they sound good (I'm yet to experience it myself & rely on others on this forum) at a modest price point, meaning that there's less room for product differentiation amongst manufacturers or for very expensive speakers with relatively low value components.

[Ithilstone]

karatestu - Even better as AP20 has only 80VA transformer (unless your one is special;] )

[karatestu]

Nothing special about mine. I just wrote what i read on the ebay listing. Maybe i read the wrong one ?

[Ithilstone]

from eBay

NVA AP20 Specifications:

Power Output - 25w per channel

Power Supply - 80va

You just made me check it again as I also have AP20 ;] and was quoting 80VA from memory