These effects I have not seen mentioned on this forum, but having moved system from a small 8X10 room with curtains etc. and a sweet, smooth sound. Now to a larger room 16X12 with carpet but no curtains, exactly the same system, now sounded harsh, screechy and unpleasant. Now with floor to ceiling curtains and 4X ‘skyline' diffusers it now sounds as sweet as ever with a pin point sound stage.
Hi John, my room is 14'6" x 12'6" , with solid concrete floor with breeze block & plaster walls, and one door , the floor has underlay and carpet ,the room lightly furnished. My system is positioned on the long wall under the window, i have spent many hours experimenting with speaker positioning and i think i have it sorted now. I seem to be lucky the room seems to be just on the warm side of neutral, with little flutter echo, the sound is 3 dimentional balanced with very deep extended bass. I use pmc transmission line speakers ( OB1 ) , transmission line speakers seem to interact with the room better than any type of speaker i have tried. I Have thought about room treatment and have seen some weird and wonderful contraptions but have tried none so far . how do the skyline diffusers work and what is their effect ?
All sounds excellent, like the speaker choice they look/sound like real outstanding pro gear, and for once not ‘monkey coffins’. I believe that the ‘skyline’ diffusers work by reflecting the sound in many different directions, therefore breaking up, say wall to wall reflections, one reason for ‘flutter echo’ As for their effect, I suppose similar to absorbers, as in reducing reflections, but not, as in reducing total SPL. Have to admit that they looked like some abstract 3D art to me, quite an attraction.
wow, they look great , how big are they and what is the cost per panel , are they easily available if so where from ? I would definitely like to try them out. All PMC speakers are tranmission lines , they mainly cater for professional recording studios and broadcast companys worldwide also alot of musicians, but in the last few years have started making domesticated versions, the omly real difference is better finish. ( see www.pmc-speakers.com )
I like the principal of your PMC speakers, question for you what model and what cost, have looked at the site but no prices mentioned, normally means 'megga'. On the diffusers , they are 590mm square, availaible from 'Acoustic GRG Products Ltd. www.rpgeurope.com and cost £50 each in natural, (off white), painted another £2.67 and delivery another £8, total cost for two with VAT etc. £133.17. Definately create a 'quiet' in the room, and make a huge 'acoustic' statement.
John...
PS I may not be all the way with you over cables but I am all the way with you on reproduction.
Had a look at the rpg site , very interesting the sky line diffusers seem the most appropriate to my room so i think i will buy a couple of the 4" panels and experiment with the best position, the 6" panels may be too deep , which do you use ? PMC speakers are not cheap they start at £675 for the db1+, £850 for tb2+, £1145 for gb1, £1695 for fb1+, £2700 for ob1, you can save on this by buying second hand. I bought my ob1's ex dem and saved £700. I have listened to all these models they are all exceptional, they can all be activated with add on power packs, flying mole digital amps or bryston conventional power packs, the main feature is they 'breathe' like no other speaker i have heard just like live music,they do not compress even at very high levels , they sound balanced and natural at all listening levels. I have not heard any of the larger models, but the list of customers on the web site says it all.
OK thanks for the reply, don't sound bad on price, my vintage Magnats were retail about £950 but again I got these ex demo at some £525. Would love the hear your system. As you probably know I am a devotee of class 'D' amps (not digital) and I see no reason to change, however I am in time intending to build a another version with vinyl preamp, VFD display and motorised remote volume control, preferably using commands from the Merantz remote for the DVD player. Back to the skylines, I am now using 4X 6in units on opposite wall to speakers, curtains to the left, and looking to find a 'block' picture for the right. Only yeserday I found that a 'block' type picture actually has space behind the canvas, and that could be filled with some absorbant 'stuff'
Pluto , thanks for the link it was very interesting ,it has shown me just how much work goes into the development of room acoustic modification . John, I am in the middle of decorating / refurbishment at the moment but my listening room is last on the list so if you wish to listen to my system you are welcome as long as you dont mind the mess!, i live about 10 minutes from juntion 30 of the m25 in south ockendon ,it may be a bit of a trek for you but if you have a spare day i can email my address to you. I have been looking at other web sites for acoustic diffusion panels, but the skylines seem the best option and cheaper too. The flying mole amp i mentioned is a class d using bi-phase fusion, which combines the power supply & amplifier section in one circuit, it allows a shorter signal path with fewer components and 85 % efficiency when power supply and amp circuit is measured together.
electrohead, checked out 'south Ockendon' not a million miles away so maybe after next week. I really have to get some work finished soon. Interested in the 'flying mole' amp, any links? There has been some interesting 'cable' discussions going on at 'Nordost Odin interconnect and speaker cable' thread, think you'll find it good read.
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