Hi
Drivers are a Audiotechnology for mids and bass. The tweeter is from RAAL.
You are correct, the design is active with ten channels of amplification, digital crossovers and room correction.
Drivers are a Audiotechnology for mids and bass. The tweeter is from RAAL.
You are correct, the design is active with ten channels of amplification, digital crossovers and room correction.
ShinOBIWAN said:
Can you provide some details on which models of drivers and crossover settings?
soundengine355 said:
The bass drivers are a tailored specification built to incorporate TS parameters that suited my application so those don't have a model number. The mids are a similar story too.
The tweeter is the 140-15d from RAAL.
Going into the crossover details would take some time, there's information scattered throughout this thread but a nice introduction would be this post:
http://www.diyaudio.com/forums/showthread.php?postid=1438851#post1438851
I can quickly say its a 3.5way design with 200hz, 600hz and 2500hz as the crossover points using 2nd order Linkwitz/Riley filters.
You changed to an IIR setup, or are you just using a 12db Q=.5 target? 2nd order targets are pretty shallow to bother with a FIR crossover.
On a side, note I played with high order FIR crossover targets (96db) as well, and found I like conventional (12,18 and 24db) targets better.
With a 24db target I could not tell the difference between my IIR and FIR setups.
All targets are acoustic
What are you finally using for amplification and DAC. You seem to keep changing those?
When is the perceive v10 comming out?
On a side, note I played with high order FIR crossover targets (96db) as well, and found I like conventional (12,18 and 24db) targets better.
With a 24db target I could not tell the difference between my IIR and FIR setups.
All targets are acoustic
What are you finally using for amplification and DAC. You seem to keep changing those?
When is the perceive v10 comming out?
mbutzkies said:
FIR allows more accurate time domain correction without significantly affecting frequency response. That's why even with 2nd order I stick with FIR.
I actually have two identical sets of filters, one FIR and the other is IIR derived from the FIR with some minor delay tweaks to get a good pulse response. FIR is noticeably superior in my setup, its not night and day but its an improvement none the less and I'm all for that. I do use the IIR filters for situations that demand real time processing ie. gaming. Everything else such as music and movies goes through the FIR.
Amplification is Aussieamps NX-LSP400SE, DAC's are courtesy of a Lynx Aurora 16. A very nice sounding setup.
Perceive 10 has already been done, just doing the crossover and write up.
mbutzkies said:
The last time I listened to an SKA was Nov 07. Memory is much too fuzzy to say anything concrete so bear that in mind. But from what I remember the two aren't a millions miles apart. I like both but the NX400 has appeals that go beyond sound such as DC protection, mute on power off and balanced input.
Anyone know where I can reasonably priced quality toroids in the UK?
I used to buy from Farnell but its been awhile now and their prices have gone through the roof.
I used to buy from Farnell but its been awhile now and their prices have gone through the roof.
Have you tried Rapid or Airlink? (manfacturer)
To be honest I think with the price of copper and steel skyrocketing this year, the basic raw material cost is going up and its being reflected in the supplier's pricing.
-Len
To be honest I think with the price of copper and steel skyrocketing this year, the basic raw material cost is going up and its being reflected in the supplier's pricing.
-Len
I'll check those two out Len, thankyou.
I didn't realise that material costs were to blame for the rise. Fingers crossed I can find something more reasonable than £85inc vat for a 1000VA toroid.
I didn't realise that material costs were to blame for the rise. Fingers crossed I can find something more reasonable than £85inc vat for a 1000VA toroid.
I just checked Rapid and it looks like they're doing end-column pricing again today.. £49.50 for a 1KVA toroid, but it says 'for account holders only'.. They still have 500 and 625VA available for us grubby diy-ers.
-Len.
-Len.
stryker1959 said:
😀
Yes but to be honest any speaker I place in there suffers the same brutality caused by the room.
Big speakers are a sign that you've arrived, no one took me seriously before 😀
markus76 said:
Everyone would agree with that but no room, even the multi million dollar studios are perfect. So given that nothing is perfect, DRC is yet another tool to aid the engineer or listener. You have to weigh up whether the distortion your adding cancels enough of the distortion that's already taking place in the room for it to be worthwhile. Often it is.
DRC isn't something to be scared of. In the next 10 or so years I expect that it will get the recognition and adoption it deserves outside of professional circles where its largely confined right now.
I can't help but feel your looking at it from an idealistic perspective. Most rooms and my room in particular couldn't be further from ideal.
In the real world what you suggest isn't entirely optimal. Its a lot better than nothing but you need to look at the problems to realise there's other problems that need to be addressed aside from the ever present bass issue.
From all I've read about acoustics in small rooms is that treatment's are best handled with broadband absorption not just bass traps. Your speakers and your ears are close to walls and this causes comb filtering or interference between the reflected waves and unreflected waves. The only effective measures for this is diffusion and/or absorption.
Another point is treating first reflections. Bass traps won't do anything for these.
What I'm saying is that in any regular room and particularly a small one, you need some absorption of the mids and highs as well as the bass.
If you've got a minute I highly recommend watching this video covering comb filtering, what causes it and examples of its effects.
http://www.realtraps.com/video_comb.wmv
Markus, I was talking about spot treatment for reflectivity not a wholesale application of this to all treated area. You mentioned the window on the right of the room causing an uneven tonal balance and I said I could deploy a measured amount of reflectivity on the left wall to balance the symmetry of the room.
A member on here named Thylantyr(name=terrorizer in the link) posted a long and not entirely factual dissection of my more recent DIY exploits.
Its a riveting read so enjoy 🙂
http://www.createforum.com/petereur...days=0&postorder=asc&start=0&mforum=petereuro
Its a riveting read so enjoy 🙂
http://www.createforum.com/petereur...days=0&postorder=asc&start=0&mforum=petereuro
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