Dave,
How does the SQ/performance of the push-push sub compare to a servo controlled sub like the Rythmik?
Ray
How does the SQ/performance of the push-push sub compare to a servo controlled sub like the Rythmik?
Ray
Ray Collins said:
Never heard a servo sub... but they are attempting different goals. I have little doubt that a push-push servo-sub would be better than a single driver one... besides the basic benefits of push-push i suspect that the amount of correction required by the servo would decrease cleaning that aspect up as well.
dave
Ray Collins said:
I wouldn't say that... as with any feedback system, the right way to do it is get as good a piece of kit as possible before looping the feedback since the less feedback/correction you actually have to use the better -- you get a system that has greater stability and fewer artifacts.
dave
When you do a push-push system you just double the box size, do you double the port also, either a single port that is twice the size recomended for a single driver or two ports the same as recomended for single driver?
I have tried push pull with my previous subs - AE speakers AV12. I put drivers on opposite sides of the box, one with magnet facing out and polarity reversed. What I noticed:
1. Less cabinet vibration compared to just one driver
2. Slightly tighter sound
Push pull gives a subtle improvement and back to back allows a box that isn't as thick and heavy.
Then I got Rythmik Direct Servo. Comparing just one to my previous sub was a big improvement, much bigger than what you get from merely using back to back and/or push pull. If you want the best of both then go with Rythmik dual kit, which has two 12" drivers and you can then go push pull as well. I suggest a prototype so you can decide if you think the improvement is worth having the magnet pointing out in one sub.
If you really want the best that you can possibly get, then this is what I'd do. Get the Rythmik dual kit and horn load it! I would be doing that myself, except that I found out the horn I had in mind is just too big and will kill the room.
1. Less cabinet vibration compared to just one driver
2. Slightly tighter sound
Push pull gives a subtle improvement and back to back allows a box that isn't as thick and heavy.
Then I got Rythmik Direct Servo. Comparing just one to my previous sub was a big improvement, much bigger than what you get from merely using back to back and/or push pull. If you want the best of both then go with Rythmik dual kit, which has two 12" drivers and you can then go push pull as well. I suggest a prototype so you can decide if you think the improvement is worth having the magnet pointing out in one sub.
If you really want the best that you can possibly get, then this is what I'd do. Get the Rythmik dual kit and horn load it! I would be doing that myself, except that I found out the horn I had in mind is just too big and will kill the room.
What about a Rythmik dual kit mounted back to back in a push-push configuration like Dave favors?
Ray
Ray
Martin Logan use 3 drivers 'push push push ?' in their Descent sub. My friend has one of these in a fairly small room and the sound quality is excellent.
Maybe try 3 x Rythmik audio servo 12's to make a bigger version?
http://ultimateavmag.com/subwoofers/107/
Rob.
Maybe try 3 x Rythmik audio servo 12's to make a bigger version?
http://ultimateavmag.com/subwoofers/107/
Rob.
RobWells said:
They don't take it as far as they could, relying on the baffles to tie the drivers together.
dave
Thats a shame - I kind of assumed there was some serious bracing inside to lock the 3 magnets together.
Oh well, once more a point to team DIY 😀
Still one of the best subs I've heard though.( for music at least )
Rob.
Oh well, once more a point to team DIY 😀
Still one of the best subs I've heard though.( for music at least )
Rob.
Thats a hard question to answer Paul.😀
My friends system is dipole - Martin logan ESL's, All driven by Krell stuff. It's a wonderful sounding system. I'd have to hear the sub in my system to do a fair comparison. I however feel no need to get rid of my labs. And of course if you want to watch a film at reference...
Obviously my system lacks the very low stuff now(It's only flat to 20hz atm) But I'm working on a soution for that bit. Space gets to be a problem with horns and living room sized listening rooms
Rob.
My friends system is dipole - Martin logan ESL's, All driven by Krell stuff. It's a wonderful sounding system. I'd have to hear the sub in my system to do a fair comparison. I however feel no need to get rid of my labs. And of course if you want to watch a film at reference...
Obviously my system lacks the very low stuff now(It's only flat to 20hz atm) But I'm working on a soution for that bit. Space gets to be a problem with horns and living room sized listening rooms
Rob.
ONLY 20 Hz? That's a bit wimpy isn't it?!
I wonder if a tapped horn could be a good way to get down lower. I hope to get around to doing one soon with the aim of getting a little lower than 20 Hz, say 15 Hz.
I wonder if a tapped horn could be a good way to get down lower. I hope to get around to doing one soon with the aim of getting a little lower than 20 Hz, say 15 Hz.
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