Hi,
I would like to know how to insert a DSP device between the streamer and the DAC of the Rose150b,
That is, the signal from the streamer would go to the DSP and then return to the DAC of the 150.
Thanks
You can’t. But there is enough you can do with the internal dsp. The RS only lets you choose a digital or analog (ie dac) output. And only 1 input at a time.
You can if you use an external dac.
the idea is insert a Dirac processing tu room correction.
Thnaks
Any electronic room processing is very limited in usefullness. You cannot ‘fix’ a room with it, nor can it ‘fix’ badly behaving speaker drivers.
If you want to fix your room, treat the room with well placed acoustic treatment or carpets etc. Position your speakers better.
To fix your speakers, change the crossover or get better ones.
I have studied acoustics, done years of PA and make my own speakers. DSP can’t fix stored energy or wave cancellation. What DSP you can do with the Rose streamer for tuning your system is more than enough.
Thanks for your support.
I have done an analysis of the room response and my problem is that I have an atomic bomb around 80hz and an abyssal depression around 250hz
How can I make a correction exactly at these frequencies with the Rose150?
thanks
I
80Hz is probably a standing wave floor ceiling and a low ceiling 7ft, 2m15. That frequency will also reverberate much longer.
The other frequency will be a cancellation. So no matter how many Watts you pump in, it will cancel out. +3000W + -3000W has the same effect as +10 -10W. Only the adverse effects of 3000W right next to the problem frequency will probably be much worse and blow up your speakers.
Materials to dampen these frequencies will have to be really heavy and thick. So just draperies won’t work. Bookshelves with books or records might help. But then again, that’s probably not the reason you have this problem. It’s speaker placement.
A very good trick to get your speakers (subwoofer) in the best position is put the speaker in your seating position and move around the room where it sound best. So reverse positioning of listener and speaker. So you need to find 2 spots, preferably symmetrical to the final listening position. So put the speaker in your chair and find two good spots, and that’s where your speakers go.
Never place your speakers too close to the wall, or even worse; in the corner. Put them on ear height, tweeter on ear height if you can.
And don’t listen in an almost empty room.
Thanks for the info.
I have a living room that is 6.5m x 3.2m, that is, rectangular. On the left half there is a dining table, 4 chairs and a shelf, and on the other half there is the sofa and in front of it the equipment…with the speakers almost attached to the wall. There is no option to move them away from the wall, because then I eat them directly, and I can’t change the table either. I don’t have any more shelves and there are no rugs.
I have the speakers that I have, they are in the position that I have no other option, 63kg of weight each one is not easy to move, they reach quite deep bass, I don’t have a subwoofer and with all this the listening is totally unsatisfactory.
What can I do?
That’s rather small for such big speakers. I have a friend who had the same sort of problem. Speakers on the long side close to the wall, couch on the other side, his head almost to the other wall. And a wife with strong convictions… Repositioning the speakers slightly did help an awful lot. Sitting back on the couch was unlistenable.
I also have big speakers, Genesis VI, about the same weight. I placed them on transport rollers. Get some. Just for small repositioning makes it a hell of a lot easier. Or move them out a bit while listening. Spikes are overrated. Your speakers are so heavy, they won’t move pushing air.
Symmetry and close to the wall are your enemies. If your speakers are f.e. 20cm from the wall you get 4x more energy in the bass, for your ears, close to the wall also 2x. That’s a huge 10dB peak. Changing one 20cm forward changes the frequency slightly so they don’t double up as much.
Also a thick carpet can help a lot. And room treatment behind your head on the wall could help. But it needs to be thick and heavy to absorb 80Hz. Or calculated bass traps (Helmholz resonators). Those things need to be calculated to work. Those foam ‘egg racks’ won’t help. Neither will corner bass traps.
Moving things around will help without costing anything. Try to let go of fixed ideas (it "has* to stand there!). You can always move it back.