Hi guys,
I've been spending a lot of time reading and playing with WinISD but I need some pointers before I can really go any further.
My setup is quite basic/modest I guess, in my lounge I have a htpc with soundcard going to a 2ch gainclone amp. This feeds some some two way floorstander speakers, 6" woofers, 36L transmission line design, rated about 90db and down to about 35Hz +/- 2db. Use is probably 50% regular tv, 30% movies, 20% music.
I have always been quite happy with the bass output but have occasionally thought about adding a sub to fill in the lower frequencies, I expect it would help with music a little and add quite a bit to movies.
So far I've mostly been modelling along the lines of a single 12in DA DCS305-4 with the DA SPA250DSP although I'm starting to lean towards the Reference RSS315HF-4. I'm thinking of the DSP plate amp as I figure it will be useful as I don't have a receiver so it will let me do things like EQ the sub and highpass the floorstanders. Does this make sense and is it a worthwhile consideration?
I don't have much experience with subs and hooking them up, if I decided to build a second identical sub is that still possible to hook everything up correctly with this amp. I'm guessing the RCA cable would be split into each sub and then the HF out from one sub would go to the 2ch amp for the floorstanders?
This amp's subsonic filter has a minimum at 25Hz vs the normal 250W plate amp at 20Hz. When I'm modelling and add these filters the 25Hz has a much more marked effect on the frequency graph leading me to think it is much less desirable. Is this a significant concern?
When modelling should I be aiming for the flat frequency response first and then add the subsonic filter and leave it at that? I've noticed with the filter applied I can then play further with the box size and tuning frequency to return the graph to a more flat response, is this the right way to go?
Along similar lines I experimented with some EQ to improve the graph although this can cause issues with excursion and air velocity but is this still a worthwhile method to tune things while modelling and before building the box?
This is probably enough questions for now, I appreciate any help and answers to my questions. I guess some general advice regarding my setup would also be useful, my original thinking was having floorstanders I could potentially lowpass a single sub relatively low avoiding localisation issues while placing it out of sight behind the seating position. However maybe highpassing the floorstanders would be beneficial allowing the sub to take on more work, I see many people often recommend multiple subs so maybe a couple smaller 10" could work better.
Anyway sorry if this has turned into a wall of text and as I say any help is greatly appreciated.
I've been spending a lot of time reading and playing with WinISD but I need some pointers before I can really go any further.
My setup is quite basic/modest I guess, in my lounge I have a htpc with soundcard going to a 2ch gainclone amp. This feeds some some two way floorstander speakers, 6" woofers, 36L transmission line design, rated about 90db and down to about 35Hz +/- 2db. Use is probably 50% regular tv, 30% movies, 20% music.
I have always been quite happy with the bass output but have occasionally thought about adding a sub to fill in the lower frequencies, I expect it would help with music a little and add quite a bit to movies.
So far I've mostly been modelling along the lines of a single 12in DA DCS305-4 with the DA SPA250DSP although I'm starting to lean towards the Reference RSS315HF-4. I'm thinking of the DSP plate amp as I figure it will be useful as I don't have a receiver so it will let me do things like EQ the sub and highpass the floorstanders. Does this make sense and is it a worthwhile consideration?
I don't have much experience with subs and hooking them up, if I decided to build a second identical sub is that still possible to hook everything up correctly with this amp. I'm guessing the RCA cable would be split into each sub and then the HF out from one sub would go to the 2ch amp for the floorstanders?
This amp's subsonic filter has a minimum at 25Hz vs the normal 250W plate amp at 20Hz. When I'm modelling and add these filters the 25Hz has a much more marked effect on the frequency graph leading me to think it is much less desirable. Is this a significant concern?
When modelling should I be aiming for the flat frequency response first and then add the subsonic filter and leave it at that? I've noticed with the filter applied I can then play further with the box size and tuning frequency to return the graph to a more flat response, is this the right way to go?
Along similar lines I experimented with some EQ to improve the graph although this can cause issues with excursion and air velocity but is this still a worthwhile method to tune things while modelling and before building the box?
This is probably enough questions for now, I appreciate any help and answers to my questions. I guess some general advice regarding my setup would also be useful, my original thinking was having floorstanders I could potentially lowpass a single sub relatively low avoiding localisation issues while placing it out of sight behind the seating position. However maybe highpassing the floorstanders would be beneficial allowing the sub to take on more work, I see many people often recommend multiple subs so maybe a couple smaller 10" could work better.
Anyway sorry if this has turned into a wall of text and as I say any help is greatly appreciated.
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