Saurav
Senior HTF Member
- Joined
- Feb 15, 2001
- Messages
- 2,174
Actually, what is realistically do-able? I know this depends on an enormous number of factors, so let's simplify a few things right away - no EQ, no BFD, no room treatments or bass traps. "Normal" sized room, 15'x20'x12', normal furniture. In my case, the sub is a DIY - NHT 1259 in a roughly 3'x2'x2' sealed enclosure, completely stuffed (or looks like it, I took the driver off today to check, I didn't buyld this).
I'm sure the ultimate goal is +/- 3dB or better, but is that achievable just with position/crossover/phase? I built my crossover, so I can play with cutoff frequency, slope, and so on.
Anyway, I've been playing around with the sub's position and orientation (thinking maybe it might excite a room mode more if it fired down that room direction), and I've got it to a point where I can go from 200 Hz down to 30 Hz (I don't register anything at 20 Hz, but that's not really an issue, as this is for music only) without having to switch ranges on my RS meter, so that's a +/- 5dB, I guess. There are still some sharp swings within 10 Hz increments, so I'll experiment some more, but I would just like to get some feel for this from people who've done this much more than I have.
A couple more questions:
* The bass is totally different at different points in my room. Can I do anything about this without room treatments?
* Upper floor apartment, springy wooden floor, all wooden construction. Would more bass get transmitted to the neighbors through the structure, or the air? Should I spike the sub to the carpet, or would that just increase the amount of bass being sent to the guy downstairs? I would think that it would. Spikes on a granite slab, or anything like that? Any other suggestions? I haven't had any complaints yet, but any general advice on how to keep as much bass inside my room as possible would be most appreciated.
Thanks,
Saurav
I'm sure the ultimate goal is +/- 3dB or better, but is that achievable just with position/crossover/phase? I built my crossover, so I can play with cutoff frequency, slope, and so on.
Anyway, I've been playing around with the sub's position and orientation (thinking maybe it might excite a room mode more if it fired down that room direction), and I've got it to a point where I can go from 200 Hz down to 30 Hz (I don't register anything at 20 Hz, but that's not really an issue, as this is for music only) without having to switch ranges on my RS meter, so that's a +/- 5dB, I guess. There are still some sharp swings within 10 Hz increments, so I'll experiment some more, but I would just like to get some feel for this from people who've done this much more than I have.
A couple more questions:
* The bass is totally different at different points in my room. Can I do anything about this without room treatments?
* Upper floor apartment, springy wooden floor, all wooden construction. Would more bass get transmitted to the neighbors through the structure, or the air? Should I spike the sub to the carpet, or would that just increase the amount of bass being sent to the guy downstairs? I would think that it would. Spikes on a granite slab, or anything like that? Any other suggestions? I haven't had any complaints yet, but any general advice on how to keep as much bass inside my room as possible would be most appreciated.
Thanks,
Saurav