Sub woofer video. Guy with question has Carver gear.

[Ar9Jim 6,514]

Some of these videos are pretty good. Hope you like. 

 

 

[UncleMeat 1,173]

When I added a single TSW signature to my Amazings, it improved the overall sound; but lost some of the stereo effect in the lows. It's output was very low but still I could hear a 'center channel' in the bass note. Dual TSW-signatures behind the amazings fixed that. Localizing the sub does not mean the sub is bad; it's just your own ability to locate the source at a given frequency (at the high end of the bass frequencies it delivers).

[Ar9Jim 6,514]

When I added a single TSW signature to my Amazings, it improved the overall sound; but lost some of the stereo effect in the lows. It's output was very low but still I could hear a 'center channel' in the bass note. Dual TSW-signatures behind the amazings fixed that. Localizing the sub does not mean the sub is bad; it's just your own ability to locate the source at a given frequency (at the high end of the bass frequencies it delivers).

Have been reading about that lately. Thats interesting Russ. Read that 2 subs make it easier to get good results. Sounds like you experienced that as well.

[UncleMeat 1,173]

Another issue with integration of a sub with your main speakers is phase and time alignment. Phase adjustment can only work to it's full ability if the sub is in fairly close proximity to the speaker (or a similar distance from the listener). If it's distance from listening position is too great (or too short), you might never be able to get the phase to sound correct because the basic timing will never be 'close enough'. If you don't have an active crossover that can time align the subwoofer, it would be best to place it at the same linear distance the speakers are from the listening position (so centered, but along an arc drawn from the distance of the L/R woofers to the listener).

 

[zumbini 6,150]

 

 

 

When I added a single TSW signature to my Amazings, it improved the overall sound; but lost some of the stereo effect in the lows. It's output was very low but still I could hear a 'center channel' in the bass note. Dual TSW-signatures behind the amazings fixed that. Localizing the sub does not mean the sub is bad; it's just your own ability to locate the source at a given frequency (at the high end of the bass frequencies it delivers).

Have been reading about that lately. Thats interesting Russ. Read that 2 subs make it easier to get good results. Sounds like you experienced that as well.

 

 

 

Another issue with integration of a sub with your main speakers is phase and time alignment. Phase adjustment can only work to it's full ability if the sub is in fairly close proximity to the speaker (or a similar distance from the listener). If it's distance from listening position is too great (or too short), you might never be able to get the phase to sound correct because the basic timing will never be 'close enough'. If you don't have an active crossover that can time align the subwoofer, it would be best to place it at the same linear distance the speakers are from the listening position (so centered, but along an arc drawn from the distance of the L/R woofers to the listener).

 

Hmmm. Dual subs, in close proximity to mains. Works for me too!

 

[schultdw 393]

The wavelengths at subwoofer frequencies are so long that you have quite a bit of wiggle room. If on the other hand you have a woofer rather than a subwoofer (crossover greater than about 100Hz although some would argue for 40Hz) then it gets harder. That is what you typically see in subwoofer/satellite and and home theatre box set systems.

 

I have never noticed any problems with the ~60Hz crossover frequency I use. But maybe I just don't have the required golden ears.

[Ar9Jim 6,514]

The wavelengths at subwoofer frequencies are so long that you have quite a bit of wiggle room. If on the other hand you have a woofer rather than a subwoofer (crossover greater than about 100Hz although some would argue for 40Hz) then it gets harder. That is what you typically see in subwoofer/satellite and and home theatre box set systems.

I have never noticed any problems with the ~60Hz crossover frequency I use. But maybe I just don't have the required golden ears.

Thanks for sharing. That aligns with what I have read.

 

I heard a M&K sub/sat system in the 90s and the M&K (as a system) sounded good. The man in the video didn't like it with his speakers but personally I liked M&K system I had heard.

[UncleMeat 1,173]

If you start playing with active crossover and time delays you will find that the sound of your speakers (and the sound of reproduced music in general) can be greatly different than what you are used to hearing, by correcting for time alignment. When a band plays, everything is in time alignment with the underlying tempo. If the drummer's kick drum is off or a base guitar is playing out of time, it doesn't sound right, and mis-timing of lows is exaggerated compared to other instruments. The same happens if the woofers or subwoofer is out of time alignment with the mids/highs. You might not notice it in general, but when you hear it 'correct' it's easy to spot when it's not in time on a different system.  Yes, wavelengths of low notes are long, but timing/phase of the initial impulse event must match between drivers.

 

With digital crossover I time delayed my ribbons on my Amazings relative to the woofers which are a bit further away in measured distance to the listening position. The delay puts the two in time alignment; now the playback is in unison again, as was recorded. BillD did this for another member's system (Reese IIRC). If it were not for BillD and his knowledge and sharing of information, I would not have known that such an improvement could be made relative to such a small adjustment to timing.