Velodyne Digital Drive Series subwoofer in stereo

Dear Spacekadet: Velodyne: great choice nobody knows more about subwoofers that Velodyne people. I own two HGS-15, why two?: well not only because there are music information in the lef and right side of the recording signal but more important because those low bass ( left/right ) generate a lot of harmonics down and up the fundamental frecuency. So, if you have only one subwoofer you are missing a lot of music.

+++++ " except for a bump at 50Hz . " +++++

I can suggest that you can try other subwoofer position: side firing.

Now, the crossover point for the Totem's is very important ( critical ): which was your crossover point that you choose?

Regards and enjoy the music.
Raul.

Dear Spacekadet: Why I already say that you can loose music info. With a pair subs you have stereophonic sound reproduction that is exactly how its happen at the recording event.
Example, let's take a low drum that was recorded at left side of a music hall : if you have a dual mono subs ( left/right separates ) you will hear that drum at the left side on your audio system but if your subs are sum up ( left+right ) you will hear that drum at the center of your audio system.

Regards and enjoy the music.
Raul.

Dear Douglas: +++++ " . I believe I hear quite well the stereophonic effect of the low frequencies. " +++++

The stereophonic effect: I tottaly agree with you and that issue is all about the use of two sub's instead only one.

Regards and enjoy the music.
Raul.

Dear Spacekadet: I'm not against your advisors that convince you to one sub instead of your original and correct idea of two subs in a stereo fashion.

The integration of subwoofers in an audio system is not only for abetter low bass performance: far from this, please read these links about:

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&27&4#27

http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1117893153&openflup&31&4#31

Regards and enjoy the music.
Raul.

No question about Wc65mustang.

Regards and enjoy the music.
Raul.

Dear friends: THis is a very interesting link about the subwoofers number that we need.
This link was posted by Skushino on other thread. The conclusions are on the page 28, yes is a long history:

http://www.harman.com/wp/pdf/multsubs.pdf

Regards and enjoy the music.
Raul.

Dear Truthseeker: +++++ " This whole stereo sub thing is nonsense. Hardly any info there. Hardly heard. " +++++

I think that you have a misunderstood of what happen in a real stereo subs integration to any audio system:

First, we choose the crossover frecuency ( say, 80Hz ) in the high/low pass filters. What this means?
That the main speakers will handle frecuencies over 80Hz and that the subs handle below 80Hz.
Normally, the self electronic subs crossover is a second order design ( 12db per octave ), this means that the subwoofers will work with frecuencies as high like 200Hz and now in the whole subs frecuency range will be stereo information.

Second, the subs reproduce not only the fundamental frecuency but their harmonics too where we can heard the left right info.

Third,it is not totally true that the CD recordings has only mono low bass. One of the CD advantages is that there is no problems for to record left/right low bass frecuencies ( in the LP is different ) and that's what the CD industry is doing: taking advantage of the CD medium.

Fourth, when you attend to a classical music performance you can heard bass sound coming from the left /right side of the hall, example: bass drum to the left and double bass at the right and this is exactly what we heard/feel when we have two subs in a stereo way at home.

Dear friend, I respect your opinion and that was mine.

Regards and enjoy the music.
Raul.

Dear Truthseeker: My HGS-15 is 12db in the low pass and this fact makes a great difference in what you say.

Regards and enjoy the music.
Raul.

Dear Truthseeker: +++++ " . If you play a 30, 40, 50hz pure tone thru a low distortion sub (<10%THD), YOU WILL NOT BE ABLE TO TELL WHERE IT IS COMING FROM " +++++

I agree with you on those frecuencies.

Regards and enjoy the music.
Raul.