NaO Note II RS

[dewardh]

Originally Posted by Elias

2 speaker stereo is dead

The problem with that is content:

Could you point me to a good multi-channel recording of “Figaro” with Cecilia Bartoli singing Cherubino?

[Melo theory]

He's not talking about multichannel, although his wording is off.
He is saying classic stereophonics is dead.
It's not dead, but it should be....in audiophile listening sessions
Edit: IMO

[Melo theory]

Anyway, we are way off topic. My apologies......I will bow out now.
And.....end scene

[Pallas]

Originally Posted by dewardh

The problem with that is content:

Could you point me to a good multi-channel recording of “Figaro” with Cecilia Bartoli singing Cherubino?

DPL2 does a great job of expanding 2-channel sources into multichannel.

Though not as well, admittedly, if one's center is not identical to the left and right.

[john k...]

Looked at tweeter polar response this morning. I looks as if the tweeter x-o could be reduced to 4.5K while maintaining -3dB at 45 degrees, -6dB at 60 degrees, consistent with dipole radiation.

Just a shout out here. I live in CT about 30 miles from the shoreline. I did not have any damage from the storm but I did lost power and cable until yesterday. So I am just catching up on the news from NY and NJ. I grew up in Philly, Pa and spent many, many days at the Jersey shores from Cape May in the south to Point Pleasant in the north. Most of that area has been devastated by Sandy, as has been much of the cost of CT. And of course, the news has focused on NY.

Please take a moment and realize that all this speaker stuff and the banter back and fourth really plays little roll in our lives. My thoughts and prayers are with all the people affected by this continuing disaster. It will take years to recover and these places and the lives of those who live there will never be the same.

[dewardh]

Originally Posted by john k...

Please take a moment and realize that all this speaker stuff and the banter back and fourth really plays little roll in our lives. My thoughts and prayers are with all the people affected by this continuing disaster. It will take years to recover and these places and the lives of those who live there will never be the same.

Exactly so, John, exactly so.

[john k...]

Originally Posted by a_tewinkel

I'm wondering, the slight bump off-axis, around 2 kHz, is this caused by diffraction? Or is this caused by the fact that a driver is no longer an acoustically small dipole?

About the 2k bump. Please recognize that in the waterfall plot the response at each off axis location is normalized by the axial response. If you look at the axial response plot you will note a dip in the axial response at about 2k. Off axis this dip tends to smooth out somewhat with the result that the bump in the waterfall is somewhat exaggerated.

[john k...]

I've posted some updates. After experimenting with the system I decided to keep the tweeter x-o at 6k. I have changed the woofer system to an N frame dipole (this was an option in the original Note) and I will go with the SLS 10" woofers. XXLS woofer would increase the max SPL by only about 3dB and if greater max SPL and extended bass is desired it makes more sense to spend the additional money of one or two powered subs rather than on the XXLS woofer.

[Bratislav]

... or you can always try and shoehorn two SLS 12's. More Sd, more efficient, lower Fs, only extra 20 bucks. Would easily cover missing 3dB, and more.
Great design!
As always, I must add...

[ScottG]

John,

I've sent an email with a sketchup file to you (music and design email account). After a few tries yahoo registered it as being sent.

Try not to laugh to hard at the result..