Neo8PDR/Neo3PDR

fiat79 · 10th October 2009, 12:37 PM

Just wanted to share my experiences with these slightly difficult to use planars. I had initially just bought the Neo8PDR and planned to use them with a pair of older Seas TPXs in a simple two way. Boy, was I disappointed! That upper end peak drove me crazy and the notch seemed to take all the life out of it. Plus, I was trying for the minimum amount of crossover, out of the Seas and into the Neo as early as I could given the fs.

I read here about combining the Neo8 with the Neo3 and gave that a shot, rolling off the Neo8 around 7khz and into the Neo3, all on 6db slopes. This was much better but still not it - although I lived with it for about a year while I thought about it.

The turning point came when I gave up on "as little crossover as possible" and went for a full 12 db, allpass 3-way. WOW, what a difference a few components make! Believe me, when you get them right, these guys will reach out and grab you. Talk about clean, talk about clarity - well, you get the idea. Take my advice, they are worth the effort!

I agree BG could have done a bit more to make them easier to mount and presentable - I got matching steel faceplates from Meniscus (very inexpensive!) and that helped alot, but come on BG!

Anyway, just wanted to share.

paulfx · 15th October 2009, 05:41 AM

Oh, shoot, I was going to use that notch filter on the NEO8 and a first-order into a homemade Heil AMT tweeter! Now I think I'll do up an 18 dB/Octave crossover first and then later fool around with those seductive minimalist first orders with maybe some added dips and bumps.

Will · 15th October 2009, 06:17 AM

Quote:

Originally Posted by fiat79

The turning point came when I gave up on "as little crossover as possible" and went for a full 12 db, allpass 3-way. WOW, what a difference a few components make! Believe me, when you get them right, these guys will reach out and grab you. Talk about clean, talk about clarity - well, you get the idea. Take my advice, they are worth the effort!

Can you elaborate more on your implementation like e.g.
a) baffle size for the mid and highs - or is this on OB
b) exact crossover points
c) did you use active x-over
d) I'd assume you use another 8-10" for the bass section?

richard_majer · 15th October 2009, 07:24 AM

Hallo, here is result of my work :-)
http://www.majerovi.com/richard/bedn...e/899_9997.JPG

Jonasz · 16th October 2009, 04:25 PM

Richard: Very nice mounting plates, are they available online? Can you elaborate a little on your design and crossover? Subjective sound quality?

richard_majer · 16th October 2009, 05:07 PM

Quote:

Originally Posted by Jonasz

Richard: Very nice mounting plates, are they available online? Can you elaborate a little on your design and crossover? Subjective sound quality?

Thank you. They are custom made. It is pity that this kind of front plate is not available from BG.

The crossover was made by friend of my, I'm not capable to do it. And he asked not to publish details. Sorry for that.

and sound? How to describe it here... listening makes me happy.

a.wayne · 16th October 2009, 05:28 PM

Hello Fiat 79,

I tried the BG stuff , well quite sometime ago , say 10 + yrs and found the units highly efficient but not the sound i was expecting . Lot of reflective energy and grain ( relative to other planers) but very powerful .

Glad to hear you have gotten them to work .....

richard_majer · 16th October 2009, 05:49 PM

if you are interested in, you are welcome for listening :-)

a.wayne · 16th October 2009, 08:36 PM

Quote:

Originally Posted by richard_majer

if you are interested in, you are welcome for listening :-)

Jistě, hop, skákat a skok .......

fiat79 · 20th October 2009, 04:02 PM

Will,

My Neos are on a 11" w baffle as a dipole. I finally settled on classic 500/5k cx points with a zobel on the two Seas. No 8" or 10" needed - a small 10" sub provides low bass but the Seas do a very good job in my room to 45hz. And Meniscus sells acceptable faceplates for the Neos for cheap.

10th October 2009, 12:37 PM	#1
fiat79 diyAudio Member Join Date: Jul 2008	Neo8PDR/Neo3PDR Just wanted to share my experiences with these slightly difficult to use planars. I had initially just bought the Neo8PDR and planned to use them with a pair of older Seas TPXs in a simple two way. Boy, was I disappointed! That upper end peak drove me crazy and the notch seemed to take all the life out of it. Plus, I was trying for the minimum amount of crossover, out of the Seas and into the Neo as early as I could given the fs. I read here about combining the Neo8 with the Neo3 and gave that a shot, rolling off the Neo8 around 7khz and into the Neo3, all on 6db slopes. This was much better but still not it - although I lived with it for about a year while I thought about it. The turning point came when I gave up on "as little crossover as possible" and went for a full 12 db, allpass 3-way. WOW, what a difference a few components make! Believe me, when you get them right, these guys will reach out and grab you. Talk about clean, talk about clarity - well, you get the idea. Take my advice, they are worth the effort! I agree BG could have done a bit more to make them easier to mount and presentable - I got matching steel faceplates from Meniscus (very inexpensive!) and that helped alot, but come on BG! Anyway, just wanted to share.

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15th October 2009, 05:41 AM	#2
paulfx diyAudio Member Join Date: Aug 2009 Location: Cary, NC, USA	Oh, shoot, I was going to use that notch filter on the NEO8 and a first-order into a homemade Heil AMT tweeter! Now I think I'll do up an 18 dB/Octave crossover first and then later fool around with those seductive minimalist first orders with maybe some added dips and bumps.

15th October 2009, 07:24 AM	#4
richard_majer diyAudio Member Join Date: Dec 2005 Location: Rakovnik	Hallo, here is result of my work :-) http://www.majerovi.com/richard/bedn...e/899_9997.JPG

16th October 2009, 04:25 PM	#5
Jonasz diyAudio Member Join Date: Feb 2003 Location: Kristinehamn	Richard: Very nice mounting plates, are they available online? Can you elaborate a little on your design and crossover? Subjective sound quality?

16th October 2009, 05:28 PM	#7
a.wayne diyAudio Member Join Date: May 2008 Location: Front Row Center	Hello Fiat 79, I tried the BG stuff , well quite sometime ago , say 10 + yrs and found the units highly efficient but not the sound i was expecting . Lot of reflective energy and grain ( relative to other planers) but very powerful . Glad to hear you have gotten them to work .....

16th October 2009, 05:49 PM	#8
richard_majer diyAudio Member Join Date: Dec 2005 Location: Rakovnik	if you are interested in, you are welcome for listening :-)

20th October 2009, 04:02 PM	#10
fiat79 diyAudio Member Join Date: Jul 2008	Will, My Neos are on a 11" w baffle as a dipole. I finally settled on classic 500/5k cx points with a zobel on the two Seas. No 8" or 10" needed - a small 10" sub provides low bass but the Seas do a very good job in my room to 45hz. And Meniscus sells acceptable faceplates for the Neos for cheap.

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