Scanspeak Reference plus or Troels CNO2.5 ?

miamiphoto · 29th June 2010, 08:26 AM

Hi to all
I need a suggestion....
I'm looking for a new loudspeaker.
At the end the candidates are

Troels CNO 2.5
CNO 2.

Scanspeak Reference Plus
Scan Speak bouwtekeningen

The reference is cheaper about of 300 €
I have to use with my valve amp (50 watt).

and the winner is.....

aptquark · 29th June 2010, 09:46 AM

great...I had a hard enough time trying to figure out wtf I was going to build...AND YOU DO THIS TO ME!!!!

Have you looked at Troels DQWTL plans? It seems you want efficiency for low wattage applications.

Spiro

miamiphoto · 29th June 2010, 11:59 AM

I think that DQWT plans of troels are too expensive.
My valve tube is a push pull 60 watt, for that reason not poor, i think
that reference or CNO are ok for him
I dont know sensibility of reference plus loudspeaker,
the CNO 2,5 has 91 db...

aptquark · 29th June 2010, 12:23 PM

Yes it is expensive...95 db sensitivity if I remember correctly. I do like your choices though. I would lean towards Troels model. His research in the field is something to NOT take for granted.

Cheers

miamiphoto · 29th June 2010, 01:10 PM

For that reason I understood that you advice me CNO 2.5 instead Reference Plus.
Really sensibility of Reference plus is 95 db?

giralfino · 29th June 2010, 05:48 PM

The DQWT is 95 dB, the CNO 2,5 is 91 dB.
There are no data for the Reference Plus, but the tweeter is 91 dB and has an L-pad, so overall sensitivity should be lower (86-88? dB)

Ralf

dublin78 · 29th June 2010, 06:33 PM

Hi

You should also consider Zaph's 2.5 way version of the ZRT: Zaph|Audio - ZRT - Revelator Tower

Complete kit available from Madisond at excellent price for us Europeans (even with shipping): https://www.madisound.com/store/prod...oducts_id=8448

5th element · 29th June 2010, 06:54 PM

I'd be far more inclined to build the Zaph design. The ~3.4khz xover point used in Troels design doesn't, imo, make the best out of either of its drivers.

The tweeter can handle a really low xover point so why not exploit that factor? You'd end up with better off axis performance, lower distortion and better stored energy characteristics if you did.

nicoch58 · 29th June 2010, 07:09 PM

On my scan have the troels xover , very good ,is a key in speakers...

I vote for Cno2.5, low impedence but tube friendly..(you have 4ohm tap?)

ask Troels, is nice man , put your name/state on mail...

nicoch58 · 07:18 PM

Zap very nice too

dont worry for upper xover point ,sound a lot better

my 9700 sound better on troels vs my at 1800hz (all 18db)

PS
Now I'm openbaffle fullrange ,no box ,no tw and xover on the midrange...a lot better

29th June 2010, 08:26 AM	#1
miamiphoto diyAudio Member Join Date: Apr 2009	Scanspeak Reference plus or Troels CNO2.5 ? Hi to all I need a suggestion.... I'm looking for a new loudspeaker. At the end the candidates are Troels CNO 2.5 CNO 2. Scanspeak Reference Plus Scan Speak bouwtekeningen The reference is cheaper about of 300 € I have to use with my valve amp (50 watt). and the winner is.....

29th June 2010, 06:33 PM	#7
dublin78 diyAudio Member Join Date: Mar 2006 Location: Cheshire	Hi You should also consider Zaph's 2.5 way version of the ZRT: Zaph\|Audio - ZRT - Revelator Tower Complete kit available from Madisond at excellent price for us Europeans (even with shipping): https://www.madisound.com/store/prod...oducts_id=8448 __________________ Regards. Michael

29th June 2010, 06:54 PM	#8
5th element diyAudio Member Join Date: Oct 2002 Location: England	I'd be far more inclined to build the Zaph design. The ~3.4khz xover point used in Troels design doesn't, imo, make the best out of either of its drivers. The tweeter can handle a really low xover point so why not exploit that factor? You'd end up with better off axis performance, lower distortion and better stored energy characteristics if you did. __________________ What the hell are you screamin' for? Every five minutes there's a bomb or somethin'! I'm leavin! bzzzz! Droggon Attack!

29th June 2010, 07:09 PM	#9
nicoch58 diyAudio Member Join Date: Oct 2004	On my scan have the troels xover , very good ,is a key in speakers... I vote for Cno2.5, low impedence but tube friendly..(you have 4ohm tap?) ask Troels, is nice man , put your name/state on mail... __________________ Sic58

29th June 2010, 07:12 PM	#10
nicoch58 diyAudio Member Join Date: Oct 2004	Zap very nice too dont worry for upper xover point ,sound a lot better my 9700 sound better on troels vs my at 1800hz (all 18db) PS Now I'm openbaffle fullrange ,no box ,no tw and xover on the midrange...a lot better __________________ Sic58 Last edited by nicoch58; 29th June 2010 at 07:18 PM.


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29th June 2010, 09:46 AM	#2
aptquark diyAudio Member Join Date: Jun 2010 Location: MS Blog Entries: 1	great...I had a hard enough time trying to figure out wtf I was going to build...AND YOU DO THIS TO ME!!!! Have you looked at Troels DQWTL plans? It seems you want efficiency for low wattage applications. Spiro

29th June 2010, 11:59 AM	#3
miamiphoto diyAudio Member Join Date: Apr 2009	I think that DQWT plans of troels are too expensive. My valve tube is a push pull 60 watt, for that reason not poor, i think that reference or CNO are ok for him I dont know sensibility of reference plus loudspeaker, the CNO 2,5 has 91 db...

29th June 2010, 12:23 PM	#4
aptquark diyAudio Member Join Date: Jun 2010 Location: MS Blog Entries: 1	Yes it is expensive...95 db sensitivity if I remember correctly. I do like your choices though. I would lean towards Troels model. His research in the field is something to NOT take for granted. Cheers

29th June 2010, 01:10 PM	#5
miamiphoto diyAudio Member Join Date: Apr 2009	For that reason I understood that you advice me CNO 2.5 instead Reference Plus. Really sensibility of Reference plus is 95 db?

29th June 2010, 05:48 PM	#6
giralfino diyAudio Member Join Date: Feb 2009	The DQWT is 95 dB, the CNO 2,5 is 91 dB. There are no data for the Reference Plus, but the tweeter is 91 dB and has an L-pad, so overall sensitivity should be lower (86-88? dB) Ralf

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