Soraya CB105 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th September 2007, 12:15 AM   #1
diyAudio Member
 
Cloth Ears's Avatar
 
Join Date: Dec 2001
Location: Melbourne, Australia
Default Soraya CB105

Heard (a prototype of) this new amp from Hugh Dean last night at a demonstration at the Melbourne Audio Club. Along with a pair of 3-way "adjustable" speakers, this was commented on as being the "best sound" that people had heard for many years. It should be noted that the room itself doesn not really lend itself to audio demonstrations.

The speaker itself was made up of a Peerless XXLS 10" in a 65 litre passive radiator (for the first part of the night) and 65 litre sealed (for the remainder) - a Vifa P13WH in a sealed box (for the first few tracks) and then open backed with Tontine stuffing (fro the remainder that I was there) - a Scanspeak D2904 along with an Optimus dipole tweeter. The crossover is a first-order series between mid and bass (plus a zobel for each), and this is crossed (as a whole) to the tweeter using a third-order parallel crossover. The Optimus is used as the resistor in the zobel for the Scanspeak tweeter, or can be switched out. Told you it was "adjustable"...

The amp was displayed, open topped, and was very simple and well laid out and "pretty" to look at. And drove the speakers (in all configurations) with control and authority - which is not something that all amplifiers could do (IMHO). It did pretty much what all amplifiers should do - disappeared.
__________________
Jont.
"It is impossible to build a fool proof system; because fools are so ingenious."
  Reply With Quote
Old 20th September 2007, 04:54 AM   #2
diyAudio Member
 
vynuhl.addict's Avatar
 
Join Date: Mar 2006
Location: Vancouver, BC,Canada
Cloth Ears,


Short,sweet and to the point, aurally disappearing is one of the many things this amplifier does well. It does what it should do, play music as it is naturally, without obstruction or a sonic imprint from the gear itself causing you to get lost in and focus on the music, I have been enjoying listening to all of my old recordings that have become new once again with details once hidden .


Colin
  Reply With Quote
Old 20th September 2007, 05:37 AM   #3
diyAudio Member
 
Cloth Ears's Avatar
 
Join Date: Dec 2001
Location: Melbourne, Australia
The other thing that was good about it in this particular demonstration, was that we were able to listen to the changes brought about by the various combinations of the speaker set-up (it's really quite ingenious) without having to put up with the limitations of the amplifier in being able to driver the crossover/driver combination. OK, so we didn't have a Apogee Scintilla to really test its' driving abilities . Nothing worse than having an amplifer blow a fuse when you ask it to drive 1 ohm loads .
__________________
Jont.
"It is impossible to build a fool proof system; because fools are so ingenious."
  Reply With Quote
Old 20th September 2007, 08:51 PM   #4
diyAudio Member
 
destroyer X's Avatar
 
Join Date: Feb 2004
Location: Recife - Brasil Northeast
Default This one is the best amplifier i could listen to


This Soraya is not more, not less, than the best.

regards,

Carlos
__________________
Brazilian Airways Christmas Message to all of you!
https://www.youtube.com/watch?v=HFGM5K-WWnY#t=135; Unbeatable!; https://www.youtube.com/watch?v=u4tGBiqMnzQ
  Reply With Quote
Old 20th September 2007, 11:21 PM   #5
AKSA is offline AKSA  Australia
diyAudio Member
 
Join Date: Sep 2001
Location: Melbourne, Australia
Thanks Jont, Colin and Carlos! It was a good night and I was pleased. The speaker was a doddle to drive, it was so well designed.

The Soraya CB105 is extraordinarily load tolerant. I took an Acustat recently to almost destructive levels and the amp didn't raise a sweat. There is no sonic influence at all with a 0.47uF cap switched across the speaker while playing, with no sign of instability when viewed on the CRO.

This amp will be exhibited at Denver RMAF with Ellis 1801b speakers and I welcome any member here to have a listen - particularly those who feel these achievements are not credible! (Andy, can I buy you a beer??)

Ciao,

Hugh
__________________
Aspen Amplifiers P/L (Australia)
www.aksaonline.com
  Reply With Quote
Old 21st September 2007, 01:15 PM   #6
diyAudio Member
 
sparkle's Avatar
 
Join Date: Oct 2003
Location: middle of nowhere...
Hugh,
this is very good news.....very nice ..... keeep the good work going....still going up...allways....for sure

congratulations....
  Reply With Quote
Old 21st September 2007, 01:18 PM   #7
AKSA is offline AKSA  Australia
diyAudio Member
 
Join Date: Sep 2001
Location: Melbourne, Australia
Hi Daniel,

I'm moving towards an ultra low distortion model. New amp has 15 devices per channel, quite complex. I've found that huge quality gains are possible by better controlling very low amplitude signals, around the dead zone of crossover. Feedback is now nested, and compensation is quite complex. It's an amp I'm pleased with, certainly, but will only sell as a retail product.

Trust you are well!

Hugh
__________________
Aspen Amplifiers P/L (Australia)
www.aksaonline.com
  Reply With Quote
Old 21st September 2007, 07:43 PM   #8
diyAudio Member
 
sparkle's Avatar
 
Join Date: Oct 2003
Location: middle of nowhere...
yes i am fine - thank You - LF is working very nice from the day one (well, actually since it was burned in completely)...
now i am playing with some power amplifier designs that i would like to build ...one is on the way....we will see....of course LF will be the reference...


15 devices...wow....nice....nested feedback ..... nice....
  Reply With Quote
Old 27th September 2007, 06:31 AM   #9
diyAudio Member
 
vynuhl.addict's Avatar
 
Join Date: Mar 2006
Location: Vancouver, BC,Canada
Hi Sparkle,


15 devices that work together to pass through with gain some of the
most lucid and involving sonics to ever pass by these ears ever!, all without any hint of typical SS glare and edginess that is often associated with a transistor design. To be able to do this, without added coloration and with very low distortion is a wonderful combination. I hope Hugh the best on this one as he has nailed it in sonics and realism that is hard to beat and possibly unsurpassed in the nth degree. and I feel will be a rose smelling time to some EE's, further proof that a design should be met by both ears and measurements, but finalised by ear.

Best Wishes
Colin
  Reply With Quote
Old 27th September 2007, 08:14 AM   #10
diyAudio Member
 
sparkle's Avatar
 
Join Date: Oct 2003
Location: middle of nowhere...
that is really good Colin,

i am happy for you and i wish all the best for Hugh...
i have Lifeforce and i am very happy with it...sounds nice with my tube preamplifer....
Soraya seems to be ultra super turbo upgrade on the LF sound.... this makes me a bit sad - makes me wanna jump out of couriosity - but still i am also very happy for Hugh....
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 11:45 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2