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Aria Line-Stage

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Graham Slee View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2013 at 6:18pm
Whether or not the demand for remote control is strong, if it isn't on offer many will not bother to consider the Aria.

I developed the remote control circuitry some months ago. It is completely different to any conventional remote control to avoid clashes between equipment. It is still an IR control and the signal is coded so no worries about ambient lighting having an adverse effect.

The motorised pot and remote control receiver can be housed on a sub board which could be retro-fitted after removal of the non motorised pot which would be fitted to the manual version.

Therefore those who do not want remote control can buy the manual version, and those who do want remote control can buy the remote control version. And those who want to upgrade to remote control can have it upgraded also. Cool

Having worked on professional high end studio equipment I know the virtues of conductive polymer potentiometers. I am hoping to make conductive polymer the standard volume control on the manual version, and I will be trying some out on my Solo Ultra Linear DE first because it is a lot easier hearing differences on headphones.

I also intend to make a stereo balance pot a standard issue. However it will only give +/- 3dB at full travel and its effect when centered or even slightly off centre will be virtually zero. And after all, it doesn't mix any left with right - all it can do is vary the gain so I just don't know what the fuss is about... come on, which idiot frightened people? I'd like to know?

As for reliability, this is why I am so interested in conductive polymer. You can pay a fortune for other preamps fitted with carbon if you want. The reason for using conductive polymer in studio gear is for reliability and quality. Carbon is carbon... it is what the "lead" of a pencil is made of.

And lastly (in this reply), what good are switched attenuators? How many switch contacts are there? 24? 36? Quite a lot of switch contacts to go faulty. All those bits of metal rubbing against other bits of metal. Not bad if they are hard gold plated - and hard gold plate is 9 carat and not the 22 carat I've seen being talked about so much about in hi-fi, and which is as soft as...

Source selectors have to be switches, but they are not subject to the rate of adjustment switched attenuators would be. Most good quality rotary switches are rated for 10,000 operations. Work it out for yourself. Sometimes I have to ask if hi-fi is about a load of people just crying out to be conned?

Graham
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Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2013 at 6:43pm
Originally posted by Graham Slee Graham Slee wrote:

 Therefore those who do not want remote control can buy the manual version, and those who do want remote control can buy the remote control version. And those who want to upgrade to remote control can have it upgraded also. Cool
Sorted! Excellent Thumbs Up
Bob

Majestic DAC/pre-amp
Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
2 x Proprius + Spatia/Spatia Links
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jan 2013 at 9:10pm
It's starting to sound a lot like great British Hi-fi. Smile And its eminence is imminent.
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BAK Quote  Post ReplyReply Direct Link To This Post Posted: 29 Mar 2014 at 10:27pm
Originally posted by Graham Slee Graham Slee wrote:

Cyreg,

Is this UL? Yes! It is the very epitome of ultra-linear. It is just that the technique is supplied in a different configuration, but the technique still pays off.

Let's restate what IMO ultra-linear is: 1] linear input (or as close as possible); 2] wide bandwidth open loop gain; 3] the smallest amount of negative feedback to result in acceptable distortion and noise - in our case we consider that to be less than 0.05%THD and for a line stage preamp better than -80dB noise; 4] similar distortion at all frequencies - usually THD grows with increasing frequency; 5] class-A wherever possible (class AB acceptable for a power amp provided the bias is sufficient to null out to the lowest THD reading); 6] Good phase and gain margins for high frequency stability...

This is achieved in all our ultra-linear adaptations.

As I grow older I take much more time over the finest details - I never want our designs to be the subject of blame. They must impress in every area for a very long lifetime and must be ambassadors of correctness.


Graham,
I thought your above statements needed restating.
One could not state your design/work ethic any better!Wink
True dedication to transparency in sound reproduction.

The ARIA Line Stage may be still needed?Confused
  I'm sure the consumer market would like the remote/manual volume option.
I for one would like to see it, maybe call it the DOVE connection?Wink
Gotta love a DOVE!Smile
Bruce
AT-14SA, Pickering XV-15, Hana EL, Technics SL-1600MK2, Lautus, Majestic DAC, Technics SH-8055 spectrum analyzer, Eminence Beta8A custom cabs; Proprius & Reflex M or C, Enjoy Life your way!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote morris_minor Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2014 at 2:12pm
Well worth re-posting that Bruce! 

(BTW, weren't The Ambassadors of Correctness the post-punk brothers of The Sultans of Swing? LOL)
Bob

Majestic DAC/pre-amp
Accession MC/Enigma, Accession MM, Reflex M, Elevator EXP, Era Gold V
Solo ULDE, Novo, Lautus USB and digital, Libran balanced, CuSat50
2 x Proprius + Spatia/Spatia Links
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