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Al.M

Difference among good solid state amps regardless of price and build

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52 minutes ago, The Fez said:

...so where can one get one of these Technical Brain offerings...

Zensati Australia are meant to be the importers.  I'm sure there's someone in Australia who carries Technical Brain but I can't find anyone advertising them in a quick search.

 

http://www.zensatiaustralia.com/dealers/

 

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11 minutes ago, Cafad said:

Zensati Australia are meant to be the importers.  I'm sure there's someone in Australia who carries Technical Brain but I can't find anyone advertising them in a quick search.

 

http://www.zensatiaustralia.com/dealers/

 

I bought my amplifier from him. Pretty sure he sells direct but maybe not. He is a member on SNA but not sure how often he actually gets online.

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19 hours ago, The Fez said:

...so where can one get one of these Technical Brain offerings...

Why not ask Cafad if he would sell you his and save yourself a small fortune, actually on second thoughts a huge fortune!

 

cheers Terry

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On 01/10/2019 at 12:30 AM, stereo coffee said:

Therein the problem it has eluded widespread commercial manufacture due to ongoing repeat sales with voltage amplifiers 

but here is one    http://www.integeraudio.com

 

The concept raising its advantages vs voltage drive is discussed here: 

 http://www.ultrasound-hifi.com/Us_wh_1/FR/Amplificatori/pilot_corrente_en.html

and discussed generally  https://sound-au.com/articles/current-drive.htm

and   http://www.firstwatt.com/pdf/art_cs_amps.pdf

 

and at forum  

 

and https://www.diyaudio.com/forums/solid-state/300321-current-drive-amplifier.html

 

 

 

I also found this from Lenard Audio-

"Current drive comparison   If the speaker Impedance remained a constant 8R over the frequency spectrum there would be little to zero auditory difference between Voltage-drive and Current-drive.   All cone speakers vary Impedance over the frequency spectrum (approx 500%) and the auditory difference between Voltage-drive and Current-drive is very noticeable to extreme.   With most cone speakers, Voltage-drive appears to sound flat and dead,   the bass and high frequencies appear reduced,   as if a blanket has been placed over the speaker.

Voltage Current drive comparison

  1. Voltage-drive   power is inversely proportional to speaker Ω
          therefore    power decreases as the speaker Impedance rises.
     
  2. Current-drive   power is directly proportional to speaker Impedance
          therefore    power increases as the speaker Impedance rises.

In Current-drive the bass and hi-frequencies appear to spring to life with clarity and detail.   If given the opportunity for comparison, every human with ears regardless of age, sex, creed or color will hear the difference   and will immediately choose Current-drive as the preferred listening option, if the option was available.   Every musician (guitar and bass player) instantly hears the brighter response of Current-drive and will immediately choose it,   if given the opportunity to compare."

 

 

Unfortunately the vast majority of SS amps are voltage drive.

As I understand it the Bakoon amps are current drive and to me they just sound more "right" than the vast majority of SS and Class D amps. The difference is even quite hard to describe but it is there and once you get used to it you can't unhear it.It is especially obvious on piano which catches so many amplifiers and speakers out.You just have to be much more careful with speaker matching with current drive amps although I suspect a solid state current drive amp is less sensitive to that than most SETs.

 

 

Edited by THOMO

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