Volunteer sir sanders zingmore Posted November 20, 2017 Volunteer Share Posted November 20, 2017 I know Bill Mclean sells these but just wondering if anyone knows these amps ? Made by David Berning, the technology looks very interesting but not I'm not sure I understand how they work? The Berning ZH amplifiers take advantage of new technology in order to eliminate the audio-output transformer. These amplifiers use radio frequency to change the voltage-current transfer characteristics of the output tubes from their normal impedance-plane to one suitable for driving a dynamic loudspeaker. The radio frequency re-mapping is implemented using special high-frequency power conversion techniques. The high-voltage, low-current tube impedance-plane is re-mapped to the high-current speaker impedance-plane through a special transformer at a constant RF carrier frequency of 250 kHz (500 kHz for the ZH230). Because the audio signal is riding on a carrier, it is not subject to parasitic elements of the transformer that would otherwise distort the audio signal. There is no low-frequency limit for this impedance conversion, and these amplifiers are dc-coupled, with the exception of a small, high-quality, dc-blocking capacitor at the input of the amplifier to prevent the amplification and application to the speaker of any dc that might be present at the input. http://davidberning.com/products/zh230 Link to comment Share on other sites More sharing options...
Darren69 Posted November 20, 2017 Share Posted November 20, 2017 Good luck. Link to comment Share on other sites More sharing options...
acg Posted November 20, 2017 Share Posted November 20, 2017 3 minutes ago, Sir Sanders Zingmore said: these amplifiers are dc-coupled, with the exception of a small, high-quality, dc-blocking capacitor at the input of the amplifier I don't know the amps per se, but that above is some really bad marketing talk, especially the bit in my quote ^^^^. If they have a capacitor at the input then they are AC not DC coupled no matter what BS the spin department wants to use. 1 Link to comment Share on other sites More sharing options...
Martykt Posted November 20, 2017 Share Posted November 20, 2017 OTLs intrigue me but unfortunately so far I haven't had the opportunity to hear one..... Just based on reputation alone in particular the Berning is definitely on my 'want to hear' list !! When you get one sent down for an audition make sure you invite me over for a listen okay Sir Sanders !!! 1 Link to comment Share on other sites More sharing options...
Martykt Posted November 20, 2017 Share Posted November 20, 2017 BTW Sir Sanders you're looking at the wrong Berning too....... He also makes some monoblocks with our favourite tube !!! http://davidberning.com/products/zh_211_845 Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted November 20, 2017 Author Volunteer Share Posted November 20, 2017 20 minutes ago, Darren69 said: Good luck. Will I need it ? (Why?) Link to comment Share on other sites More sharing options...
Darren69 Posted November 20, 2017 Share Posted November 20, 2017 8 minutes ago, Sir Sanders Zingmore said: Will I need it ? (Why?) Am nearly recovered from my AM amps thread. The other Berning gear looks very nice as well. 1 Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted November 20, 2017 Author Volunteer Share Posted November 20, 2017 22 minutes ago, Darren69 said: Am nearly recovered from my AM amps thread. The other Berning gear looks very nice as well. I'm still confused ? Link to comment Share on other sites More sharing options...
Martykt Posted November 20, 2017 Share Posted November 20, 2017 1 hour ago, Sir Sanders Zingmore said: I'm still confused ? See Wavac 833 frequency response....... ? Hopefully you're threads safe Sir Sanders, I don't think Wavac make an OTL..... ? 1 Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted November 20, 2017 Author Volunteer Share Posted November 20, 2017 1 hour ago, Martykt said: See Wavac 833 frequency response....... ? Hopefully you're threads safe Sir Sanders, I don't think Wavac make an OTL..... ? I get it now. Back on topic, does anyone understand what this RF carrier signal thing means ? Link to comment Share on other sites More sharing options...
Martykt Posted November 20, 2017 Share Posted November 20, 2017 (edited) 37 minutes ago, Sir Sanders Zingmore said: I get it now. Back on topic, does anyone understand what this RF carrier signal thing means ? From what I can gather the audio signal is modulated on a carrier signal in the same way that FM or AM radio works. (Not sure whether Berning modulates amplitude or frequency ??) A much smaller transformer that doesn't have the deficiencies of bulky transformers then can be used for the impedance conversion. The carrier wave is then filtered out giving the original audio signal. I think that's roughly how it works...... There is also the patent on his website which goes into more detail on how it works. Pretty heady reading though....... ? http://davidberning.com/technology http://davidberning.com/technology/patent5612646 Edited November 20, 2017 by Martykt 1 Link to comment Share on other sites More sharing options...
Blk plastic Posted December 24, 2017 Share Posted December 24, 2017 @Sir Sanders Zingmore Did you end up checking out the ZOTL amps? Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted December 24, 2017 Author Volunteer Share Posted December 24, 2017 2 hours ago, Blk plastic said: @Sir Sanders Zingmore Did you end up checking out the ZOTL amps? No. Never followed it up actually Link to comment Share on other sites More sharing options...
Blk plastic Posted December 24, 2017 Share Posted December 24, 2017 The Micro Zotl 2.0 headphone/pre is absolutely stunning. I'm running mine through an Elektra Reference Hd into a pair of Maggie 1.7's and together they make a beautiful noise.In my system the Zotl left Arthur's latest pre for dead. Give it a listen if you can. 1 Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted January 4, 2018 Author Volunteer Share Posted January 4, 2018 On 12/24/2017 at 2:52 PM, Blk plastic said: The Micro Zotl 2.0 headphone/pre is absolutely stunning. I'm running mine through an Elektra Reference Hd into a pair of Maggie 1.7's and together they make a beautiful noise.In my system the Zotl left Arthur's latest pre for dead. Give it a listen if you can. would love to hear this driving my horns! Link to comment Share on other sites More sharing options...
Blk plastic Posted January 4, 2018 Share Posted January 4, 2018 9 hours ago, Sir Sanders Zingmore said: would love to hear this driving my horns! If detail is your thing,this pre has it in spades. I'd like to hear this 1 watt integrated drive your horns as well. Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted January 4, 2018 Author Volunteer Share Posted January 4, 2018 47 minutes ago, Blk plastic said: If detail is your thing,this pre has it in spades. I'd like to hear this 1 watt integrated drive your horns as well. You aren't in Melbourne by any chance? Link to comment Share on other sites More sharing options...
Blk plastic Posted January 4, 2018 Share Posted January 4, 2018 4 minutes ago, Sir Sanders Zingmore said: You aren't in Melbourne by any chance? No unfortunately, I'm on the central coast of NSW. If you're ever up this way,you're more than welcome to have a listen. Link to comment Share on other sites More sharing options...
Guest Posted January 4, 2018 Share Posted January 4, 2018 On 20/11/2017 at 12:53 PM, Martykt said: BTW Sir Sanders you're looking at the wrong Berning too....... He also makes some monoblocks with our favourite tube !!! http://davidberning.com/products/zh_211_845 $75k US....... yowza. 1 Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted January 4, 2018 Author Volunteer Share Posted January 4, 2018 17 minutes ago, Blk plastic said: No unfortunately, I'm on the central coast of NSW. If you're ever up this way,you're more than welcome to have a listen. I'm currently near Hawks Nest, but we're leaving to tomorrow Link to comment Share on other sites More sharing options...
Martykt Posted January 4, 2018 Share Posted January 4, 2018 31 minutes ago, Grizzly said: $75k US....... yowza. Scary thing is the 211 monoblocks (okay not 845 as I would prefer but close enough....) I would buy if I could are over twice that...... Link to comment Share on other sites More sharing options...
Rob181 Posted January 4, 2018 Share Posted January 4, 2018 Save yourself $70k & use the "poor mans" version... Though these are said to be very good... And a bargain for the money... Link to comment Share on other sites More sharing options...
Blk plastic Posted January 5, 2018 Share Posted January 5, 2018 5 hours ago, Sir Sanders Zingmore said: I'm currently near Hawks Nest, but we're leaving to tomorrow Very tight schedule there, I'm 2 hours away near The Entrance. I can't make that work. Bummer! Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted January 5, 2018 Author Volunteer Share Posted January 5, 2018 3 minutes ago, Blk plastic said: Very tight schedule there, I'm 2 hours away near The Entrance. I can't make that work. Bummer! Not to worry. Would have annoyed my family no end anyway 1 Link to comment Share on other sites More sharing options...
Tony M Posted January 5, 2018 Share Posted January 5, 2018 The amps Bill was using at the Melbourne Audio Show were the Linear Tube Audio ZOTL's as designed by David Berning. Link to comment Share on other sites More sharing options...
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