David Berning Co Custom Mono Amps and Octal Preamp

Very rare opportunity to own a one-of-a-kind pair of custom made, bespoke David Berning Co. pure vacuum tube 100W (min.) ZOTL push-pull mono block amplifiers and Octal capacitance coupled pure vacuum RIAA + Line level preamp with external power supply.  (Note: Preamp SOLD.)

I can guarantee you will not find another pair of Berning ZOTL vacuum tube mono blocks quite like these.  They are amazingly musical, transparent and dynamic with authority plus amazing drive.  David Berning is a genius designer who has remained at the forefront of cutting edge vacuum tube amplification since the mid 1970's.  These have been my personal reference amplifiers for a number of years and are supremely reliable, having never required any service.  For personal reasons, I have decided to reluctantly offer them for sale to the right discerning buyer and music lover.  These over engineered ZOTL mono amplifiers as you may guess from the photographs are very powerful with enormous headroom and air read: true-to-life recording scale. Berning ZOTL amplifiers are renowned for delivering musicality, raw lightning fast dynamic transients, power, thunderous low bass authority and articulation with refinement in spades.  Many special upgrades almost too numerous to list.  Refer below for some details about these extraordinary, ultra reliable vacuum tube amps.  

Together with the mono blocks, this is a rare opportunity to own a bespoke custom made, point-to-point wired David Berning Co. octal pure vacuum tube preamplifier with built in passive RIAA phono section section and outboard resonant switching vacuum tube power supply.  Unlike Berning's later preamp offerings, this is a capacitance coupled design offering even greater midrange weight, palpability and body.  Features many hand selected upgrades and component options.  The line stage features NOS 6SN7 octal vacuum tubes with NOS 12SF5 tubes in the phono section.  Playback is dynamic, clear and lively, offering a true 3D holographic dimensionality, with solid imaging and an open, grain free musicality with simply wonderful timbre and tonal characteristics.  As an octal tube based design, this Berning Preamp requires a high quality, heavy, high mass equipment rack to perform at its best.

Call me directly 219.933.8115 with questions, or email [email protected]

Berning ZOTL Mono Amplifier Specifications:
Output Tubes: (2)  6JN6 Triode / (2) 12AT7 and (1) 12AV7 (Per Mono Block x 2/ea.)
Power Output - Minimum 100W @ 8ohms per channel high current (Stable at lower impedances) will drive literally almost any loudspeaker, including dynamic and electrostatic / planar type.
Class A/B Operation.
Massive power supply features 500,000 microfarad filter capacitance total per ea./ Monoblock. This equates to 1,000,000 microfarad's total. =  Tremendous headroom!
ESL Direct Drive capability - 5000 Volt per channel peak-to-peak configurable for electrostatic loudspeaker use only.
Ultra High Bandwidth Design and DC Coupled.
Fully balanced Internal Design.
Selectable 3-Way Feedback switch LOW, MED and NORM for proper matching of loudspeaker damping characteristics.  No Phase compensation.
Patented Berning ZOTL Output Transformerless pure vacuum tube design.
Cycle by Cycle Auto Biasing vacuum tube circuitry.
Brown out surge protection circuitry built in.
Power Filter and Surge suppressor built in.    
Input Impedance 50k
Custom point-to-point internals hand wired by David Berning.
Pure Silver Coils (Output - Spare set included)
Pure Copper Coils (Output - installed)
Jupiter Copper Foil Paper in wax Coupling Capacitors.
Pure solid core Neotech OFPCC Cryogenically treated internal wire.
Pure Copper Cardas Speaker Binding Posts.
Furutech pure Copper IEC inlet.
Power Requirements:  AC 120v/60Hz mains / 220v/50Hz configuration optional.
Dimensions external:  L 23 1/4" W 13 3/4" H 15"
Weight: 60lbs./ea x 2.


Berning Vacuum Tube Preamp Specifications:  (SOLD)

David Berning Custom Made Pure Vacuum Tube Octal Preamplifier.
Custom Made Black Aluminum Chassis and Vented Black Aluminum Power Supply Enclosure.  Capacitance Coupled Design.
Features Point-To-Point Wiring Internally.
Line Stage section: (4) 6SN7 octal vacuum tubes (Sylvania 6SN7 VT-231 NOS Chrome tops included.)
Passive RIAA Phono Stage section: (4) 12SF5 octal vacuum tubes  (Note: Conversion to 12AX7 ~ 12AV6 single triode tube is possible by tube socket modification for lower noise.)
Outboard Choke Type Resonant Switching Pure Vacuum Tube Power Supply: 33JV6 vacuum tubes.
Cathode Follower Output.
No additional filters.
Turn On / Turn Off Auto Mute Function.
High Level Gain 18dB
MM Phono Stage Gain 46dB
MC Phono Stage Gain with SUT 64dB
Jensen JT-347-AXT Step Up transformers included (1:12 ratio configured)
Rear Phono Plug Resistor Type Loading (RCA) (Spare Loading resistors included) for Right/Left channel.   
Line Outputs - (2) sets total RCA terminated.  
Line Inputs - (2) Line Level, (2) 47k MM and (2) MC (Includes (1) pair for additional resistor loading plugs).
Jupiter  Copper Foil Paper & Wax Capacitors (Line, 2.2 uf) Jupiter Copper Foil Paper & Wax Capacitors (Phono)
Ceramic & Teflon Tube Sockets.
Cardas Pure Copper Ground Post.
Furutech Gold Plated IEC inlet.
GoldPoint 50K Stepped Volume Attenuator
GoldPoint Selector Switch 2-Pole / 5-position
Cardas Gold Plated Female RCA Input / Output Jacks 

Worldwide Shipping.   
Please contact me with any further questions. 
 
Christopher Thornton    Artisan Fidelity    219.933.8115   [email protected]    www,artisanfidelity.com