Proudly presents the

Mercury II
preamplifier


featuring the Type 85 six pin triode
and optional remote

from


Product Information 

We are proud to offer the top of the line Mercury 2 Cascode vacuum tube line stage preamplifie.. It features the Type 85 six pin triode vacuum tube, and all vacuum tube rectification, using  the 5AW4 octal tube rectifier. The Mercury 2 Cascode preamplifier is the next step beyond the highly acclaimed UltraVerve. Designed around the beautiful Type 85 triode vacuum tube because of, quite simply, its ability to touch the ineffable.

 deHavilland developed this line stage to complement their single ended triode amplifiers. One of the things they achieved was to design a preamp that did not damage the dynamic quality of the music. The Mercury 2 Cascode line stage is a true zero negative feedback Class A design. The tube complement coupled with tube rectification produces a huge, full-bodied soundstage and an angelically sweet and dynamic midrange.  This preamp is just a joy to listen through.

The Mercury 2 Cascode preamplifier features 100% hand wired point-to-point circuitry in the audio as well as the power supply circuit. The brushed aluminum front panel is available with either a silver or black anodized finish.. It features a soft start turn on circuit for gentle startup. The design places very little stress on the tube complement. This assures extremely long  service and sonic life of the tubes. Quality, Value, and Performance, by deHavilland, "Hand made in California with a passion for sound since 1997"

according to Kara (deHavilland's chief engineer):

The vacuum tubes we employ give you what in "Tube Lore" is described as "BIG TONE", something you just can't get with nine pin miniature tubes found in most preamps. 12AX7’s or 6922’s just can't get there. While many companies say that the simplest circuit is the best, they don’t practice what they preach -- they have miles of circuitry and solid state regulation everywhere. Our R&D shows that regulated power supplies can ruin the dynamics and imaging, just like too much feedback does. We spend more time and money on our filtering and use big, strong 5U4 and 5AW4 tube rectifiers, because they provide super dynamics. Furthermore, all of our power supply and audio circuit wiring is point to point, using the best wire available and the best dielectric known to man -- air. And while others may dress their equipment up with fancy gold or chrome plating and exotic woods that offer little or no sonic improvement, we prefer to use premium components and provide you, the listener with affordable, high quality equipment.  Our gear is literally overbuilt to last a lifetime!  At deHavilland, we are serious when we say that we want more listeners to be able to experience the beauty of single-ended vacuum tube sound, making this type of pre amplifier available to a much wider range of listeners -- that's our story.


deHavilland Mercury II grip cap image

Grid caps, custom made on a CNC vertical mill, feature pure billet copper spring loaded contact.
Please note the grid caps are completely safe and do not carry any DC voltage.

Design Specifications 

bandwidth                        20Hz to 80 kHz
output class                     Class A 
feedback                          zero negative feedback
maximum output             30 volts p-p, gain approximately 12dB

signal triodes                   2 X Type 85 SingleTriode
cathode follower              2 X 6BL7 Dual Triode Cascode Circuit
rectifier tube                   1X 5AW4
signal/noise ratio             85dB    
inputs                               four stereo 
outputs                             two stereo
input impedance              50k ohms.
output circuit                   Cathode follower, minimum 10k Ohm load             

dimensions                      18"w, 11"d, 6"h

weight                              26 lbs. including shipping carton.

Product Features

* All tube complement
* Vacuum tube rectification
* Heater warm up delay timer
* Cardas Cable
* Silver teflon coated high purity copper wire
* Wonder Solder
* 100% hand wired point to point circuitry
* NEW! Silver or Black anodized brushed aluminum front panel
* Paint filled engraved logo
* Brushed aluminum anodized silver or black
* Output level balance controls - optional
* Side Wood Panel Ready- Chassis includes 2 per side 8-32 threaded anchor points to mount custom side panels.
* Shielded AC supply IEC cable
* High voltage power supply transformer
* High voltage 5AW4 rectifier tube
* Ground floating switch
* Vampire high purity solid copper wire
* Military Spec Paper in Oil Capacitors
* Auricap Capacitors
* Roederstein Resistors

* Goldpoint stepped attenuator features Smooth "precise feeling" turning torque. Highest quality, Swiss made switch components. 24 position switches with "make before break" contacts. Silver plated rivet type switch contacts with gold anti-corrosion coating.

OR

*Stereo Alps Motorized Potentiometer Volume Control instead of the Goldpoint Stepped Attenuator Volume Control.
Features Remote volume control with mute on -off feature, infra red remote control.

 


Call or email for current Black Swamp Audio pricing.

Pricing:
Mercury 2 Preamplifier-----------------------------------------------------------$ 3,995.00
Mercury 2 Remote Control Preamplifier------------------------------------------$ 4,495.00


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