So if you take a used MKIII and gamble that it will be just fine, good luck. If you're in the class that believe the "original" condition amp will sound better than an all new one, good luck. I've run that road and simply find it disappointing and often more expensive in the long run, not to mention the downtime, the work and frustration involved.Then there is the cosmetic presentation. Not always important to some but it's very important to me. If that's important to you then you'll greatly appreciate the gleaming mirror polished stainless steel and extra sharp details of the circuit board and the beautiful clear and bright tubes used here. This pair of amps will knock your eyes out.
They are so shiny in fact that it seems impossible to get good photos due to the highly reflective properties of the chassis and glass. Take a good close look at the reflective properties seen in the finish. Look at the quality of the soldering and component placement, the wiring.
I went to great lengths to build a pair of amps you will be proud to own and use for a lifetime, these are nice to be modest. OK, they're about as nice as they come honestly.
So go ahead and shop around and look closely at what your options are, look at the details, think about what it will cost to get it sounding good and working right........... Yep, you've just spent more on those than these, and they'll never look like these do no matter what. This isn't an "out of the box" pair of Dynaco MKIII, these are specially built and nicely assembled amps for that someone who want's a little more than the neighbor has.
Each amplifier is equipped with the Dynakit "bias balance control" feature. This permits equal biasing and then further balancing of the bias between the individual output tubes for enhanced sonics, extended tube life and higher overall reliability. Bias is coarsely adjusted first using the original 10k bias pots. Then the balance is adjusted, this is for equalizing the current between each pair of output tubes.These secondary balance adjustments are made using the additional balance pots and adjusters which are installed conveniently behind the front octal sockets. The adjuster is very discreet and is accessible at the center holes of the already existing front octal sockets. Full easy to follow bias setting instructions are included. These amps feature Upgraded Premium Dynakit 80/40/30/20uF multi section capacitors which are rated for 550V (600V surge) and use four discrete (individual) caps inside the metal can style enclosure. Each amplifier has a genuine Dynakit P-782 power transformer plus a an A-431 Output Transformer - The original (vintage) transformers are inarguably excellent, but they were designed to operate on 117 volts (think 1950's).
Today's household AC current is often near and occasionally higher then 125 volts, so the use of a "step down" or "bucking" transformer is necessary to reduce the voltage down to a safe operating level for any vintage amp having its original transformers. These modern Dynakit transformers are manufactured to work from standard, modern 120-125 volt household AC current. They operate cooler, produce less distortion and outperform vintage transformers in every category.
These transformers were reverse engineered from the original designs using many modern manufacturing technologies and superior insulations. These are super high quality USA made transformers that meet and exceed every aspect of the originals.If there were some sort of "magic" in cloth covered leads, Dynakit would have certainly insisted on using them. The truth is, there's simply no magic in cloth covered lead wire. There's nothing wrong with cloth leads, they were the the standard of the time, but in any comparison, these new transformers are better than those old originals. Modern advancements in materials, combined with traditional methods and better technologies used in the manufacturing has resulted in absolutely superb transformers that produce improved sonics and cleaner power.
These transformers provide less distortion and increased reliability. This is not a 50 year old amp and is not pretending to be one.This is a modern amp based on a ingenious and very successful 50+ year old proven design. An inrush current limiter is incorporated into the AC mains to gently apply power during initial start up.
Each MK III circuit board features a matched pair of CDE 942C series capacitors and a single Vishay 1839HQ series capacitor for superior sonic performance and ultimate reliability. The 942 series have polypropylene film and dual metallized electrodes for both self healing properties and high peak current carrying capability.
These are simply some of the best caps on the market at any price, they sound phenomenal. The smaller caps are Kemet MLCC type with NPO C0G dielectric and Cornell Dubilier dipped silver mica. The resistors are a mixture of tightly screened metal films and 5% carbon films for superb accuracy while retaining the warmth so desirable in tube amplification.
Brands are TE, PRP, Vishay, Yageo and Dale. The bias and power supply features KEMET's PEG124 electrolytic capacitors with very long life, rated up to 27,500 hours at +105°C with outstanding electrical performance. The capacitor has a polarized all-welded design, tinned copper wire leads, a negative pole connected to the case, and a plastic insulation. The caps have been further shielded to prevent grounding between the case and the chassis or other components.The leads are also insulated for safety. All of the wiring is 20 AWG USA made wire and is carefully and tastefully routed and secured in the chassis. All soldering was done with Kester 60/40 rosin core. The tube sockets on the PCB are high grade ceramic type for optimum heat shielding, these have gold plated contacts for corrosion resistance. Of course the amps have the Genuine Dynakit Shielded choke #C-354 for extra quiet operation. Upgraded with Gold Plated Banana Jack binding Posts and set up for 4 and 8 ohm output. Identically matched JJ KT88 Tubes, tested and analyzed using the ROE computer tube matching system - one of the best rated KT88 tubes on the market. Ordered brand new as a matched quad just for these amps. The other cool thing about these tubes is they are unmarked. Very clean and industrial looking tubes.
These tubes are hand selected and graded, a great find! The original MKIII amps came with KT88 tubes and some years later in production Dynaco began using the 6550 tube. These amps will run either tube with the only requirement being to reset the bias for those tubes. Test matched and sweet sounding pair of true NOS vintage RCA 6AN8A tubes with original boxes. (some photos may show GE tubes being used).New Tung-Sol 5AR4 / GZ34 rectifier tubes with their original boxes. 3 Prong Grounded Power Cord. Genuine Dynakit mirror Polished stainless steel chassis with the satin black covers and custom made solid aluminum labels. These amps were designed and built to be a true identically matched set. These are modern, brand new amps made to operate from standard (USA) 120-125 AC current. You do not need a voltage reducer to run these amps, just plug them in and go. These amps sound mesmerizing, the cleanest and most articulate soundstage I've heard from the Dynaco lineup. Driving a pair of horn loaded cabinets with 12 woofers these amps bring the room to life effortlessly. The vocals and strings are almost disturbing. I've explored every genre from jazz to classic rock and simply don't want to shut the amps off. The amps shown in the photos are the amps you are going to receive, nothing else in the photos is included but may be available in other listings if you're interested.
The sale is for the two MKIII amps, the tubes and the covers for the amps. Don't dilly-dally, lets get this done...........
Tubes will be removed and properly packaged inside each amps individual box. Includes - Manuals, diagrams, schematics and additional info all on a CD-ROM.
The item "Pair of Dynaco MKIII Monoblock Tube Amplifiers, Audiophile KT88 Brand New Build" is in sale since Tuesday, July 20, 2021. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps". The seller is "the_dynaco_show" and is located in Coweta, Oklahoma. This item can be shipped to United States.