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Dynaco 410 st amplifiers

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Dynaco 410 st amplifiers

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Vintage Dynaco Stereo 410 Power Amplifier


Founded by David Hafler and Ed Laurent in Philadelphia, Pennsylvania in , Dynaco was an American hi-fi audio system manufacturer popular in the s and s for its wide range of affordable, yet high quality audio components.. They also manufactured other tube and solid state amplifiers, preamplifiers, radio tuners and bookshelf loudspeakers. Dynaco was liquidated in , and the trademark is now owned by Radial Engineering Ltd.

In David Hafler and Herb Keroes started a Philadelphia-based company called Acrosound to build and sell audio-quality output transformers, primarily for home electronics hobbyists. In Dave Hafler and Herb Keroes parted company. II watt power amplifier. II was sold for several years until its replacement in by the Mk. III amplifier, which produced 60 watts.

II and Mk. Today, Dynaco is best remembered for its highly regarded vacuum tube stereo amplifier, the Stereo 70 ST Introduced in , the ST 70 was available as a kit Dynakit intended for assembly by the purchaser or as a complete factory-wired unit. It produced 35 watts per channel. The output transformers are an ultralinear design, whereby part of the primary winding is fed back to the output tube's screen grid.

This design reduced distortion and improved audio quality. A masterpiece of efficient circuit design, the ST 70 provided reliable, high-quality audio amplification at an affordable price. The popularity of the ST 70 contributed more than any other single product to continuing consumer interest in tube-based stereo amplifiers at a time of increasing market dominance by solid state audio products.

Because of its excellent value for cost, Dynaco tube amplifiers were often referred to as "the poor man's McIntosh. A smaller tube amplifier, the Even today, upgraded components, rebuilding kits, and complete tube amplifiers using the basic Stereo 70 design are still in production, and the ST 70 has inspired numerous other amplifier designs, such as Ars-Sonum's Filarmonia SE.

Dynaco continued to build both mono and stereo amplifiers until The company's final contribution to vacuum tube technology was the massive Mk. VI mono power amplifier of , which produced watts continuous. In later years, the company began to produce a line of solid-state audio components, commencing in with the introduction of the Stereo power amplifier 60 wpc.

Because of early problems involving circuit, power supply, and transistor failures, the ST was not as popular as earlier Dynaco tube amplifiers. Numerous small circuit changes were introduced by Dynaco over the years in an attempt to improve the stability and reliability of the ST , without much success. With the PAT-4 preamplifier in , the company affirmed its ability to design reliable solid state equipment at an affordable price. In the Dynaquad 4-channel matrix decoder system was introduced, helping to start the quadrophonic sound craze.

In the s, the Stereo was developed and marketed. This was a high power amplifier at watts per channel that offered automatic protection circuitry to prevent electrical destruction of the loudspeaker. Dynaco's solid-state kits were different from the popular Heathkit products and Dynaco's own vacuum tube kits because of their preassembled circuit boards. These boards were wired at the factory, tested and packaged with the unassembled chassis.

It remained only for the consumer to attach the switches and controls to the chassis pieces, assemble the chassis and power supply, and solder connecting wires to the circuit boards.

This saved considerable time and reduced error in assembly. The A-Series were marketed between from until Dynaco's demise in the s. The Dynaco A model proved to be extremely successful, selling between , and 1,, units. The patented aperiodic essentially non-resonant woofer design utilized a highly damped vent instead of a reflex port, whose acoustic resistance is very carefully controlled.

The resistant venting action lowered the "Q" of the system and reduced impedance variation near resonance in the A-Series speakers.

Dynaco followed the A with the slightly larger A , which featured a dual-chambered, non-vented design in a walnut-veneered cabinet with even greater transparency and fidelity. Over time, Dynaco marketed a wide range of loudspeakers, ranging from the small A model to the floor standing A series. After some 30 years, these loudspeakers still command good prices in markets such as eBay , and are a testimonial to their quality. Concurrent with A production, Dynaco introduced the QD-1 speaker adapter which synthesized 4-channel sound from the stereo amplifier output.

This "Dynaco patent" required a single resistor and a threeway potentiometer for the two rear speakers, generating phase difference signals for a feeling of ambience. The system worked best when the stereo sound had been recorded via two bidirectional microphones on the same spot. When microphone set-up changed to the use of multiple directional microphones and multitrack tape recording and postprocessing i. Dynaco became a wholly owned subsidiary of Tyco, Inc. David Hafler remained with the company a few years longer, but left in to join Ortofon, manufacturer and importer of high-end phono cartridges.

In , Hafler founded the Hafler Company, continuing the tradition of high quality but inexpensive kits and assembled hi-fi gear. The speakers were well regarded by the audiophile community, but their introduction was apparently too late to make any strong impression in the marketplace, and Ed Laurent left shortly afterward to join SEAS Corporation. In the Pan Orient Corporation later Panor Corporation acquired the Dynaco trademark, and in began marketing electronic audio components with the Dynaco brand.

Panor introduced some new products, such as the Stereo 70 II. While Panor owns the Dynaco brand name and trademark, there is no longer any direct connection with the company founded by David Hafler.

Dynaco introduced tube audio amplifiers , tuners, and preamplifiers between and From Wikipedia, the free encyclopedia. Categories : Audio amplifier manufacturers Audio equipment manufacturers of the United States Electronics companies established in Electronic kit manufacturers Loudspeaker manufacturers Electronics companies disestablished in establishments in Pennsylvania disestablishments in Pennsylvania. Hidden categories: All articles with dead external links Articles with dead external links from December All articles with unsourced statements Articles with unsourced statements from October Namespaces Article Talk.

Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file. Download as PDF Printable version. Svenska Edit links. Dynaco Mark II. Dynaco PAM Dynaco Mark III. Dynaco Stereo Dynaco PAS Dynaco Mark IV. Dynaco FM Dynaco SCA Dynaco PAS-3X. Dynaco Mark VI.


DYNACO STEREO 410 SERIES 2 CHANNEL POWER AMP 440W

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DYNACO STEREO SERIES 2 CHANNEL POWER AMP W - Kaptain Kirk's Auction and Appraisals.

Dynaco ST-410


Please enable JavaScript on your browser to best view this site. David Hafler and Ed Laurent founded the Dyna Company later Dynaco with the intention of not only producing transformers, but high-quality audio circuitry. The company was incorporated in Octoberwith business premises located at N. II watt power amplifier. Available as a kit or preassembled unit, the Mk. II was sold for several years until its replacement in by the Mk. III amplifier, which produced 60 watts. Dynaco continued to build both mono and stereo amplifiers until VI mono power amplifier ofwhich produced watts continuous. Dynaco is best remembered for its highly regarded vacuum tube stereo amplifier, the Stereo 70 ST Introduced inthe ST was available as a kit Dynakit intended for assembly by the purchaser or as a complete factory-wired unit Dynaco.

Dynaco Kits

dynaco 410 st amplifiers

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I am not an expert on amps and I haven't found too many reviews of this amp.

Dynaco ST-410 ....... OMG !!!


Need support, you got it. Or share your ideas and experiences. Dynaco-Doctor Forum Welcome! Return to Dynaco-Doctor Forum. Dynaco amplifier problems,

Sansui amp parts

Read times. OK to leave dynaco on all the time?? Pages: [ 1 ] Go Down. Just wondering if it would be all right to leave my dynaco powered on all the time.. Well, its part of my garage system so doenst get used very often. When I have turned it on, last times its blown both speaker fuses.

Dynaco Stereo Stereo Power Amplifier Manual HiFi Engine. Fisher EV TUBE AMP Dynaco Stereo / ST Amplifier Service Manual.

Opinions on the Dynaco 400 series solid-state amps (410, 416, etc)

Have any of you ever listen to or seen this SS amp? It is supposed to be watts per channel. If you have what are your thoughts?

Dynaco St 410 Manual Dexterity


If I remember correctly there was a phase 2 Dynaco ST, I have no information on why there was this added model designation. It may have been an internal doc. It was posted there around You can print out the article. A set of 8 pages has been deleted there that would have created a watt mono amplifier. No explanation posted.

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