Fully Serviced
All items are meticulously serviced and restored to meet factory specifications
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Dynaco
SCA 80Q Integrated Amplifier
Power output30W/ch into 8Ω (stereo), 30W/ch into 8Ω (quadraphonic)
Frequency response15Hz to 50kHz
Total harmonic distortion0.5%
Damping factor40
Input sensitivity3mV (MM), 130mV (line)
Signal to noise ratio60dB (MM), 80dB (line)
Channel separation50dB (line)
Speaker load impedance8Ω to 16Ω
Semiconductors20 transistors, 10 diodes
Dimensions13.5 x 4.25 x 10 inches
Weight16lbs
AF6 Stereo Tuner
TypeMono/Stereo Tuner
Tuning BandsFM, MW
Tuning ScaleAnalogue
Sensitivity1.75uV (FM), 50uV (MW)
Signal to Noise Ratio65dB (FM)
Distortion0.5% (FM), 2% (MW)
Selectivity65dB (FM), 20dB (MW)
Frequency response20Hz to 15kHz (FM)
Dimensions13.5 x 12 x 4.25 inches
Weight13lbs
While the two are often credited for creating the “Ultralinear” transformer, their work was an expansion of a circuit design by Alan Blumlein that never came to fruition. The secret to Blumlein’s clever design was to use taps from the output transformer to feed signal back into the output stage circuitry. The Acrosound transformer circuit quickly became a staple in the early 1950s for electronic hobbyists building their own amplifiers.
Following the success of their transformers, David Hafler began selling entire amplifiers as build-it-yourself kits—a rather novel idea for the time. This allowed the average audio enthusiast to follow a schematic, choose the power of their output transformer, select specific tubes and customize their own unique amp. What made Hafler’s idea different than the rest at the time was that his circuit boards came preassembled, freeing up a considerable amount of time for the purchaser. Allegedly due to differences of opinion over kit production, David and Herb went their separate ways in 1954.
During a visit to Brociner Electronics in New York, Hafler met Ed Laurent who was also designing power amplifiers at the time; they joined forces in 1955 as Dyna Company. Soon after incorporation, Dynaco announced the Mk. II 50-watt amplifier that came available as either a kit or preassembled. This sold for many years, superseded only by the soon-to-be-classic Mk, III 60-watt unit. As they gained momentum in the emerging hi-fi market, Dynaco relocated to a former chocolate factory with an old walk-in refrigerator that served as a well-isolated listening room.
Demand for Mk. II, Mk. III and PAM-1 preamp allowed the company to offer some new products: most notably the Dynaco Stereo 70. With the help of Bob Tucker, the ST-70 was designed in 1959 to reduce distortion and improve audio quality with four EL34 output tubes, a GZ34 rectifier tube, two 7199 input driver tubes, two ultralinear output transformers and a power transformer. At the time, solid-state amps were dominating the market and the ST-70 was available at a surprisingly affordable price. More than 350,000 ST-70 amplifiers had been sold when production finally ceased, making the ST 70 the most popular tube power amplifier ever made.
In the following years with Ed Laurent as Chief Engineer, Dynaco produced a multitude of hi-fi products including the FM-1 stereo tuner, the A-25 bookshelf loudspeakers, a range of solid-state amps and the Dynaquad integrated system matrix to create “4-dimensional” sound from stereo recordings. In the late 1970s, Dynaco released a short-lived set of new loudspeakers developed by Ed Laurent, the Phase III. 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. Dynaco was acquired by ESS Labs, LLC in 1979, and its assets acquired by Stereo Cost Cutters. The Dynaco division was closed in 1980.
SCA 80Q Integrated Amplifier
The Dynaco SCA-80Q is an all silicon solid state stereo control amplifier of exceptionally high quality. It functions as the control centre for all mono or stereo signal sources, such as a record player, radio tuner, tape recorder, television sound, etc., and provides output connections from two 30 watt power amplifiers for either two or four loudspeakers, as well as a front panel jack for stereo headphones. Thoughtful planning has provided exceptional flexibility with remarkable ease of operation. The SCA-80Q incorporates special circuitry which enables Dynaquad 4-dimensional playback for increased realism from a four speaker system without any additional electronics. Alternatively it may be used as a conventional two channel stereo amplifier with provision for optional connection of a second pair of speakers in a remote location.
AF6 Stereo Tuner
The Dynaco AF-6 is the culmination of years of Dynaco design research directed towards the goal of exemplary performance under a wide range of reception conditions, the high reproducibility which assures consistent results from kit-built units, all at modest cost. It provides a generous layout for easy assembly and outstanding serviceability. The primary consideration in the development of each new Dynaco product is exceptional performance; the AF-6 delivers this in full measure.
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There’s something undeniably magnetic about vintage audio gear. The tactile weight of milled aluminum knobs, the warm glow of dial lamps, and—above all—the rich, analog sound that today’s sterile streaming boxes can’t quite replicate. But time is merciless: capacitors dry out, switches oxidize, and those gorgeous walnut cabinets lose their sheen. That’s where the art (and science) of our vintage audio refurbishment comes in.
Why Vintage Audio Still Matters
In the golden era of hi-fi—roughly the mid-1960s through the early 1980s—companies like Marantz, McIntosh, Pioneer, Sansui, and Technics were engaged in an arms race of build quality. This was before cost-cutting plastics and disposable designs; amplifiers were over-engineered, receivers were works of art, and turntables were precision instruments.
Owning one wasn’t just about sound; it was about status and permanence. These machines were built to last a lifetime—or two. The irony? Decades later, they often do, provided they’re given the care they deserve.
The Philosophy of Refurbishment
Refurbishment is not just about fixing; it’s about preserving authenticity while ensuring reliability. The goal is to keep that lush, analog character alive without compromising safety or sound quality.
Some enthusiasts chase museum-level originality—keeping every factory component in place. Others opt for sympathetic modernization, upgrading parts that never existed in the ’70s to improve performance. Both approaches can be valid; it depends on your vision.
The Turntable Store refurbishing process.. step by step
Step 1: The Initial Encounter
When we first meet a 40-year-old amplifier, we resist the urge to plug it in right away. That dusty Marantz 2270 might look gorgeous, but old electrolytics and brittle insulation can short instantly under full voltage.
Instead:
Tip: A faint musty smell? That’s often the scent of old phenolic boards, not trouble. But a burnt smell? That’s trouble.
Step 2: Deep Cleaning & Control Detox
Dust is the enemy of good sound, that is why we clean the interior carefully with compressed air and a soft brush.
The real magic comes with switches and potentiometers. Over decades, oxidation builds up, causing scratchy controls and dropouts. A deep contact clean in each pot and switch, followed by vigorous cycling, often restores silky-smooth operation.
Step 3: Electrical Resurrection
This is where science meets art:
Step 4: Cosmetic Glory
Refinishing the walnut cabinet can transform a unit. We do use real wood oil or Danish oil, not polyurethane. We clean the glass dial carefully; those silkscreened letters are fragile.
Knobs? We polish with metal cleaner, but never use abrasives on anodized aluminum.
Faceplate lettering? We avoid harsh chemicals—just mild soap and a microfiber cloth.
Step 5: Calibration & Sonic Check
After the repair and cleaning, it’s time to dial in the performance:
When done right, the result is astonishing: a sound that breathes—liquid mids, velvet highs, and bass with a tactile presence that modern gear rarely matches.
Our promise for Audiophile-Level Results
Why It’s Worth It
The payoff isn’t just sonic—it’s emotional. Restoring a 1970s Marantz or Sansui is like bringing a classic car back to life. Every glowing dial lamp, every smooth rotation of a volume knob, connects you to an era when music mattered enough to build machines like this.
And when you drop the needle on your favorite record and hear that warm, enveloping sound, you’ll know: this wasn’t just a repair. It was a resurrection.
We have a 14-day return policy, which means you have 14 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at theturntablestore@gmail.com. Please note that returns will need to be sent to the following address:
The Turntable Store
45 Market Square
Manheim PA 17545
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at theturntablestore@gmail.com.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like turntable needles and custom products (such as special orders or personalized items). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at theturntablestore@gmail.com.
We ensure our customers have the best shopping experience
All items are meticulously serviced and restored to meet factory specifications
We pack with precision and ship in brand new, appropriately sized, boxes.
Be in the know with timely notifications on your order, starting from acceptance to tracking numbers, allowing you to stay connected with your purchase