Vintage Tube Amp

Dynaco Stereo 70 ST-70 Tube Amplifier – Classic Vintage High-Fidelity Power Amp. Stereo 70 (ST-70) is a legendary tube amplifier known for its high-fidelity sound, robust performance, and compact design. Featuring Dynaco Super-Fidelity A-470 output transformers and a patented circuit design, the ST-70 delivers exceptional tonal balance and dynamic response, whether used in stereo or bridged for monophonic 70-watt operation. Each channel operates independently, providing ample power for any efficiency of speaker system, while the low internal impedance ensures tight damping and precise control over your loudspeakers. Key Features & Highlights. Dual 35-watt channels (stereo) or paralleled 70-watt output (mono). High-quality A-470 output transformers for full-range, low-distortion performance. Designed to maintain exceptional fidelity under real-world loudspeaker loads. Dynamic transient response : reproduces percussive and piano notes with clarity, sharpness, and no muddiness. Compact yet robust construction, ideal for home stereo or studio use. This unit is previously used, shows light cosmetic wear consistent with age, and is fully functional, delivering the authentic sound and performance that made the ST-70 a classic. Whether you’re a vintage audio collector, a tube enthusiast, or a musician seeking warm, musical amplification, the Dynaco ST-70 remains a highly sought-after reference tube amplifier with unmatched character and tone. We’re not just sellers, we’re passionate musicians, gear aficionados, and seasoned professionals dedicated to the craft of making music. We take pride in our curated music collection. We love giving these vintage and rare pieces new life through maintenance and upkeep. Our goal is for these units to be at their optimal performance before going to their new homes. Every item you acquire from us undergoes a meticulous inspection process conducted by our team of enthusiasts, studio engineers, and live performers. With full-time technicians on staff, rest assured that each piece is thoroughly examined and tested before being professionally packed. Once your order is in transit, automatic tracking information is provided, allowing you to monitor its journey from our shop to your doorstep with ease. The units/items you see in our pictures are precisely what you’ll receive. Additionally, we offer custom modifications, within reason, to many of the guitars and products we sell, ensuring they perfectly suit your unique requirements. If, for any reason, you’re not completely satisfied, please reach out to us before leaving feedback. Your happiness is our priority, and we’re here to ensure your musical journey is nothing short of exceptional. We’re here to address any concerns and ensure you have a positive experience with Tone House.

A friend of mine passed away and this amp was given to me to sell. I have no idea about it. I don’t believe it is working. I haven’t plugged it in. The cage is in great shape with no rust. The chassis is in beautiful condition and should be brilliant when polished. I have included two 7199 tubes that could be helpful for a rebuild. The tubes are untested. They are shown in the photos. Included is the assembly manual. On the front cover is a history of the updates. They are in pencil and a little difficult to read. On the top of the cage is a piece of tape that appears to say: 7-19 L + R? I’m guessing this item needs to be re-tubed. They are inside the cage wrapped in paper. They are kind of grouped near the location from which they were pulled.

Dynaco A-470 ST-70 Vintage Output Transformers Pair for Tube Amplifier.

Vintage Eico ST-70 Stereo Integrated Tube Amp Amplifier, For Parts Or Repair.

THIS WAS FOUND AT AN ESTATE AND HAS NOT BEEN USED FOR YEARS. THE FEW TUBES I TOOK OUT WERE ORIGINAL EICO. ONE OF THE METAL TUBE COVERS DOES NOT SEEM TO FIT ON THE TUBE RIGHT BUT WILL BE INCLUDED WITH THE AMPLIFIER. IT IS AS SHOWN. PLEASE LOOK AT ALL PHOTOS AND ASK ANY QUESTIONS YOU MAY HAVE. REMEMBER THAT I SELL MOSTLY ANTIQUE AND VINTAGE ITEMS AND THAT THEY ARE MOSTLY LIKELY NOT BE PERFECT DO TO THE NATURE OF THEIR AGE. IF YOU HAVE A PROBLEM PLEASE CONTACT ME BEFORE LEAVING FEEDBACK.

DYNACO STEREO70 vacuum tube power amplifier. Can be used with 100V, but sound quality will be inferior. We recommend using 117V. Size: Width 330mm x Depth 240mm x Height 165mm. We accept return items up to 60 days after the item has arrived. International Buyers – Please Note.

As always, these amps are wonderful but too bad I’m limited in space so I can’t keep all the gear I find! See photos for physical condition of the outside and inside of the amp. FYI, the mono switch is noisy if engaged, and the power switch can cause a small pop if not flipped quickly. They both will eventually need to be replaced but I don’t have the time. Restoration included: HIGH quality F&T electrolytic caps; new coupling caps for the driver board; replaced the selenium rectifier with a diode, and added diodes prior to the rectifier tube for added power supply stability. Swapped out the 7199s with a pair of 6UA8s from Tube Depot back in June. Probably have 10 hours on them. Tubes are not guaranteed as I don’t have a tube tester. Tubes included are 4 mixed EL-34s, and 2 6UA8s, Tung Sol GZ34. Here’s video of the actual unit in my system. Photos demonstrate the physical condition. I’m in Palm Springs, CA 92262.

Vintage Dynaco Dynakit Stereo 70 ST-70 Amplifier Tube Amp & Cage – Mullard Tubes. Fully tested and 100% functional; this amp will provide that nice warm tube sound to your home stereo system. Tubes are all excellent. The tube complement is all Mullard – 4 x EL34, 2 x ECF82 and 1 x GZ34. The speaker posts were upgraded by the original owner to banana jacks (the right jacks exhibit some wear but nothing that affects performance). In upgrading the jacks, the 16 ohm output has been disabled. The RCAs look to have also been upgraded. Cosmetically, it is overall very good exhibiting only normal wear from over the years. Includes original cage (one screw for the cage does not match). Also includes a copy of the manual/schematic.

Rectifier Tube replaced with Solid state device hence there is no tube in the socket. New Output tubes- Ruby tubes -2 matched sets. Bias set to 1.56 volts. All caps on board have been replaced (See Picture). New Power supply Multi cap. Replaced parts are shown in the pictures. We are a reputable Stereo Store with 45 years experience. Professionally Serviced, Cleaned and Tested by our Technicians. World Class packaging guaranteed to arrive as shown in the pictures. Lower 48 States only Please.

Vintage Dynaco Dynakit Stereo 70 ST-70 Amplifier Tube Amp & Cage – Mullard Tubes. Fully tested and 100% functional; this classic will add that warm tubey goodness to any home stereo hi-fi set up. Tubes are all excellent. The tube complement is all Mullard – 4 x EL34, 2 x ECF82 and 1 x GZ34. The speaker posts were upgraded by the original owner to banana jacks. In doing so the 16 ohm output has been disabled. The RCAs look to have also been upgraded. Cosmetically, it is overall very good exhibiting only normal wear from over the years. Includes original cage (one screw for the cage does not match). Also includes a copy of the manual/schematic.