Dynaco Dynakit Stereo 70 st70 ST-70 Tube Stereo Amplifier GOOD

Dynaco Dynakit Stereo 70 (ST-70) Tube Stereo Power Amplifier

Condition: GOOD
Original Box: Not included

Overview

The Dynaco Stereo 70 (ST-70) is one of the most iconic and widely respected tube power amplifiers ever produced. Originally sold as a Dynakit, the ST-70 has earned legendary status for its musicality, reliability, and simple yet brilliant circuit design. With over 350,000 units produced, it remains a benchmark in vintage tube amplification and a favorite among audiophiles, collectors, and tube enthusiasts.

Condition

• Overall condition: GOOD

• The amplifier shows cosmetic wear consistent with age, including light scratches, marks, and patina on the chassis

• Lettering and transformers remain clearly visible

• No original box included

• Unit is complete and intact

Sound Quality

The ST-70 is renowned for its:

• Warm, natural midrange

• Smooth, musical treble

• Excellent tube bloom and harmonic richness

• Surprisingly authoritative bass for its power rating

It pairs exceptionally well with efficient speakers and is highly regarded for vocals, jazz, classical, and acoustic music.

Key Specifications

• Power Output: 35 watts per channel (stereo)

• Amplifier Type: Vacuum tube stereo power amplifier

• Inputs: RCA stereo input

• Speaker Outputs: 4, 8, and 16 ohm taps

• Made in: USA

Notable Features

• Legendary Dynaco output transformers

• Simple, elegant circuit design

• Extremely upgradeable and serviceable platform

• One of the most modified and supported tube amplifiers ever made

• Strong collector and enthusiast demand

What’s Included

• Dynaco Dynakit Stereo 70 (ST-70) tube amplifier only

• No original box or packaging

Ideal For

• Vintage audio collectors

• Tube amplifier enthusiasts

• Audiophiles seeking classic tube sound

• DIY modifiers or restorers

• High-efficiency speaker systems

Summary

The Dynaco ST-70 remains a timeless classic and a cornerstone of tube audio history. Even decades later, it continues to deliver engaging, musical performance that rivals many modern tube amplifiers. This unit is offered in good condition, making it an excellent opportunity to own one of the most celebrated tube amplifiers ever produced.

We do take trade-ins, so please contact us if you wish to do so.

Please make sure to thoroughly inspect item photos for cosmetic condition.  We do try to describe the item as accurately as possible, so if you have any questions about cosmetic condition please message us.

3mA Audio Carries the following Brands:

• Acoustic Signature
• Acora
• Artnovion
• ATS Acoustics
• Audio Research
• AudioQuest
• Aurender
• Berkeley Audio Designs
• Boulder
• Bowers & Wilkins
• Chord
• Clearaudio
• Degritter
• Devialet
• DS Audio
• Fortress
• Hana
• Headamp
• HiFi Rose
• Innous
• Kaleidescape
• Kuzma
• Lansche
• Lyra
• madVR
• MBL
• Magico
• Marantz
• Mofi Electronics
• Nordost
• Perlisten
• Rega
• Rel Acoustics
• Solidsteel
• Stax
• Thrax
• Trinnov
• Ultrasonic Audio Racks
• YG Acoustic