Dynaco Stereo 120 - Manual - Stereo Power Amplifier - HiFi Engine.pdf

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12/17/2019
Dynaco Stereo 120 - Manual - Stereo Power Amplifier - HiFi Engine
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Dynaco Stereo 120
Stereo Power Amplifier (1971-72)
(https://www.hifiengine.com/add-a-review.php?nid=16612)
(3 reviews)
(https://www.hifiengine.com/add-a-
review.php?nid=16612)
(https://www.hifiengine.com/images/model/dynaco_stereo_120_power_amplifier.jpg)
Description
The Dynaco Stereo 120 is an all silicon transistor basic power amplifier for use with separate
preamplifiers such as the Dynaco PAT-4 or PAT-5, or for use with tape recorders or tuners such as
the FM-5 or AF-6, which have their own volume controls.
The unit contains two 60 watt amplifiers on one chassis with a common power supply.
Although the Stereo 120 is a solid state device, containing transistors and similar semiconductors,
it has been designed to be used under normal conditions without special safety precautions, just as
if it were a high grade tube amplifier.
Thus it can be connected to source and speaker components and used with confidence in all conventional arrangements.
There are no circuit breakers, speaker fuses, or other resettable devices to impede the use of the Stereo 120 under any
reasonable conditions of use or abuse.
This is achieved by using novel circuits (on which patents are pending) which automatically and instantly protect the
amplifier.
Specifications
Power output: 60 watts per channel into 8Ω (stereo)
Frequency response: 5Hz to 100kHz
Total harmonic distortion: 0.5%
Damping factor: 40
Input sensitivity: 1.5V
Signal to noise ratio: 95dB
Speaker load impedance: 4Ω to 16Ω
Semiconductors: 15 x transistors, 15 x diodes
Dimensions: 13 x 10.5 x 4 inches
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Dynaco Stereo 120 - Manual - Stereo Power Amplifier - HiFi Engine
Weight: 20lbs
Downloads
instruction/owners manual
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(https://www.hifiengine.com/hfe_downloads/index.php?dynaco/dynaco_stereo-120.pdf)
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Reviews
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Reviewed Mar 24th, 2019 by
vglory88
(https://www.hifiengine.com/users/vglory88)
Classic amp, capacitor coupled, same as Sony TA-1120 and Marantz 1060, for extra sweetness and smoothness. Has
beautiful tube-like sound.
Reviewed May 10th, 2016 by
Peter Wieck
(https://www.hifiengine.com/users/peter-wieck)
By the time I am done with one of these beasts, it would be a healthy 9. As found typically, seldom above a 4. One I
found today would be a 4 cosmetically, and a 0 electronically as there was a 1/4 x 1/8 inch hole burnt through the power-
supply board - not atypical.
Reviewed Feb 10th, 2014 by
Evman
(https://www.hifiengine.com/users/evman)
Nice sounding amp. Get them cheap on EBay. VanAlstine web site has upgrades to power supply and other things. Very
cheap to do. I promise you won't be disappointed.
Comments
Re: Stereo 120
(/Manual_library/Dynaco/Stereo-120.Shtml#Comment-13274)
Submitted by
guy48065
(https://www.hifiengine.com/users/guy48065)
on October 22nd, 2015.
It's worth noting that the Stereo 120 amp is a single-ended design with a 72V power supply rail. That puts the output
floating at 36V so a large electrolytic capacitor is needed to block this DC voltage from harming your speakers. Yes
dear audiophiles--all the sound passes through an evil electrolytic capacitor!
https://www.hifiengine.com/manual_library/dynaco/stereo-120.shtml
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Dynaco Stereo 120 - Manual - Stereo Power Amplifier - HiFi Engine
Re: Stereo 120
(/Manual_library/Dynaco/Stereo-120.Shtml#Comment-9823)
Submitted by
billyd52
(https://www.hifiengine.com/users/billyd52)
on March 28th, 2014.
A great vintage workhorse amplifier for the money!
This website is not affiliated with or sponsored by Dynaco. To purchase Stereo 120 spares or accessories, please contact
the company via their website or visit an authorised retailer.
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