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McIntosh and Autoformers. - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/mcintosh-and-autoformers
What a difference, my understanding from discussions with McIntosh is that the Autoformer uses three "tap in" areas of the output transformer. This permits Mc to produce an amp that is a consistant 350 watts at 2-4-or 8 ohms.
McIntosh Autoformers (They work suprisingly well)
https://www.audiocircle.com/index.php?topic=137964.0
McIntosh autoformers continued to be used in the "top-of-the-line" amplifiers. They were all designed and manufactured by McIntosh. Although the autoformers added extra cost, weight and took up extra space, they assured a safe, optimum match to a variety of speakers and speaker hook-ups.
Mcintosh autoformers..... - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/mcintosh-autoformers
Mcintosh still makes amplifiers with an autoformer ouput. Eg. MC402, MC252, and just about every other model they make. I believe that in the history of Mcintosh there were few models that did not have autoformer outputs.
Mcintosh Autoformers - How Do They Affect The Sound?
https://rec.audio.high-end.narkive.com/x0Km7sSA/mcintosh-autoformers-how-do-they-affect-the-sound
The downside. of the McIntosh ouput transformer is that quite a bit of "extra" voltage. swing is typically required since the gain of the output stage is, iirc, 2 - as opposed to much higher gains in the typical plate loaded output. stage. The McIntosh "Autoformers" were created at a time when transistors had.
McIntosh Autoformers - 2-Channel Home Audio - The Klipsch ...
https://community.klipsch.com/index.php?/topic/198170-mcintosh-autoformers/
I use an MC7106 bridged to 320wpc, but curious what kind of leap i'd make to a traditional mac amp with the autoformer and if even lower 150-200wpc would sound fuller and more authoritative than the non autoformer mac amps bridged to more wpc. The leap is about 50-75 pounds. Cap or autoformers both there to block DC from cooking your speakers.
McIntosh readies MA9500, MA8950 integrated ... - darko.audio
https://darko.audio/2022/02/mcintosh-readies-ma9500-ma8950-integrated-amplifiers/
The MA8950 gives us 200wpc into 2, 4 or 8 Ohms. This load invariance is attributable to the deployment of McIntosh’s in-house designed Autoformers. On analogue inputs, we get nine: balanced (1), unbalanced (6) plus one MM phono and one MC phono, the latter with adjustable loading. The flexibility continues with a five-band EQ for ±12dB (in ...
McIntosh MA8950 Integrated Amplifier
https://www.mcintoshlabs.com/products/integrated-amplifiers/MA8950
The MA8950's 200 Watts per channel are delivered by a pair of the famous McIntosh Autoformer ™ and is enough power to properly drive virtually all loudspeakers. The unique design of the Autoformer guarantees your speakers will always receive the full 200 Watts regardless if they have 2, 4 or 8 Ohm impedance.
McIntosh transformers – PS Audio
https://www.psaudio.com/pauls-posts/mcintosh-transformers/
Just curious. Since I believe McIntosh uses autoformers, multi-tapped inductors not true transformers does this make any difference? And I know that transformer coupling results in high output impedance but the only person I know who deliberately tried to have the output impedance of his amp match speaker impedance was David Berning who was looking …
McIntosh - Frequently Asked Questions
https://www.mcintoshlabs.com/support/faq
The McIntosh Output Autoformer is a special transformer that is designed and manufactured in-house by McIntosh. This allows any speaker type to be used with a McIntosh amplifier and have all of the power that the amp is designed to deliver. All other amplifier designs will not have even power with differing speaker designs.
McIntosh Laboratory Part 1 - Roger Russell, McIntosh Lab ...
http://roger-russell.com/mcintosh1.htm
The unique McIntosh output autoformer was the answer. Since McIntosh output stages were connected in a single ended push-pull circuit, one side of the output was always connected to ground. They were typically designed to work into an optimum load of 2.1 ohms. The matching autoformer was connected directly to the output.
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