Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.
You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

RE: trading boatloads of feedback for non-inverting preamp section?

Posted by cpotl on June 17, 2017 at 07:13:12:
"Why don't you just flip your speaker wires?"

Indeed, the obvious solution would seem to be just to switch over the speaker wires, if you are unhappy with the phase that a given amplifier is feeding to the speakers. The speakers are, after all, the most likely source of asymmetric distortion.

The only reason I can imagine for wanting to maintain a specific phase earlier in the chain is if you suspect that your power amplifier has a substantial asymmetric distortion, and thus you want to feed it with a particular phase from the preamp. (Though why you would suspect that the signal from the preamp, or indeed the music source you are using has a preferred phase I am not quite sure.)

I suppose an SET amp may have high enough asymmetric distortion that the issue of the phasing of the signal it is fed might be of concern. But really, if you are using an amplifier that injects such a degree of distortion, then you are not really in the realm of hi-fi sound reproduction.