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

Limiting low frequency response of SE amp

Posted by Randal P on February 4, 2017 at 06:13:10:
I have a single ended amp (Dennis Had Inspire, single ended 6V6). I wish to use this to power the high frequency section of my Altec two way (414A, 802D). I would like to roll the amp off at 6dB/octave below 6khz or 8khz or so at 6dB/octave.

One option is the simply insert a capacitor inline with the input, but I think I would need to know the input impedance to calculate the value. Another option might be to select a smaller coupling capacitor value to limit LF response.

Any suggestions?