Amp/Preamp Asylum

Looking for a new Amp or Preamp? If you're after tubes, post over here.

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: Does the amp "see" the subwoofer?

Posted by Dave_K on March 4, 2017 at 04:41:18:
If its a passive sub, the amp is powering the subwoofer, so of course it sees it as a load.

If it's an active sub with a high level crossover, and you are running the main speakers through its high pass filter, then the amp sees a different load from the main speakers due to the high pass filter.

If you're running the main speakers full range, and you run an extra pair of cables to the high level inputs of an active subwoofer (ala Rel) the amp doesn't really notice the sub. There's a teensy bit more capacitance from the extra cables, but it's miniscule compared to the load of the speakers.