how do inductors influence tone in EQ circuit?

seavote · Jul 11, 2010

i am currently sourcing components for a "franks" enhanced pultec and mid pultec EQ circuit.
i'd like to understand how the interaction between inductor and cap work to make up an EQ circuit.
explanations and/or links welcome
thanks

PRR · Jul 12, 2010

Coil impedance rises with frequency.

Cap impedance falls with frequency.

Playing one against the other, you can slant response any way you want.

damnyankee · Jul 12, 2010

I guess my question is, do inductors have any effect on the sound at all?

abechap024 · Jul 12, 2010

Inductors do effect the sound. They can saturate like a transformer does. Also for Eq they tend to sound much more "natural"/ Better

boji · Jul 12, 2010

PRR Wrote:
Coil impedance rises with frequency.
Cap impedance falls with frequency.

Would anyone mind elaborating a little on this? Thank you!

shabtek · Jul 12, 2010

http://home.online.no/~jaeioluf/sound/eqpassiv.htm

boji · Jul 12, 2010

TUVM!

JTraverse · Jul 12, 2010

The webpage shabtek provided is a good source of EQ theory. Look at reactance for the effects on EQ circuits. I don't think they add as much character to the sound as much as an output transformer for instance, nor are they isolated.

seavote · Jul 12, 2010

thanks. PRR, concise to the point and easily understood. thread could have ended there!
then shabteks link filled in all details. here's the releent section:

http://home.online.no/~jaeioluf/sound/eqpassiv.htm#SLC

man that was easy. usually my questions yeild large convoluted, technical answers i cant fully understand.

emrr · Jul 13, 2010

I've been plotting results from a Pultec mid eq, with variations. The results of the slanting may help the understanding.

http://www.groupdiy.com/index.php?topic=27964.msg494342#msg494342

PRR · Jul 15, 2010

> link filled in all details. here's the releent section:

That page does not show "load". Many of those circuits, such as this....

....would do "nothing" if they could be totally UN-loaded.

how do inductors influence tone in EQ circuit?

Help Support GroupDIY Audio Forum:

seavote

Well-known member

PRR

Well-known member

damnyankee

Well-known member

abechap024

Well-known member

boji

Well-known member

shabtek

Well-known member

boji

Well-known member

JTraverse

Member

seavote

Well-known member

emrr

Well-known member

PRR

Well-known member

Similar threads

Latest posts

how do inductors influence tone in EQ circuit?

Help Support GroupDIY Audio Forum:

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Member

Well-known member

Well-known member

Well-known member

Similar threads

Join the conversation!

Join today and get all the highlights of this community direct to your inbox. It's FREE!