Boswell
Hi Bos.. ;)
I was wondering if perhaps you could help me to more easily understand what a "Zobel Network" is.
I've noticed this term mentioned in reading more about the ISA One mic preamp; and I've honestly tried to learn about this by reading various articles on line, and, well, I'm not getting it.
I'm a bit embarrassed to admit that what I've read thus far is over my head... Yea, I know, I should be able to grasp the info, but I'm just not understanding what I'm reading.
I thought I'd ask you, because you always have such a great way of explaining these types of things, and beyond being beneficial to me, it may also be valuable info for other RO members, or those who may be doing a search on the topic...
Thanks pal. :)
-d.
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A Zobel network was applied to telecom circuits in an attempt to
A Zobel network was applied to telecom circuits in an attempt to flatten the passband of a line at the expense of needing more gain at the repeaters or at the terminal equipment. It was not so much needed for speech traffic but when a standard line was used for music or other content that required relatively flat bandwidth.
Zobel networks can also be used to give a more resistive input impedance, which I think is the aim in this case. It helps the input be less sensitive to signal cable characteristics and length as well as giving greater bandwidth. It's also the sort of term that's seized on by marketing copywriters to add a helping of mystique and exclusivity to an otherwise everyday operation.
If it matters, here's what started me on this knowledge-seeking
If it matters, here's what started me on this knowledge-seeking journey; a phrase/excerpt from a review of the ISA:
"Its Lundahl L1538 transformer combined with a bespoke zobel network and massive frequency bandwidth results in a mic pre that's both transparent and warm..."
source: http://www.musicradar.com/reviews/tech/focusrite-isa-one-mic-pre-166612