Schmilsson
Well-known member
A stupid question perhaps, but can the passive bits of a pultec(sans tube stage) be driven by say 436. Since the latter has crazy gain I mean, and can even be used as a mic pre. Also has 10K(or is it 15K?) input.
eskimo said:A stupid question perhaps, but can the passive bits of a pultec(sans tube stage) be driven by say 436. Since the latter has crazy gain I mean, and can even be used as a mic pre. Also has 10K(or is it 15K?) input.
abechap024 said:He should just be able to slap a 600ohm terminating resistor on the output of the pultec circuit and then wire it straight into the 436 without too much trouble.
Kingston said:The response will be completely out of wack like that. A lot of bandwidth lost, gain too, quite unnecessarily. You don't just slap a resistor at random on a passive filter network output.
eskimo said:Nevermind the previous idea, I think I'll build a buffer amp anyway. I'm interested though in alternatives to the pultec, a bit simpler if you will. Something like a baxandall, cut/boost shelf highs and lows(perhaps switchable bell-shelf) and a cut/boost mid with some frequency alternatives. The NYD went secret I suppose, so no info there.
Plenty of simple bass + treble design. I'm thinking passive, but wouldn't mind looking at some active ones either.
Oh, and I'm talking tube design.
What are there?
eskimo said:a bit simpler if you will. Something like a baxandall, cut/boost shelf highs and lows(perhaps switchable bell-shelf) and a cut/boost mid with some frequency alternatives.
Kingston said:eskimo said:a bit simpler if you will. Something like a baxandall, cut/boost shelf highs and lows(perhaps switchable bell-shelf) and a cut/boost mid with some frequency alternatives.
That's not simpler than the standard pultec EQP1 network. It's actually nearly double the complexity with the mid band cut and boost. More than double the cost with all the added inductors. Much more make up gain needed. Much more attention needed for layout.
There's an overload of material in the passive EQ META thread. Time to start reading.
If you want simple, don't do it passive.
This circuit is called a Baxendall, after the name of its inventor. The basic circuit existed before, but he was the first to include it in a feedback loop, which solved a number of problems.eskimo said:I found this active circuit, which might be fun to try out, no selectable mids though.