Two Listening Circuits for now
Hi Ian
I had wanted to limit my participaton in this thread to the creative use & application of capacitors ( in all their different types ) . I'm pretty sure that I'm on record somewhere in the forum as agreeing that class A biasing of an electronic circuit will offer a purer sound to the end user.
Having said that; I'm in the business of getting paid to massage sound signals , ultimately for the consumption and audition of others. So because my living is dependant on the audio for video market, I confine most of my listening to circuits that I feel are representative of this ilk. That drives my choice of the Mackie 1202 mixer as a preamp. It's circuit is ubiquitous to my business, whether I like it or not. This circuit type represents about 65% of my listening time. And it requires a particular approach for capacitance filtering . This is also a portion of the playback chain that has wowed certain friends/peers of mine who own a lot of class A products ( within their personal touring racks ).
The second circuit that I listen to; is with the 1202 bypassed - with my Denon CD player directly feeding my first generation Behringer 2way cross-over ( again chosen for the ubiquitous nature of its' circuitry ). This more direct approach again has specific filtering needs. This circuit is faster ( as you can imagine ) and really underscores that fact that my present ratio of metal to paper is way out of whack. For this quasi 2way MTM system to seem at least halfway voiced - capacitors that slow down certain octaves are required. This exaggerated ratio ( metal to paper ) is in place for a purpose- simply put it - it helps when listening to a capacitors' specific sonic signature. But honestly, it is a voicing thats' near impossible to really make work ( though removing a lot of Polypropylene from the filtering combination helps ). The le14 sounds like a real loafer when mated with a 2441 sitting directly on top of it. The faster 1400nd mated to the 435be seems to be JBLs' choice of sonic marriages. I'm on record in other threads as stating that the 3" diaphragm is a better fit - from a voicing point of view. I use an Altec 288 when I get fatigued of all this horse play.
I appreciate your advocacy of the class "A" bias ( its' the same sort of advocacy that has led to my huge collection of aquaplased le10s & le14s ) - but at this time that circuit migration doesn't serve my purposes.
And so, now it's back to massaging sound . :yes: :spin:
regards <> Earl K :)
Just starting this journey
Hi Scott
Quote:
I just thought you, being the cap guru, might have had some info on them!
Thanks but :rotfl: you're confusing me with someone else . Really this is all at the instigation of Robert G / plus I also credit/blame him for my huge supply of white-coned le( 10s & 14s ). My collection of caps is now beyond a couple of hundred and climbing. All are generic types like Philips, Seimens, RC, Mallory, F-DYNE, Suncap, & some unkown types . Great fun !!!
- It's a little like asking my opinion about being a steamboat captain on the Mississippi , while I'm in "midfroth" on some wild "white-water" rafting holiday ( or something ). Yes I'm wet (all) but that's the extent of it .:spin:
I just happen to be taking this exploratory journey right now. Mucking about ( tweaking) inside active components and their power supplies will have to wait for another year.
regards <> Earl K