John Curl's Blowtorch preamplifier part III

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By the way, nice album :)

George
 

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Oh you can. It's all about what you believe is important. This year my belief is that one should not compromise digital playback to support analog. Therefore I eschew the concept of an analog preamp and go digital into my mindsp digital crossover. Whilst i continue to believe this is the lowest compromise for my budget it will sound divine. Richard Burwen aside most audio systems involve huge compromises so why not roll with it :).

I didn't understand a single world but I'm on Richard Burwen side, whoever he is :happy1:
 
No way I would go through junk data converters for processing at 48kHz and call it good, but that's just me.
however sound quality still varies some with incoming jitter
Because you heard a difference in your usual subjective auditioning session? You aren't alone. Others have reported such findings too, including myself.
 
Precision, adjustability, accounting for different driver characteristics. All a gigantic pain in the passive world. With drivers being what +/-10% , caps being 5% at best unless you pay $$$$ for them in the sizes what hope do you have?
All good argues. This said, for an analog guy, not so complicated. We can adjust easily the (AUR) coils to fulfill precise enough filters.
On my side, i find digital is often a pain for DIYers (IE members of the poor guys hall of fame).
 
This said, for an analog guy, not so complicated.


Speaker crossover filters are a extremely complicated issue, for many reasons, starting with speakers impedance, nonlinearities and ending with interactions of the FR with the speaker enclosure. Fine tuning a crossover filter is 99% a trial and error job, which is time consuming and expensive. The end result is almost always a compromise, not necessary an optimum one. A DSP is a much simpler, precise and cheaper approach.
 
@billshurv,

I remember different experiments back in the old days (means ~1985 -1996) where passive multi-way systems were transformed into active ones.
If the frequency response of the passive version was the target for the activated system, the overall difference was remarkable small (no formal controlled listening test,though).

Same loudspeaker was used, passive crossovers and active electronics in seperate housings.
As it was a quite expensive sytem already in the passive version, parts for the passive crossovers were already carefully selected.

But, of course using digital equilization allows a lot more .....
 
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