John Curl's Blowtorch preamplifier part II

Status
Not open for further replies.
It sounds like a bunch of dinosaurs waiting for the end, extinction of the audio market. I think that you just need to open your eyes and look at this with a new vision or that is where you will end up. No we aren't going to see the return of large console audio systems or even large component systems but that should be looked at as both progress and an opportunity. From what I see, and I have raised four kids now who are all between 20 and 25 this generation listens to music just as much as we ever did only they have been exposed through a new medium, we just need to figure out how to tap into that market. go look at how many kids are buying $500.00 Dr. Dre headphones, they are horrid, but they are spending the money, so someone who could make a decent headphone and knows how to market to that demographic has a huge market. The music business is not dead, it is evolving and that is what you have to do or just wait for the end or your species. I plan on taping that market, I am working on that I just keep it to myself. Change or perish, it is your own choice.

The reality is even the high end is still worth a very large chunk of change, just not what it once was and it will either evolve or disappear as we knew it, but the music will go on and being able to play it back will not go away.
 
Joachim,
I know you haven't stopped working yourself, but at the same time so many say the industry is dead or dying, I don't agree. It is just changing, I'm not on the electronics side or I would be putting a lot of effort into class D amplification, that seems to be an area that needs more than a couple of good designers working. Seems crazy but vinyl album sales have been on the way up, not down like so many seem to want to believe though it is only a small portion of the market for music. I'll keep working on speakers, just not going to be large horns or large enclosures, doesn't mean I don't have any or don't appreciate them, it just isn't where the majority of the market is these days.

Glad to know you are still in the game Joachim, I wouldn't expect anything else.
 
The reality is even the high end is still worth a very large chunk of change, just not what it once was and it will either evolve or disappear as we knew it, but the music will go on and being able to play it back will not go away.
The marvellous thing is that all the music has been 'trapped', archived - it only needs the right mechanism to unleash it, at the moment it's again a bit like the 60's when the vast majority of LP playback was relatively crude, only a vague imitation of what was captured could be recovered by much of the gear that was generally available ...
 
Last edited:
John, i would NEVER open up a piece of equipment that you build until it breaks...

I have never opened my unit up (which is virtually identical) either. Nor will I, until it is necessary.

Hmm, first thing I do whenever I get any piece of equipment, highish end, low end, new, used, dumpster dive ... is pop it open and take some pics. 😕

That way I can just look at the pics instead of having to open it up (if it's in the rack or tucked in a closet somewhere) or search the net to see what chips are in it, how the caps look, what the layout's like, etc... :cheers:
 
Sneak peek of the CTC Blowtorch with Vendetta.
 

Attachments

  • ctc blowtorch open[1]-2.jpg
    ctc blowtorch open[1]-2.jpg
    99 KB · Views: 244
This is how it looks inside.
One last thing before i go to bed.
It is the size and the shape of the soundstage ( i can hear things OVER my head and 30 m DEEP, away from me ( tiny but focussed ) ), it sounds very wide but still focussed. It is BIG but SMALL the same time.
And the liquidity and airynesss that makes the Blowtorch so " exceptional ".
I am not the judge. The effect is undouptless real though.
It may even not be the circuitry but execution. Grounding, shielding and such.
It´s adictive when you have a sensor for that particalar drug.
Do you really think that an Opamp stage for 10,- $ can do it ?
Dream on. AND IT HAS NOTHING TO DO WITH THE DISTORTION MEASUREMENTS.
I can not measure distortion in an LME49710 when the gain is less then x 7.
Even with my new jig. That red hering is from the table.
Why such a stage sounds like a joke compared to the Blowtorch in my system is an enigma at best. I would say that the information on the recording is masked and needs "unmasking". That is much harder then copy and amplify the input. Try to compete with the giants.
It is OUR GAME and not yours.
 

Attachments

  • ctc blowtorch open[1].jpg
    ctc blowtorch open[1].jpg
    99 KB · Views: 238
Last edited:
I have a substantial C5 hole between ca. 2 to 5kHz. That was measued some years ago in an anechoic chamber in switzerland , typical for my age so i have the privilege that my ears did only got older but not hurt as the young people will have because of constant headphone listen.
When i EQ my system for that flaw it sounds totally unnatural.

This is a very innaresting comment, intuitively it makes sense relative to my experience. Sounds in nature are what they are and even with a damaged or different perception of the sound, the mind/ear adapts to help keep us hearing stuff in a useful way. This is why some of us older people can still discern when audio gear is doing it's job properly. That and the smile it brings

The point being that EQing around it sounds unatural.
 
Last edited:
It is the size and the shape of the soundstage ( i can hear things OVER my head and 30 m DEEP, away from me ( tiny but focussed ) ), it sounds very wide but still focussed. It is BIG but SMALL the same time.
And the liquidity and airynesss that makes the Blowtorch so " exceptional ".
I am not the judge. The effect is undouptless real though.
It may even not be the circuitry but execution. Grounding, shielding and such.
It´s adictive when you have a sensor for that particalar drug.
Do you really think that an Opamp stage for 10,- $ can do it ?
Dream on. AND IT HAS NOTHING TO DO WITH THE DISTORTION MEASUREMENTS.
Yes, that type of reproduction is the name of the game - and, a lot of it has to do with the excution. Which means, fortunately for all, that an opamp in there doing everything right can make it happen - I've managed it with cheap as dirt parts in nominally very ordinary setups, not easy but certainly achievable - the level of attention to detail, belief in what's possible, and patience are key.

Why it doesn't happen all the time is distortion, but the typical way of measuring such doesn't highlight what's going on ...
 
Status
Not open for further replies.