Nope, it is a header for a VCSL laser. They laser straight up from their tops.
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Sy,
I would assume with a switch the changeover would be instantaneous, but then I keep hearing about how the switch skews the results? What else can you possibly do that would switch without some kind of contacts, even a relay has contacts? As for testing to +/- 1db or less then I assume that you are using one pair of speakers that should be flat across the frequency band. The problem is how many speakers actually could do this, most don't even come close and then how does the FR affect the results. A rise in one device could match a dip in the FR of the speaker and you could miss that. If you correct the speaker with a 1/3 octave eq then you have all the phase shift that brings with it. Never easy is it?
I would assume with a switch the changeover would be instantaneous, but then I keep hearing about how the switch skews the results? What else can you possibly do that would switch without some kind of contacts, even a relay has contacts? As for testing to +/- 1db or less then I assume that you are using one pair of speakers that should be flat across the frequency band. The problem is how many speakers actually could do this, most don't even come close and then how does the FR affect the results. A rise in one device could match a dip in the FR of the speaker and you could miss that. If you correct the speaker with a 1/3 octave eq then you have all the phase shift that brings with it. Never easy is it?
Blowchip vs Blowtorchless do it .....
When you agree to SY refereeing a DBT no problem.
F. Micro transient slurring of detail, places it 'out of time' with the body of the signal.
The human ear hears this and thinks it is extra or found detail. It is that, according to how our ears function. But only on initial analysis.
Most won't take it further, finding that the first answer they reach fits their expectations and desires..and they stop right there. Sometimes for their entire lives. This does not belong in a research or investigative environment, one must continue past found answers to be sure they are correct. Exploration must continue, even if it was and is the correct answer. There's always something else....
If one listens again, for a while.... and learns to listen for obscured aspects of the sonic presentation that is happening due to this phenomena, then one realizes the false detail aspect of a steel/metal can is horribly wrong. Or an aluminum can, or other metals. Specifically the ferromagnetics, or anything that has a level of hysteresis function. Stainless, nickels, etc.
Not saying plastic dip is any better, but a metal can is not an upgrade to dip packages, with respect to use in wideband performance audio applications. We turn back to the original signetics ceramic, again, for an answer. For all the right reasons.
Then one arrives at the question of levels, time, complex impedance, field effects, and the rest...all rolled into one... and this intermixing... and how this works in the hearing function in relation to this finding.... and wonders. The answer is that, right or wrong, it is the ear that is the arbiter - and a damn fine one it is.
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@Scott,
DBT ? Dogma By Technicality .
Build Blowchip and by golly they will come and we can put this to rest , lets see if JFets are dead , long love the chip...
It figures...
The curious thing about audio is that some things require being obsessively careful about ... and other things can be quite sloppily done, and you get away with it. The thing is, different people have completely different groupings of these "things" - which is why the sound qualities people tune into, which they think are 'right', vary so much between individuals ...
Blowchip vs Blowtorch
It's a tough blowjobb. It is sometimes better to avoid such contest because even if the test is flawless the conclusion can still be misleading. I found it so with many documented BT on the net. That's when they think Statistics is a piece of cake.
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