Talk but not walk?


Hi Guys

This isn't meant to start a fight, but it is important to on lookers. As a qualifier, I have my own audio forum where we report on audio issues as we empirically test them. It helps us short cut on theories and developing methods of listening. We have a wide range of systems and they are all over the world adding their experiences to the mix. Some are engineers, some are artist and others are audiophiles both new and old. One question I am almost always asked while I am visiting other forums, from some of my members and also members of the forum I am visiting is, why do so many HEA hobbyist talk theory without any, or very limited, empirical testing or experience?

I have been around empirical testing labs since I was a kid, and one thing that is certain is, you can always tell if someone is talking without walking. Right now on this forum there are easily 20 threads going on where folks are talking theory and there is absolutely no doubt to any of us who have actually done the testing needed, that the guy talking has never done the actual empirical testing themselves. I've seen this happen with HEA reviewers and designers and a ton of hobbyist. My question is this, why?

You would think that this hobby would be about listening and experience, so why are there so many myths created and why, in this hobby in particular, do people claim they know something without ever experimenting or being part of a team of empirical science folks. It's not that hard to setup a real empirical testing ground, so why don't we see this happen?

I'm not asking for peoples credentials, and I'm not asking to be trolled, I'm simply asking why talk and not walk? In many ways HEA is on pause while the rest of audio innovation is moving forward. I'm also not asking you guys to defend HEA, we've all heard it been there done it. What I'm asking is a very simple question in a hobby that is suppose to be based on "doing", why fake it?

thanks, be polite

Michael Green

www.michaelgreenaudio.net


128x128michaelgreenaudio
I've been tuning for many years, so maybe it would be helpful to some of the people reading this if I talked a little about my own experience. Like most everyone else, I got started with tuning because I was looking for better sound. I felt that what I had was ok, but I wanted more. I began with acoustical treatments and then moved into stripping down components, using minimalist wires, and tweaking the electricity. At this point in time, I really can't NOT tune a system. How do you listen to a component with its chassis top on when you know that removing it will give you a sound that is so much more dynamic and open? How long can you look at a capacitor strapped down with a plastic zip tie, when you know that freeing it will give you a three dimensional, holographic soundstage? If it's me, the answer is - not long at all. :)

As my systems became more finely tuned over the years, I began to notice that recordings I remembered as all sounding reasonably good differentiated into a large group of recordings that sounded spectacularly good, and a small group that didn't sound anywhere near as good. What I also observed was that if I put together two equally good sounding systems from different components, the same recording could sound wonderful on one system and ho-hum on the other. It wasn't the recording. At this point, I could have done one of three things: One, dial the system back until all recordings sound just ok. Two, live with the tuned in system that does most recordings extremely well and ignore the recordings that aren't so great. Or three, tune the system to the recording.

I'd like to say that I've been in camp number three all along, but that isn't true. Opening a system up by stripping down components, using good platforms and good wire, careful setup of speakers and room treatments, and releasing tension from the electrical will get you to spectacularly good sound. But tuning to the recording is really a different skillset. It's the same tools and techniques, but you need to understand what sonic effect each move has and then put together the right combination to get yourself where you want to go. With so many variables involved, it was really more than I felt I could do.

What changed things for me was the discovery of the Audolici A25M. The Audolici is an integrated EL34 tube amp that makes about 30W per channel. It's a lovely sounding amplifier even untuned, but what really sets it apart is its ability to be tuned to the recording with wooden blocks under its chassis. What this means is that recordings that had sounded distant, unfocused and uninvolving can be tweaked into sounding beautiful in just a few minutes. And the spectacular recordings sound just as spectacular as ever, with their own settings. Essentially, what had been a complex process involving many different parts is now reduced to an adjustment on a single component.

In practice, I find I don't actually need to retune for every CD I put on. Many recordings will sound at least good to very good with the same block setting under the amp. But when I put on something that has a distinctly different recorded 'key', I'll know it inside of 10 seconds, and I adjust the blocks until I get the sound I know was in there. :)

I know there will be people who read this and have no interest in going down this road. Believe me, there's no judgement. Every person needs to decide for themselves what great sound is, and how far they're willing to go to get it.  I'm just telling you about what has worked for me.



moopman
You did (mention pant legs flapping in the breeze). Fair enough. Don't get your pant legs in an uproar! 

Why are your gums still flapping in the breeze? 
I said it before and I’ll say it again. What type of wave is a sound wave?
In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion. A sound wave traveling through air is a classic example of a longitudinal wave. Hel-loo!
Post removed 
bill333

How do you listen to a component with its chassis top on when you know that removing it will give you a sound that is so much more dynamic and open? How long can you look at a capacitor strapped down with a plastic zip tie, when you know that freeing it will give you a three dimensional, holographic soundstage? If it’s me, the answer is - not long at all. :)


So taking off the top of a component will "free" it dynamically etc, and releasing a capacitor releases the soundstage to bloom into 3D?

This sounds like something along the lines of folk homeopathic ideas such as "like cures like." That is, concepts that draw some mildly appealing relationship in the mind of the user, but without any actual scientific grounding in reality.

Unless of course I’m missing something.

bill333 can you give us a non-mystical, technical explanation for how removing the chassis top of a component would cause those audible differences (or releasing of the capacitor)?

(BTW, I’ve had the top off some of my equipment before - pre-amps etc - for different reasons and...no...it did not change the sound).