ssh

One thing I should add. Depending on how loud what ever it is your setting the gain on, you may need to step away to notice any distortion. IE: 2 18s and 4kw. Near it at any reasonably high level is well above our ears' sensitivity, and you'll have a harder time noticing any distortion.

What's the volume or displacement of a cylinder with a diameter of 10"? The height might be 1" or 4". In rudimentary terms.

Call me ignorant, but as I was reading on SiN at one point and there was a good recommendation of going with 1/3 of Sd for daily and 2/3 of Sd for SPL setups. Almost all the boxes I've built had at least 1/3 of Sd and currently all my good SPL setups are over 2/3 of Sd. With mine having almost as much port area as cone area. Sd is only part of the picture though. That rule is estimating an average for the displacement.

Ignorance.

This is the most helpful post ive read on the DD-1, I was dumb and blew the money on one. Its got some uses but not many because music also has more distortion than a sine wave. I can set my gains with the DD1 on sine waves but as soon as I put on music to check it, its showing distortion. Only really thing ive liked it for is for testing songs to see which have a lot of inaudible distortion. Also makes you look more professional when you pull out it to tune someone's system. Although I just tune it by ear any ways. It can also show one's ignorance.

Might have to remind me before I go although this isn't something I'd forget. Funny since I had first heard about it only a month ago. Have you ever actually been to Japan? Only once this year Your away from home the majority of the year, correct? I wouldn't mind seeing different parts of the world, but too long away from home would be hard I imagine.

Somewhat variable. I refuse to rule of thumb. That being said exceeding 30m/s isn't something I'd do Of course what you could do is give them a check box with three choices. 10m/s, 30m/s, and 50m/s Reason being if someone isn't regularly wailing on something and can deal with a little port noise/compression when they do the higher velocity might be fine. Personally my shit is never maxed so it probably wouldn't matter. That's what I was thinking. In my last enclosure I never heard any port noise, but it didn't have a port either.

Sweet. If you have AAA then you can knock some more off most likely.

Might have to remind me before I go although this isn't something I'd forget. Funny since I had first heard about it only a month ago. Have you ever actually been to Japan?

This thread, or the product page for the dd-1?

Well then the DD-1 is even more useless. Steve himself on here said that would be a poor use for it. Conveniently that matches with the fact it isn't useful for anything. An oscope won't help you win comps either btw. First and foremost you need to learn to hear/smell and know when to turn things down. If your playing tones then why do you even need to set a subsonic filter? Sure it's nice for safety, but if you have the luxury of knowing exactly what frequency your playing then it seems pointless.

Because IIRC WinISD doesn't account for port displacement when giving the port length, it's as if your doing an external port. Perhaps they have changed it in the latest version?

What would be an average number to shoot for vent mach? WinISD suggests under 0.16 which is ~54 m/s, but that seems high from everything I've read. Also read an article from the peeps at JBL about doing 10 m/s to reduce any port compression--IIRC. I'm thinking 25-30 m/s for an average, and perhaps less if it's SPL oriented? I'm playing with the idea of making a gigantic calculator for the average people who post the same stuff day in and day out. Input partial t/s specs of driver, driver displacements, power, max dimensions, desired tuning, and an adjustable (though initially set) vent mach. Calc comes up with required port area, port length, and net volume for end result.

Sounds like a fun setup.

I'm sure this will piss off some dd-1 lovers.

That's my USSR command post for wifi.

I'm not entirely sure why so many people are so happy about throwing money away for a dd-1. Sort of like paying me money so I can spray paint a line from your doorstep to your car that way you don't get lost.

Your over thinking it. Neither are going to be helpful. All music is all recorded at different levels, with varying dynamics, so inevitably some of it will be quieter or louder than others at the same volume setting on the head-unit, so you'll be finding yourself raising the volume or lowering it by a few notches for max listening. Correct? By that same token, think of what either the dd-1 or the o-scope is doing. Measuring some distortion at some reference level. Some reference level that is different than your music. So you could play it safe, and use a higher level, but then short change yourself on output, or do the opposite. So why bother with either? Use your ears, and listen for audible distortion. Once that occurs, turn it down some. Then use common sense when playing various music, as song A may sound fine at volume 21, but song B distorts at volume 19.

I knew I was forgetting something. Walked by the bookstore when I was at campus.

Lol

I wonder why then. Me no know!

About to watch a video of monkeys fucking. Fuck anthro class. *sighs*

4. Potassium: is also in anti-freeze systems but is also used as an additive in gear oil. If your oil analysis shows the combination of Boron,Sodium and Potassium then you should have your engine looked at for a coolant leak into your oil.