"Musical subwoofer" and "low frequency noise generator" are not parameters (thank God).
He is in a parallel universe that has strange new laws of physics, away from the right track.
I don't know Edgindin's past here or elsewhere, so I can't really comment about him personally. I don't subscribe to the "musical versus something else" system. I do wonder though, has anyone here performed low-level and low power tests (.001W-.1W) on various large high power woofers? I understand harmonic distortion should be very low, but maybe transient or other dynamic behavior changes at these low levels?
yes, my own 35Hz horn sub. And there was a surprising amount of musical information - not just low frequency noise.
Do you think my personality has something to do with what I hear? Or are you suggesting that my musical tastes affect me hearing? Alright, I like opera, chamber music, vocals, a little jazz, organ - generaly acoustical non-amplified stuff. I listen at realistic SPL, but not too loud. Now what?
For the sub I used to use x-over in the plate amp and it was set for 80Hz.
Woah, Edindin, I was replying to Shredhead's post about you being in another universe with alternative phyics. I didn't say anthing bad about you- I don't know why you're directing this at me out of everyone on this page. I'm the only person who shared the same view as you, and I'm curious about tests at low power. I don't know anything about you or your past here. What I was saying was that I wasn't going to jump on the bandwagon and poke fun at you, mostly because I don't like that. See below:
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I stated early enough that I was not an engineer and, true, I have very limited knowledge about laws of physics, new or old, and such. But I think I have good ears and I generally trust them. And I also regularly attend live performances. So I think I have a fairly good idea what live music sounds like.
Look, I took your post in good humor. Really. I am sorry if you detected anything else. And perhaps our personalities do have something to do with the way we hear music.
This thread just got... BROmantic!
I don't know about you, but I'm having fun! At least I'm talking to people who think that designing and building speakers is a worthwhile undertaking and who don't ask stupid questions like, why can't you make'm small like Bose...
This is a graph of the noise floor of my signal chain. The highest peak at 60Hz is 110dB down. If I put an SPL meter an inch off the dust cap of my sub it's no different a reading than anywhere else in the room at idle.
Sorry for being an a$$ about this, I just don't understand where you are getting the "low frequency noise" thing. Do you mean that you listen to music that has bad rumble noise in the really low end or something like that?
I understand you are not an engineer, but aren't you here to learn? Speaking in your own made up language to everybody confuses the issues. You have already been given some pretty good advice if you would listen.
Sorry for being an a$$ about this, I just don't understand where you are getting the "low frequency noise" thing. Do you mean that you listen to music that has bad rumble noise in the really low end or something like that?
I understand you are not an engineer, but aren't you here to learn? Speaking in your own made up language to everybody confuses the issues. You have already been given some pretty good advice if you would listen.
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Hey man, you're right about that. I want you to build something that you can be proud of. I know some of the geeky jargon is tedious to deal with but you'd be surprised how fun it gets after the initial learning curve.
Yes, master, I'm here to learn - among other things. "Low frequency noise generator" = muddy, vailed bass. And then I listen to a good horn sub and I clearly hear the lowest note on that double bass that I didn't hear before. Before, there was just low frequency noise that didn't sound like the lowest string on that double bass. It was not the string - I know what that string sounds like!
This is what I was thinking too. 'Noise makers' just don't exist with properly designed subs of any kind and you can do this with inexpensive, but properly chosen drivers and drivers that cost a fortune.
If Egindin has been listening to a sub with a less than linear response, then in fact his sub is more of a noise maker than others are.
Driver distortion will be lower in expensive drivers and the drivers themselves will be more linear (play loud similar to low level). Folded Horns with any usable driver with a sealed driver will have much lower than even expensive radiators. Time domain response and phase response (for blending mains in) is the main measurable you have left.
It's probably already been stated in this thread, but multiple subs work really, really well. Earl Geddes (username "gedlee") has a thread on this.
The number one thing I would recommend to someone with a budget of $1000 is the following:
1) Spend a fraction of the budget on a dedicated sub amp, perhaps $250
2) Spend 9% of the budget on a miniDSP ($90)
3) Spend the rest on drivers.
Basically multiple subs are so important, I'd prioritize the amp and the processing before the subs themselves! IE, if I was on a $500 budget I'd use 'cheap' drivers like MCM or Pyle before I'd be willing to skip the dedicated amp and processing. It's *that* important.
There's another sub that's similar to this one, called the "Diyma12".
The dude who had them built was blowing them out on eBay for under $100 for about a year.
There aren't a lot of them out there, but when they pop up they offer some of the best 'bang for the buck' in a sub I've ever seen. I have two
He's the same person who founded the web site "diymobileaudio.com"
(Which is now run by someone else btw.)
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