Ok here is one I hope is unique.. though it might be short lived.

What is your favorite frequency of bass to tune your subs to and why?

I like ol 65hz. It seems to catch the best of the lows and a nice chunk of the mid to high bass.

Especially with a 45hz boost.

This is with 2 10's rated to go down to 18hz.


Anyone else?

:lala:

 

what are you talking about? Is that the frequency you tune your crossover to, or the tuning frequency of the port? If you're tuning your port to 65hz, you've got to have some pretty lousy sounding stuff.

If you're talking about crossover frequency, then it depends on filter slope, as well as your subs, your mids, and how well the 2 integrate. It's very application specific.

Oh, and no 10s are flat to 18hz in an anechoic chamber, but in a car with typical cabin gain, almost anything is.

 

i have my x-over set to 100hz but i personally like a more colorful bass.

 

i rarely run my subs with a crossover of about 12db/octave @ 80-90 hz.

anything over 100 and it becomes very apparent where the subs are placed.


adam

 

I have a bench sound generator.......anything you want from 20-20,000 Hz! It's a bit old, but it's stable and it's the best way to tune anything audio.

I'm with Jim, I'm really not sure what aspect of tuning you are talking about. Do you mean setting the gain, cross over, center frequency.........

what to do with all those dials on a JL amp...?

I guess I would use whatever frequency suited the purpose.

If you run 60Hz, you can run power tools off of the amplifier output.............and that's my contribution to this thread!

 

:yourock:

 

I misworded things I guess..

I was trying to say what kind of bass reproduction do you enjoy most.

The way you get there was uninportant.

Obviously not the thread I thought it would be.

Oh well.

 

finally... a valid reason why i might stick a big amp in my car.

 

with every hit of bass you could screw one screw in

 

oooor


**digitally creates a sound file of a 60Hz tone**
**burns tone to CD**
**plays CD and uses Dewalt drill**

:lala:

 

Did you really! That rocks!

That must be nice being able to create any digital tone you want. Be sure it is a good sine wave though, some appliances don't like unusual wave forms.

Saigon, it's got to be a continous tone, unless it was a pulsing 60Hz....in that case...maybee each hit would turn a screw.

It would be ideal to have 120vac too, but most things will run on less. I don't have a clue what the impedence would be, but I'm sure the amp will be fine. It's more than likley higher than subs.

Demicon, I guess I prefer sealed 12"s with a little power behind them. I've rarely heard ported boxes that sound decent in cars, but that is just my preference.

 

i didnt really do it..... but i wouldnt mind trying it.

i was kinda joking when i posted that.

 

lol thats assuming you could patch the appliance into the amp....lol

 

that is easy. cut off the plug/ use two femal spade terminals and run to the positive of one side, and the negative of the other.


my kicker zr1000 will put out more than 100V @ 60 HZ.




adam

 

I’m not sure I would do this, the back EMF from an AC motor has got to be ungodly. I don’t know, I may do it with a cheap amp and……….wheels turning……. :lala:

 

I certainly wouldn't do it with your 'favorite' amp. I would think a more beefcake amp would handle it better than a cheapie.

In any case....If you need power that bad, just buy a power inverter.....

 

until you're stuck offroad and you need a power tool... lol...


really though, thoes 4x4 guys do some crazy wierd stuff like that.

 

Amen to that. I had a friend that made a tube style bumper (three tubes and a grill guard all connected), air tight, put a tire fill valve on it and would fill his bumper with 150-200 PSI before he would go on a trip. He could fill two tires out of his bumper (with a hose he made and rapped around the bumper).

 

Yuh-huh... and when their fuel pump dies, they fill the windshield washer reservoir with gasoline, route the washer lines into the carb, and just keep "washing the windows" to get them back onto the road. Slick stuff.

I bought a bass test cd from Crutchfield back in 1994... each track was a steady Hz tone. I wonder (a) if I can find it, and (b) if it has 60 Hz on it.

 

and (c) if you'll rip it to mp3 and host it for us.

 

So, by turning the volume up or down, you would thus vary the voltage of the output...and you would thus vary the RPM's of the tool you were powering.

Correct? World's stupidest substitute for a Variac.

JC

 

search for test tones, because there was a thread a few weeks ago on here, and I found a website from it where I downloaded like 100 wav files and burned a standard bass test cd... then I put on some kick *** bass music and its pretty nice.

 

Isn't there a magic bass tone that gets girls off? And what about the Brown Noise?

 

I don't know and probably don't want to know what brown noise is, but rumor has it that 33Hz works for the girls...

although I'd imagine this can vary.

I've heard that 37,896 Hz will make your dog go insane and chew it's own tail off.

 

33hz is supposed to be the magic number. I like to refer to it as pink noise even though that name is already taken.

 

wow.. I've never heard of the "pink" noise as you put it, but that's interesting. I'll have to test this theory, hrm hehe.

 

I like 10 Hz, you can see the sub moving but can't hear it

As for 33Hz, it works, just turn it on, crank it up and tell the girl to sit on the sub box....she will be smiley in no time flat.

 

The speakers in the dash are so small 100 to 125 would be best to fill them out. Ideally I prefer 80 hz tho.

 

If I don't cap the bass at around 80hz, then I get some mad vibrations from the plastic in the back.

 

i recomend (i personally enjoy) a box tuned between 28-35hz

filters capped around 80

http://www.jbl.com/car/movie/what_the_movie.html

somebody say amps and powertools???

 

w00t

 

some of my older amps had lights for high current mode, or high voltage... weird

 

That's funny you bring that up because That's where I got the idea from.

Those guys came to the shop I was working at for the Project Mayhem tour.

I knew before hand that this was possible, I mentioned it during the seminar and that's when Gary mentioned they had cut an amplifier in half with a sawzall while it was energized...

That's when I realized there are some sick in the head people in this world! I couldn't see the vidio, but I'm guessing that's what it is.

At the time, they had a RAV-4 with the crown GTI 6000 in there, it hadn't been wired, but the fiberglass was insane! I'd like to see how they got power for that.

 

that punk bastard should have sent me the amp instead... he could have sawed a piece of wood... or metal in half! fool! ah, or maybe a lanzer amp, or lighting! yes that would have worked too... its the same as cutting wood...

 

the sawzall was powered from the speaker output of the amplifier.

They ran a 60 Hz test tone through it and adjusted the gain to get roughly 120 VAC....

Meanwhile.....they cut the amp in half with the sawzall.

I still don't know what it proves......just madness!

Those guys break all kind of stuff, that's not even the half of it!

What about the Dept. of Highway Saftey? Give me one of those cars......I'll wreck it for ya eventually!

The Underwriter's Laboratories......those guys would just make you cry.



What's in that vidio anyways? I can't get that garbage to work on my computer...

 

It was discussing the difference between high current amps and high voltage amps, just different ways to get the power. Then yes, they powered a sawzall and cut and amp in half. And ScrapMaker, the amp was probably a broken not worth fixing amp.

 

still made me tear up... watching an amp go out like that... *sniff*... and it makes perfect sense, that's why many new cars are starting to adapt the 24 volt and higher... more efficient because all the wires in the car can be the size of speaker wire..... like 16gague... even to the high beams.... really smart, dunno why they aren't always like that

 

my favourite personal setup was tuned to 22hz...but tuning that low is totally for street beating, you'll get eaten alive in comps even though your ears will tell you the lower pitched sounds are louder

 

pretty damn low... I don't even think you can hear much less than that... you can feel it though

 

a point of interest, the MTX Sledgehammer boxes with the 9500s are tuned to 33hz.

lol, leave it to MTX.

adam

 

so do a lot of you have ported boxes or what? because I wonder if it would be worth it to modify my box to make it ported... I bet it would sound great.

 

I keep the 8s in my car at 150hz, but no bass boost. The 10s in my truck anywhere from 80-100 (adjustable).
If I remember correctly.

 

I personally prefer a properly matched sealed enclosure.

Everyones ears are different, but I can't appreciate some of the ported boxes that some of my friends do so much.

However...for home stereo applications, ported subwoffer cabinets can produce some absolutley fantastic bass.

For me, sealed boxes with 10"s or 12"s sound the best in cars.

I'm sure there are more than one sub/box combos that will deliver the the bass with SQ and some punch. It's cool if you know what they are, but sealed is gauranteed to sound good IMO.

disclaimer: must use good stuff and hook it up right (as always!)

 

True, I have not heard a sealed system sound "bad", but maybe not as good as others... but man, I sure have heard some horrible ported systems, they really didn't know what they were doing, and it sorta sounded like continuous farting... and they loved it, probably because they did it themselves and were too proud of their work.

 

that's the thing, as long as it hold air, it's hard to **** up a sealed enclosure, they're alot less sensitive to volume changes.


adam

 

plus I believe that you can get more punch out of a sealed enclosure... but I think you lose some of that high quality deep bass... but maybe you overcome that with stronger woofers

 

Key point- You must have abundant powert to get the most of a sealed enclosure.

I like to have atleast 300 watts real power. At that point, it will punch and get plenty deep.

Ported boxes are much more efficient and will give a good thump with less power. Some even sound great if tuned properly, your right, most of them suck.

 

might as well go with a sealed box, because they are easy to come by, or make, and amps are dirt cheap...