PDA

View Full Version : How Low?



Alpine CDA-9815
07-13-2005, 11:20 PM
Alright maybe I'm going out of my mind from working long days, but how low dose everyone's component woofers play down to? While playing some more test tones I've noticed that mine play down to 10Hz :crap:.

creater
07-13-2005, 11:34 PM
10hz...amazing...lowest i carried mine was 30hz lowest

80INCHES
07-13-2005, 11:57 PM
well i played a testtone of 13hz and all i hear is the panels shaking in my door..i see the sub moving but no sound..

80
i want to play a brown note on my comps..where can i get a brown note signal...i heard if u play 9hz at 128db's u will have uncontrolable bowel movement, in others word.....u wont be able 2 control your shiit

squeak9798
07-14-2005, 12:18 AM
i want to play a brown note on my comps..where can i get a brown note signal...i heard if u play 9hz at 128db's u will have uncontrolable bowel movement, in others word.....u wont be able 2 control your shiit

Mythbuster's tested it and determined it was a myth.

squeak9798
07-14-2005, 12:21 AM
I agree with Jmac. You probably aren't hearing the 10hz tone.......your probably hearing either an upper harmonic artifact of that frequency, or the mechanical noise of the speaker itself, something in your car vibrating, etc etc.

Anyways.....with test tones and no crossover, you can get your mids to produce any frequency you want. Here is a 6.5" with a 2hz signal: http://diymobileaudio.com/pics/proto.avi

Alpine CDA-9815
07-14-2005, 12:24 AM
Considering human hearing ranges from 18 Hz to 23 kHz AT BEST, I highly doubt you're actually hearing a 10 Hz tone ... You're probably hearing the mechanical noise from your speaker struggling to try to play a 10 Hz tone ;)

No not saying I heard it at all. Just wondering if it is normal for them to play that low... and with the way the settings on everything is set I don't know why they are.

squeak9798
07-14-2005, 12:26 AM
Where is your highpass set, and what is the slope?

Alpine CDA-9815
07-14-2005, 12:34 AM
Where is your highpass set, and what is the slope?

That's my thing... I didn't tweak the comp crossovers. I've only had 2 sets of comps and on both I had someone else adjust them. I told them how I wanted it, but that don't mean anything.

snebes
07-14-2005, 01:04 AM
I agree with Jmac. You probably aren't hearing the 10hz tone.......your probably hearing either an upper harmonic artifact of that frequency, or the mechanical noise of the speaker itself, something in your car vibrating, etc etc.

Anyways.....with test tones and no crossover, you can get your mids to produce any frequency you want. Here is a 6.5" with a 2hz signal: http://diymobileaudio.com/pics/proto.avi

You should say that video is NWS....just make me skeet skeet skeet

Alpine CDA-9815
07-14-2005, 01:17 AM
Well I checked the comp crossover and it's set to "flat". Then on the "bi-amp norm" on both the of them it's set on the two top pins.

cjjackson85
07-14-2005, 01:17 AM
Considering human hearing ranges from 18 Hz to 23 kHz AT BEST, I highly doubt you're actually hearing a 10 Hz tone ... You're probably hearing the mechanical noise from your speaker struggling to try to play a 10 Hz tone ;)
Pwn3d!

cjjackson85
07-14-2005, 01:18 AM
Mythbuster's tested it and determined it was a myth.
Pwn3d!... again.

T3mpest
07-14-2005, 03:31 AM
There are notes that can cause that kind of thing though, it's well documented, but I don't remember the link. It was the original inspiration for sound based weapon designs.

cjjackson85
07-14-2005, 03:35 AM
If it's so well documented where's the documents :confused: n00b!

traksta15
07-14-2005, 04:19 AM
Pwn3d!


Pwn3d!... again.



If it's so well documented where's the documents n00b!



rofl!!!!!!!!!that was so helpful...........

Alpine CDA-9815
07-14-2005, 10:23 PM
Well trying to figure out these new amps and what they did (Alpine MRV-F545), I've never adjusted a 4 channel so help would be great. The amp has a Frequency switch (X1=30-400Hz, X2=600-8kHz), both are set to X1. The imput channel selector is set to 3/4 (imputs accept independent imput signals). So now CH1/2 is on HPF and it's set to 200Hz, and CH3/4 is set to LPF and it's at 300Hz. The Bass EQ is set to 0db. Does this sound correct, or do I need to tweak it some?

squeak9798
07-15-2005, 09:42 AM
How is your system setup? What's actually on ch1/2 and ch3/4?

Alpine CDA-9815
07-15-2005, 07:11 PM
How is your system setup? What's actually on ch1/2 and ch3/4?

As I said I've never set up components or a 4 channel so. The comps are bi-amped so CH1/2 has to be running the mid and tweeter, and CH3/4 is running the woofers. This is where I'm confused... the amp on CH1/2 is set on "X1" which means it's only going from 30-400Hz (set to 200 on the HPF). Then CH3/4 is on X1 and the LPF is set to 300.

ngsm13
07-15-2005, 07:13 PM
I played a 15 MT @ 2hz in a ported box off a Modded 1501d @.35ohms, now THAT was moving.

NG

audiolife
07-15-2005, 07:35 PM
As I said I've never set up components or a 4 channel so. The comps are bi-amped so CH1/2 has to be running the mid and tweeter, and CH3/4 is running the woofers. This is where I'm confused... the amp on CH1/2 is set on "X1" which means it's only going from 30-400Hz (set to 200 on the HPF). Then CH3/4 is on X1 and the LPF is set to 300.
are you sure its not high passed at 200 on the mid and tweet with the mid bass low passed too 300? if its not this way your tweets would sound really hollow and so forth would sould really bad. i flip through my xdp 4000 and get into 4 way mode i get some really wicjkedly bad lol.

squeak9798
07-15-2005, 07:46 PM
As I said I've never set up components or a 4 channel so. The comps are bi-amped so CH1/2 has to be running the mid and tweeter, and CH3/4 is running the woofers. This is where I'm confused... the amp on CH1/2 is set on "X1" which means it's only going from 30-400Hz (set to 200 on the HPF). Then CH3/4 is on X1 and the LPF is set to 300.


Is the midbass running on the passive crossover also? If so, you shouldn't be lowpassing it aswell. It would need highpassed.

Either way, it sounds like your midbass isn't highpassed anywhere....hence it is playing all the way down into subbass frequencies.

squeak9798
07-15-2005, 07:47 PM
Weren't you the one who's Pro midbass' surround separated from the cone?

Alpine CDA-9815
07-15-2005, 09:18 PM
Weren't you the one who's Pro midbass' surround separated from the cone?

Yep it did. How would I go about adjust the crossover and what not right? I don't believe it's HPFed either, it's playing all the way down to 10Hz and maybe even lower.

Alpine CDA-9815
07-15-2005, 09:50 PM
Alright well I switched 3/4 to HPF and put it on 80Hz, it's no longer playing any lower than 80Hz. Did that fix my problem, or now do I have to do something else? Also on CH1/2 I put it on X2 so now it's playing from 600Hz-8kHz. It seems to sound better now, I just need to know if this is right now and if there is something else I need to do to not have the speakers get damaged.

squeak9798
07-15-2005, 10:51 PM
Again, are you using the passive crossovers? And if so, what speakers are on it?

Alpine CDA-9815
07-16-2005, 12:44 AM
Not sure what you mean by passive. If you are talking about the xovers that came with the comps then yes. As I said I didn't hook it up, cuz I never have befor. All 3 are hooked up to it I believe.