Can someone explain this: - Tilted Forum Project Discussion Community

Stare At The Sun · 03-17-2004, 08:21 AM

On my new subwoofer ( http://www.mordaunt-short.co.uk/products/907w.html ) , there are three controls.

Level (bass control)
I know what that does, obviously

Phase
0-180 degrees

And frequency
50-150hz

What do these mean? Where should they be at, etc. TIA!

saltfish · 03-17-2004, 08:55 AM

Well, lets see...

Pase, I'm assuming is either 2 position switch, or a variable knob. This is to set the phase of the signal compared to the input. Because lower frequancies travel slower compared to higher freqancies and such.
The easiest way to tune this is by using your own ears. Set up the system they way that you would like, making sure that all your polarities agree. Then run a bass intensive CD, and tune the phase of the sub until it sounds pleasing to you.
If this is a 2 position switch, it is included so that if the subwoofer is canceling out the bass from the mids and woofers, a quick phase switch can help correct the cancelation.

Next, the frequancy control is merely as 'limiter' or a 'band-reject.' This will cut off the frequancies about the stated number. If you choose 150Hz, it cuts off all signal to the sub that is above 150Hz, same with the 50Hz.

Let me know if that answered it for you.

-SF

Stare At The Sun · 03-17-2004, 09:06 AM

they are both knobs.

Any cd's that are bass intensive to suggest, should i DL some bass test CD?

And where should i have the frequency thing, i mean, right now its on 50. I don't really knwo what hz means...could you explain?

Redjake · 03-17-2004, 10:49 AM

In lamens terms

The Phase thing just allows you to simulate your subwoofer being "in" or "out" of phase. It has to do with the polarity of the subwoofer. You can simulate the results as if you switched the wires on the back of the receiver (or whatever your sub is plugged in to). Adjust it to where it sounds the best. You probably won't be able to tell much of a difference though.

The frequency: The smaller the Frequency, the more punchy the bass will be. It's a smaller bandwitch of hertz (hz), so it will only produce a limited amount of bass at certain points of the song/movie. If you crank it up to the maximum, 150 hz, the bass will be more broad and the bass will occur more during the song/movie. Because of the bigger bandwith. You won't be able to tell too much of a difference here, either. Glad I could help.

Stare At The Sun · 03-17-2004, 10:56 AM

Ah, thank you red. Makes it very clear

jujueye · 03-18-2004, 02:11 PM

Quote:

Originally posted by Redjake
The Phase thing...Adjust it to where it sounds the best. You probably won't be able to tell much of a difference though.

It's usually really difficult to tell which phase the signal is in when it comes out of any amplifier. Every one is different. RJ has it right: which ever sounds best is ideal. Turn it all on or all off. In some instances if the signal is way out of phase, you'll hear very little bass. In this case, of course, turn it the other way!!!

Quote:

Originally posted by Redjake
The frequency...

This can also be used as a tuning device. If you can find out what the low end cut off is for your main speakers, you can set this frequency to be near that. The idea is to get this sub to integrate with your whole sound system, and not just stick out and saying to the world, "HEY - I'M A SUBWOOFER! AM I LOUD OR WHAT?" Any frequency below 100 will increase the chances of the sub being difficult to locate by hearing alone.

cheese · 04-10-2004, 04:34 PM

look online for "THX ultimate subwoofertest" that will get ya all the base you need

Jephree · 04-10-2004, 10:39 PM

Where's Brandon and his good advice on the subject matter?........

steveincolumbus · 04-12-2004, 11:04 AM

I would never download a bass track off the net unless it was in a lossless format, but then you get to be a large file and alot of prograns will not burn the disk then because it is not a standard mp3 type format....

In short go buy a test cd, or just put in a cd/dvd with lots of bass.....

There is no better way to tune a stereo then with what you listen to most of the time.... you want what you listen to to sound good, and who cares what everything else sounds like if you don't listen too it..... with that said put in whatever you like and then tweek it by adjusteing everyting till you get it sounding like you like it......

everyones hearing like their opions differ.....

03-17-2004, 08:21 AM	#1 (permalink)
Stare At The Sun Eh? Location: Somewhere over the rainbow	Can someone explain this: On my new subwoofer ( http://www.mordaunt-short.co.uk/products/907w.html ) , there are three controls. Level (bass control) I know what that does, obviously Phase 0-180 degrees And frequency 50-150hz What do these mean? Where should they be at, etc. TIA!

03-17-2004, 10:49 AM	#4 (permalink)
Redjake I'm a family man - I run a family business. Location: Wilson, NC	In lamens terms The Phase thing just allows you to simulate your subwoofer being "in" or "out" of phase. It has to do with the polarity of the subwoofer. You can simulate the results as if you switched the wires on the back of the receiver (or whatever your sub is plugged in to). Adjust it to where it sounds the best. You probably won't be able to tell much of a difference though. The frequency: The smaller the Frequency, the more punchy the bass will be. It's a smaller bandwitch of hertz (hz), so it will only produce a limited amount of bass at certain points of the song/movie. If you crank it up to the maximum, 150 hz, the bass will be more broad and the bass will occur more during the song/movie. Because of the bigger bandwith. You won't be able to tell too much of a difference here, either. Glad I could help. __________________ Off the record, on the q.t., and very hush-hush.

04-10-2004, 10:39 PM	#8 (permalink)
Jephree AKA: Boner Stabone Location: The one and only, SoCaLi	Where's Brandon and his good advice on the subject matter?........ __________________ When's the next good swell in SoCal?

03-17-2004, 08:55 AM	#2 (permalink)
saltfish !?!No hay pantalones!?! Location: Indian-no-place	Well, lets see... Pase, I'm assuming is either 2 position switch, or a variable knob. This is to set the phase of the signal compared to the input. Because lower frequancies travel slower compared to higher freqancies and such. The easiest way to tune this is by using your own ears. Set up the system they way that you would like, making sure that all your polarities agree. Then run a bass intensive CD, and tune the phase of the sub until it sounds pleasing to you. If this is a 2 position switch, it is included so that if the subwoofer is canceling out the bass from the mids and woofers, a quick phase switch can help correct the cancelation. Next, the frequancy control is merely as 'limiter' or a 'band-reject.' This will cut off the frequancies about the stated number. If you choose 150Hz, it cuts off all signal to the sub that is above 150Hz, same with the 50Hz. Let me know if that answered it for you. -SF

03-17-2004, 09:06 AM	#3 (permalink)
Stare At The Sun Eh? Location: Somewhere over the rainbow	they are both knobs. Any cd's that are bass intensive to suggest, should i DL some bass test CD? And where should i have the frequency thing, i mean, right now its on 50. I don't really knwo what hz means...could you explain?

03-17-2004, 10:56 AM	#5 (permalink)
Stare At The Sun Eh? Location: Somewhere over the rainbow	Ah, thank you red. Makes it very clear

04-10-2004, 04:34 PM	#7 (permalink)
cheese Psycho Location: In your bath tub with all your other rubber toys	look online for "THX ultimate subwoofertest" that will get ya all the base you need

04-12-2004, 11:04 AM	#9 (permalink)
steveincolumbus Psycho Location: BFE, Kentucky	I would never download a bass track off the net unless it was in a lossless format, but then you get to be a large file and alot of prograns will not burn the disk then because it is not a standard mp3 type format.... In short go buy a test cd, or just put in a cd/dvd with lots of bass..... There is no better way to tune a stereo then with what you listen to most of the time.... you want what you listen to to sound good, and who cares what everything else sounds like if you don't listen too it..... with that said put in whatever you like and then tweek it by adjusteing everyting till you get it sounding like you like it...... everyones hearing like their opions differ.....