Frequency?

[Beerdrnkr 5,000+ posts]

I have an MTX Thunder 1501D and was just wondering what the frequency knob actually did, I set it to where I think it sounded the best but to me it seemed like it was just making it a little louder. Also, if I run another 1501D how can I set the amps equally to match frequencies since they're not strappable?

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[spoonraker 10+ year member]

The Frequency knob is part of the Bass Boost functionality.

Bass boost increases the gain on a small range of frequencies, the frequency knob represents the center of that range.

turn bass boost completely off and that knob will do nothing, like it should

 

[XanderMoser 10+ year member]

The Frequency knob is part of the Bass Boost functionality.
Bass boost increases the gain on a small range of frequencies, the frequency knob represents the center of that range.

turn bass boost completely off and that knob will do nothing, like it should

I don't think so...

I'm pretty sure the frequency knob is the low pass cut off frequency. It essentially limits the sub to play low frequencies only. If there are numbers around the dial, try setting it to around 60-80 hz and play with it from there. Whatever sounds best to you really, which you already did.

 

[spoonraker 10+ year member]

It's either bass boost or low pass filter like you said.

I've seen quite a few amps and not one has labeled the low pass filter as frequency, it's always been the bass boost center.

My money is still on the bass boost. Either way, turning it down as low as it will go shouldn't have any negative effects, and you will know which one it is when you adjust it.

 

[Beerdrnkr 5,000+ posts]

Well the amp also has an eq dial which I thought was for the purpose of the frequency it should play at but messing around with the frequency more again today it seems to let in a little vocalization into the sub, so that would be like a filter right? If I get a sealed box would that feature not even matter?

 

[spoonraker 10+ year member]

Is this your amp??

http://www.mtx.com/caraudio/products/manualsQuickInstall/amps/TE1501D_InstallSettings.pdf

If so then my original post was correct, the frequency knob controls the center frequency of the bass boost.

If not, just look at the knobs, if there is a knob that says "Low Pass Filter, or LPF" then the frequency knob is for the bass boost.

 

[jco1385 5,000+ posts]

i think he has the old 1501d. i have the same one and i'd like to know also. there are 3 knobs. FREQ, EQ, GAIN. none have numbers around them.

 

[spoonraker 10+ year member]

Are those three the ONLY knobs on the amp?

 

[Beerdrnkr 5,000+ posts]

Are those three the ONLY knobs on the amp?

yeah, and it has the 0-180 phase switch and a hi/full/lo pass switch

 

[spoonraker 10+ year member]

From the sounds of it you have a low pass filter that isn't adjustable. Like i said before the EQ is going to be the amount of bass boost, and the frequency is going to be the center of the range of frequencies being boosted.

one more time...turning the frequency knob all the way down, whether or not it is bass boost or low pass filter, will not have any negative effects. Try it and listen for what it does. If the volume seems to decrease/increase when you adjust it, it is bass boost, if not, it's the low pass filter

 

[jco1385 5,000+ posts]

mine has no hi/lo pass switch. it's a subwoofer mono amp. built in lo pass.

 

[jco1385 5,000+ posts]

^^ thats what mine looks like

 

[Beerdrnkr 5,000+ posts]

mine has no hi/lo pass switch. it's a subwoofer mono amp. built in lo pass.

Yeah, that's what it looks like I might have been thinking about my mtx thunder 502 amp

 

[Beerdrnkr 5,000+ posts]

Jco how does your X sound on that 1501D? I was thinking about getting that same setup.

 

[ShakesAllDay 10+ year member]

Just a guess...

freqeuncy = LP/HP x-over

EQ = bass boost level at fixed frequency (mine is fixed at 50hz)

gain = gain