Possibly damaging woofer?

[Frankensuby 10+ year member]

I've got the box together, sub in and wired to 4 ohm, and it is bridged into an Audiobahn amp (in sig).

The thing that worries me is that it is getting roughly 130 RMS (well below limits) and I had to turn the Bass boost on to get any sort of real response. The bass boost is at 45 hz +18 and I'm keeping the volume knob down to keep from clipping early caused by the bass boost.

Also, the HU can't HPF for just the front set, so I am keeping it down to stop distortion/clipping in the front set.

Is the bass boost gonna do damage even if I am conservative with volume knob?

On a side note, it sounds mean with only a little power to it //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

~Levi

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[.::DuD3::. 10+ year member]

I've got the box together, sub in and wired to 4 ohm, and it is bridged into an Audiobahn amp (in sig).
The thing that worries me is that it is getting roughly 130 RMS (well below limits) and I had to turn the Bass boost on to get any sort of real response. The bass boost is at 45 hz +18 and I'm keeping the volume knob down to keep from clipping early caused by the bass boost.

Also, the HU can't HPF for just the front set, so I am keeping it down to stop distortion/clipping in the front set.

Is the bass boost gonna do damage even if I am conservative with volume knob?

On a side note, it sounds mean with only a little power to it //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

~Levi

im confused, does it respond or not? did you set your gains correctly?

 

[Frankensuby 10+ year member]

im confused, does it respond or not? did you set your gains correctly?

Gains still need to be DMM'ed, but I've done clipping by ear, and I don't hear any (if I'm conservative with HU volume).

Ok, let me try this again //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Sub is bridged on rear channels of 4 channel Audiobahn.

Front channels are running to fronts as per usual.

Rear bridged channel has LPF set at 100 Hz.

The sub responds awesomely, but I cannot use HPF on HU for front set, because it cuts the subs range down to 80-100hz range, therefore making it worthless.

The question is if the bass boost with these specs will cause any form of damage. I do not hear clipping or audible distortion in the sub, but I'm also not an install professional.

Hope that makes it a bit better?

~Levi

 

[mannyb18b]

Turn bass boost off. Set gains correctly.../thread

 

[azbass 5,000+ posts]

get a proper amp to run the sub

thread/

 

[wilzyx 5,000+ posts]

and why would putting the sub lpf down to 80-100hz make it useless? that is where it should be. and does the amp not have hpf/lpf for the front and rear?

 

[ngsm13 5,000+ posts]

get a proper amp to run the sub
thread/

Precisely.

See, the problem is... Audiobahn.

nG

 

[Frankensuby 10+ year member]

Precisely.
See, the problem is... Audiobahn.

nG

Agreed, but it is what I am working with regardless. It was a great deal on purchase, and runs the speakers just fine. It is obviously not a sub amp.

and why would putting the sub lpf down to 80-100hz make it useless? that is where it should be. and does the amp not have hpf/lpf for the front and rear?

I did not say making it down to, the sub was only playing frequencies between 80 and 100 hz when the hpf was turned on.(HU setting)

My PG Xenon 400.1 is an X-mas present to myself.

But I am not worried about that. I'm asking if the Bass boost being on will hurt the sub even if it is played conservatively, as in the HU not being turned up just to make "Whistle While You Twurk" sound louder. I'm assuming the sub should have a break in period?

~Levi

 

[creyc 10+ year member]

It will only damage the sub if it drives it into clipping. +18dB is a big boost, it seems you'd be better off turning the bass boost off and increasing the gains which, by the sound of it, have a lot more room to be turned up.

The only thing i can think of is that your sub is playing a lot higher frequencies than most subs, and as such you have to keep the gains down because it would clip otherwise. In that case maybe bass boost is what you need to get the subsonic frequencies to the sub until you get a separate amp for the sub.

 

[T3mpest 10+ year member]

yeah, 18 decibels is asking for 64x the power of your RMS at 0 bass boost, from a 45hz tone. So if your only pushing 5 watts out of your amp, and turn the bass boost up to +18, you'd better have 300+ watts on tap, or else you WILL clip. Turn it down, get a better amp, odds are your are clipping, that's too much of a boost.

 

[samson 10+ year member]

Bass boost is best left to quality speakers like Kraco.