no. never

 

On most systems you have so much output at 45 hz that you dont need more. Cant see using it.

On the other hand a bass boost like on the JL Slash series are very useful. Center freq, Q and boost amount are all independently variable. very handy.

 

So, it's just a gimmick or marketing bait for bassheads and noobs who think they need to accentuate frequencies at the low end?

 

ding ding

 

i have a powerbass xta 5000 and have the bass boost at 0,i have no need in my system to use it,maybe one day when the wife gives me the ok to do a wall with 2 18s in my xb than i will think about using it but for now,its doesnt even register

 

Most are trying to compensate for a lack of power they should have bought, or more piston area/xmax. Normally it will just end up clipping your amp and blowing your subs in the long run.

 

Bass gain around 45Hz isn't that useful. It would be better if it had variable center freq like a PEQ. If I were to design a cheap "bass boost" control I would put it lower down, like 30Hz instead. A -12/+6dB control would be awesome really, together with the SS filter (HPF) you could shape the FR curve somewhat.

Sent from my Samsung Galaxy 3 via Tapatalk.

 

Yeah, my cheapy amp also had a bass boost, initially I thought to myself "Great! This will be nice to boost the low frequencies!"

I then realized that the boost was at 45Hz and that is pretty useless, tried it anyways and it sounds crap.


Although the talk of the bass line control being used for the bass boost makes me worry a bit. I thought that the bass control which comes with the PPI 1000.1 is for the actual volume so you could adjust the volume on your sub, if you want a bit more kick put it up, if you mother is in the car with you, you can turn it down etc.

If the control is just for the bass boost then that too is completely stupid and useless and really disappointing.
Can anybody confirm this?

 

I would if my amp had one down at ~30Hz to compensate for the roll off from a small sealed enclosure. I already have a peak at 45-50Hz.

 

Excellent point! I use sealed enclosures myself and agree completely that a "boost" like you describe might be far more useful for most SQ oriented listeners.

 

Psyclown. Most sub amp remotes are level/volume controls. Their are some that have both a bass boost and level control.

The ppi remote looks like a level/gain control. Not a bass boost. It basically turns your gain down from where you set it on the amp to attenuate when moms in the car.

Ecbmxer I was thinking the same thing. Typically have to cut 45hz. Not boost it. Lol.

 

That is of more use then, what I wanted
Thanks!

 

i am adding a little boost to the bottom end of my sealed subs around (40hz..narrow passband) using a 500/1 slash amp. I also am using the bass knob for the slash amp.

These are 2 things i have never been in favor of in the past...but they both seem to work well with the JL amp.

 

only if it worked along with the subsonic filter that are on some amps-meaning ajustable to that final cutoff point. mine is right about 23-25hz, a boost right about 30hz sounds right to me? isnt that where most music cuts off if not a little before?. arnt those those the the ones evryone really wants?! the ones you feel?!

 

You got your answer right below

On most systems you have so much output at 45 hz that you dont need more. Cant see using it.

On the other hand a bass boost like on the JL Slash series are very useful. Center freq, Q and boost amount are all independently variable. very handy.

 

hmmm...those are sexy to. i dont have they most amount of knowledge in this feild but...parametric kinda means u can chose the point of boost like i said? is that what your saying?! lol. i kinda just thought a bass boost was a selling point for people that arent informed? but if i can chose where to boost i just might use it!

 

With my RAV4 I am using the para-punch module. I have 1300 watt amp pushing 2x1000 watt rms subs. I keep them at a level much like a home audio setup where they compliment the front stage and can not be located. If I disable the subs then you notice they were playing. The para-punch has selection of crossover frequency and boost level. I normally have it set to 35 hertz for center of the boost curve. Certain songs you just want to satisfy your inner bass head on and it's nice to be able to increase the boost there and on the head unit letting you go from SQ to SPL at a moments notice. It's like having the best of both worlds.

 

The average range of human hearing is 20Hz to 20 KHz.

However 20Hz and below, you can still feel... very much so. This is often the bass where the windows and tables will shake and rattle around. When watching movies it adds a lot to the movie and the atmosphere.

Music does not just stop at 30hz or even 20Hz for that matter, its like with a crossover.
You cross over your mids to your subwoofer at 80Hz, the mids will still continue to play content at 75Hz - just a bit softer.

Many times I have seen people build LLT subswoofers for their home theater and be amazed at how much content is available in the lower frequencies.


The fact that music / frequencies won't just stop suddenly at say 30Hz is the reason why a subsonic filter exists. Your subwoofer will still try and reproduce those frequencies although whether it is loud enough for you to actually notice and for it to make a difference is what is important. This still puts a lot of stress and strain on your subwoofer so lets say there is bass from 189Hz down to 14Hz and you have a small 10" subwoofer, the sub will still try and reproduce all the way down to 14Hz which will put immense strain on the woofer which will lead to it sounding unpleasant and possibly not being as "punchy" compared to if you were to have a subsonic filter of say 28Hz on.

 

Music does not just stop at 30hz or even 20Hz for that matter

Real music does. :rimshot:

Very few instruments (maybe only a huge pipe organ?) can play 20hz or below, and harmonics are whole integer multiples of the fundamental frequency so you aren't getting lower overtones, you get higher overtones. The lowest note on a piano is around 27 hz, higher for a bass guitar.

 

so it makes me wonder why HU equalizer stops at 40?

 

because most people who install an aftermarket HU wont add a sub, so it wont matter much under 40hz.

also, most EQ on HUs have a fairly low Q. even though it says "40hz" it prolly effects from 20-80 hz in reality.

 

I am using an Audiocontrol HPX, with bass restoration in my signal chain between headunit and sub amp. It has a master volume, sub volume and a dial for the bass restoration enhancements. I basically use it as a rotary volume control for the subs, but given the rare listen to some old Zeppelin or such it can give a relatively decent sound pulling out some low content that may not show in the original recording.

Aside from that keep the bass boost at 0, volume at 11! (Spinal Tap styles)

 

NEVARRRRR!!!!!(in my captain hook voice) I let the amp do what it is supposed to, and that is to amplify!

 

I think you might be misunderstanding the purpose of eq'ing.

 

My old Planet Audio Big Bang (made by Zed) had one band PEQ, set freq, Q and gain. Was a big help in the low 30ish area for my sealed 10" s. At 45-50 it was useless, due to cabin gain.

 

My SS ref amp has a subsonic filter with a boost for the cutoff frequency. It's great to have because the SPL of my IDQ 15" drops off quite a bit below 30hz. In addition to that it also has a variable boost, so I can boost a little at 30hz, more at 20hz, and have a relatively flat response from 80hz on down to the cutoff frequency.

 

Nope.

 

Hellz yeah!!!! moor deebeez!!

Not really, unless there was somehow a dip wich is unlikely at 40hz

 

I don't, but I have. Depends on the installation and the gear, really.

Parametric BB (like the JL series) works great in getting a nice rising low-end response when EQ isn't available or wanted in a simpler setup.

Fixed frequency BB is less useful, but not always worthless.

 

Dont have it on my amp (pdx m12) but in past used it on my jl 1000/1 but that had a good adjustable q and what frequency i wanted to boost so i could fill in where i felt it was lacking but otherwise a fixed frequency boost just helps low end thump and helps to clip your amp if you over do it