dazdavies

iTrader: (22)

Hi all,

I'm in the middle of doing an install and I just can't get the deep bass side of things right.

I don't want big punchy bass, but I do want a system that will drop real low and cover the real bottom end stuff.

As yet I have been unable to achieve this despite having reasonable equipment.

My System is as Follows:

Kenwood DNX7200 Head Unit,
2 x Genesis Profile 2 amps powering front bi amped ADS 7inch components
2 x Kenwood KFC 3514 12 inch Subs Kenwood Electronics Europe | Component Speakers > KFC-W3514DVC
1 x Kenwood KAC 9104D Class D mono block sub amp Kenwood Electronics Europe | Amplifiers > KAC-9104D

These are housed in a dual 12inch sub box with the centre partition cut out.

The crossover on both amp and head unit are set at 50hz. I've tried setting the head unit to pass through but that makes no difference.

The box is sealed and not ported.

The system itself is plenty loud enough but it just doesnt drop low enough for those really low sustained bass notes. Punchy bass is loud enough (too loud if anything)
You can hear the notes I want , but they are just not loud enough(ie faint compared to the rest of the sound).

Would dropping to a single sub in a smaller box help?
Would porting my current box help?

Please can any one give me any tips to improve the real low tones?

Cheers

Daz

darms

iTrader: (5)

Hey mate, have you gone through the useful info on Car Audio Subwoofer Enclosures ?

Cant believe, I use to know all of this stuff by heart back in the day.....getting old you see Something is telling me you need to port your sub box so you can tune it to a set frequency

vince-sti02

iTrader: (2)

Port your box.
I have done mine through the rear shelf 2 way port direct into cabin nice job covered by 2 of the speaker grills I had spare from the front install.

It is a bit difficult but well worth it i found that just porting into the boot was not enough.

https://www.scoobynet.com/ice-2/7171...-upto-now.html

This shows my install with the original porting that is now blocked I ran the ports through the rear shelf where there is space through the metal.
I always wanted a rear arm rest for mine would have made it easier..

incarsolutions

iTrader: (12)

if you want really low bass why not go for a good 15" sub in the right box they will drop really low and still be musical enough to sound good on most types of music

dazdavies

iTrader: (22)

My two Kenwood subs are brand new so I dont really want to go throwing more money at it. I'm certain what I have will do the job just not sure what I need to do with it to acheive it.

0ctane

iTrader: (1)

In a sedan I always advise a bandpass enclosure porting the box through the rear shelf. This gives great bass response in the car. The downsize is the box size is quite a bit bigger. I've had great results this way.

One thing I would definately try is to raise the crossover frequency a bit (around 80-90hz would be good). If you can, make sure your front stage is also crossed over at the same point. There is no point in having your head unit and amplifier both doing the crossover work, this is just likely to cause phase problems. Put the head unit on pass through and let the amplifier crossover split the frequencies (amplifiers tend to have better quality crossovers than head units).

Scoobyn

Ask on here you'll get some expert advice.
Talk Audio

baldfox

iTrader: (1)

I'd suggest porting the box too... thought you'd need to really drive a sealed box to push the sub lower. Porting makes it easier. I could be wrong though.. I always ported my installs.

BlueBugEye

iTrader: (12)

Ditto Daz, for low bass you want ported or bandpass box, with 2 12's it could be worth experimenting with one sealed for punch and one ported for the sustained low tones.