My system in the six at the moment consists of a Pioneer cd headunit and autochanger which has 3 x 6v pre-outs with Burr Brown Dacs which runs into a Boschmann 4 channel full range amp which runs Alpine Type S component speakers in the front doors and Alpine Type R 6x9's on the rear stealth shelf and and an Alpine MRP-M1000 mono amp which runs an Alpine Type S dual voice coil 12inch sub in a well damped ported sub box. Its running in 2ohm mode.

The full range set up im happy with for now apart from the mickey mouse Boschmann amp which I plan on changing for something a little better at some point - but its the bass i find quite un-satisfying at the moment. I very much enjoy good sound quality over ear bleeding SPL.

In a previous car I used to have a 12 inch Pioneer sub and a 300 watt Jensen amplifier which from memory used to sound rather good compared to my current setup which I find just makes a noise rather than producing a sound which is detailed, dynamic and tuneful.

Whats your thoughts on an idea for improving my current setup with regards to bass? The amplifier retails for around £200 so you would think it would be capable of producing a good sound compared to a £100 Jensen amplifier from Maplins back in the day although I have to say I really dislike the 'subsonic filter' function on the MRP-M1000 amp which you cant switch off unfortunately on that model. Or is it the relatively cheap in the overall scale of things Alpine Type S subwoofer which is causing my issues? This only retailed for around £100 from memory which is pretty cheap compared to my previous Pioneer (£130) and definetly in the budget range of subwoofers.

I wouldnt rule out selling the Alpine MRP-M1000 - I still have the box and its in mint condition so I think I could get some decent money back for it anyway.

Id appreciate any input on the topic apart from welshpugs input who condemns any form of modification from standard (poo) car audio

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m

I'd say that the 6x9s aren't doing you any favours, with them interacting with the subwoofers airspace. Maybe unplug them and see if the bass response is any better?

Have you got any mates with other subs you could try? I've got a 10" Diamond Audio sub which I find has good quality, I'd also recommend JL and Hertz.

I also don't think the ported box will be doing the SQ any good, I've always thought they were better for louder, less clearer applications. Pop along to a local car audio shop and ask if you could try a couple of sealed boxes with different subs to give you an idea of whats about

cba to read all comments, but try a sealed enclosure, ported enclosures have the tendency to sound boom-y and have port-noise

don't think you can fault the sub-amp too, as long as its powerful enough it should be fine.
Why do you dislike the subsonic? Subsonic filters out frequencies below a certain hz, mostly this is 20 or 25hz, keep in mind that most subs their frequency response wont go below 25hz (depends on the size too) so you wouldn't notice it anyhow.

O, and lose that damn boschman pos.

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Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

Ok here's the deal you need a good quality amp if you want good quality sound ? Have a look for a nice JL audio amp and sub ? Go for a 250/1 or a 500/1, mate it to a 10w3 in a proper box = job done

Sub and amp are fine mate, try different subs in a sealed enclosure. Ported for down right wobbly bass, not SQ.

Ive turned the LP filter all the way up and control cut off with my headunit. Typically i'll leave it set at 80hz but sometimes swap and change depending on what material im listening to to make it suit.

The bass equalizer is a dial rather than a swithc, ill stick a picture up soon so you can see what i mean

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m

it should definitely be a switch mate:



hope they didn't fiddle with yours?

________________________________________

Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

it's 'off' when its at 0db

and a box? make one yourself, its easy, just make sure you use MDF with 15 or 18mm thickness. Use screws & wood glue.
Enclosures of the shelf are mostly ridiculously overpriced.

________________________________________

Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

that doesn't seem abnormal to me... like i said, it's only use is to 'boost' the curve (when looking at the frequencies in a diagram) around 45hz.

so when it's boosted you'll have more 'bass' (bass itself is between 20-80 hz +-, this ain't very scientific, but just to give you an estimate; thats why your better off putting all speakers on 80hz HP, around that or higher even)

you might understand while looking at this curve:

(if you have -db too, well then the curve would bend downwards, but that obvious, right?)


(btw, let me remind you that i'm not a native English-speaker, so once in a while i might misunderstand things )

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Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

excellent post dragoon this helps massively thanks. I think im understanding this now. I know you know your stuff with regard to this. Haha your english is fine mate i have to put up with worse at work and thats in this country.

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m

bulls**t , I guess you never had a decent 10" then (or 8" even)

(I've probably had or tried most possible and none-extreme setups; 6*9" just wont cut it bass-wise)

don't get me wrong, genesis is awesome SQ gear, but what you are stating isn't even technically possible...


Also, don't mix up kick/kickbass and bass, you'll probably have great kick though.

your setup is nice, but lacks a sub, end of story

________________________________________

Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

6*9" will rarely be able to (decently) create sound below 60hz, and 60hz+ is not exactly what I call 'bass'
(and not only me, see the bass-boost thing around 45hz)

concerning weight, you're even better off with a decent compo up front combined with a 8" sub than a compo combined with 6*9's, the stage is mostly in front of you anyhow, so you don't actually 'need' rear speakers (unless you prefer that surround effect off course, something I prefer myself)

________________________________________

Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi