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Luke997
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Joined: 20 Sep 2017
Posts: 11



PostPosted: Sun Jan 07, 2018 12:24 pm    Post subject: Adding a bose subwoofer Reply with quote

Looking to upgrade my non-Bose audio by adding a bose sub from eBay.
Have two choices;

Second hand parcel shelf Bose unit (albeit with a retrofitted non bose controller)

Or

997 convertible footwell subwoofer.

My initial thoughts are that the footwell woofer will be an easier install, and lighter, but are they any good and do they compromise passenger legroom?
 
  
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jonno_
Monza


Joined: 29 May 2014
Posts: 248
Location: Oxfordshire

2005 Porsche 997 Carrera 2S

PostPosted: Sun Jan 07, 2018 5:12 pm    Post subject: Reply with quote

I suppose it depends on how much you value OEM look v sound quality.
Bose is ok, but you might find your cash is better spent upgrading the existing speakers amp and head unit.

From memory the footwell unit takes some space, the coupe shelf unit doesn't really notice.
Guess either would need some sort of fitting kit and wiring.
Check your existing amp can power it ok as Bose trends to be an odd impedance.
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resigner
Suzuka


Joined: 19 Dec 2013
Posts: 1107



PostPosted: Sun Jan 07, 2018 5:33 pm    Post subject: Reply with quote

Don't bother. The problem is the 8" woofers in the front doors are underpowered. Power them right, and it sounds so much better. The speakers installed aren't bad quality, its just the install and setup is a bit mad and rubbish.

I changed my head unit, everything sounds so much better just from doing that, but a new amp would I am told be even better. To be honest, I get plenty of Bass just from that, in a cabrio, roof down, so depends how 'trevor from Harlow' you want to be........
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 13450
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Sun Jan 07, 2018 5:44 pm    Post subject: Reply with quote

Luke, Before you go to lots of expense, check your car has fibre optic cables as many non bose cars don't and bose equipment wont work without it. personally if you want the bose shelf I would be buying a bose shelf and retro fitting some good subs and stuff in it, fit something like a rainbow beats amp in the luggage area. you will end up with better sound than Bose Thumb
But the very first thing I would do is change your Amp as the OE one is the weak spot on these cars ,the speakers are not bad, then after doing that if you still want more then maybe put a slim sub under the seat. and then if needed change the speakers .

those are my 2 suggestions Thumb
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resigner
Suzuka


Joined: 19 Dec 2013
Posts: 1107



PostPosted: Sun Jan 07, 2018 5:46 pm    Post subject: Reply with quote

Good point Phil

Also, is the amp definately working as they do fail and you lose the bass. Really not uncommon!

Bose doesn't really make that much difference, it was more an 'upgrade' so Porsche could charge more........
 
  
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Phil 997
Brands Hatch
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Joined: 05 Dec 2015
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Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Sun Jan 07, 2018 6:08 pm    Post subject: Reply with quote

resigner wrote:
Good point Phil

Also, is the amp definately working as they do fail and you lose the bass. Really not uncommon!

Bose doesn't really make that much difference, it was more an 'upgrade' so Porsche could charge more........


ah true mate , my amp failed on the gen1 . fitted the rainbow beats amp and it completly changed the quality of the audio in the car. not audiophile but the cars not right for that type of quality anyway. but a very good sound.
I think to be honest better than the bose sound on my gen2.
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rob_p
Imola


Joined: 20 Oct 2013
Posts: 865
Location: Leicester


PostPosted: Sun Jan 07, 2018 6:47 pm    Post subject: Reply with quote

+1 for comments above.
I have removed my bose subwoofer after upgrading the rest of the audio.
I used a jbl 5 channel amp to power the existing speakers (including the door woofers).
After that, I really didn't need the bose subwoofer, plenty of bass as it is.

Also - the bose stuff is unnecessarily complicated - funny ohmage etc.

If you do add a sub - follows Phil's advice and stick a proprietary one under the seat.
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Jeep Grand Cherokee WK2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 
  
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DucatiRob
Barcelona


Joined: 22 Jul 2015
Posts: 1327
Location: Milton Keynes

2006 Porsche 997 Carrera 2S

PostPosted: Sun Jan 07, 2018 6:48 pm    Post subject: Reply with quote

If it is sound quality your priority then don't even consider the Bose unit, it is not a subwoofer! It has very small, 4 - 5 inch drivers and very cheap ones at that, they are not able to reproduce true low frequency signals. If you do go this route, I would source some decent quality drivers to replace the Bose items.

I am in the process of replacing my complete Bose system (a big job Surprised ), all of the drivers I have removed are very flimsy units, the amp itself is not very substantial and would not be able to drive 13 high quality speakers anyway.

There is not much space in a 911 for a subwoofer box anywhere other than where the Bose unit is located, I am building my own unit to fit this space, albeit slightly larger to fit two 8 inch subwoofers, as well as the new amp and crossover units!
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silvermilnec
Barcelona


Joined: 20 Feb 2012
Posts: 1389
Location: Leeds West Yorkshire


PostPosted: Sun Jan 07, 2018 10:10 pm    Post subject: Reply with quote

I remember swapping everything out of my old 996 when it had no bose. I upgraded front and door speakers and added a good amp, I didn’t bother with the sub it’s only a small cab and enough base anyway.

I have bose in the turbo but prefer to listen to the Kline Very Happy
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Luke997
Newbie


Joined: 20 Sep 2017
Posts: 11



PostPosted: Mon Jan 08, 2018 10:20 pm    Post subject: Reply with quote

Ok thanks all, any recommendations on an amp? Will also look at putting a proper kenwood unit in.
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 13450
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Mon Jan 08, 2018 10:49 pm    Post subject: Reply with quote

Luke997 wrote:
Ok thanks all, any recommendations on an amp? Will also look at putting a proper kenwood unit in.


I used a rainbow beat 2 amp that and the alpine head unit worked well ,but I am sure there are lots of good options Thumb
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DucatiRob
Barcelona


Joined: 22 Jul 2015
Posts: 1327
Location: Milton Keynes

2006 Porsche 997 Carrera 2S

PostPosted: Mon Jan 08, 2018 11:01 pm    Post subject: Reply with quote

Phil 997 wrote:
Luke997 wrote:
Ok thanks all, any recommendations on an amp? Will also look at putting a proper kenwood unit in.


I used a rainbow beat 2 amp that and the alpine head unit worked well ,but I am sure there are lots of good options Thumb


As Phils said, Rainbow make some good stuff, I've bought a set of their two way drivers for the rear as they fitted very neatly and good quality, but there are lots of options, depends if you want an amp to power the whole system or just the sub? Rockford Fosgate make some good sub amps! I am in the process of swapping out everything and will post up a thread with pics etc. soon!
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-- 997 --
Suzuka


Joined: 11 Jun 2015
Posts: 1006



PostPosted: Mon Jan 08, 2018 11:19 pm    Post subject: Reply with quote

Why not get a BOSE subwoofer, gut it out, fit a crossover to lower the frequency in Analog form and fit X2 8 inch Subwoofers to a good quality amp and wire the subwoofers in series giving you 2ohms output for real RMS and not watts for a better quality output, then and control that from the head unit, regards to the footwell subwoofer, you can forget that, I've seen it and there is no space what so ever for the passengers feet at the back and to be honest it looks hideous !!!!

Cheers

J
 
  
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resigner
Suzuka


Joined: 19 Dec 2013
Posts: 1107



PostPosted: Tue Jan 09, 2018 10:56 am    Post subject: Reply with quote

Phil 997 wrote:
Luke997 wrote:
Ok thanks all, any recommendations on an amp? Will also look at putting a proper kenwood unit in.


I used a rainbow beat 2 amp that and the alpine head unit worked well ,but I am sure there are lots of good options Thumb


Was that a direct replacement for the existing amp or did you have to rewire things? I have a feeling my amp is on its way out again and can't see why I would put another'known to be crap and fails' porsche amp back in!
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 13450
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Tue Jan 09, 2018 1:32 pm    Post subject: Reply with quote

resigner wrote:
Phil 997 wrote:
Luke997 wrote:
Ok thanks all, any recommendations on an amp? Will also look at putting a proper kenwood unit in.


I used a rainbow beat 2 amp that and the alpine head unit worked well ,but I am sure there are lots of good options Thumb


Was that a direct replacement for the existing amp or did you have to rewire things? I have a feeling my amp is on its way out again and can't see why I would put another'known to be crap and fails' porsche amp back in!


The stock Amp is a tiny thing so really no room to replace it in the location it came from, as I had removed all the PCM bits the space in the frunk where the dvd drive was located on mine it was just under the centre plastic lid with access also from the forward facing lid the Rainbow fitted in there nicely and the wiring was re routed from the original amp so no major rewiring needed.
it all worked very well with my Alpine head unit , Also it gave easy access to adjust the rainbow from its top controls to get it set perfectly for me , which from what I remember was at about 50/60% Thumb My OE amp had packed up completely and the only reason I was getting any music with virtually no bass was due to the built in Amp in the alpine trying to compensate.
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resigner
Suzuka


Joined: 19 Dec 2013
Posts: 1107



PostPosted: Tue Jan 09, 2018 4:41 pm    Post subject: Reply with quote

So you now just have that amp. Interesting. Mine is working when I start out, then cutting out and losing all the bass at points, usually after about 45 minutes. Seem to remember the last one did the same thing, getting worse and worse, then failing completely. Last one was done under warranty, dont have warranty anymore because I changed the stereo!

Would you mind giving me the exact model number etc of your new one?

cheers
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 13450
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Tue Jan 09, 2018 6:59 pm    Post subject: Reply with quote

It was on my gen1 mate and stayed on it when I brought the gen2 but it was this one the beat 2

https://www.rainbow-audio.de/en/amplifier/beat/


http://www.ebay.co.uk/itm/Rainbow-Beat-2-Two-Channel-Amplifier-2-Channel-Amplifier-360-Watt-RMX-/263327652834?_trksid=p2385738.m4383.l4275.c10
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resigner
Suzuka


Joined: 19 Dec 2013
Posts: 1107



PostPosted: Tue Jan 09, 2018 7:41 pm    Post subject: Reply with quote

So the head unit powered the other speaks and the amp the sub(s)?
 
  
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Phil 997
Brands Hatch
Brands Hatch


Joined: 05 Dec 2015
Posts: 13450
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Tue Jan 09, 2018 8:29 pm    Post subject: Reply with quote

resigner wrote:
So the head unit powered the other speaks and the amp the sub(s)?


I cant remember exactilly how I set it up mate I am sure the amp powered the mids in the doors etc and the headunit amp may have done the tweaters bloody old age mate just cant quite remember Grin it was a non bose car
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Last edited by Phil 997 on Tue Jan 09, 2018 8:30 pm; edited 1 time in total
 
  
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DucatiRob
Barcelona


Joined: 22 Jul 2015
Posts: 1327
Location: Milton Keynes

2006 Porsche 997 Carrera 2S

PostPosted: Tue Jan 09, 2018 8:30 pm    Post subject: Reply with quote

-- 997 -- wrote:
Why not get a BOSE subwoofer, gut it out, fit a crossover to lower the frequency in Analog form and fit X2 8 inch Subwoofers to a good quality amp and wire the subwoofers in series giving you 2ohms output for real RMS and not watts for a better quality output, then and control that from the head unit, regards to the footwell subwoofer, you can forget that, I've seen it and there is no space what so ever for the passengers feet at the back and to be honest it looks hideous !!!!

Cheers

J


You will not fit an 8 inch driver into the stock bose unit, it's just not big enough. The drivers are very small and the plastic enclosure would not be worth modifying. I am having to remake the subwoofer enclosure completely to accommodate 2 x 8 inch units, which is over the top for the size of the cabin but 8 inch are about the smallest subwoofer drivers easily available.
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