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Dammit
Kyalami


Joined: 23 Sep 2016
Posts: 1936



PostPosted: Sat Nov 10, 2018 4:03 pm    Post subject: Reply with quote

How have you stopped it battering about back there - velcro'd it to the carpet or similar?
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Sat Nov 10, 2018 5:36 pm    Post subject: Reply with quote

Just for group knowledge, here's the Nokia M490 Amp, cabrio specific version:



Dimensions are 20cm wide, 16.5cm high and 4cm deep.

= It's quite a small amp.

I have been wondering about using the bracket that the CD Changer used to live in for a different amp - the changer being physically larger than the Nokia amp, it gives you more options I think.
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Halcyon
Imola


Joined: 02 Nov 2015
Posts: 788
Location: Somerset


PostPosted: Sat Nov 10, 2018 5:37 pm    Post subject: Reply with quote

the size and weight stop it rattling around - just a fortunate coincidence that it fits exactly!! I was going to use velcro, but didn't need to.
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Halcyon
Imola


Joined: 02 Nov 2015
Posts: 788
Location: Somerset


PostPosted: Sat Nov 10, 2018 5:49 pm    Post subject: Reply with quote

Dammit wrote:
Just for group knowledge, here's the Nokia M490 Amp, cabrio specific version:



Dimensions are 20cm wide, 16.5cm high and 4cm deep.

= It's quite a small amp.

I have been wondering about using the bracket that the CD Changer used to live in for a different amp - the changer being physically larger than the Nokia amp, it gives you more options I think.


I'm digging around for the photos.. but you can remove the amp from the bracket and EASILY fit a pair of those Pioneer amps in that location using the original mounting bracket (or JBL do a similar sized one) You can also use the power supply to that old amp, the signal feed, speaker wires etc. So it is the logical location as everything is there

Edited - found image
Link: https://1drv.ms/u/s!Ak7OTAfmTrHxv3hPyCUe8oyIDlxT

Ignore the rather messy wiring - this was mid fitting.
https://1drv.ms/u/s!Ak7OTAfmTrHxv3hPyCUe8oyIDlxT
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Sat Nov 10, 2018 6:11 pm    Post subject: Reply with quote

They are appealingly tiny, but would I not need three?
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Halcyon
Imola


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Location: Somerset


PostPosted: Sat Nov 10, 2018 8:20 pm    Post subject: Reply with quote

Dammit wrote:
They are appealingly tiny, but would I not need three?


why not six?! Very Happy Very Happy
But honesty? no. 1 in 4ch mode to drive the dash and rears, the other in 2ch mode to drive the doors

Hint / Tip:
Drive the door speakers with the RCA / phono front channel pre-out and set the amp to LF mode. and NOT from the sub out - it will sound better like that.
Then drive the slim sub from the sub out
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eabeukes
Silverstone


Joined: 30 Jan 2018
Posts: 127
Location: Aylesbury

1999 Porsche 996 Carrera 2

PostPosted: Sat Nov 10, 2018 8:37 pm    Post subject: Reply with quote

Halcyon - did you cut the speaker harness or buy an adapter?
 
  
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Halcyon
Imola


Joined: 02 Nov 2015
Posts: 788
Location: Somerset


PostPosted: Sat Nov 10, 2018 8:42 pm    Post subject: Reply with quote

eabeukes wrote:
Halcyon - did you cut the speaker harness or buy an adapter?


Installed a new speaker loom. Necessitated by the common ground system used by Porsche. But spliced back into the original loom, post the amp in the frunk as that's all "normal" wiring.
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Sat Nov 10, 2018 8:55 pm    Post subject: Reply with quote

Halcyon wrote:
eabeukes wrote:
Halcyon - did you cut the speaker harness or buy an adapter?


Installed a new speaker loom. Necessitated by the common ground system used by Porsche. But spliced back into the original loom, post the amp in the frunk as that's all "normal" wiring.


This may be a really stupid question, apologies in advance! - are you saying that the speakers only have a live running to them from the amp, and are grounded through the chassis?
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Halcyon
Imola


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PostPosted: Sat Nov 10, 2018 11:02 pm    Post subject: Reply with quote

[quote="Dammit"]
Halcyon wrote:

This may be a really stupid question, apologies in advance! - are you saying that the speakers only have a live running to them from the amp, and are grounded through the chassis?


Lol, no. The speaker loom from the head unit to the OEM amp location share a common ground so only use five wires instead of eight. Modern digital amps don't like it and you might lose the fader and / or balance functions. That's what happened to mine, so I replaced the loom.
From the amp on, they use standard 2 wires per speaker.
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Sat Nov 10, 2018 11:08 pm    Post subject: Reply with quote

Ah, ok - my boundless ignorance in play once more.

So you ran an entire new loom, or only three more earths?

It looked to me, earlier today, that it would be a ***** getting new wires through alongside the existing ones:


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Halcyon
Imola


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PostPosted: Sun Nov 11, 2018 12:28 am    Post subject: Reply with quote

8 wires with a standard ISO plug at the head unit end. I ran the wires through the bulkhead on the driver's side (along with the RCA leads) as it was much much easier to get through that way Thumb
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sp1ke
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Joined: 07 May 2009
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PostPosted: Wed Nov 28, 2018 5:57 pm    Post subject: Reply with quote

Halcyon wrote:
I have the Focal iBus25 but you're right - underseat is inaccurate - it's more like "rear foot-well"
Question


Would you mind sharing a pic of your Focal in situ? & have you been happy with it?

I'm mulling over the Focal ibus20 (only need the active sub, not the extra 2 ch amp) or a kenwood ksc-sw11.
 
  
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Mon Dec 03, 2018 9:56 am    Post subject: Reply with quote

Here's a link to how I installed some Hertx DCX 100.3's in the stock grills: http://www.911uk.com/viewtopic.php?p=1447088#1447088

I've ordered a pair of Hertz 130.5's for the doors as a winter project, which does mean that the amp will need to change, so much studying of wiring diagrams and headscratching to come.

I'd also be interested in a sub-seat-sub that could actually fit under the seat, if anyone knows of one?
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Mon Dec 03, 2018 10:04 am    Post subject: Reply with quote

sp1ke wrote:
Halcyon wrote:
I have the Focal iBus25 but you're right - underseat is inaccurate - it's more like "rear foot-well"
Question


Would you mind sharing a pic of your Focal in situ? & have you been happy with it?

I'm mulling over the Focal ibus20 (only need the active sub, not the extra 2 ch amp) or a kenwood ksc-sw11.


That Focal is 36cm*8cm*26cm (all rounded to the nearest cm).

I guess the first thing to do would be to make a mock-up from some cardboard and see if it fits in the space you have.
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Dammit
Kyalami


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PostPosted: Mon Dec 03, 2018 2:41 pm    Post subject: Reply with quote

Trying to gather information in one place.

Two plugs that go into the Nokia amp, large blue plug and small black plug as so:



And in the large blue plug I believe we have:

Pin #10 - yellow - (left dash +)
Pin # 20 - yellow brown - (left dash -)
Pin # 9 - red - (right dash +)
Pin #19 - red brown - (right dash -)
Pin #18 - Green - (left door +)
Pin #8 - Green Brown -( left door -)
Pin #17 - Purple - (right door +)
Pin #7 - Purple Brown - (right door -)
Pin#16 - White Brown (Rear Left - )
Pin#6 - White (Rear Left + )
Pin#15 - Blue Brown (Rear Right - )
Pin#5 - Blue (Rear Right +)

Pin # 2 - RED BLUE - Power
Pin #1 - BROWN - Earth or Ground

With the pins in this arrangement:





Which suggests that the inputs are in the small black plug.
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Last edited by Dammit on Wed Dec 05, 2018 9:56 pm; edited 4 times in total
 
  
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Dammit
Kyalami


Joined: 23 Sep 2016
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PostPosted: Mon Dec 03, 2018 2:42 pm    Post subject: Reply with quote

And based on what Halcyon said, we're likely to have 5 wires (four live, one shared ground) in the small black plug, leaving us needing to run three more grounds to make up each pair correctly.

Have I understood this correctly Halcyon?
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Dammit
Kyalami


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PostPosted: Mon Dec 03, 2018 3:16 pm    Post subject: Reply with quote

Replacement pins are 999 652 568 22

Does anyone know what tool is used for removing/inserting these?
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maldren
Österreich


Joined: 07 Oct 2016
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PostPosted: Mon Dec 03, 2018 4:33 pm    Post subject: Reply with quote

Hi Neil,
I retrofitted cruise and the extra pins I needed for that were simply pushed in. They had a small tang that can be pushed in to remove them.
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2003 996.2 C2 Coupe Arctic Silver
 
  
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Dammit
Kyalami


Joined: 23 Sep 2016
Posts: 1936



PostPosted: Mon Dec 03, 2018 7:16 pm    Post subject: Reply with quote

Ah- interesting. I might pick up an old amp and steal the connectors, Boxster units are 20-30 quid.

This kit (for an Alfa) looks to contain two Hertz 130.5's, am I going mad?

https://www.ebay.co.uk/itm/282903648852
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