Hi.
I have the stock CD Radio in my 2001
Firstly, if I want to wire-in some rear speakers, which pins do I use?
Is the Plug Socket by the Ariel socket, for a CD Multi controller?
Can anyone tell me the Audio unit Wire Colour Codes please?
Many thanks
Fraz - No indication of a CD multi-player connection - if that’s what you mean?
Right channel speaker wires are Green and Yellow/Green .
Left channel speaker wires are Yellow/black and Yellow/red.
1/2 - First colour (1) is main colour, Stripe (2) is always thinner.
With a Sport, tweeter colours are same as main speaker colour.
Impedance (ohms) of speakers are not indicated, so I can’t tell you what impedance your add-ons should be.
Impedance matching is important, and wrong choice can unbalance the output from the head unit, which may also introduce distortion. To be safe I would suggest you get higher impedance speakers, say between 8 and 16 ohm, though trial and error will produce the best result. Additional loading may also introduce distortion, as presumably the output from the head unit matches two speakers per channel.
My car was also built in 2001 (October time) but I don’t know what make the radio is, it works fine, so no need to investigate further.
HTH?
Thanks for your reply.
I guess I was really wanting to know which pins on the audio multi-plug are for the rear speakers?
I don’t think any wires are present from the factory.
Thanks again
Pins A and C are right channel.
Pins B and F are left channel.
O/K?
Is that for REAR speaker outputs?
And how can I tell the pin numbers?
Thanks
Pins showed are for existing speaker outputs. There are no pins that I’m aware of for possible rear speakers.
First model which had that provision was, I believe a later NBFL - with the rear board speakers. (part of the windblocker.)
As I didn’t understand your later post - “I don’t think any wires are present from the factory.” then the wires as indicated with colour code (as requested) should be on those pins. The manual shows connectors from the harness side (wiring side) so, with the keyway at the top, the four pins are top row, right hand side Top right pin is pin A, second pin - Pin C, third pin - Pin D, (NOT B, as indicated previously - sorry, letter is tiny) and fourth pin - Pin F. There’s lots of spare terminals indicated, but as far as I’m aware, pins are only fitted where an option has been selected. I have no indication of what any options are , or were offered.
So, the manual only shows existing wiring and connections, which is why I said impedance selection is important, assuming you would connect new speakers in parallel with the existing ones. Alphabetical numbering is shown in the manual, where letters are, frankly I have no idea. Colour codes given should help.
Sorry, I can’t explain anything beyond this, all I can give you is the information from the drawing.
My Radio is fine, no complaints, and I’ve never had it at full volume, - I’d soon go deaf.
Thanks for your reply.
On the OEM audio head set, there is a “fade” option in the settings (which in my experience means “fade from front to rear”) and there are pins in the back of the unit that are unused by the current audio wire harness.
This “fade” function is what I want to use, like on the MK1 models with additional speakers in the seat head rests & lumbar.
I recently saw an NB with seats from a MK1 installed and the “seat speakers” were able to use the “fade” function on the OEM head set.
I know it’s possible and the unit has provision for rear speaker connection but what I need to know, is which pins on the back of the unit.
Thanks
I don’t know if this is any help but Citroen C1s/Peugeot 107s/Toyota Aygos (bear with me) by default also come with a stereo that has a fade function but no rear speakers.
Many people, (including myself) have upgraded the stereo to attach rear speakers. The head unit has full fade/rear speaker functionality but the loom isn’t there for the rear speakers (neither are the speakers). The solution is to buy an ISO connector/adaptor from Halfords (etc), plug it in to the back of the stereo and then splice into the wires that now come out of the HU and are intended to go to the rear speakers but only meet a dead-end in the standard loom. All you have to do is run the wires to the new speakers and the unit will power the rear speakers perfectly.
If the Mk2 MX5 also has a HU with a connector that an ISO adaptor can be plugged in to, it’s a nice easy way to upgrade things. It doesn’t take long and there is no need to do anything to the existing wiring.
With standard ISO colouring, the rear speakers are green for one side and purple for the other (I forget which side is which).
When i fitted the mazda rear soundboard to my 2.5 i found it easier to buy a “mazda to iso” wiring harness and fit this between the headunit and car and then cut the rear wires from that and extend them to the rear if that makes sense. From memory the iso colours for rear right and left were purple and green. Youll then be able to play with the fade settings and get it sounding good.
Possible help here below
See link for pin outs, reckon U & V could be the ones.
https://www.miata.net/garage/nbaudio/index.html#Pinout
Also see here although some of the links are broken
https://www.miata.net/garage/nbaudio/index.html#2DINNB
I remember adding an head unit to my Mk2 and I needed an additional ISO lead to make it possible to add rear speakers which I did, it’s around 5 years ago since I did anything like this so my brain is a bit numb trying to remember how it all went but mine was a Mk2 98 model with the added probelm of Bose but I managed it.
Edit…
And as Andy says above (it’s all flooding back to me) you add the wiring to the harness and plug it all in. Thanks Andy I now remember.
Thanks MickAP - that’s exactly what I wanted to know.
Now, I can either jam some wires down the multi-plug to the rear speakers
or
I can get a Mazda to ISO adaptor (Thanks AndyMK2 & Enjay for your suggestions)
Problem solved
Thanks everyone
It’s worth doing, the rear speakers complement the stereo nicely.