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When to select 2 channel

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Pbondar

When to select 2 channel

Post by Pbondar » Mon Jul 13, 2020 8:48 pm

Keep calm..no worries ..I’m suggesting that the head unit RF+ RF- goes to one channel and LF- LF+ to the other as per manual

Then you wire the AS3+ speakers to the bridged stereo outputs as per picture with switch in with 2 channel mode

The headunit rear outputs go direct to rear speakers

I think that works..

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Z4C_er
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When to select 2 channel

Post by Z4C_er » Mon Jul 13, 2020 10:03 pm

So this. Which is exactly what I have now, except I haven't flicked the switch yet.
RR SPK WIRING 2.JPG
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2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Tue Jul 14, 2020 9:36 am

That will work but will not take advantage of bridge option on the power output side....almost there..

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 9:43 am

Pbondar wrote: Tue Jul 14, 2020 9:36 am That will work but will not take advantage of bridge option on the power output side....almost there..
Thanks again. Would you mind drawing what you mean?
2006.5 E86 Z4C si SE Phoenix Yellow

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 11:14 am

My last try before I kill myself.
RR SPK WIRING 3.JPG
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2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Tue Jul 14, 2020 11:17 am

Grasshopper you have found the divine path to true enlightenment.. :thumbsup:

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 11:25 am

Pbondar wrote: Tue Jul 14, 2020 11:17 am Grasshopper you have found the divine path to true enlightenment.. :thumbsup:
I can put away the shotgun, master?
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2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Tue Jul 14, 2020 11:36 am

Well I would just un-cock it at the moment..

Let me know how it goes..are you hand cutting the cables or do you have a harness that can work?

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 11:42 am

Pbondar wrote: Tue Jul 14, 2020 11:36 am Well I would just un-cock it at the moment..

Let me know how it goes..are you hand cutting the cables or do you have a harness that can work?
It comes with a complete harness, so I am hand cutting and soldering cables back together. It's only a few cables to undo and rejoin.
1004.jpg
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2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Tue Jul 14, 2020 11:50 am

OK that works...maybe purely for test purposes use a temp connector on the speaker cables pending a sound check..but if all ok then definitely solder and insulate well then..these babies if instructions followed are quite good..

https://uk.rs-online.com/web/p/solder-s ... lsrc=aw.ds

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 11:58 am

Pbondar wrote: Tue Jul 14, 2020 11:50 am OK that works...maybe purely for test purposes use a temp connector on the speaker cables pending a sound check..but if all ok then definitely solder and insulate well then..these babies if instructions followed are quite good..
Yeah, I'm old school. I do the twisty connection and then solder it.
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2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Tue Jul 14, 2020 12:09 pm

That’s how I did do it but started using these as you get a good clamp action on the insulation from the heat shrink plus they seem to solder well and seal the joint against water ingress plus a heat gun works well..I then bury it all in heat shrink..should be able to take 45+G no worries :thumbsup:

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When to select 2 channel

Post by Z4C_er » Tue Jul 14, 2020 12:17 pm

Pbondar wrote: Tue Jul 14, 2020 12:09 pm That’s how I did do it but started using these as you get a good clamp action on the insulation from the heat shrink plus they seem to solder well and seal the joint against water ingress plus a heat gun works well..I then bury it all in heat shrink..should be able to take 45+G no worries :thumbsup:
Yeah, never used those before. Of course, BTW I heat shrink after.
2006.5 E86 Z4C si SE Phoenix Yellow

Pbondar

When to select 2 channel

Post by Pbondar » Wed Jul 15, 2020 8:02 am

Grasshopper..be aware that the line voltage from the headunit is around 2.5v not 600mv..so according to your amp manual you need to use speaker input not rca phono input..not clear to me how that works since it seems to go the same inputs..

Class D amp create massive harmonics if overdriven especially on the input side..destroys tweeted in seconds..

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When to select 2 channel

Post by Z4C_er » Wed Jul 15, 2020 9:37 am

Pbondar wrote: Wed Jul 15, 2020 8:02 am Grasshopper..be aware that the line voltage from the headunit is around 2.5v not 600mv..so according to your amp manual you need to use speaker input not rca phono input..not clear to me how that works since it seems to go the same inputs..

Class D amp create massive harmonics if overdriven especially on the input side..destroys tweeted in seconds..
Yes, thanks, I'm using the speaker line inputs connected via the adapter loom. Yes, it's designed to take inputs from either RCA or line-in, so don't know how it regulates it. But it must I guess.
This is from Pioneer:
"The GM-D1004 automatically detects input signals, and selects an input signal mode between the RCA level and the speaker level."
I read last night that when someone bridged their amp, it changed the control from 'balance' to 'fade'. Will that happen to me?
2006.5 E86 Z4C si SE Phoenix Yellow

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