[Stream]

Hello.
I have had pre-LCI E90 with Stereo system, non-Idrive (BMW Professional). I have replaced stock speakers with Jehnert 3-way kit and then succesfully retrofited E70 Top-Hifi amplifier (AMPT70).

Retofit was easy as far as I already have MOST in trunk (CDC, ULF).
Just run wires, solder pins, code 677 option and set jumper on pins 1+2 in MOST socket of amplidier.

Now I have two problems:
1. Underseat woofers has no filtering (or at least it's not correct ) from AMPT70. Jehnert woofers now plays too high (>250hz) and too low (from ~ 30hz).
I have to lower 200hz on min and even then I have +3db peak on ~200hz.
I also have +3db peak on 40hz (car interior resonance), when Jehnert recomment HPF 60hz for their 8" woofers.

2. Low volume of PDC beeps. Front and rear - the same low. There are no PDC-Volume setting in head unit.

Question - is there are any parameters in RAD (RAD2) module such as PDC-Volume and X-Over freq\slope?

[makkan00]

Kudos to you for doing that.
Why was e9x L7 not used?
Unfortunately, you cannot tweak the amp xovers. Rad2 / 3 does not allow you to tweak it via coding.
Check the equaliser in the unit and use -db for 100hz.

[Stream]

Originally Posted by makkan00

Kudos to you for doing that.
Why was e9x L7 not used?
Unfortunately, you cannot tweak the amp xovers. Rad2 / 3 does not allow you to tweak it via coding.
Check the equaliser in the unit and use -db for 100hz.

This one was cheaper than E90 L7 amp (200$ vs 300$).

P.s. I don't know what IC used in E90 Logic 7 amp, but AMPT70 uses 7 dual channel class-D IC. AMPT70 have passive cooling, when E90 amp uses 2 40mm fans, so I guess E90 amp uses class-B IC, like E60 and E65.

[ctuna]

http://www.e90post.com/forums/showthread.php?t=1144129

The power IC chips are listed in entry 18 in the above thread.
The spec sheets are in the links in entry 18.

[Stream]

E90 L7:
2x75wt class-H
5x(2x25wt) class-B
all for (4R load) max power

E70 AMPT:
6x (2x80wt) class-D
(4R load) max power

[reisf]

Originally Posted by Stream

Retofit was easy as far as I already have MOST in trunk (CDC, ULF).
Just run wires, solder pins, code 677 option and set jumper on pins 1+2 in MOST socket of amplidier.

Mate could you please elaborate on this?

What additional wires did you run, What do you mean by solder pins and What's the jumper for pins 1 + 2.

Any pictures you have would be awesome. Been looking for this information for months.