BMW E46/4 HK Amplifier
8-channel HK Amplifier
So I took apart my stock stereo amp. I was amazed
that it's actually a true 8 channel amp although the non-HK system uses a 10
channel amplifier. Each speaker in the car is individually driven by its own
amplifier except for the front door tweeter and midrange are passively crossedover.
The HK system does have another amplifier mounted to the subwoofer assembly.
BMW 65.12-06 920 996 01
E46/4
The amp uses four stereo single chip amplifiers by NXP, TDA8563Q 2x40W (into 2 Ohms). Each chip is has two independant amplifiers inside. I have arbitrarily numbered then #1-4 in the picture below.
Amplifier Connections for HK system. Located in the rear left side of the trunk
X605 | Description | Wire Size and Color |
5 | Fuse 41 - 30A | 2.5 RT/GN |
38 | RADLV+, Left Front Input+ | 0.75 Yellow/Red |
30 | RADLV-, Left Front Input- | 0.75 Brown/OR |
9 | RADRV+, Right Front Input+ | 0.75 Blue/Red |
17 | RADRV-, Right Front Input- | 0.75 Brown/OR |
37 | RADLH+, Left Rear Input+ | 0.75 Yellow/Black |
29 | RADLH-, Left Rear Input- | 0.75 Brown/OR |
8 | RADRH+, Right Rear Input+ | 0.75 Blue/White |
16 | RADRH- Right Rear Input- | 0.75 Brown/OR |
26 | GROUND | 2.5 Brown |
10 | ANTENNA | 0.5 White |
33 | HLV+, Left Front Tweeter+ (HLV&MLV) | 0.5 Yellow/Red |
34 | HLV-, Left Front Tweeter- | 0.5 Yellow/Brown |
40 | MLV+, Left Front Mid-Range+ (HLV&MLV) | 0.5 White |
39 | MLV-, Left Front Mid-Range- | 0.5 Blue/White |
4 | TLV+, Left Front+ | 1.5 Blue/White |
3 | TLV-, Left Front- | 1.5 Blue/Brown |
31 | MTHL+, Left Mid-Range+ | 0.5 Yellow/Black |
32 | MTHL-, Left Mid-Range- | 0.5 Yellow/Brown |
2 | LH+, Left Rear+ | 1.5 Yellow |
1 | LH-, Left Rear- | 1.5 Brown |
11 | HRV+, Right Front Tweeter+ (HRV&MRV) | 0.5 Blue/Black |
12 | HRV-, Right Front Tweeter- | 0.5 Blue/Brown |
42 | MRV+, Right Front Mid-Range+ (HRV&MRV) | 0.5 Green |
41 | MRV-, Right Front Mid-Range- | 0.5 Blue/Green |
23 | TRV+, Right Front+ | 1.5 Blue/Red |
22 | TRV-, Right Front- | 1.5 Blue/Brown |
13 | MTHR+, Right Mid-Range+ | 0.5 Yellow |
21 | MTHR-, Right Mid-Range- | 0.5 Blue/Yellow |
25 | RH+, Right Rear+ | 1.5 Blue |
24 | RH-, Right Rear- | 1.5 Brown |
7 | SUB_ON, (X18774-2) | 0.5 WS |
19 | TAA, Speedometer Signal (X18774-7) | 0.35 SW/GN |
20 | TAA, Speedometer Signal to instrument cluster | |
6 | SUB_IN+, Out+ to subwoofer amp (X18774-1) | 0.5 GN |
14 | SUB_IN-, Out- to subwoofer amp (X18774-6) | 0.5 BL/GN |
15 | RKL, Spacial Sound Button |
The amp uses four stereo single chip amplifiers by NXP, TDA8563Q 2x40W into 2 Ohms, but, more realistically it's more like 20 Watts per channel into 3 Ohms.
HLV and MLV are wired together and are coming off the amplifier chip #2 left
TLV is coming off the amplifier chip #3 left
MTHL is coming off the amplifier chip #1 left
LH is coming off the amplifier chip #4 left
HRV and MRV are wired together and are coming off the amplifier chip #2 right
TRV is coming off the amplifer chip #3 right
MTHR is coming off the amplifier chip #1 right
RH is coming off the amplifer chip #4 right