Here is a list of pre-out voltages of popular head units. It also shows the pairs of pre-outs. This list was gathered from info on the HU's website. It does not include all models(if I didnt know it, I didnt post it) so if it is not on this list and you know the FACTUAL voltages of certain HU's, please post it here and it will be added to the list. Please be positive if you list a HU. This list also does not include flipouts and DD's. Again, If you know it, post it. I know there are many more so all input will be appreciated.
Alpine:
CDA-9887-------4v-3 pairs of P/O
CDA-9885-------4v-3
CDA-9883-------2v-3
CDE-9881-------2v-3
CDE-9873-------2v-2
CDE-9870-------2v-1
iDA-X001-------2v-3
Pioneer:
DEH-P2900MP----2.2-2
DEH-P3900MP----2.2-3
DEH-P4900iB----4v-3
DEH-P5900iB----4v-3
DEH-P6900UB----4v-3
DEH-P7900BT----4v-3
DEH-P9800BT----5v-3
Pioneer Premier lineup:
DEH-P980BT-----5v-3
DEH-P980BT-----5v-3
DEH-P790BT-----4v-3
DEH-P690UB-----4v-3
DEH-P590IB-----4v-3
DEH-P490IB-----4v-3
DEH-P390MP-----2.2v-3
Kenwood:
KDC-MP3035-----2v--3
KDC-MP535U-----2.5-3
KDC-MP635------2.5-3
KDC-MP735U ----2.5-3
Excelon lineup:
KDC-X491-------4v-3
KDC-X591-------4v-3
KDC-X791-------4V-3
KDC-X891-------5V-3
KDC-X991-------5V-3
Eclipse:
CD1000---------2.5-2
CD2000---------5v-3
CD3100---------5v-3
CD5100---------5v-3
CD7100---------8v-3
JVC:
KD-NX5000-----2.5-2
KD-AVX11------2.5-2
KD-AVX33------2.5-2
KD-DV7300-----2.5-1
KD-DV5300-----2.5-1
Clarion:
DB175MP-------1.8-1
DXZ275MP------1.8-1
DXZ375MP------3.6-2
FB275BT-------2v-2
DXZ475MP------3.6-2
DXZ575USB-----5.7-3
DXZ675USB-----5.7-3
DXZ775USB-----5.8-3
DFZ675MC------2v-2
Alpine:
CDA-9887-------4v-3 pairs of P/O
CDA-9885-------4v-3
CDA-9883-------2v-3
CDE-9881-------2v-3
CDE-9873-------2v-2
CDE-9870-------2v-1
iDA-X001-------2v-3
Pioneer:
DEH-P2900MP----2.2-2
DEH-P3900MP----2.2-3
DEH-P4900iB----4v-3
DEH-P5900iB----4v-3
DEH-P6900UB----4v-3
DEH-P7900BT----4v-3
DEH-P9800BT----5v-3
Pioneer Premier lineup:
DEH-P980BT-----5v-3
DEH-P980BT-----5v-3
DEH-P790BT-----4v-3
DEH-P690UB-----4v-3
DEH-P590IB-----4v-3
DEH-P490IB-----4v-3
DEH-P390MP-----2.2v-3
Kenwood:
KDC-MP3035-----2v--3
KDC-MP535U-----2.5-3
KDC-MP635------2.5-3
KDC-MP735U ----2.5-3
Excelon lineup:
KDC-X491-------4v-3
KDC-X591-------4v-3
KDC-X791-------4V-3
KDC-X891-------5V-3
KDC-X991-------5V-3
Eclipse:
CD1000---------2.5-2
CD2000---------5v-3
CD3100---------5v-3
CD5100---------5v-3
CD7100---------8v-3
JVC:
KD-NX5000-----2.5-2
KD-AVX11------2.5-2
KD-AVX33------2.5-2
KD-DV7300-----2.5-1
KD-DV5300-----2.5-1
Clarion:
DB175MP-------1.8-1
DXZ275MP------1.8-1
DXZ375MP------3.6-2
FB275BT-------2v-2
DXZ475MP------3.6-2
DXZ575USB-----5.7-3
DXZ675USB-----5.7-3
DXZ775USB-----5.8-3
DFZ675MC------2v-2