Mr 1hawaii guy let me clarify to you what imprint is and what parts are involved.
the imprint is auto sound tuning by means of microphone and automatic equalization thru the imprint sound manager. so you dont have to do it.(in other words the imprint adjusts the settings for you)
CDA-9887
taken from alpine.com
Customize your Sound
If you like to tweak your sound, this is the head unit for you. It gives you 6 channels of Digital Time Correction, 3-way or 2-way crossover, 7-band graphic EQ or 5-band parametric EQ. You can manually toggle between the CDA-9887 default sound setting and IMPRINT to tune your sound the way you want.
comes with all the settings built in (also known as BASS ENGINE PRO in older units)
hence the different unit required for it:
KTX-100EQ IMPRINT Sound Manager is a calibration software kit designed for the exclusive use with the CDA-9887
cda-9886 and other imprint capable units
The CDA-9886 is IMPRINT ready – Just add an IMPRINT PXA-H100 audio processor for automatic sound tuning or powerful manual tuning options. Precise control and corrections yield enhanced sound so you can enjoy an optimal listening experience. IMPRINT automatically measures the entire listening area, capturing time domain and frequency response information from each listening location to process and improve the sound at every seat in your vehicle
so in other words other units come with BASS ENGINE not PRO like 9887
so they dont have 6channel time corection, 3 way crossover, parametric/graphic eq etc
they require the IMPRINT PXA-H100 module that has the BASS ENGNE PRO IN IT. and then it requires the KTX-h100 that has the software and microphone.
in other words
CDA-9886 + PXA-H100 + KTX-H100 = CDA-9887+KTX-100EQ
btw imprint modules dotn "unlock"ur unit, they add features to it thats all.