[kpk02]

The rear doors are actually a sort of compact component setup. The tweeters are mounted with the woofers but separate. I guess it makes sense. If the front two tweeters count then these would as well.

Here's a pic from somewhere else on these forums (found through google image search so I don't know which thread):

 

[bradze]

subaru counts the coaxial speakers in the rear doors as 4, actually a lot of manufacturers do this as marketing bullshit.

 

[OBnube]

The DSP used in the HK system doesn't give much output to the rears. They are for filler. Even when "faded" more to the rear they are lacking. Also any rear fading negativly impacts the front soundstage a great deal. The more fade the worse the fronts sound.

 

[namvet]

The rear door speakers get no bass from the amp (cuts off around 500 Hz).

Front door speakers are woofers only. The signal to them cuts out above 500 Hz.

 

[botenredwolf]

Sounds similar to the "11 speaker" McIntosh system that was in my car. Also, using the front doors as midbass only and putting all the imaging up in the dash makes a lot of sense acoustically since the lower frequencies are non-directional, you can't really tell much where they're coming from.

 

[NinjaTurtle2.5]

I purchased the HK system for better sound. It just gave me more to replace and more work to do.

 

[_karu_]

Haha, I just had the same exact question on my 2010 Outback with HK.

 

[kwisatzAK]

Jeremy

I was thinking of adding an amplifier and box with subwoofers to my 2013 Outback Limited with HK sound (no Nav). But i worry Car Toys is going to tell me "you don't have RCA outputs, and you need a new head unit".
Is the stock stereo going to be able to provide enough power output to not need to upgrade the head unit? I don't want to pull the stereo until i know what is back there....

 

[lashlee]

There are no RCA style connections on the OEM H/U, but you can purchase a Line Output Convertor (LOC) that converts speaker level signal to an RCA connector that is compatible with most any amp. The easiest solution for most people is to replace the H/U with an aftermarket solution, but everyone has there own opinion.