So how did it turn out? Two of the photos show the enclosure in the hatch, sitting in the space where the stock Bose subwoofer was located. The exterior of the enclosure has been covered with Herculiner, a roll-in bedliner material that is commonly used to finish subwoofer enclosures. This is a tough covering that will not be scratched up by items placed in the trunk. https://goo.gl/photos/EkJXJXtwvwFaoT799
With the rear seats folded down, the amplifier (top) and stiffening capacitor (bottom) are both visible, otherwise they cannot be seen from inside or outside of the car. Stiffening capacitors help transient response, and at $30 for a 1.5 Farad cap with a volt meter, why not use one? Looking in from the outside, especially with tinted windows, the subwoofer/amplifier/capacitor are not visible at all. Stealthy.
Acoustically, the subwoofer is blending very well with the rest of the Bose system. I am using the following settings on the Lanzar amp:
- High pass (subsonic) filter set at 10 Hz to allow for bass extension.
- Low pass filter is set for about 80 Hz, blends well with the front door speakers.
- Not using the 45 Hz EQ on the Lanzar. It is not needed, and it adds a noticeable artificial hump in the response.
The amp output is more than enough, even with the speakers wired as an 8-ohm load. This particular amp comes with a remote gain adjuster which I have mounted in a somewhat hidden location that I can reach from the driver's seat. Be careful with this amp, especially if you wire the speakers as a 2-ohm load. It has enough power to destroy these drivers.
The listening impressions so far are very good. The response is tight, not boomy. The transition from the subwoofer to the door speakers is close to seamless. And even though it is a SQ subwoofer, it has enough output to shake the rear view mirror and vibrate the interior panels of the car. I have the head unit base control set at one or two clicks above zero gain (middle) which is all it needs. I listened to several different types of music, like Donald Fagen, Norah Jones, Opeth, Return to Forever, Mark Knofler, The Police, Chick Corea, SOD, etc. etc. and they all sound good, only requiring a small adjustment on the remote gain (if at all).
So, though I would rather have something other than the stock head unit, such as a audiophile oriented Pioneer HU with time alignment and a 16-band EQ, I am pleased with how this system sounds and will be able to live with it as a daily driver. With the subwoofer integration, the Bose system sounds much better overall so I can live with it for now.
One can spend a lot more on subwoofer speakers and amplifiers, and if you like, go ahead, I get it. But, by my ears, and many others that have used the same components, the Lanzar drivers and Power Akoustic amp work very well, and the price is right. Mission accomplished!