So, I decided to go with an MTX Thunderform enclosure which MTX says won't work with a Denali. This has to do with the fact that there's the stock Lux amp mounted in the way. I found here on the forum, that that amp could be mounted in the compartment that's built into the panel. Then the jack that was mounted back there needed to be mounted under the hood, where a second battery would go, and the tool kit went under the 2nd row seats. I ended up with a JL Audio 10" sub and a Soundstream Picasso nano 450 watt monoblock amp. It sounds real real good. And it's complete stealth.
I followed this member's install. ( the member's name is justplayinn) Keep in mind this is for the Denali's only. The Thunderform enclosure is for a 10" sub and they offer the allowable dimensions for it on their website.
From member "justplayinn":
I ordered the thunderform hoping it would fit in my 2001 Denali... I hated the box in the back and wanted my cargo space back...And it worked!! Here a few pics i took on the install
![photo2.jpg photo2.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168290-a43392a002681ce55b5e66be70c5d211.jpg)
factory Bose sub and amp
![photo3.jpg photo3.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168291-b5e96a859950f9f7c2c10ee559b02a7b.jpg)
after all removed
![photo1.jpg photo1.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168292-16a3b7c3dac06688e7ce4fcfc22745c0.jpg)
replaced the MTX sub with the Polk MM1040
![photo31.jpg photo31.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168293-a5cdd34697a334aef6ab8cdce46aefc1.jpg)
cut a hole in the cubby and moved the factory Bose amp
![photo21.jpg photo21.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168294-223f887ba3e2e3e7296db1d0bb5296b8.jpg)
with cubby bracket installed
![photo51.jpg photo51.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168295-6ac639984038bf6c2bb3f358cf61a56c.jpg)
I followed this member's install. ( the member's name is justplayinn) Keep in mind this is for the Denali's only. The Thunderform enclosure is for a 10" sub and they offer the allowable dimensions for it on their website.
From member "justplayinn":
I ordered the thunderform hoping it would fit in my 2001 Denali... I hated the box in the back and wanted my cargo space back...And it worked!! Here a few pics i took on the install
![photo2.jpg photo2.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168290-a43392a002681ce55b5e66be70c5d211.jpg)
factory Bose sub and amp
![photo3.jpg photo3.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168291-b5e96a859950f9f7c2c10ee559b02a7b.jpg)
after all removed
![photo1.jpg photo1.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168292-16a3b7c3dac06688e7ce4fcfc22745c0.jpg)
replaced the MTX sub with the Polk MM1040
![photo31.jpg photo31.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168293-a5cdd34697a334aef6ab8cdce46aefc1.jpg)
cut a hole in the cubby and moved the factory Bose amp
![photo21.jpg photo21.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168294-223f887ba3e2e3e7296db1d0bb5296b8.jpg)
with cubby bracket installed
![photo51.jpg photo51.jpg](https://www.tahoeyukonforum.com/data/attachments/168/168295-6ac639984038bf6c2bb3f358cf61a56c.jpg)