Navone, David & Clark, Richard "Create Your Own Space With DSP" Car Audio & Electronics June 1991: 80-86.
https://farm2.staticflickr.com/1884/...5a020d07_b.jpg
https://farm2.staticflickr.com/1813/...c29efe82_b.jpg
https://farm2.staticflickr.com/1852/...a4a8f534_b.jpg
https://farm2.staticflickr.com/1813/...924560ba_b.jpg
https://farm2.staticflickr.com/1854/...0d8af0d3_b.jpg
https://farm2.staticflickr.com/1832/...15b80510_b.jpg
https://farm2.staticflickr.com/1878/...808316f2_b.jpg