Crutchfield Customer Review (What's this?)
I has a Retrosound model 2. So this review is only relevant if you own a Retrosound. Pretty much a plug and play. Yellow power wire to + battery terminal. Black ground wire to nearby metal car frame. Other wires use retrosound model 2 wire connectors. The Quad 4 is small and easy to hide under the dash. Restrosound model 2 is not a great stereo when it comes to sound so I feel the addition of the Quad 4 is a must. Sounds is full and richer at all volumes. Also love the retro look this system gives my 59 Porsche 356 replica. Awesome.
Pros: Compact. Plug and play with Retrosound model 2. Full rich sound.