I already have a nos ge5670. They are only 10-15.00 anyway. But that is a nice bonus. Anyone knows how long the warranty is on the mav. If it is in fact the same oem one, I might still be interested in the mav because the black chassis just looks much better to me(and all of my components are black). It still concerns me that the seller had not responded to the three emails I sent inquiring about it. I did find out how to bypass the preamp if anyone's interested. It's just as simple as changing a plug around on the inside. Grant fidelity has detailed instructions with pics on their website. It's a shame they would charge 25.00 to do a two minute job.