i can help a little.....prices not from DD directly..but from a good dealer im sure you would buy it from if you were getting it new... These are 15's The DVC 1ohms run a little more money then other standard configs..
DD9515 DVC 1ohm 645$ DD9915 DVC 1ohm 1040$ DD9915 DVC1.5 or DVC 2 960$ DD Z1 around 1350$
Prices may vary a little bit because when i priced it it was for 2 Z1's and 2 9915's but i decided to go with the 9500's instead... save me the other 2000$ in amps\power i would need for the second sub... not including the 2000$ i would need to spend on just the one sub to power it...not including price of sub either...expensive huh?
lol ya but for that price i think you can easily find a amp that will do the same if not more power.... as long as the thd isnt audible to the human ear or weaken the SPL, but im sure its a awesome amp.
oh and theres just something about the ddz1 that makes me want it lol At 4ohms and 0.1% THD it was doing over 1750w. At 2ohms it was doing over 3550w @ 0.1% THD. This was in a recent magazine test by PAS Mag. thats part of it so the 3k rms at 1 ohm musta been conservitive lol
But what voltage was the power supply? Most of those i have seen were at 14.5V, but also seen they handle more then that, the most ive seen (forget what forum) i think it was a DD forum actually, was at like 15.5V hard to maintain voltage like that... so unless you have a mean charging system i highly doubt you will get the 6-7K rms, but what i am not sure of is if it is actually stable for daily driving at 1ohm, as the website last time i looked only had specs for 2ohm. But all in all its a badass amp as long as its installed right, but deffinetly bad@ss for comps.
go to realm of excursions site. then click on components on the top. next click amp guts. go to DD Z1 and Z2. that will compare them. the Z2 is only for comps I'd say. it cant run a 1 ohm load on 12.5V, it shuts down. the Z1 however can. if your looking for a daily amp I'd go with the Z1. you cant complain about the power lol. at 1 ohm you could easily run 2 9500 series subs.