which amp should i go with?

I don't know about the other ones you listed but i've had a diamond d5 1200.1 running two tdx subs for the past 3 years and its a very good efficient (sp) amp. I spoke to an engineer at diamond and he said that the 1200 usually puts out about 1500 watts. He told me that it is not a fully regulated power supply but a semi-regulated one. They put out full power at 11.5 volts.
Your WAY WAY underpowering your TDXs

FYI...........

Diamond best engineers left years ago now they have turned into

a company of chinese importers -

They need a new Webdesigner too,the website is a JOKE,(rant)

 
The d5 1200.1 has become my backup amp for my vehicles in case i have a problem. The tdx's are now powered by a soundstream xxx-6500 and they really get busy in the back of the denali. I'm thinking about adding 2 more tdx's and see how that will work. The only problem with the soundstream is that its long as shit and i dont have a bench seat in the denali (it hangs out a little) I'm considering two exile 2400.1's or two american bass 200.1's. I wish that diamond made something in the 2000 watt range.

 
The d5 1200.1 has become my backup amp for my vehicles in case i have a problem. The tdx's are now powered by a soundstream xxx-6500 and they really get busy in the back of the denali. I'm thinking about adding 2 more tdx's and see how that will work. The only problem with the soundstream is that its long as shit and i dont have a bench seat in the denali (it hangs out a little) I'm considering two exile 2400.1's or two american bass 200.1's. I wish that diamond made something in the 2000 watt range.
they were supposed to make a D92000.1,I dont know what happend

they are a company thats a mess..........

I heard the Diamond Denali in person and it had 3 TDXs ,so I went out and sold all my junk *** subs and Ebay shopped for TDX's -

I run one in my little car and I love it

 
Yeah I was waiting on the 2000 watt amp from them and it never came. My friend is a diamond dealer and he's having all kinds of problems getting product from them. I really would like to do 4 tdx's in my truck I think they sound great. People can't believe that i only have 2 twelves in the ride.

 
Diamond is not exactly looking good on thier website.....

I dont know whats up with them,I dont think they are going out of biz

though,they have alot more business besides car audio which is a small

part of what they sell

 
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