View Full Version : Rainbow Germanium's or CDT ES-620z for front stage?

02-17-2009, 11:51 AM
Long story short I am doing my first REAL car stereo build and have all the components I need. I'm just trying to decide which front speakers to use. I have two sets of 6.5 components and two amps to choose from for the front stage.
Here are the components...

Speakers I have:
CDT Audio ES-620Z 6.5" comps
Rainbow Germanium 6.5" comps

Amps to choose from:
Zapco AG750
Sundown SAX 100.2

I'm 95% sure I want to use the Zapco amp up front because it has more raw power than the Sundown but can't decide which comps to go up front. Both are excellent speakers, but which ones would you use as the front stage and why? I am going to be doing rear speakers as well so whatever won't go up front will go in the back for rear fill. I do not want an only front stage system. This system is 100% SQ and not SPL.

BTW the rest of the system is
Pioneer DEQ-9200 audio processor
Alpine HU
2x 12" Hypnotic subs in custom sealed enclosure 1.7cf per chamber
Kicker Zx1500.1
Big 3 including a new 250 amp alt.
Car: 2002 Mustang GT

As always I value the opinions I have gotten on here and encourage your input good or bad. Thanks!!!

02-17-2009, 12:14 PM
Now i havent heard the CDT's but my brother has the germaniums and they sound amazing, they have a very natural airy sound to them, and are well defined. They also have pretty good midbass as well. I have the power series and I love how rainbow speakers sound personally

02-17-2009, 12:55 PM
Now i havent heard the CDT's but my brother has the germaniums and they sound amazing, they have a very natural airy sound to them, and are well defined. They also have pretty good midbass as well. I have the power series and I love how rainbow speakers sound personally

The Rainbow is a great speaker and I've heard other Rainbow series before. I bought the CDT blind off of recomendations from this site. The speakers and x-over look great.

I hate threads w/o pics so here are the pics for no reason at all....

The CDT's

The CDT x-over


Germanium x-over



02-17-2009, 03:13 PM
**** that zapco looks so nice & big, no one can say which is better for you.
but you can play with each set to find what sounds better to your ears

i like the tweeter on rainbows better
i like the mids on the cdt better

remember SQ is more than just about the speakers
good luck

02-17-2009, 03:15 PM
remember SQ is more than just about the speakers
good luck[/QUOTE]

Very good point, install is probably the most important aspect to the system

02-17-2009, 03:18 PM
You could also look for the CDT woofer abd crossover and buy a cal 25 or 26 tweeter separate and may be best of both worlds, but i guess it really depends on the crossover, it may be made for that tweeter, but it may be worth a shot

Rich B
02-17-2009, 03:22 PM
The crossovers on the Germs can be configured so much to help improve the sound I wouldnt even think about the CDT's if I had the Germs already on hand.

02-17-2009, 04:46 PM
why dont you go active,

02-17-2009, 05:11 PM
why dont you go active,

So to set up an active front stage I would need four powered channels up front, or in my case add another 2 channel amp one amp for the mids and one for the tweets correct? If I did that I'd get another Sundown SAX 100.2 amp. Now that would be a bad-*** front stage.

That DEQ-9200 has an amazing amount of features for fine tuning a system. That sound processor kicks some arse.

02-17-2009, 06:58 PM
yes you need one four channel amp or two two channel amp for the mids & tweeters

02-18-2009, 09:27 PM
i would grab the CDT better lowend extension and much more depth.. the Gs sound too airy and lite, almost thin...

02-18-2009, 10:14 PM
I just bought a pr. of es 600's for my back fill, I'm installing tomorrow. If I remember I'll post update tomorrow. Only the 6.5" mids are in the back, the 2nd set of tweets are in stock pods in an Is250. So it's only kinda rear fill. http://i230.photobucket.com/albums/ee149/boardroomjimmy/P9060029.jpg

02-18-2009, 11:53 PM

02-19-2009, 03:56 PM
i would grab the CDT better lowend extension and much more depth.. the Gs sound too airy and lite, almost thin...

This is what I found today when I installed my es600 mids. ( I assume they're the same as yours since they look identical) The cdt's are set @ 60hz and seem happy, while my alpine spx17's are up @ 80+. The alpines will bottom out set any lower. Of course the gains on the alps are set higher also, the cdt's are in the rear for fill. They do blend nicely with the sub.http://i230.photobucket.com/albums/ee149/boardroomjimmy/P2190182.jpghttp://i230.photobucket.com/albums/ee149/boardroomjimmy/P2190186.jpg

02-19-2009, 04:41 PM
newer ones es6 are really nice speakers.


02-21-2009, 12:29 AM
i have had germs, iw asnt impressed at all... in fact i hated them and just really left a bitter taste in my mouth... Made me stop eating speakers....

I have a set of $100 CDT Comps in my silverado right now and i love them.... I have not heard the cdts your looking at but i know there low end lines are absolutely amazing... i would for sure give them a shot... specially if your looking for any sort of loudness cause if you want any decent volume then the germs are gonna dissapoint.

02-22-2009, 08:11 AM
So boardroomjimmy, how did those CDT's sound?

I decided to go with the CDT mids up front with both the CDT AND rainbow germ tweeters (the second set will go behind the two front air vents) powered by the Zapco AG750.

Going to use the germ mids and a pair of infinity tweets fro the rear fill and pair that to the Sundown.

Thanks for all the suggestions guys, I can't wait to hear how this sounds. I should get my car back from my mechanic this week and the build begins :D

02-22-2009, 01:15 PM
so your going to have 2 sets of tweeters up from?

so i guess your useing cdt or rainbow passive xover?
i think cdt has an imaging tweeter output on that xover?,, that will work fine for imaging.

you should focus on your front stage,before adding your rear fill.

02-22-2009, 05:08 PM
The cdt's worked out perfect. I've got them running down to about 60hz and they're performing nicely. They fill in nicely between the alpine pro mids that are up front and my sub.(L7) The alpines make a lot of bottom end when allowed to go there, but would bottom out when pushed hard. So, I have them crossed over at about 85hz (amp setting) and are letting the cdt's pick up the rest. Since I've got the gains turned a little lower on the cdt's, it works perfect. The cdt's fill in with the sub, and the directional part of the mids are still coming from my front stage. I too am running 2 sets of tweets up front. The alpines are in the stock midrange mount in the door (see pic) and then I've got a pr of jl/vr's in the pods on top. The jl's are ran off of the pdx 150x2 running the cdt's, and set @ -2db on the passive x-over, so you mainly hear the alpine tweets. Overall the 2nd set of comps added a lot of volume to the system, and I still feel I've got good imaging up front. Now I'm rethinking my 10"L7......maybe a 12" alpine type x.

02-22-2009, 10:28 PM
you have a lot going on with your front stage, glad you like it.
how high is your stage height?
does your music sound like it's in front of you or on your dash centered in front of you?
so your useing those cdt more of as midbass?

before you buy that alpine-x maybe should around a little!




02-23-2009, 08:04 PM
I'm shure that some listeners would say the sound stage of my car is total crap. The mid bass is encompassing, not really focused in front or back. I can see where some would not like this effect. But, it hits hard and sounds tight. The j/l tweets sit @ the top of the door sill in the factory pods, and the alpines sit at about knee level aimed back at the drivers pos. There is not a focal point at the center of the windshield for the top end either. Instead it's between the tweets, about mid dash and across. Actually about what you would expect. The overall effect (focus) is foreward of the driver though, not to the rear. I'm 40 and have had plenty of systems in plenty of cars, this one is my favorite, and gets the loudest. The lexus is a nice quiet platform for the system. Maybe I'm getting deaf in my old age, but the alpines off of a JL 300/2 would not get loud enough for me. I know when speakers are at their limit, and the alpines were not gonna take any more than the 150 a side they were getting. Hence, another set of comps. I know plenty of you will disagree with this setup, but to my ears it works. I'll take into consideration your recommendations for the sub, thanks.

02-23-2009, 11:05 PM
I'd be one who would disagree w/ the setup. But whatever floats your boat...as long as you're happy w/ it, thats the only thing that matters.

02-24-2009, 12:33 AM
hey if it works for y outhen that all that matter

02-24-2009, 12:33 AM
you then thats all that matter ,