HDC3 18 or 2 SDC2.5 15s

 

Gold Member
Username: Goodie_goop

Mid town, Texas U.S.

Post Number: 1220
Registered: Oct-06
Alright after getting prices on many different options...I have realized just how sh!tty getting equipment shipped to Alaska is...so this is what I have it narrowed down to:

Either a single 18" HDC3 or two 15" SDC2.5s.
Will be ported on 1200-1500 rms in my 2005 sierra 2500hd ext. cab.

I had a 12" HDC3 on 1000 rms a little over a year ago in a sealed off trunk car and it was pretty loud but I definitely want a louder SQL system.

So just how much better is the HDC3? Enough to choose a single 18 over two 15s? What would you guys do?

...Also I'll throw in the 18" Fi BL as its around the same price...

Only 18" I have owned previously is the Alpha v2
 

Platinum Member
Username: Rovin

1 15 = 153 DBs ...Trinidad & T...

Post Number: 16409
Registered: Jul-05
considerably more cone area with 2 15s ...
 

Silver Member
Username: Mittens08

Cleveland, Ohio USA

Post Number: 102
Registered: Jun-09
r u gonna run 1200-1500rms to both subs if u got the 15s? if not id get the 18 and run that wit 1500rms...i actually jus saw an ad on craigslist for an HDC3 18 in box for 300
 

Gold Member
Username: Deadrabit

Marionville, MO

Post Number: 2445
Registered: Jun-07
i would get the 15s... same subs i have. and i have had a lot of power to them and they are great
 

Gold Member
Username: Goodie_goop

Mid town, Texas U.S.

Post Number: 1221
Registered: Oct-06
Thats the total rms for both...but ya I was feeling the 15s more
 

Silver Member
Username: Boston_spl

Highland, CA United States

Post Number: 217
Registered: Nov-08
^x2
 

Platinum Member
Username: Insearchofbass

2 hifonics 2607s, 2dcSounds12xls SPL\idmax12SQ

Post Number: 14323
Registered: Jun-04
x3 if you have the room
 

Gold Member
Username: Goodie_goop

Mid town, Texas U.S.

Post Number: 1222
Registered: Oct-06
ya plenty of space...just need to get a box design now
 

Gold Member
Username: Deadrabit

Marionville, MO

Post Number: 2446
Registered: Jun-07
the sdcs take 600rms.. but really at 600 clamped they don't move to much. with 1000 to 1100 is when they really start to play.
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