Sub not kicking it hard enough. Why??

 

New member
Username: Wireaudio

Wood Dale, ILLINOIS USA

Post Number: 1
Registered: Apr-05
Hi!
I just got myself a Lanzar OPTI1232D with these specs (don't get me wrong, this thing is a work of art):


Custom Tooled Die-Cast Aluminum Basket
Aluminum Alloy Cone Structure
Massive Butyl Rubber Surround
3' High Temperature Dual Voice Coil
50 Oz x 3 High Density Barium Ferrite Magnet
Power Handling: 750 Watts RMS/1500 Watts Peak
Frequency Response: 26- 800 Hz
Impedance: 2 Ohms DVC
Efficiency: 88dB
Includes Installation Hardware and Template


I am trying to hook this up to an Blitz Audio amplifier with these stats:
2400 Watts Mono Block Subwoofer Amplifier
1 Ohm Stable
MOSFET Power Supply
PWM (Pulse/Width/Modulation) System
Glass Epoxy PCB
Remote Turn On/Off
Gold RCA Inputs
Custom Terminal Block for Speaker Connection
Thermal, Overload and Short Protection
Input Impedance: 10k Ohms
Variable Subsonic Filter (15Hz~40Hz, 24dB/Octave)
Phase Control 0-180 degree
Remote Bass Boost
Heavy Duty Powder Coated Heatsink
Neon Light
S/N Ratio: >90dB
Anti-Thump Turn-On
Dimensions: 10.9''W x 2.67''H x 15''L

Also, here's more detail:

14.4 VDC 50Hz:
RMS AT 4 OHM: 400W MONO
RMS AT 8 OHM: 800W MONO
RMS AT 1.3 OHM: 1200W MONO
MAXIMUM POWER OUTPUTS: 2400 W MONO


The problem is that this sub is not hitting hard enough. As soon as i hit a volume of "24" out of "36" that my stereo can go up to, i can feel the vibration preety well, but the amp stops working!!! like it dies out on me for a second!
I hooked it up by bridging the 2 channels together, then connecting those to the bandpass box inputs and from there one wire goes to the plus on the sub coil 1, one goes to - on sub coil 2, then i ran a wire from coil 2 - to coil 2 +. Is this right? since this one is a 2 ohm woofer and the amp is 1.3, 2 or 4... am i doing something wrong here?
Please help!
 

New member
Username: Wireaudio

Wood Dale, ILLINOIS USA

Post Number: 3
Registered: Apr-05
Come on guys a little help here!
 

Silver Member
Username: Kojak28

Augusta, GA USA

Post Number: 123
Registered: Feb-05
If you wired the sub parallel ( both voice coils' negatives together -then positives together)you would achieve 1ohm. What I understand here is you wired this sub in series(+-+-+-). Wiring in this method causes the ohm load to increase, thus the amp is reading 4 ohms. What really sux about that sub, is that it is 2 ohm DVC. You CANNOT run that sub at 2 ohms, which 99% of all mono block amplifiers are 2 ohm stable. That amp is NOT TRULY 1 ohm stable. It is 1.3ohm stable. Long story short, if you want more BOOM, rewire that sub (--,++), and keep your gains low. You are actually tricking the amp to read LESS resistance. I don't know a lot about bandpass, but I am pretty sure that setup has to be TUNED or you will shred the box, smoke the amp, and murder the sub.
 

New member
Username: Wireaudio

Wood Dale, ILLINOIS USA

Post Number: 5
Registered: Apr-05
Here is an image that tells you how i wired it.
Is this right?
http://www.americansitedesign.com/wireaudio/sketch.gif
 

Silver Member
Username: Kojak28

Augusta, GA USA

Post Number: 127
Registered: Feb-05
I don't think so. According to that diagram, you are only using ONE voice coil. You need to wire BOTH voice coils together (- -, + +) then back to the amp on the same polarity, on the same channel if it is a 2 channel amp- Otherwise, you are going to drop yhe ohm load.
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