sub wiring, 2 d4’s and 1 d2 woofer
Printed From: the12volt.comForum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=113493
Printed Date: May 08, 2025 at 10:14 AM
Topic: sub wiring, 2 d4’s and 1 d2 woofer
Posted By: vandal337
Subject: sub wiring, 2 d4’s and 1 d2 woofer
Date Posted: April 29, 2009 at 3:57 PM
Replies:
Posted By: vandal337
Date Posted: April 29, 2009 at 3:59 PM
Posted By: djrankin004
Date Posted: April 29, 2009 at 6:04 PM
Posted By: stevdart
Date Posted: April 29, 2009 at 10:21 PM
Here's a recent post that's similar. See especially i am an idiot's reply at the end.
Here's a way you can achieve equal power distribution to all 3 subs:
The left and middle are the d4's. The one on the right is the d2. Both coils on the d2 are used, while only one coil on each of the 4's is used. The d2 is series-wired to make a 4 ohm impedance, and then the three 4 ohm impedances are paralleled to achieve an equally distributed 1.33 ohm load on the amp.
To see if single coils can be used in your situation, determine the power output of the amp (RMS) at 1.33 ohms (which will be less than at 1 ohm). Find the continuous power handling capability of each of the subs, then add the three of them together. Find 2/3 of that capability. If it is about equal to or more than the amp's true output then the situation will be safe.
Example: each sub is rated 500 watts continuous, both coils driven (1500 watts total). 2/3 of the sum total would be 1000 watts. If the amp puts out about 1000 RMS watts or less at 1.33 ohms it is a safe situation to use only one coil per sub.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: i am an idiot
Date Posted: April 30, 2009 at 4:14 AM
Posted By: vandal337
Date Posted: April 30, 2009 at 1:49 PM
Posted By: vandal337
Date Posted: April 30, 2009 at 1:53 PM