4 DVC 4 ohm subs to one D class amp

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=18793
Printed Date: July 07, 2025 at 6:29 AM

Topic: 4 DVC 4 ohm subs to one D class amp

Posted By: Buzzkill
Subject: 4 DVC 4 ohm subs to one D class amp
Date Posted: September 11, 2003 at 12:05 PM

I have learned so much from all of the helpful people on this site and first off before my question i have, I want to thank everybody for taking time out of thier days to help other people that are trying to learn or just fixing a problem.I have 3 questions (sorry so many):
1. I have an MTX thunder81000d D class amp and 4 Thunder6000 DVC 4 ohm T61244A 12" subs and i need to hook them up to be 2 ohms.All specs for the amp and subwoofers are below:
THUNDER81000D
RMS Power measured at 12.5 Volts DC:
500 Watts x 1 into a 4 Ohm load with less than 2% Thd+N
1000 Watts x 1 into a 2 Ohm load with less than 2% Thd+N
Dynamic Power measured at 14.4 Volts DC
850 Watts x 1 into a 4 Ohm load
1500 Watts x 1 into a 2 Ohm load
Signal to Noise Ratio: ¡Ý100dB A-Weighted
Damping Factor: >100
Frequency Response: 20Hz-200Hz
Maximum Input: 8Vrms
Thunder EQ: Variable Bass Boost (0-18dB) centered at 40Hz
Crossover: Variable 40Hz to 200Hz, 24dB/octave low pass
Recommended Fuse = 150A

Thunder6000
T61244A 12" Subwoofer Dual 4 Ohms 33 Hz-150 Hz 500 250/500 87.4 dB 2" 37oz. 5.625"

Question 2: On the thunder amp it has speaker inputs on it like a 2 channel amp but all of the ratings are going by X1 channel,How will i wire that and make it come out at 2 ohms and will that evenly split the power giving each sub 250 watts?

Question 3: My sony deck has 3 rca outputs coming out of it, Front, back, subs.i am going to be using 3 amps total for fronts mids and subs, and i want to use a crossover but everyone one find has only 2 inputs.How do i use all my rca outs on the deck or which two do i use?
If anybody out there can help me with these problems i would be very thankful. Thank you for your time in reading my post

Replies:

Posted By: DYohn
Date Posted: September 11, 2003 at 12:12 PM

Here ya go:

Question 1 and 2: Do not connect the speaker-level inputs on the amp. Wire your subs like this for a 2 ohm load on your sub amp:

posted_image

Question 3: Use the sub pre-out on your deck directly to your sub amp and set the crossover using the controls in the head unit. Use the L/R front and back pre-outs to feed your crossovers for high/mids.

Posted By: Buzzkill
Date Posted: September 11, 2003 at 12:33 PM

Wow!! Thanks for the fast responce.Looks like im ready to go but one more thing,I am not going to use the speaker level inputs.The amp has 4 terminals + - + -.
Do i just use pos. on the positive on the end and neg. at the negative on the other end and will that still be 2 ohms? Thank you!

Posted By: DYohn
Date Posted: September 11, 2003 at 1:47 PM

Your amplifier does not have speaker-level inputs. It requires low-level RCA inputs.

The four speaker terminals you see are there for connection convenience. Your amp is mono and you only need to use ONE SET: One + and One -.

To get a 2-ohm load, connect your 4 speakers as shown on the graphic I copied from the JL Audio web site tutorial section to one set of your amp's speaker terminals.