Question about DHD NTX-2009 Car Audio Amplifier

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Operate amp @ 2 ohm

How do i allow my dhd ntx2009 to play @ 2 ohm? do i alter the wiring to the speakers or do i alter the wiring leading from the amp into the speakers? or am i totally incorrect in the above,SO WHAT DO I DO? WHO COULD HELP?

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  • Master
  • 6,966 Answers

Hi, To get 2 ohms you don't have to do anything with the amp. Simply use 2 ohms speakers for each of your output. From your other post, I gather that you have bridged it to 2 X 500 (from the default 4 X 250). If say your RMS Power at 4 Ohms is about 320 W x 4, just using 2 ohms speaker would give you roughly 600 W x 4 RMS, imagine what you get with X 2 (bridge) setting if your speaker are rated @ 2 ohms. Also from your other post, you are using "12 inch pioneer svc 800watt subs", how many ohms? So it will be the speakers determining the ohms. If your Pioneers are rated 4 ohms/800 watts, then you would need four, 2 wired in parallel as explained by Buffalo12980. Good luck. PS But of course, the amp will run hotter and auto protect may kick in more often.

Posted on Aug 23, 2007

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  • Master
  • 625 Answers

What is the output impedance of the unit - factory specs? use calculations for resistances in series or parallel to get what you want. for example if the amps output is 8 ohms and you have two 4 ohm speakers wire the speakers in series. if your output is 4 ohms and you have two 8 ohm speakers, wire them in parallel to get 4 ohms. another way is if you have one 8 ohm speaker and you want it across the 4 ohm output, find a wirewound resistor that'll take the wattage rated at 8 ohms and put it in parallel so the output sees a 4 ohm load.

Posted on Aug 23, 2007

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1 Answer

I have the xterminator 2000d amp and I am wanting to wire two 12s and one 15 to the one amp. Both Kicker speakers are 4 Ohm SVC. Am I able to do this safely?


Wire the two kickers in Parallel, this will half the resistance of 8 ohms to 4 ohms and match the 15" speaker on the other channel.

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I cannot find the right way to hook my TS-W304C Subwolfers up to a mono channel amp.


what amp? the speaker wiring depends on the ohmage rating of the amp. if the amp is 2 ohm stable, then you can hook 2 TS-W304C's up to it, both positive leads from the speakers attached to the amp positive, and both negative speaker leads connected to amp negative. this is called parallel wiring, and it reduces the ohmage (resistance) down to 2 ohms. your speakers are 4 ohms, and 2x4 ohm speakers in parallel makes it equal 2 ohms. if your amp is only 4 ohm stable, then you will only be able to hook up one of your speakers to it.

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Wanting to wire 2 dual 4ohm speakers to the amp do i use 1 channel or both?


Hi, the amp is stable down to 1 ohm per channel, so use both channels--one per speaker.

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Total Power Bridged in 2 or 4 Ohms ?


Nice amp the specs say the following:
4 Channel 100W x 4 (4 Ohm)
4 Channel 150W x 4 (2 Ohm)
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But.... it tends to go into protection quite fast so i wouldn't go too low with speaker impedance.

Dec 28, 2010 | DHD NTX-3106 Car Audio Amplifier

2 Answers

Ok . i have a pair of crossfire subwoofers, @


Your amplifier is 4 channel... and only 2 ohm stereo capable.

You will get the most power putting 1 subwoofer wired in parallel on each BRIDGED channel.

This will give you a 2 ohm stereo load.

Both + on 1 subwoofer to + terminal on amplifier bridged channel 1
Both - on 1 subwoofer to - terminal on amplifier bridged channel 1

Both + on 1 subwoofer to + terminal on amplifier bridged channel 2
Both - on 1 subwoofer to - terminal on amplifier bridged channel 2

Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.


Jun 10, 2009 | DHD NTX-3102 Car Audio Amplifier

1 Answer

Dhd ntx 2009


With two 4 ohm svc subs and a 4ch amp the best way to hook it up is as you have described. There is no way of wiring it to get a lower ohm with your set up.

Aug 28, 2007 | DHD NTX-2009 Car Audio Amplifier

1 Answer

How 2 get ntx2009 2 work at 2ohm


How do I use all the power of my ntx2009 to power one 12" subwoofer?

Aug 22, 2007 | DHD NTX-2009 Car Audio Amplifier

1 Answer

Amp has 3 modes on it ,as a switch,what is this,it has a 2,3,4 channel mode,i have the gold dhd 1000watt x4 channel


first thing 1000@4 means 250w per ch. which means150w usable power.the mode switch is only to reduce rca cables,use 2ch mode if only 1 pair rca available,60hz is a bit low for this amp,90 would work better.

Aug 21, 2007 | DHD NTX-2009 Car Audio Amplifier

1 Answer

Sub does not fully work


My guess is that one of your subs has a damaged voice coil, which acts like a short circuit to the speaker outputs. If you put an ohmmeter on the speaker terminals you should measure a resistance of not much less than 2 ohms (assuming you've wired the VC's in parallel). If you measure a significantly lower resistance then you have a damaged subwoofer.

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1 Answer

DHD ntx6408 subs


Voice coil has been blown open. Most likely alot of times what I do to test a speaker is connect it to a 9 volt battery. on and off and the speaker should bounce. If not speaker is blown. Plus this way you could save yourself lots of problems. If the speaker was shorted and not blown open. You would now possible have a blown amp and home stereo.

Jan 06, 2007 | DHD NTX-6612 Car Subwoofer

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