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Old 11-16-2007, 09:57 AM   #1
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Is it possible/safe to run 4 ohm speakers/subs at 2 ohms without damaging them?
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Old 11-16-2007, 10:08 AM   #2
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A 4 OHM speaker will run at 4 OHMs unless it is run either in parallel or series with another speaker.

If your amp says 2 OHM stable, and your speaker says 4 OHM, you are fine.

If your amp says 4 OHM, and your speaker says 2 OHM, don't run it... you will burn the amp up.


EDIT>>>>>


What amp and what speakers are you going to run?
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Old 11-16-2007, 10:16 AM   #3
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The speakers are MTX 8000 10'*

T8104 10" Subwoofer 4 Ohm 24Hz-200Hz 400/1000 83.4dB

The amp I had was a Thunder 6500D (which a family member killed), being replaced by sandrock'* kicker 600.1.

The interior speakers are MTX Thunderdome Axials which are 4 ohm also, and will be getting the 200.4.

FRONT
Model TDX5202
Description 5-1/4" Coaxial
Cone Polypropylene
Tweeter 20mm Soft Dome
Pivoting Tweeter Yes
Impedance 4 Ω
Frequency Response 55Hz-20kHz
Power (RMS) 45
Peak Music Power 90
Sensitivity @ 2.83V 92dB

REAR
Model TDX6902
Description 6" x 9" Coaxial
Cone Polypropylene
Tweeter 25mm Soft Dome
Pivoting Tweeter Yes
Impedance 4 Ω
Frequency Response 42Hz-20kHz
Power (RMS) 100
Peak Music Power 200
Sensitivity @ 2.83V 92dB



That is unless I need to go bigger.
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Old 11-16-2007, 10:19 AM   #4
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Are the subs DVC?

also, do you know what OHM rating the amp has?
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Old 11-16-2007, 10:27 AM   #5
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Subs are SVC

Amp info ...
600.1
Low Impedance operation: 2 ohm stable
Mosfet power supply
Full time variable crossover: 12dB
Subsonic filter
Rms Power: 300 watts @4ohms
RMS power: 600 watts @ 2 ohms
Signal To Noise ratio: 95 Db
Frequency response : 20-200hz
Bass boost @ 18db
Has a built in Cooling fan
P.A.*.T.( Pre Amp Signal Transfer) Output RCA jacks to pass the incoming signal to another amp
Gold plated connectors
High and Low level inputs
Comes with a Bass ****
Soft start circuit
Protection circuit

200.4
# 4-Channel ZX-Series Amplifier
# RMS Power Ratings:

* 35W x 4 @ 4 ohms
* 50W x 4 @ 2 ohms
* 100W x 2 @ 4 ohms Bridged

Low Impedance Operation
SORT Protection Circuitry (Short circuit, Over-voltage, Reverse polarity, Thermal)
MOSFET Power Supply
KickBass: 0-12dB @ 40Hz
Built-In Electronic Crossover: 12 dB High or Low-Pass operation (80Hz)
High & Low level inputs
Custom tooled gold plated connectors
SAMS (Stereo And Mono Simultaneously) bridged mono load and a stereo load at the same time
Cast Aluminum Endcaps
Input gain control: Low Level (125mV - 5V), High Level (250mV - 10V)
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Old 11-16-2007, 01:19 PM   #6
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FYI - You always want to go with what your speakers RMS rating is.

Your 200.4 seems to be okay as far as powering the fronts and rears. Keep in mind that some/most amps power output are a bit higher than what they rate them at.

Lastly, if you have two single voice coil subs rated at 4 ohms, you will want to wire them like the diagram below to obtain a 2 ohm load which your amp can handle. you just want to make sure that your subs can each handle 300 Watts RMS so that you dont blow them up.



Do you know how to properly set your amps gains? Thats another thing to be careful of. You never want to clip the signal
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Old 11-16-2007, 01:29 PM   #7
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Ah, managed to find what I was looking for.

parallel


series
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Old 11-16-2007, 01:37 PM   #8
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By the time I got back to finish my post, someone beat me to it.

The subs have 400w RMS so I'll be ok there. From what I could find the kicker 600.1 seems to be underrated and average around 730w. So I figure I'll be pushing about 365w per channel at 2 ohms.

Nice amount of bass, but nothing to loud.
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