but they will not sound worse at 4 ohm or even 8 ohm for that matter. So it would make more sense to buy the amp that is OPTIMIZED to your current situation. 2 channel amps are OPTIMIZED to run at 4 ohms where as D class amps are generally OPTIMIZED to run at 2 ohms. If your plans are to continue running a single 4 ohm sub and you decide to upgrade your amp I would suggest using a 2 channel amp. I completly disagree with this statement. Note that this is a very simplifed example 2ohm is just less resistance and allows more power to flow. The mild current represents 2ohm resistance and the strong curent represents 4ohm resistance. Imagine swimming up a river with a mild current and strong current against you. Technically the amp gives off the same amount of power but because the resistance is lower more power can auctaully be used by the sub. Bridge either channels and 2 or 3 and 4 and use the other 2 spare chanels to run speakers in 3ch mode. Most D classes are optimised for 2ohm loads but they still have sufficent RMS at 4ohm especally compared to a A/B class 2 channel, but i wuld suggest staying with the 4 channel that uve got. It is more efficent and will usally consume less current then a bridged 2 channel. While it is important to have an amp optimised for your sub a D class is always better. That is correct parad0x but the amp isnt stable enough to be run bridged at 2ohm, it wuld more then likely sh!t itself. The lower independance the more chance of distortion then at a higher independance. So the amp adjusts to the ohms of the subwoofer, and when an Amplifier has the following rating įor the first one, it would mean that the amp would have detected a 4 ohm load on that 1 channel (bridged or not) and will give off 200 watts rms.Īs for the second line, it means the amplifier has detected a 2 Ohm Load on that channel (bridged or not) and is able to give off 400 watts rms.Īs menace2sobriety outlined u cannt run a single svc sub and any other resistance then what they come as, u need either mulpitple subs or dual voice coils. What they are telling you is correct for wiring though, except you are going to bridge channels 1 and 2 together not channels 1 and 4. and carefull with setting the gain on that amp. you are more likely to get about 170 watts rms. Use it for now and save up for a nice class "D" amp if that amp is rated lets say 300 watts rms mono. Then somebody replys and tells them to run their sub at 1 x 400RMS 2 ohms for most power.Īm I just miss interpreting something or what? I hear people asking for the most power setup for a one 4 ohm sub with their amp. Your saying, no 4 ohm subwoofer can be driven at 2 ohms, and no 2 ohm subwoofer can be driven at 1 ohm? That's a pretty big misconception I hear everybody making then. Man I dont have a 2nd subwoofer though!Īnd just for a final clarification. Basically yes the subwoffer would only be receiveing half of the amplifiers potential power the rest of that power would go to the other channels which could be used to power a sub or 2 speakers. By the looks that amp is only 4ohm stable in bridged mode (for sub operation) and 2ohm stable for stereo operation (speakers). If you have an amp running a 4ohm sub you will be looking at the amps RMS 4ohm if the sub is 2ohm then you look at the RMS 2ohm. What should I set the manual MODE to? (2CH / 3CH / 4CH) I take it switch it to 2CH?Īn amp isnt set at an ohm rating rather it has a tolerance range. Would I only be using Half of the potential power of this amplifier? Since I would only have CH1 and CH2 bridged into one? And if this is the case of what I have to do. I mean, if I do what you are telling me to do, which is use only 2 of the 4 channels, and bridge those two channels. One being, why would I get Total Distortion from bridging all the channels? what would be the cause of that? Is it not possible to bridge Channel 1, to channel 4 on this amplifier? I keep reading somewhere that lowering ohms on some amps will give out more power? In some cases I heard some people suggesting running an amp set at 2 ohms for a single subwoofer rated for 4 ohms? Hey thanks for the response! But few questions if I may ask. i think thats what the diragram is showing. looks like at the right hand of the terminals it shows you how to do that. either use the front or rear channels of the amp. unless you like total distortion? only use two channels and it looks like the sub is rated a 4ohms so no impedance problems. No you cannot use all four channels to power that sub.
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