I’ve been running a few audiosource amp100’s in bridged mode for my active setup to get more power out of each amp for each driver. My question is what above ground really means when you are connecting the drivers to a dsp and then the crossover is done there.
so there is no polarity because both are hot because the amp is bridged?
I can reverse the polarity in the minidsp and get the drivers to sum the same way as a positive and negative.
The drivers I’m using for the bridged amps are 8ohm so no problem being bridged with halving the ohm load to 4.
is it a bad idea to have the amp in bridged mode for single drivers and trying to do crossovers in a dsp?
i used to run my towers in bridged mode but those where passive crossover towers.
so there is no polarity because both are hot because the amp is bridged?
I can reverse the polarity in the minidsp and get the drivers to sum the same way as a positive and negative.
The drivers I’m using for the bridged amps are 8ohm so no problem being bridged with halving the ohm load to 4.
is it a bad idea to have the amp in bridged mode for single drivers and trying to do crossovers in a dsp?
i used to run my towers in bridged mode but those where passive crossover towers.
The outputs are differential, so they are relative to each other rather than to ground.
The instructions for bridging the amp should state which output (Lhot or Rhot)
is considered to be positive for a positive input signal. But for sure at least be consistent.
DSP and a bridged amp for a single driver is ok. But use a large series capacitor as protection for a mid/tweeter.
The instructions for bridging the amp should state which output (Lhot or Rhot)
is considered to be positive for a positive input signal. But for sure at least be consistent.
DSP and a bridged amp for a single driver is ok. But use a large series capacitor as protection for a mid/tweeter.
I think you have confused a number of things. Both inputs and outputs have polarity, it's not arbitrary but as long as the phase relationship is correct between the drivers it isn't a problem.. When in bridge mode neither output is ever at ground potential and there must be no common connections between any amplifier output terminal or you are effectively shorting those amplifier outputs. The amplifier outputs are floating and are not referenced to ground.
Yes I know how they are setup I’m just confused what it is actually doing as far as crossovers for a dsp considering both are considered hot signals. But if I get a null crossing them over I can still reverse polarity in the dsp to get them to sum together.
So that’s the reason I can still flip Polarity on the dsp and it still works like there is a positive and negative. It still flips the way the power flows I’m guessing?
With a positive input, either the difference signal ( Lhot - Rhot ) will be positive, or else ( Rhot - Lhot ) will be positive.
The amp instructions should say which when bridged. I would keep the drivers wired with the proper polarities for clarity.
Some might say "above ground" when they actually mean positive.
The speakers are connected in bridge mode for a while now in the correct order I was just curious as to integration with other drivers in a dsp. Since they are no longer positive and negative polarity crossing them over in a dsp to other drivers would change that? But it still seems like if I reverse polarity on the driver in the dsp the polarity does get flipped on the driver. Testing in rew to get things crossed well with each other. The other drivers are in other amps but those amps are not bridged.
Yes, the polarity can be reversed if needed. The bridged amp and driver combination can be acoustically
either inverting or non-inverting, depending on which way the driver is connected, same as a regular amp.
The DSP won't know that the amp is bridged, just whether the measured acoustical output is inverted or not.
either inverting or non-inverting, depending on which way the driver is connected, same as a regular amp.
The DSP won't know that the amp is bridged, just whether the measured acoustical output is inverted or not.
Much ado about nothing. I don't see any relevance to the amp being bridged or not in regards to using a DSP. Polarity is polarity. The speaker is either in phase or it isn't. If it isn't, then switch the speaker leads or invert it in the DSP.
The amplifiers don't care what the polarity of the input signal is as long it is within the allowable AC input voltage range. The outputs likewise don't care about the instantaneous output polarity as long as it is inside of the linear range of output swing. The outputs can swing positive or negative relative to ground and each other. (Since it is AC the power "flows" in both directions during operation, inverting the input polarities simply inverts the output polarities) This isn't DC, the polarity at any moment in time can be positive or negative relative to the midway point which is often referred to as the 0 volt baseline. AC wave forms always swing above (+) and below (-) that baseline.
I think some were concerned since bridge is a floating load.
But you seem to understand that.
If you get a null in crossover.
Do what you have already done.
Invert with dsp, or invert driver connections.
Either will accomplish same outcome.
But you seem to understand that.
If you get a null in crossover.
Do what you have already done.
Invert with dsp, or invert driver connections.
Either will accomplish same outcome.