Re: How many watts is my sub getting
I received this answer in another forum and I think this person might be right: ( Can I get some opinions!! )
I have heard several people voice the same complaint you have.
The class of amplifier you are using is likely the culprit.
I'm going to explain what I think is happening in fairly simple terms.
Please forgive me if I get my theories wrong. I'm by no means an expert at this.
Class H amplifiers are very lightweight. That is good. The drawback to them is that they pull their power directly from the "mains". As a result, the line voltage from the plug in the wall can sag under heavy demand. If you demand lots of power from the amp, the amp pulls that power directly from the wall. That's just the way the power supply is designed.
It's a tradeoff.
Class AB amplifiers weigh more. Their power supplies are more robust, and tend to "store" power in the power supply capacitors. These are usually big, and add to the weight of the amplifier. Under heavy demand, the AB amplifier releases some of the power it stored up. This can help support the voltage on the line, and prevent the voltage sag that would be experienced with other classes of amplifier.
If your power supply (voltage from the wall) is already questionable, then any amplifier will protect itself. When the voltage from the wall dips too far, the amplifier will suspend operation. This happens with just about any class of amplifier, but AB amps tend to have less problems with that aspect, since they store some power for future use.
To say that a QSC amplifier will not be affected the way your electrovoice amplifier was, is simply not true. It's like saying that only Chryslers can climb steep hills. There will be some QSC amplifiers that will not be as badly affected as you EV amp was... There will be EV amps that will not be as badly affected as yours was, too.
The power supply to the amplifier must be adequate to support the load, regardless of the manufacturer.
I think you could run your amp in bridged mono all night long, as long as you weren't demanding all the power it had to give.
If you also had a lighting system on the same circuit, perhaps another amp... As the loads increase, the voltage drops.
Definitely setting the proper gain structure is important. I'm just suggesting that adequate power supply for your rig is also important.
I'm not sure how dependable the power grid is in Venezuela. I don't mean to disrespect your home. I'm just thinking that if you do have voltage delivery issues, perhaps the amplifier you have chosen is not the best choice for the application. If you decided to change the type of amplifier you use, you might benefit on the performance side, but you would suffer on the weight side.
It's just a theory, but I thought I'd throw it out there, in case it had some merit.
Cheers
