From time to time, I see stereo amps that can be bridged to mono, and the mono power rating is higher than the sum of the stereo rating.
What allows this to happen? I can understand being able to double it, but how can it go above and beyond? Seems you would run out of heatsink, power supply, or power generating parts.
What allows this to happen? I can understand being able to double it, but how can it go above and beyond? Seems you would run out of heatsink, power supply, or power generating parts.
Because of the Ohm’s law.
Two bridged amplifiers provide double the output voltage. Double voltage provides four times the power. 🙂
Two bridged amplifiers provide double the output voltage. Double voltage provides four times the power. 🙂
Bridged operation is two amplifier channels in antiseries, so there is double the voltage,
but only the same current is available. The middle of the load is like a virtual ground.
The bridged speaker impedance will usually have to be a minimum of 8 ohms, because
the current capability does not increase. All thermal ratings for the parts and sink still apply,
but with an 8R load, the amplifier thinks the load on each channel is 4R instead of 8R.
but only the same current is available. The middle of the load is like a virtual ground.
The bridged speaker impedance will usually have to be a minimum of 8 ohms, because
the current capability does not increase. All thermal ratings for the parts and sink still apply,
but with an 8R load, the amplifier thinks the load on each channel is 4R instead of 8R.
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Thanks, that makes more sense.
While a pro amp, this is a great example (almost 2x the rated power when bridged at 8 ohms...and 4 ohm bridged gets squeezed): DSi 1000 | Crown Audio - Professional Power Amplifiers
While a pro amp, this is a great example (almost 2x the rated power when bridged at 8 ohms...and 4 ohm bridged gets squeezed): DSi 1000 | Crown Audio - Professional Power Amplifiers
2 ohm load (4 ohm bridged) is really an overload condition. The better pro amps will tolerate it, but generally you can’t run them that way day in day out at high levels (nearly continuous clipping) that way. They will overheat, not last as long, and most times draw more than 15 amps off the wall socket when run hard at 2 ohms.
This particular series looks like a fixed install version of the xTi series. Iiirc, the 1000 had kind of a woosy power supply and you needed to use the 4000 or 6000 to get any real bass. Then again for “cinema” applications, or even PA, the 1000 would be used for the TWEETERS.
This particular series looks like a fixed install version of the xTi series. Iiirc, the 1000 had kind of a woosy power supply and you needed to use the 4000 or 6000 to get any real bass. Then again for “cinema” applications, or even PA, the 1000 would be used for the TWEETERS.