distortion goes up at 2 ohms
Originally posted by catapult
About bridging, you can do it but it's not usually that great an idea. Most pro amps can handle 4 ohms comfortably and 2 ohms in a pinch - the distortion goes up at 2 ohms. When you bridge them, it's 8 ohms comfortably, 4 ohms in a pinch, and 2 ohms are below their comfortable range. Many speakers dip near 2 ohms at some frequency so bridging isn't a good match for them. If your speakers are rated 8 ohms, and dip to 4 ohms at some point, you can probably run bridged. If they are rated 4 ohms, and dip to 2 ohms, bridging isn't a good option.
if it's hard to hear 1% THD,
does it matter if you went from 0.1% to 0.2% ....
Actually, if this bothers someone, don't run the amplifier at full power,
run it less to get lower distortion. /heh
You can exceed amplifier specifications under certain conditions. For example,
I can drive my Adcom bridged down to 1 ohm nominal driving tweeter arrays and it's
not rated for less than 8 ohms. The reason it works is;
a. there is no protection circuits to raise the 'red flag' and shut down the amp.
b. tweeters are easy loads, they draw much less power than ... lets say ..
c. music it not 100% duty cycle. If an amplifier were tested with a resistor
dummy load exceeding the 'ohms' specs playing continous tones, this
would push the amplifier to it's limit and it would complain.
The reason you want to bridge it is to raise the clipping ceiling if you like
to operate amplifiers at their performance envelope. At some point it's overkill.
With that said, I'd get (2) Crown XLS-602s, run them bridged so the RTi150s will get 1680 watts each LoL!
This would be fun to do and you don't need to buy another amp to try this.
Use your existing amp and bridge it, test the results on one channel only.