If I use a speaker level converter and I want to bridge the amp, how can I get input from both channels? Do I just tie the RCA's together, or will that cause some sort of issue?

 

What type of amp is it? Some amps will bridge the channels internally and some have a bridge switch on them. Are you using it to just power a sub or subs?

 

Its an old Sony XM-250. Two channels 50 watts each. Bridged it is supposed to be 110 or so. To bridge the amp, it designates which RCA to use and then you do the + of one speaker out and the - of the other.

 

Easiest way would be just use a Y adapter. Run both rcas into the Y and then a single rca to whichever amp input it says to use.

 

Is it safe to bridge 2 subs down on a mono?

 

It doesn't matter how many speakers are connected to an amp as long as the ohm load is correct for the amp.

 

What he said

Just remember that however many drivers you have, divide that number in to the power output (rms watts), and each driver gets that much.

 

as for bridging and the rca's, you connect the rca's as normal, there nothing special to do with them unless you was to run 2 amps mono and using just one pair of rca's

but for bridging the speakers to the amp. yes true the more the merrier, but dont forget ohm loads and also that to many speakers to one amp, it wont work as loud because the amp is using the same 110 watts to power many speakers.