Shopping for new speakers to pair with your amp? Choose speakers with RMS ratings equal to or higher than each amp channel's top RMS output. If you're getting multiple pairs of speakers with varying RMS wattage and only one amplifier, just match the amp's output to the lower of the RMS ratings.

The CT series is the most cost-effective toroidal transformer power amplifier of SAE Audio products. CT series is the best choice for the economic application of sound reiforcement.

Turn on the car stereo and set the volume to about halfway. Touch the positive lead of the meter to the positive terminal on the amplifier, and touch the negative lead of the meter to the ground. If you get a reading close to 12 volts, then your amplifier is working properly.

Your car amp should be able to provide 50-120% the amount of power as the speaker's continuous or RMS power rating. This will allow the amp to handle any spikes and reliably deal with the car speaker's peak power. Underpowering your speakers can not cause a great deal of distortion to the sound.