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.

If you already have the speakers, review the speakers' RMS rating, then choose an amp with the highest RMS output per channel (no higher than each speaker's RMS rating). 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.

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.

Car main speakers: 50-60 Hz, the most critical element in main speaker crossovers is to block low-end bass (frequencies 80 Hz and below) 2-way speakers: 3-3.5 kHz (high pass) Midrange: 1-3.5 kHz. 3-way system: 300 Hz and 3.5 kHz.