Report Abuse. First of all - RCA's, Pre-amps, Pre-outs, or just Outputs are all common terms referring to a head units low/line level rca style outputs used to drive an amplifiers input.The most basic HU's just offer a single pair (left and right) of pre-amp outputs.eport Abuse. First of all - RCA's, Pre-amps, Pre-outs, or just Outputs are all common terms referring to a head units low/line level rca style outputs used to drive an amplifiers input.
An ideal cardio session should be around 45 minutes. If you lift weights before aerobic training, youâll only need 15-20 minutes of cardio. Youâll get the same benefits as you would do in 45 minutes without weight training.
No Upper Limit. Always start weight training with weights that you can lift comfortably eight to 12 times, for a set. Build up until you can do two or three sets in each workout, then gradually increase the weight. Reduce the number of repetitions if necessary when you add weight. There is no absolute upper limit -- the goal is to tax your muscles, without strain.