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.
Typically, if you lift 60%-80% of max, you could do anywhere from 10-20 reps. Lifting at 80% and above takes you down to the lower rep range, which is where you'll be if you're trying to gain size. That means keeping your reps somewhere between 8-16, if you're lifting for weight loss and fitness. Your weights are determined by the number of reps you're doing.