Hifonics ZD-3350.1D Zeus Delta Amplifier vs Hifonics Zeus Delta ZD-1750.5D

Buy the ZD-3350.1D if your system is built around subwoofers and you want one big mono block to drive them. Buy the ZD-1750.5D if you are powering a whole system: front and rear speakers plus a sub from one chassis. The mono block is the more specialized tool, with a 2 AWG input, a 15-40 Hz subsonic filter and a wired bass remote; the five-channel is the more flexible one, with five channels, bridging and DC signal sense turn-on. Owners of both Zeus Delta lines report solid output for the money, but the five-channel runs hotter and needs more room, at 18.31 inches long and 7.76 lbs.

• Choose the ZD-3350.1D if you run one or more subwoofers and want a dedicated mono block with a subsonic filter and dash bass control.
• Choose the ZD-1750.5D if you need to power front speakers, rear speakers and a subwoofer from a single amplifier.