With the Mercury series, Hifonics proves that even a relatively inexpensive series can be convincing in practice. The IV/800 sounds marvellous for the money and the monos do exactly what they are supposed to do. If you want more power and premium, you can choose Zeus power amplifiers. For most people, Mercury will certainly suffice.
This test report belongs to a different type: Mercury 1/1500 (Evo) | 1-channel amplifier
