Good Informative Video on 5 channel Amplifiers. I prefer 5 channel amps instead of 4+1 as it avoids additional space, an equipment, avoids extra Power, Ground & Remote wires and noise. There are also couple of other ones at reasonable price range - if you can let us know. 1. Pioneer GM-D9705 - 4 Ohm RMS - 75W x 4 + 350W x 1 2. Aura Venom D5.80 - 4 Ohm RMS - 80W x 4 + 190Wx1 (320Wx1 @ 2 Ohm, 500Wx1 @ 1 Ohm) 3. DB Machete Fight MFA-5.1000 - 4 Ohm RMS - 4x 80 + 300 W (500W @ 2 Ohm) 4. ESX Signum SXE1000.5 (Hybrid) - 4 Ohm - 75 x 4 + 1 x 200/350/500 Watt RMS @ 4/2/1 Ohm 5. Ground Zero GZHA MINI FIVE - 4 Ohm RMS - 4x 75 + 190 W (320W @2Ohm)