Review on Seismic Audio - MBG-4000 - Power Amplifier - 2 x 500W at 8Ω - 2 x 1000W at 4Ω - Amp by Jonathan Sriubas

Big disappointment. Useful but overdone features. 2 x 200 watts at 8 ohms at best. The power switch has failed in the on position. The fan is loud. And while it didn't factor into the rankings, I agree with others that the DISHINGELL blue LED is bright. The claim of dropping to 20Hz is ridiculous. The rolloff starts at 45Hz, with -10dB at 35Hz and a dead end at 20Hz. I will use it but replace in the near future. ***Update 28 February 2017*** This unit has been replaced with a pair of Behringer iNuke 1000s, each in bridge mode. As reported above, the SA was still running - the fan was still noisy (and not from airflow, but rather from bearing or shaft play). The power button magically healed itself even though I stopped using it. I decided to unplug the power strip to save the failed power button. I haven't checked out the Behringers yet, but they smoke SA initially and sound a lot cleaner. Block SA will go to the shelf of decommissioned equipment. It worked well, but too expensive and weak. I no longer have SA amps. Gear he *used* to work with: Griffin Technology Powermate USB Multimedia Controller (also tested) Koss Pro-4AA Headphones (also tested) Sony MDR-v6 Headphones (also tested) Creative SoundBlaster Zx (also tested) Sony STR-HD550 (also tested) Sony STR-HD550 (also tested) via TosLink splitter with Specialty A/V 2x4 amplifier (also tested) Sony STR-HD130 (also tested) via 1/8" analog to RCA jack from 2. seismic source Audio BMG-4000 (also tested) tested and will be replaced soon) Quantity 6 VM Audio EX-WOD6 6.5" 3-way (also tested) Quantity 2 VM Audio EX-WOD8 8" 2-way (also quantity 2 Klipsch Pro Media 3" 2-Way Qty3 Behringer B1500HP 2200w 15" Subwoofer (also tested)Qty2 VM Audio VAS12SUB 12" Subwoofer (also tested)Sony SA-W2500 10" Subwoofer (also tested)