Originally Posted by johnplayerson
These amplifiers are a mistake in the Low price point, especially for sub duty. Probably ok if your just driving tops. Frequency response specification is 15hz according to marathon. Not only is this bad but seeing as the amplifier weighs in at 58 ibs and they advertise it as a 77 pound beast, and refuse to correct that specification, I would not trust this unit. I bought two of them do not even perform well under 30hz never mind going down further.
At the low price point you are better off buying the cerwin vega cv 5000. They perform solid straight through the spectrum, and weigh in as advertised at 90 lbs LOL.
I subscribed to this thread when I posted in it back in 4/2011. I would have ignored your post, but it started to bother me so I had to respond and ask some questions. I am no fan boy for Marathon, and I know there are better amps out there like Crest for more $. I went with the MA-5050’s based on notnyt’s comments/ recommendations. He sold his because they were not powerful enough to push his LMS 18’s, not because they didn’t perform well under 30hz. I have (3) MA-5050’s and use 2 of them bridged to push 2 DTS-10’s, and use the other to push 2 PC-13 Ultra’s in parallel mode. I am not bragging, but I have had complete success in easily hitting over 130 dbl’s at the LP and Marathons are not even breaking a sweat. I have numerous REW frequency sweeps that prove I have substantial output below 10hz.
I know the MA-5050 specs show a frequency response of 15-25Khz @ +0/-1 db, but that does not mean it rolls off sharply at 15hz. It just means below 15hz there is more of a variation like say -3 db down to 5hz.
Now I did not weigh my amps before mounting them in my rack, but I know they are heavy. I cannot comment about Marathon’s 77 pound claim (maybe that is ship weight). How did you weigh each amp? I assume you used the same scale and methods when they were weighed…
I have not owned a CV-5000, but I Googled some pics and the specs, and it looks very similar inside and on paper compared to the MA-5050. It looks like it has the same size toroidal transformer, but I was wondering how it weighs 32 pounds more than the MA-5050.
When you tested the MA-5050 next to the CV-5000 using the same sub, same location, and EQ/AVR settings did you save your REW sweeps that prove that the MA-5050 performed worse than the CV-5000 under 30hz? If so, please post them so we can see the difference. If not, your comments/review is all subjective.
Again, I am no Marathon fan boy, and I am not trying to defend my purchase. I just find your post misleading and subjective. It could be possible that you received some bad units.