I had a technician do the hum fix to one of my 2 MFWs for a very reasonable price. It mostly fixed the hum, although, if I get very close, I can hear a small hum. My other one used to hum for a minute or so after I powered it up and then stop. On the advice of many on this thread and others, I stopped powering it down. Now it emits a low hum all the time, slightly louder than the other MFW.
Having had several of these amps go bad on me--once when I wasn't home--I'm feeling less and less comforable leaving both subs powered on all the time. I guess these are my options:
- Do the hum fix on the one I haven't and keep both subs powered on all the time.
- Replace my V2 amps with V3s.
- Get rid of one MFW and do the Turbo upgrade.
- Get rid of both and get one or two new ones.
I wouldn't want to get V3 amps if they have to be left on all the time. I'm not sure what I'd be losing, if anything, by going from dual MFWs to a single Turbo or other sub. I have a 16 X 16 hexagonal room with a cathedral ceiling about 20 feet high in the middle. The room has several openings to a surrounding hallway and other rooms. My receiver has Multeq XT, but not XT 32.
I've been mostly happy with the sound of the MFWs, but I used a graphing program last weekend and discovered that I have some issues with my room, which has some treatments. I moved both subs and got a slightly better graph. I applied some filters with an Onix R-DES unit (I know, I know--it was borrowed). It helped even more, but wouldn't you know it, the unit started making an annoying, almost constant, mini-thumping come from the subs, so I had to bypass it. What I'm getting at is that I don't really know if I need two subs or just one good one for my room.