Hey Guys (and gals)
I am new to 12volt and have seen quite a few posts on this subject. I worked at a shop that sold Memphis, JBL, Orion, Focal, Swiss Audio (yuck), Clarion, JVC, Kenwood Excellon, Pioneer, and Audiobahn. After installing everything Memphis had to offer, from the Power Reference (entry) line to the MOJO and Mcsq (top of the line), my personal conclusion was that Memphis does in fact offer a very solid line of products. They have a very good warranty, were fairly reliable, and sounded decent. However, I do not believe, by any stretch of the imagination, that Memphis offers the best products in the industry. For starters, 90% of their products say right on the box "custom manufactured in Korea". I know that a lot of products are made over seas, but that particular quote is also found on all the off the wall swap meet brands as well. Maybe it's just me, but that kinda bugged me. The other 10% of their products, like the MOJO, LVS, and M3 subs along with SOME of their amps, are in fact made in the U.S.A. The strange thing is that the MOJO sub looks just like subs that are offered by Powerbase and a few other manufacturers, wich leads me to believe that Memphis buys most it's drivers and slaps their logo on them. That's fine I guess, a lot of manufactorers do that, but I would prefer a brand that does it's own R&D in house and builds it's own drivers rather than buy them. To make what could be a very long story short, here is basically everything I know about Memphis, good, and bad, in a nutshell. . . .
*Memphis does not build it's own drivers
*Memphis does offer a great warranty
*Memphis offers a solid product at a very good price
*Memphis' power ratings (for the subs) are pretty much right on the money. In short, don't drive them too far past their Rms power rating
*Their M-CLASS and MOJO amps are very good amplifiers, despite being "custom manufactored in Korea". They sound decent overall, but in comparison to some other higher end brands (such as JL), the signal-to-noise ratios are a little high, meaning they put out more distortion than most. Now, their Power Reference (entry) line amps SUCK! Don't waste your money on those things.
*The entry level subs (Power Reference and Mclass) and a good sub for a beginner and are priced right (roughly $100.00 and $110.00 respectively, for 10'') I had both a Power Reference 10 and 12 and they did very good running off my JBL 300.1 class d amp. The MOJO 12'' sub, in a 4 cubic foot slot ported box running off 1200 watts would regularly hit about 154 db brand new. That's loud. They get louder as they break in. We could squeeze almost 156db out of them after break-in (that's 1 sub!) BUT (there is always a BUT) they don't SQ worth a darn. They are just loud. If you want JUST LOUD, it's a perfect sub for you. We sold a 12'' MOJO for around $500.00, so for what it is, again, it's priced right. As far as quality goes, I am a little disapointed in the MOJO. It's supposed to be their flagship sub, but used very cheap components. Memphis still uses a foam surround on the MOJO (they use a nitrile or butyl rubber on the entry level Mclass) , a pressed paper pulp cone, and like a 2 1/2'' voice coil (if I remember correctly). The MOJO has a 225 oz. magnet and a cast chassis. and is made in the USA.
So, after doing some research and listening (to JL products), I feel that JL offers a superior product line to Memphis, but you are also in a totally different price class. JL is very expensive but offers what I think is and outstanding product, even when compared to all the other brands out there, not just Memphis. (by the way, if anybody has any MATURE, LOGICAL feedback on JL, please post something in the forum for me. I am getting ready to design and build a system and am considering all JL.)
*Memphis again is great for the first timer or the competitor that doesn't want to spend a grip of cash on stuff. Memphis is in short a middle of the road brand.
Hope this was helpful