i have owned a lower line of mtx subs, and it didnt sound very good at all.
the output was really low, and when i turned it up the voice coil fried.
i've also heard four mid-range mtx subs (four 10 inch subs) and they didnt sound very good either.
there was lots of punch, but the output was generally 'struggling tight' and exaggerated.
i think they sounded like they were mumbling with fear, barely playing any details, and basically lots of bump with quiet (if any) actual detail.
all of the extra thump mixed in with the itsy bitsy details made me conclude the average response is muddy.
with that said, i can relate to the probability of the speaker being unpleasant.
hopefully you will take my story as advice, so you dont blow the speakers.
i have only listened to the alpine type R's a few times.
once or twice in the store, and once in a car.
as each year changes, its possible that the type R's change in quality.
i dont know what model you are looking at, but i dont know their speakers much anyways.
to be fully honest, i dont think the speakers sounded like they were worth much more than $45 per speaker.
but that isnt necessarily fair, because the amplifier they were connected to might have been junk.
i know when i heard the type R in a car, it was distorting.
i want to suggest some peerless subwoofers from parts express or madisound.
i havent heard those speakers ever.
the brand name is known for being audiophile (and known to be an improvement, at least, by other people)
places like best buy, they dont sell sound quality type speakers.
they are designed for spl with a pinch of sound quality.
some people are lucky enough to purchase a subwoofer that does 'mush' the details.
and 'mush' details is better than a subwoofer with no details at all.
but i wouldnt want to gamble my money.
i apologize that i cant give you a list of quality options of exact products.
but i do have one word of advice, dont listen to the manufacturers description.
they will tell you the speaker has details when the product doesnt.
its better to read people talking about the speakers, and if they have a list of unknown name brands.. they probably know what they are talking about (at least a major improvement)
you can also try browsing youtube and listen to subwoofers in the video.
the videos that dont have a distorting microphone can maybe help you find a speaker providing an example of its ability to play the details.
that means no 'late night tip' or 'bass i love you' or many of the techno/dance songs.
you need something that is fast moving and lots of changes clearly audible.
that is step one for hunting and listening.
the problem is, if you havent heard the extra detail and clarity.. then you dont know what you are listening for.
actually.. i can recommend you a speaker !!!
i had an MB quart rwe 302 that sounded better than any subwoofer i have ever owned.
i made the stupid mistake of asking for more output from one speaker instead of buying a second one and a new amp.
i had the dual 2 ohm version hooked up to a 600.1 kicker amplifier.
first i wired the two coils up in series = 4 ohms (300 watts)
the speaker wasnt loud enough for me, i just had two twelves and they were louder.
i tried to wire the two coils up in parrallel = 1 ohm (more than 600 watts)
the sub only got a little bit louder.. but i left it like that because the sub is 500 watts and i wanted to feed it more watts closer to its RMS rating.
well it lasted about 1 week and finally died when i was abusing it with a bass cd.
i have a 12w7 subwoofer that i have had for maybe 4 years?
with no money to purchase an amplifier, it has simply sat around waiting on me.
and if i ever sell that subwoofer.. i will probably be purchasing two more of the mb quart rwe 302 subs.
i had the sub in a bandpass box and there was details pouring out from behind the back seat.
the subs are $69.99 at woofersEtc.com with a suggested retail value of $299.99
and i swear, they are worth closer to the suggested retail price.
but, audiophile speakers have been being sold very extremely cheap for about a decade now.
hell.. i bought some midranges that go into a speaker set that costs $1,200
and i only paid about $30 for a pair of 'em shipped to the house.
part-express sells some midranges with the same name brand for about $60 each.
'peerless' HDS drivers is what i am talking about.
the ones i bought were 'peerless' nomex drivers.
if those mtx subs are really that bad.. get the MB quart rwe drivers.
i guarantee the improvement is enough to make you want to give me a $10 bill.
dont make the same mistake i did.. you can run two of them with 600 watts and it will be more than adequate.
the one i got was a display item that never received any power.
the amp was a kicker 600.1 (kx version i believe)
300 watts is enough for me today.. but at the time i wanted more pounding that only comes with two twelves (at the excursion i was working with)
i had two infinity reference 12's (the white cone with black dust cap version)
they were OBLITERATED by the soundquality that came from the mb quart sub.
and i assume my infinity subs sounded better than some bad mtx subwoofers.
i have seriously thought about selling my 12w7 so i have enough money to purchase two of those mb quarts and an amp.
i really want to hear what the 12w7 can do.
i've only heard it once in a car (it was before i got mine) and it was running on about 175 watts (the amp was 300 or 500 .. i dont remember , but the radio was turned down)
far far far away from the 750-900 RMS needed to make it sing.
two of those mb quarts.. wire each sub's dual voice coil in series = 4 ohms each
then wire the subs in parrallel = 2 ohms / 600 watts from your amp.
i remember those subs would play rock/rap/techno
some speakers are only good at one type of music, like the four 10's i mentioned above.
they were pretty cute for rock music, and decent for techno music.
but those songs had thump, which is what the subs where good at.
aggressive bass guitar from death metal music isnt the same as a bass guitar from a band like no doubt (reggae?)
i think the mb quart subs are an upgrade big enough to make most people think about upgrading their speakers in the doors.