Long time Polk owner, but inside the house stuff (going back to Polk SDA-2B's -- anybody want to buy them as they are just sitting in the garage? -- now a Polk 7.1 solution made up of in-wall speakers and speakers in coffee tables). But I know nothing to little about car audio.
New car. 2009 Mini Cooper. Based on Mini forums recommendations, replaced front door speakers. Went with MM6501 components based on getting killer deal and listening to speakers at local Fry's store. Did self install with woofers in stock lower door speaker location and tweeters in stock upper door location (had to make an adaptor plate out of ABS).
Car has weird head unit that is not going to be replaced -- too much other car electronics and stuff displayed on radio display.
New speakers sound better than stock (junk paper speakers). Didn't worry about replacing 4 ohm with 2.7 ohm as the old stock door speakers (the two of them) were wired in parallel thus offering a 2 ohm load (right?).
Some music is killer, other just there. I'm thinking stock rear speakers are muddling up what I hear -- so rears should be replaced next.
I'm thinking of replacing rear stock speakers speakers with MM691's, but a little worried about the speakers being 2.7 ohm where stocks are 4 ohm. But per Polk site, factory head unit should be ok with 2.7 ohm speakers. Others in Mini forums have used DB691 speakers in rear with no problem.
So many questions ...
First background on me. In mid 50's, so not looking for booming bass. Not looking to blast my music. Not looking to win contests. Not planning to add a sub. Just want nice, clean, pleasant sound in my car.
Mini head unit is supposedly 15 watts RMS x 4 speakers at 4 ohms. Don't know voltage, don't know anything else.
Now the questions:
1) Will MM691's work with my factory unit, or will it "kill it over time" as the unit struggles to drive 2.7 ohm speakers?
2) What will an amp give me beyond more volume than the stock unit, i.e. must I install an amp? Does the music sound "better" with an amp? Would your answer still be better if the amp is getting speaker level input? (see next question).
3) If I install an amp, it's going to have to be one that uses speaker level inputs as tearing apart the dash is not something I am going to do or let anyone else do -- there is a connector right at the driver footwell which has all the four speakers brought to it so I can route the speaker input to an amp from this one location and then route the front speaker wire back from the amp to this one connector and have the stock wire then go to the front speakers and not deal with wires through the door "boot" (good plan or bad plan?). The rear speakers would be driven with new speaker wire direct to the speakers as the amp will go nearby in the back (the boot as Mini calls it).
Because of the nature of the killer deal, if I buy the MM691's (which I am close to just buying them and see what happens), my total investment to replace the stock paper speakers will be about $270.
Any help or advise will be appreciated.