Seem like localized brand and manufacture in china; If i am not mistaken.

May i ask which model beyer yu a having? What yu mean entire set? Head unit with 6"x9" speaker?(cause to me it is the most economy way for car stereo sound system) Ask you self how decent yu want your car sound to be as compare to your beyer.

All Japanese brand sound balanced,the differences are some brand sounded more detail in music instrument,some detail in emotion,some brand detail in vocal,like sony detail in bass. i mean detail more resolutions in that particalar portion(octave-in music term);so yr ear can tell yu when that portion show up. (Maybe one of these day we could plan a system sound close to yr beyer sound?)

If you happen to have that grados,that could be done. around 5 k .

70% people would go by step by step that's normal.go for head unit(japan). second step might be slightly more money to spend.(up front 2 way component set and a amplifier plus custom front door panel,than only increase up front bass by front door sound proof.Hope all well and end well,bye!

Aless sounded less fun but slightly more accurate if compare with grado.but i like it

music are a little bit difficult for somepeople to tune,some people take 5 to 10 yrs to learn,some take double the time.If yu are a piano player that will be slightly easy for yu. Ask those guy work more 10 yrs in accessories .they
still take new challenge on every installation. every car have their acoustic weakness .I would say it is not 1 plus
1 equal to 2. Get someone who know to tune for u.(pay him couple hundred bug)

Maybe human ears could tell the minor fineness or harsh on high frequency driver ,their pointing at majority not minority market,cause ice market a really small in our country..And they have their international higher end product ,like dls,flux..etc.