I have never listened to S75s, nor have I listened to a BM4400.

However, I have two pairs of M70s, a pair of S45-2s, a pair of S40s, a BM4000, a BM2400, and a BM1900.  I primarily listen to classic rock LPs with the BM4000, and prefer my refurbished pair of M70s to the S45-2s and S40s.

I listen in a fairly large room, though.  In a smaller room I like the S40s on a wall the best.

I have found, though, the S45-2s sound very much the same regardless of source material, amplifier, and placement.  And they are great.  They are also much smaller than the M70; small enough that I use them as the desktop speakers in my system centered around my computer.

thanks for answer , just pick up my new BM4400 in absolutely gorgeus condition ... just cant belive this thing have around 30 years :o and the sound its just wow , id also get a 2 sets of BM6000 and 2 times Beocords one is BC6000 and the other one BC8004 HX-PRO all in immaculate conndition 

Going back to the speakers , I think ill stick with the M70 however they which im looking at doesnt come with any stands =/ , i might also w8 a bit longer and get a pair of MS150.2 ... hard dessision, so only headphones for now :)

hi again 

didnt want to start new post , just want to ask as i get 1 sapre BM6000 unfortunately appear to be faulty , well its turning on for a v1-2 sec then going off with little tick like sound, however it stays on when i put it straight away into clock mode

any ideas what could be wrong with it ?

Regards

Mike

no ideas .... but you would be better off posting this as a new thread with a better heading ... otherwise it is just going to get lost 

Or at least ammend the heading - like I just tried to do for you (hope it works)

ok thanks :) will post a new thread