Woofers are now refoamed and installed properly in the speakers. Tested them today and the lack of bass is still prominent. Looks like the drivers did not affect the result.  I have to set bass-settings to max to aquire a somewhat balanced output from the 3 drivers. From what i have read on this forum, these speakers should have more than enough bass. I have been testing them with a couple of old amps/receivers (Nad 3100PE and a Beomaster 4400), but the change of amp did not affect the results.

Anyone got any suggestions on what the problem could be? 

Thanks in advance!

I have no experince on these speakers nor have I studied the schematics of the crossover but this resistor in one of your photos looks a bit strange (like it had some sort of foam on it); perhaps worth checking further?

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Does anyone know if this looks like a broken resistor? Both speakers are playing bass in the accurate same way. Those with similar speakers out there, are yours a bit lean in the bass-tones? 

That stuff on the resistor looks more like foamed & dried protective lacquer to me, and that would've been there from the factory.

I don't know what your personal perception of "lean bass" means or if I would hear it the same, but the newly refoamed drivers will need some playing before they will sound right. Give them a little use and see how they develop.

Also, have you tried themwith a different Beomaster?  Maybe the fault is not in the speakers.🤔
Mine don't lack bass. I have them connected to a Beomaster 7000.

Ok, I've been listening to a wide range of speakers over the past years, and my personal perception says that they should have som more bass, especially for their size. I can mention that with "loudness"-effects turned on, the bass is performing more like "it should", but ofcourse, this is my own opinion.  I will give them some time to see if the sound will change a bit. 

I will check around to see if someone got any other beomasters to test with, I do only have some old Nad / Tandberg amps, but I don't think the amp is the "problem" here.

Thanks for all comments!

Oyvind

Hej Oyvind!

Kolla att kablarna från delningsfiltret till basarna att de är hela.

Testa om det blir någon skillnad om du byter ut kablaget.

Om det finns sprickor i höljet så kanske de kortsluter mot kondensatorerna på kortet.

M

I read through this post somewhat quickly, so if it was mentioned already, I'm sorry, but I didn't see anyone suggest that your woofers are wired out of phase. If your voice coils aren't seized by an off-center magnet, and they move freely, that'd be the very next thing I'd check, before the crossovers for sure. Go through and make sure all your drivers are wired in correct polarity while you're at it. Those OEM woofers are very high quality; I'd keep them and re-foam them over replacing them with the (also very nice, but not the same) Peerless 8" SLS woofers.

Hope that helps,

Jon

Just a thought - Have you cleaned up the protection circuit? My MS150s sounded appalling after a lay up and it was all due to the protection circuit.

Again, thanks for all the feedback! I will check out these points and see if that could help to improve the performance!