Sounds to me that the Pentas need an service. You need to work out which bit. You can use them as passives by taking the amplifier off the bottom and there is simply a two wire connection to the cross over. Try using the BM7000 as the amplifier and see what you think. If it sounds the same or worse, try changing the components in the cross over. Obviously have a look at the drivers as well.

If it sounds much better using the 7000, the amplifier needs servicing. That is not so easy!

The service manuals should all be on site. 

If you are used to the brighter, more clinical sound of modern speakers then you are almost certainly not going to like pentas.

It's quite OK not to like the penta sound. Like me, you should withstand the torrent of "abuse" directed at you by the majority on this site and just stick with what you like!

😂

Pentas do have a warmer sound than the more modern speakers and are very much at their best when sitting down as the tweeters are then at ear level.

In this case the OP had heard Pentas before and liked them so it would suggest that this pair have a problem. However as we always say, speakers are a matter of personal taste  and everyone has their own idea of what they want. At present, my favourites are M100s as they have a better top end and bass than my Pentas.

Thank you for your input!

 Very good idea Peter! I know how the bm7000 sounds so I will connect it directly to the speakers. I also did some adjustments that improved the sound a little. I am embarrassed to say that I did not read the manual 😳. I was very eager to try the Pentas and it was in the middle of the night. I had been driving 1300 kilometers for the purchase so I was high on caffeine and energy drinks....

 
I discovered that the input level was not correct adjusted and both speakers were set as right channel! I must have had coffee in my ears not to have heard that it was in mono. I live in an  apartment so I could not play so loud in the middle of the night either.
 

I have tried them out more now and I am still not so pleased. They are not as detailed as I would like to remember them, and that "clinical sound" someone mentioned is what I really miss compared to the B&Ws.

 I also need to adjust the treble +5 to make them sound okey. The bass is set to 0 and loudness off as I have had it before. That should not be necessary  in my opinion.

Is there a "replacement kit" to buy for the capacitors in the pentas if I need to change them? I would also like to find a new "top plate" in stainless steel, there is an ugly dent in one of them.
 

Hi, I have penta 3's and found that they to were lacking a bit in the top end. I found that its because they are too close to the wall (infact in a corner). I have no option but to put them where they are so I have to adjust the treble up to about 3 (this is playing through a Ouverture)

Have you checked all the setting buttons on the amps because the bass setting have to be on minimum.

hope this helps

@graham dry your eyes mate😂

I have now tried to move them around and there is a difference to the better now. They are in a corner but 50cm from both walls, earlier, appr. 25cm. All settings are correct, and the bass is set to minimum.

After having played them at least 10 hours since I bought them there also seem to have been som changes in the sound character that is not due to my adjustments. The treble has "woken up" a little and I have turned down the level a bit. The speakers have been standing in a cellar for 5 years before I got them, could perhaps have something to do with it.   

 The midrange and treble sounds unnatural in a way I can not accept. I have read the tread about the "high end pentas" and ICE-power conversion is interesting, however I still think there is something wrong with these. Capacitors in the filters is a possibility. I will update when I have tried out the speakers with the bm7000 as amplifier.
 

Have a look ;)