iscm
Responses from iscm
| B&W DM70's - top end lacking Looking at the B&W crossover it should be very easy to split the high/mid and bass to allow bi-wiring or bi- amping.I could then get the best out of my 15/25 watt tube amp and use my Unico for the bass. The Unison Unico has 70 watt from MOSFE... | |
| B&W DM70's - top end lacking I have the 57's set up with two Dynaudio BM12s Subs.And how does it sound, as I have heard mixed reports about the results of subs with ELS57's? | |
| B&W DM70's - top end lacking an experiment with the Quad ESL. The experiment did not go well as the B&W crossover Woofer to ESL Panel is 400hz. ct0517: With the Quads, I would have thought that around 200 Hz would be better.I also have a pair of Dali Skyline 2000 and they... | |
| B&W DM70's - top end lacking I did a basic test of the high frequency response and found that the cut off is around 10/ 11 kHz.With a normal tweeter I can hear (just) to 16 kHz.This may explain why symbols seem so recessed and why, depending on the music, things just don't so... | |
| B&W DM70's - top end lacking I just noticed a slight buzz in the right speaker.When I checked, I could see that some of the filling was pushing very slightly against the cone.I corrected this and now the sound it much cleaner.These speakers rely on being totally filled, so it... | |
| B&W DM70's - top end lacking ct0517: The service manual is a great hep.I had no idea that it could be accessed and as it is from 1970 there is a good chance that it is correct for my early versions of the DM70’s.One thing that I notice straight away is that I have a missing p... | |
| B&W DM70's - top end lacking ct0517:Have you ever had you treble panels repaired?If so, where did you go and what was the difference?I know about One Thing, but they are quite expensive and I have heard that their place is a tip. There is also a German man, but I have had mix... | |
| B&W DM70's - top end lacking 23:00 - now 238V and sound seems a lot better.That is near as dam it to 240VCould it just be my imagination?Now 23:30 and voltage bang on 240VBest sound so farIt is like the noise floor has dropped and the treble is better defined.They just sound ... | |
| B&W DM70's - top end lacking 20:45 - 236VTested again as sound seemed a bit better and more lively.Could 3 Volts make much difference or could it just be that the supply is cleaner at this time? | |
| B&W DM70's - top end lacking At 19:30 the sound seemed a bit off so I measured the mains voltage.It came in at 233V.I will measure again later.These days 233V is in the centre or the range, so it will be interesting to see if it gets nearer to 240V later.It may be that the po... | |
| B&W DM70's - top end lacking ct0517. Tonight everything sounds good, although I still think that the treble is a bit recessed.Did you make your own super tweeter?I was thinking of using a ribbon crossed over at around 8 kHz with some sort of pot for adjustment. I presume that... | |
| B&W DM70's - top end lacking ct0517 I see how you have raised your speakers and I did think about doing the same. On my speakers it could be done between the existing stands and the main box, say 6 inches (15cm) should do, I think.It is strange, as this evening, most of th... | |
| B&W DM70's - top end lacking Hi ct0517Thanks for the reply.These speakers are something special.I have the original MK1's.My room has stone floor (with thick fitted carpet) and stone walls.I would say that the room is heavily damped and has very low ceilings.The change of ba... | |
| B&W DM70's - top end lacking Thanks roberjermanI am not ready to ditch them yet.The leak bass units work OK now and I am sure that the surrounds on the original bass units can be fixed.I really wanted to know from an owner what to expect from the treble and if mine need to b... | |
| New system has fatiguing, harsh high frequency sounds. How to fix? In the end I gave my surround system to charity, as my music system was just so much better.The av system was not helped by the fact that films seem to put about 80% of their sound through the center speaker.It was mostly mono with a few effects a... |