Well the BL5s arrived on Sat so I said I'd report back. Well, couldn't be more mixed. Firstly OMG! Turned up they sound amazing BUT.
Havent' totally thrashed them yet was warned not to by the installation team "until they've burnt in a bit" couple of weeks, to let them loosen up a bit ? Taking that advice, have been going through a mixture of stuff. During some quiet classical moments and in between some tracks I began to notice some hiss / crackle on one of the BL5s. This has been fairly consistent from the mid bass speaker and sometimes a bit of transient noise appearing in the tweeter, mid range and low bass no change. Then last night, having had them a little bit louder, at the end of the CD I heard some quiet on / off buzzing from both speakers. I traced this last bit of noise to the laptop charger on the other side of the room. Turned it off and hey presto, the noise / interference want away on the BL5s. Today, the other speaker for a period of about 3-5 minutes displayed continuous crackle from the mid range speaker, then it went away. Dealer is coming back on 13th Aug to investigate.
So what does all this mean??? I have gone down a long list of possible causes and taken the following actions, which brought me to the conclusion that some fault or other with the left speaker (the first one I described) but now it looks like both are prone to electromagnetic interference of some kind. See below first and any help appreciated in suggestions as to what I might do or the dealer might want to think about before driving the 100 miles or so to come and solve it.
If anyone out there has had similar problems, either with the BL5s being prone to this or their own house mains / earth issues then I'd really like to hear them. The speakers are about 7feet apart and my house is modern (8 years old) and is detached with at least 15 feet between each house. Surely I don't have to build a 'Faraday Cage' around my living room or plant a 50ft copper spike in my garden and earth the speakers via two lengths of copper pipe :-( If they're that prone to external noise then I've made a big mistake. Fortunately, my dealer ordered two pairs of BL5s (by mistake) so can bring a fresh set on his next visit).
See the list, help really needed because right now I feel decidely sick !
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1. Disconnected all the digital input and wiring to just leave the powerlink.
2. I have recycled the power (even though the speaker does not use Microsoft Windows) :-)
3. Switched the offending speaker from the Left to the Right channel (input switch on the back). So now both speakers playing the Right channel. The noise problem is still present, only in the left speaker predominantly from the mid front facing bass driver, given the freq range that the noise is in.
4. Replaced the 10m Powerlink Cable with the 5m one. Still no change.
5. Swapped to use the second powerlink socket (both on the speaker and the TV). No change.
6. Used a different 240V wall outlet, no change.
7. Moved the offending speaker as it was near a vertical copper gas pipe coming down the wall which might have been acting like and antenna and upsetting the digital. By this time I had made up my mind that it is the speaker.
8. On the same digital theme, switched off my wireless router and all wireless devices in the house.
This no joke!!!!