Running in a pair of cm6, had them playing for about 20hours and they are still no where near my old cm5 s1. Called bw and was told they need about 72 hours. Is that for real or they are having me on?
many thanks
many thanks
Animesh Ghose said:Called bw and was told they need about 72 hours. Is that for real or they are having me on?
chebby said:You are running in CM6s when you already have PMC Twenty 21s?
What went wrong? The Twenty 21s can only be about 2 years old at most.
Animesh Ghose said:Running in a pair of cm6, had them playing for about 20hours and they are still no where near my old cm5 s1. Called bw and was told they need about 72 hours. Is that for real or they are having me on?
many thanks
drummerman said:The OP didn't like the PMC's.
As to running them in ... I can't remember the last time I had to do that with speakers (my Usher's) but my Grado Headphone's certainly 'relaxed' in the first two or three days.
You say 'no where near' which is a little worrying. Whilst I would expect some slight changes it probably won't be drastic.
Perhaps they are different but better for it once you get used to it?
Hope they work out for you.
Vladimir said:When was the last time you heard the CM5s? You loved them, then you loved the 21s more, now you went for a third different speaker which you hate while still referencing to the CM5. When people are lost they run in circles.
Animesh Ghose said:Vladimir said:When was the last time you heard the CM5s? You loved them, then you loved the 21s more, now you went for a third different speaker which you hate while still referencing to the CM5. When people are lost they run in circles.
i heard the cm5s last time before i sold them which was just before xmas. I got nothing against the 21s they sounded great but i wanted to get back to bw and do 1 better hence the cm6. Hopefully they will be fine as thing stands i think 21s sounded more refined but with time cm6 with will get better.
chebby said:Animesh Ghose said:Called bw and was told they need about 72 hours. Is that for real or they are having me on?
Depends on the manufacturer what you get told. Some say get them to room temperature and play something fairly loud for a few minutes. (Harbeth.) Others seem to require weeks or months of 'running in' (depending on how often per day you listen).
If you listened for a couple of hours a day, 6 days per week and someone told you to wait for 72 hours ( = 6 weeks) then i'd tell them where to shove it because that exceeds the dealer's returns period leaving you without the option to take them back if you don't like them after they've 'burnt in'.
I suspect if you don't like them after 20 hours then you aren't going to like them full-stop. That is because I believe that 'burn-in' or 'run-in' are myths (or at least take only a small fraction of what we are told by manufacturers and dealers). The biggest part of the whole process is your brain getting used to a new sound and trying to forget it's own 'myths' about what the old pair sounded like.
**** around with positioning the new speakers and see if that helps. It can make a profoundly bigger difference than holding your breath until the speakers have 'run-in'
iQ Speakers said:There are measured differances after a speaker has run for say 50 hours.
Animesh Ghose said:Thanks every1, today being sunday i got a bit of time to play around the speakers and having played them at fairly high volume -35 db according to my amp, speakers have opened up rather nicely, specially the bass, it got a lot cleaner as oppose to muffled. Tweeter on top does make a huge differnce, it does presents a wider sound stage. This is the BW sound i have always enjoyed and this is the sound i was looking for.
Money well spent (a lot of it for my liking)
Thompsonuxb said:Suspect this is a case of the rose tinted glasses effect.
Chances are if you went back to the CM5's you'd be disappointed.
Keep playing your music - I'm of the opinion burn in is real I've experienced it myself - the CM's have pretty exotic materials that make up their cones. They will take time to loosen.
Like new jeans ....
andyjm said:Unlike a lot of Hifi old wives tales, at least running-in speakers could have a grain of sense underlying it. I can just about imagine that the compliance of the elastomer cone surround and spider on high-excursion (bass) drivers might change over time with usage.?
I can't imagine however that it will be a large change, or that there will be a 'night and day' difference. I have searched the web and I can't find a single frequency response test comparing speakers out of the box, with the same speaker after a period of use.?
Back in the day when I used to do this sort of thing for a living, we never worried about 'running speakers in', nor did anyone I know refer to it.
I would really like to see some real data on this (it wouldn't be hard to test), but my best guess is that if there is any effect that it will be small and probably not audible.
SteveR750 said:I agree Andy, and some drivers seem to change more than others. For example, some of the new car stereo drivers have become smoother and more extended less distorted bass after a few hours of heavy use, whereas the ATC drivers don't appear to have changed at all. FWIW Ben Lilly of ATC doesn't think they're is any driver burn in that alters the sound. Maybe some (cheaper?) drivers might undergo bigger changes in mechanical properties than better designed and manufactured drivers.
Vladimir said:SteveR750 said:I agree Andy, and some drivers seem to change more than others. For example, some of the new car stereo drivers have become smoother and more extended less distorted bass after a few hours of heavy use, whereas the ATC drivers don't appear to have changed at all. FWIW Ben Lilly of ATC doesn't think they're is any driver burn in that alters the sound. Maybe some (cheaper?) drivers might undergo bigger changes in mechanical properties than better designed and manufactured drivers.
Maybe if Ben Lilly didn't make ATC speakers with voice coils as big as sperm whale nipple rings he might think otherwise.