9dh:
Hi There
Need some help.
I have just acquired some BL3's to connect to my mac. B&O made a custom cable for me ( Din connections leading to a 3.5 jack). When I connect this to the mac headphone socket or the iphone headphone socket everything works OK although there is a slight buzz from the speakers before I start the music. However if I connect to airport express or the iphone dock the volume is extremely high and reducing volume settings on the mac or iphone has no effect. Also in all cases the speakers do not go in to standby when closing itunes or turning off the iphone.
Any reasons or solutions very welcome
Many thanks
David
I would strongly recommend placing a DAC between your Mac and the BL3s. The Mac's on-board digital-to-analog converter is good for earbuds, but isn't sending your BL3s a signal they deserve. Most Macs have toslink optical out from the same minijack plug you're using now - you could get a DAC such as the DAC Magic from Cambridge Audio - http://www.cambridgeaudio.com/content.php?PID=320&COID=150
This one doesn't have volume control, but as pointed out above, you can control that from your Mac, or even using an iPod Touch or iPhone, controlling the Mac. Putting an audiophile volume control in a DAC makes it a lot more expensive, and you don't need it.
The BL3s would be connected to the RCA-plugs on the left, and you would feed the DAC either through USB or Toslink optical (the Mac will instantly recognize it, and give you that option in the Audio MIDI Setup application that you find in the Utilities folder). And you get a coaxial digital out which you can use to connect to a pair of BeoLab 5s, should you ever get those ...
You've probably already noticed that the BL3s "scratch" painfully when you remove or connect the minijack plug. That's because of impedance, and the sensitivity of the BL3 amplifiers. Having a DAC between your Mac and the speakers will help ensure you don't damage the tweeters, give you much better sound, and spare you some discomfort!