If you hear no longer DJ Console MK2 Deck A and Deck B in headphones preview mode, then you may have upgraded DJ Console MK2 drivers to the last release (2.cmk2.2007) but you have forgotten to update your version of VirtualDJ.
To restore a proper preview mode, you must
- either install VirtualDJ 3.4.1 ,
- or switch in ASIO mode (run VirtualDJ in mode "Equalization on audio inputs").
You can power Mobile DJ MP3
- either with 2 pre-charged batteries (C type / LR14) (Alkaline or zinc carbon batteries)
- or with 2 rechargeable batteries (C type / LR14) (Nickel-Metal-Hydride (NiMH) or Nickel-Cadmium (NICAD or NiCd))
The only difference is the operation time, which is longer for alkaline batteries.
It is not recommended to power Mobile DJ MP3 with 1 rechargeable battery + 1 pre-charged battery since their operation times are different and their voltage are different (1.5v for the pre-charged battery versus 1.2v for a rechargeable battery).
Donald Bell from CNET has released a review of Mobile DJ MP3 on
http://reviews.cnet.com/audio-components/hercules-mobile-dj-mp3/4505-3022_7-32466616.html?tag=prod.txt.1#more
This review is also on ZDNET
http://review.zdnet.com/audio-components/hercules-mobile-dj-mp3/4505-3022_16-32466616.html .
Battery lifetime depends on your battery model
- alkaline batteries capacity is the highest (up to 7500 mAh)
- carbon zinc batteries capacity is lower than alkaline
- rechargeable batteries have the smallest capacity (up to 3000/4000 mAH per charge, but you can recharge them).
Mobile DJ consumes over 300mA with LCD backlight on, but not much as soon as the LCD switches off.
Mobile DJ should provide continuous mixing for
- 15 to 25 hours with 2 fresh rechargeable batteries (akkus)
- 30 to 50 hours with 2 good alkaline batteries.
It may be shorter with old batteries and longer with excellent batteries.
