User's Guide

Miscellaneous 60
User Guide
Disclai-
mers
The manufacturer, importer, and distributor shall not be liable
for damages including accidental and personal injury due to
the improper use or operation of this product. The information
in this user manual was written based on current product
specifications. The manufacturer, Dreamus Company, regularly
adds new features via OTA updates and will continue to apply new
technologies in the future. Product specifications may be changed
without prior notice. There is no warranty against data loss due to
the use of this product.
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED
BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING
TO THE INSTRUCTIONS
The device must be used a minimum of 5mm away from the body in
normal use conditions.
The excessive sound pressure from earphones and headphones can
cause hearing loss.
Astell&Kern PPM51 includes MQA technology, which enables you to
play back MQA audio files and streams, delivering the sound of the
original master recording.
The PPM51 Now Playing status shows a green or blue light to
indicate that the unit is decoding and playing a MQA stream or file,
and denotes provenance to ensure that the sound is identical to that
of the source material. A blue light indicates it is playing a MQA
Studio file, which has either been approved in the studio by the
artist/producer or has been verified by the copyright owner.
The MQA logo is a trademark of MQA Limited. © MQA Limited 2019