Owner manual
1. Introduction
Thank you for your purchase of the DV-507MKII tonearm.
DV507MKII is a high-performance tonearm with many advanced features, which en-
able it to transmit signals on the record precisely through a cartridge. The original
mass-separation or 'bi-axis inertia' arm was the 505. The 507 MKII is the latest de-
velopment of that revolutionary design with greatly enhanced performance and ease
of use thanks to a major redesign.
Correct installation, set-up and operation are important to provide the best sonic per-
formance.
Please read this instruction manual carefully before attempting installation and use.
2. What is the bi-Axis inertia controlled tonearm.
The tonearm is required to fulll two functions so that the cartridge can reproduce
the exact signal from the record groove. One of these is to hold the cartridge station-
ary at audible frequencies so that the stylus and cantilever motion is translated into
a music system without losses. The other is to allow the cartridge to track warped re-
cords. These require totally contradictory properties from the tonearm and so all con-
ventional tonearms are a compromise between the two. However, a very reasonable
solution exists in the bi-axis tonearm.
The bi-Axis inertia control tonearm is in effect two arms in one - the main arm beam
has an effective-mass that is 3 or 4 times higher compared with conventional tone-
arm but moves only horizontally. On the other hand, the sub-arm has a lower effec-
tive-mass than any conventional tonearm but moves only in the vertical direction.
This combination means that the high effective-mass in the horizontal direction holds
the cartridge steady at audio frequencies, especially at low frequencies and high
groove excursions, whilst the low vertical effective-mass allows unmatched warp rid-
ing performance.
The DV507MKII has unique, non-contact, electro-magnetic damping system that re-
quires no maintenance or adjustment unlike the usual oil damping system. With the
new MK11 this damping is further enhanced by the use of neodymium magnets.
DV507MKII Instruction Manual