Denon PMA-2000R - Manual

PMA-2000R
A u d i o p h i l e I n t e g r a t e d A m p l i f i e r
The PMA-2000R uses dual power transformers to provide extended high current capability with substantial
power output. The chassis is divided to enable efficient placement of circuits so that left and right signal paths
do not interfere with each other and negatively affect sound quality between the two channels.
■ 80 W + 80 W. More Power, and Greater
Dynamic Range via UHC Ultra High Current
Single Push-Pull Circuitry
A high-current UHC-MOS amplification device has been used
to boost the power supplied to the UHC single push-pull circuit-
ry. This is an innovative design by DENON that finally resolves
the conflicting problem of how to produce a solid capacity to
drive the speakers while preserving the delicate details of the
music. The PMA-2000R provides 80 watts per channel into
8 ohms with nearly double that into 4 ohms to drive virtually any
speaker system. Superior current linearity ensures a stable
supply of current to the speakers, bringing out all of the dynam-
ic range irrespective of impedance or efficiency.
■ The UHC-MOS High-Current Amplification Device
To obtain the ability to bring out all the delicate nuances of
sound and the need for dynamic speaker drive, the
PMA-2000R has adopted a high-current UHC-MOS amplifi-
cation device capable of delivering a peak current of 120A to
the output stage, as much as 3~10 times greater than that of
conventional MOS-FET devices. The current supply capacity
of the UHC-MOS has been improved to exceed even that of
bipolar transistors while preserving the high-quality sound of
MOS-FETs. This ideal amplification device also incorporates
single push-pull technology to eliminate variations in amplifi-
cation operation.
■ Leakage Canceling Dual Power Transformers
The PMA-2000R features dual parallel-connected twin trans-
formers with vastly improved characteristics in the magnetic
and coiled wire circuits as originally developed for the
DENON POA-S1 monaural power amp. The transformers
have also been “leakage canceling” (L.C.) mounted in order
to eliminate mutual interference caused by magnetic fields
and other factors. As a result, leakage flux from the power
transformers, a potential source of noise, is suppressed to a
minimum, enabling the PMA-2000R’s power supply section
to supply clean, high-quality DC energy to the output stages.
Comparison of single push-pull output current characteristics
(Source: DENON)
UHC single push-pull BJT single push-pull
Comparison of transformer leakage flux
(Source: DENON)
Two LC mounted transformers Two transformers positioned
at same polarity
Leakage cancelling (L.C.) mounted dual power transformers
NEW MODEL INFORMATION