Dynacord Professional Power Amplifiers - Manual (Page 14)

P
ower
H s
eries
14
topologies meriting consideration
to two concepts only: Class D and
DYNACORD’s Linear Grounded
Bridge Class H. Linear Push-Pull
concepts with Class H topology
are proven solutions for power
levels up to 1500 W / 4 Ω.
This is the approach adopted by
many DYNACORD power amplifiers.
The limitation of the Class H push-pull
approach is the 250 V specification
of typical audio power transistors
and their second breakdown
restrictions. Even exceeding the
specified peak voltage or the
the demands placed on modern
power amplifiers are enormous:
maximum output, minimum
weight, the highest possible
degree of efficiency, outstanding
audio characteristics, absolute
reliability, remote supervision
and remote control as well as
network capability.
To realize stable outputs of 2500 W /
4 Ω and 3500 W / 2 Ω per channel,
power amplifiers must be capable
of making available peak output
voltages of 180 V to 200 V. This
requirement limits the number of
second breakdown limit for short
periods leads directly to a failure
of the power transistors and the
power amplifier. The use of exotic
350V-specified transistors affords
no reliable solution in view of their
second breakdown behaviour,
their performance and also their
availability.
Higher power classes require
different solutions! DYNACORD‘s
linear Grounded Bridge designs
(e.g. L2400 / P3000) have proved
extremely reliable over many years
as well as outstanding in terms
PowerH Series
hi-enD remote controllaBle power amplifiers