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Fig. 1: Front & Rear Panel Views
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Product Description
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The PA-4020B Power Amplifier is IRP professional
sound products’ latest version of the legendary
DH-4020. The PA-4020B features improvements
designed to address the needs of today’s
systems integrators. The front panel graphics
have been redesigned to match the appearance
of the other power amplifiers in the PA-Series
product line.
This new unit employs a dual monaural design
for improved reliability; the PA-4020B output power
rating has been increased significantly. However,
the single rack space mount characteristic has
been retained. With convection cooling and a fully
enclosed chassis, the inherent problems of fan
noise and susceptibility to environmental prob-
lems such as dust, smoke and liquids have been
reduced to near negligible levels.
Designed for the Global Market, IRP decided that
the PA-4020B must be one of the most easily
specified and installed amplifiers available. This
iis reflected in its overall design and feature set.
The amplifier is able to operate on 120 or 240 volt
ac power at 50 to 60Hz.
With convection cooling, when idling, the unit
draws very little power, thus producing remark-
ably little heat. Inasmuch, as it utilizes signal de-
pendent switching power supplies, the highly effi-
cient PA-4020B has one of the lowest idle cur-
rents of any power amplifier available to the Audio
Industry.
This highly stable discrete power amplifier has a
power handling rating of 180 watts per channel
into 8 ohms and 250 watts each channel into 4
ohms. In mono-bridged mode it will provide 450
watts to an eight ohm load. Both bipolar amplifier
sections employ switchable transient current
limiters and a turn on delay for speaker protec-
tion.
The input and output connections for this
amplifier will accommodate virtually any
permanent or portable application. The rear panel
is arrayed with XLR, Neutrik
Speakon, binding
posts and removable screw terminal connectors.
Few power amplifiers available offer as much
flexibility, power handling, and quality performance
as the IRP PA-4020B.
