400RB-IV Series
Tech Talk
Characteristics of the 400RB-IV:Equalization:
The 400RB-IV Series is a flexible, state-of-the-art BassStandard tone controls and graphic equalizers give
Amplifier, designed to deliver maximum performance,you plenty of variation, but they don?t provide what
and be simple to operate. This is accomplishedTech Talkthe instrument really needs. The fact is, graphic
through a few, very important features:equalizers are intended for room equalization. The
.?Extremely high current power supply andequalization in Gallien-Krueger amplifiers reflects 30
power amp circuitry, gets the sound out ofyears of continuous development and refinement. The
your head.GK equalizer is unique to the industry, it?s not just a
.?Four, Bass specific bands of activenormal four band equalizer, each section is a special
equalization for precise tone control.circuit optimized to perform a Bass specific job in its
.?Three voicing filters for shaping andrange of operation. These sections are wired in Series,
customizing your sound.so they add to one another creating a tremendously
.?Balanced direct output with level controlflexible equalizer, that doesn?t sound weird at any
eliminates need for a direct box.setting. Now it is possible to obtain the sound you
.?Continuously variable fan cooling.desire.
Current Output & Bass Response:
When a power amplifier is pushing several speaker
cones, and a high-power transient like a string slap
comes along, the amp has to tap into a large power
reserve to maintain cone control. If the amplifier
doesn?t have this ability, the sound is unresponsive
and less out front. The amp loses it?s punch and feel
at higher playing levels. Instead of responding to
your every command, the amplifier simply cuts those
transients off, leaving you with the feeling that
something is missing in your sound.
Since most amplifiers have limited output current
capacity, they need ?current limiting circuits? to
protect against self-destruction. High-power tran-
sients trigger these circuits, which rob the amplifier of
it?s ability to control speaker cones. This creates a
mushy, unresponsive feel to your sound.
The 400RB-IV Series has extremely high current
capacity, so it doesn?t need current limiting circuits
for over-load protection.
There is nothing in the 400RB-IV Series power amp to
come between you and your sound except faithful,
raw power.
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