AUSTRALIAN MONITOR LIM 1 User manual

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Australian Nonitor
Provi sion ol Specifications
The new limiter module, designated LIM l, is now available to suit Australian Monitor K-
Series and Opal series power amplifiers. The module fits within the amplifier case, and is
compatible with all existing / new K-series and Opal series amplifiers. Installation is as simple
as removing the amplifier lid, removing a jumper link and plugging in the card. The card is
primarily intended to prevent clipping and limit power delivery.
Applications include the improvement ofsound quality by the prevention ofclipping, which
also prolongs the life of H.F Drivers increasing average power delivery without degrading
sound. The card reduces average power delivery in noise-sensitive venues improving speech
intelligibility.
As with all Australian Monitor electronics, performance and reliability and guarantied. Only
the highest quality components are used - Roederstein resistors, WIMA and Roederstein
capacitors, fully enclosed cermet trimpots and high slew-rate, low noise, low distortion op-
amps. Each module is individually tested to meet a rigorous specification. And, like our
amplifiers, they are built to work in any environment, and built to last.
Features Includs: Sp€cifications:
-high comprcssion ratio Threshold: -20dB to 0 dB re full power
-user-adjustable thr€shold Attack tilne: lmsec to 40 ms€c
-user-adjustable attack time Release time: I 00 rnsec to I . I sec
-user-adjustable release time Compression ratio: 20:l
-Linking facility for multi channel Total Harmonic Distortion
applications (20H2-l0kHz): <0.3o/o
-electrostatic and eleclromagnetic shielding Noise: -95 dB re fuu por€r
for optimum immunity O!€rload Point: + 20 dBu in
to interference. Insert Point: Post attenuator, pre main
A wide range ofadjustment on attack and release times allows the module to be used as either a
peak limiter (short attack, short release) to prevent clipping on transients, or as an rrns limiter (long
attack, long release) to control average power delivery and compress dynamic range. This can be
particularly useful in speech-only applications where maximum intelligibility is needed with limiter
power.
The gain-control element is highly linear, has no efect on the circuit before limiting starts, and
produces no audible distortion while limiting. The signal-to-noise ratio of the amplifiers virtually
unaffected with the limiter in circuit, and the dynamic range is effectively increased by 16dB.
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Australlan Moritor Aushalian Monitor