SPL Iron V2 Two-Channel Tube Mastering Compressor (Black/Silver) - Manual (Page 22)

22
Control Elements
Link
The IRON mastering compressor has been designed as a completely independent
two-channel, dual-mono compressor and can be used to process two different mono
signals at the same time. Nevertheless, you can also easily process a stereo signal. All
settings are made with switches or a detent potentiometer (Threshold). This allows you
to effortlessly make the same settings on the left and right channels. The components of
both channels have been especially selected so that the difference between them is as
little as possible, considering a very small tolerance range.
However, if you activate the Link function. all settings of the link channel are applied to
the right channel thanks to an intelligent logical relay circuit. This is true for the Thresh-
old, but also for the Attack, Release, Bias, Side Chain EQ, and Rectifier settings. Keep in
mind that when Link mode is active, only the external side-chain insert send of the right
channel is active.
The combination of both control voltages makes it easier to process a stereo signal more
precisely. It allows you to concentrate on the music without having to worry about cor-
recting a parameter on the other channel.
And it can also be put to use creatively. For instance, with the Link function not activated,
a sound that only exceeds the Threshold on the left channel would trigger the compres-
sion on the left channel only. However, if the Link function is activated, the right chan-
nel is compressed, too. When processing stereo signals in dual-mono mode, the stereo
image is acoustically perceived wider.
VU switch
Use this three-way switch to toggle the display between Gain Reduction and Output level
(0dB and +10 dB). This can be done for each of the two VU meters separately. The meters
work independently for each channel, even when the Link function is activated.
The CAL trimmer allows you to calibrate the display of the Gain Reduction on the VU
meter. The IRON‘s Gain Reduction VU-meter ought to show 0dB after the warm-up phase.
0 dB on the VU meter correspond to an output level of 0 dBu.
Channel switch
The two, centrally located, orange-lit switches activate or deactivate the corresponding
left and right channels.