TL Audio VTC - Manual (Page 3)

3
1.1 INPUT CHANNEL OVERVIEW
•
Uncluttered Channel Preamp section containing a high quality low noise mic amp that
combines an SSM 2017 solid state stage with an ECC83/12AX7A secondary valve stage,
variable input gain (16 to 60dB), useful 90Hz high pass filter (12dB/octave), and switches for
mic/line, phase reverse, and +48v phantom power.
• A Tape Return Preamp featuring an ECC83/12AX7A valve stage, +/-20dB trim control,
internal -10/+4dB level matching link and channel/monitor flip switch.
•
Six mono Auxiliary Sends accessed via four level controls. While aux sends 1 & 2 have
dedicated level controls, aux sends 3/4 & 5/6 share a pair of level controls on each channel: a
single shift switch governs whether the controls feed sends 3/4 or sends 5/6. Auxiliary sends
1/2 are permanently set post fader, while 3/4 (and hence 5/6) are switchable ‘pre’ or ‘post’
fader. A dedicated stereo send (7/8) is switchable pre/post fader, making it the obvious choice
for feeding a headphone cue mix or a stereo effects unit. Sends 3/4, 5/6 & 7/8 can be assigned
to the Mix B signal path via a simple and flexible switching system.
• Four Band EQ with LF/HF shelving and two superb fully parametric mids. The EQ can be
assigned in part or totally to either channel or Mix B signal paths. 15dB of boost/cut is
available on each EQ band, and the ‘Q’ is variable between 0.5 and 5 (this corresponds to a
bandwidth range of 0.2 to 2 octaves). The EQ also features an EQ ‘On’ switch with status
LED, allowing an easy comparison between flat and EQ’d signals.
• Separate Mix B facility with a 60mm fader, Solo, Mute and Pan. EQ can also be reassigned
from the Channel to the Mix B signal path using the HF/LF and HM/LM buttons. Should a
third party automation system be fitted, the Stat and Auto switches are intended for local status
switching and VCA bypass respectively. In addition a Srce-Ch (Source channel) switch routes
the main channel fader signal into the Mix B section as well, allowing a separate mix of the
main channel signals to be set up on the Mix B faders.
•
Signal Present and Peak LEDs are provided on both channel and Mix B sections.
• Main Channel with flexible and simple routing system fed from a 100mm Alps type fader.
Routing is provided to each of the eight groups (in pairs), direct outputs or stereo L/R mix. The
main channel also features Solo, Mute, Pan, Stat, and Auto facilities, much like the Mix B
section.
• A versatile Tape/Direct Output system enables multitrack connection without re-patching by
using the Buss switch on the main channel. When the Buss switch is not depressed, the
channel signal is fed directly through to the tape output on that channel, thus acting as a direct
output. When the Buss switch is depressed, the tape output is then fed from the output of the
relevant group fader (group fader 1 feeding channels 1, 9, 17, 25 etc). This is explained in
greater detail in sections 3.7 and 4.9.