Thermionic Culture THE ROOSTER 2 2 Channel mic, pre amp with eq - Manual (Page 8)

©Thermionic Culture Ltd., May 2014 7
2.10 LPF switch
Switches a Low Pass Filter in or out of circuit after the
distortion valve. This is included because, in situations
where all stages of The Rooster 2 are being pushed
into extreme distortion, it may be necessary to tame
the excessive high frequency content created by the
distortion itself. This control can provide a smoother
kind of extreme distortion to the signal. This filter starts
acting above 5kHz and is 6dB down at 10kHz.
2.11 Mode switch
This switch determines whether The Rooster 2’s 5654
valve is to be used as a Triode or Pentode valve.
Triode valves tend to give predominantly 2
nd
order
harmonic distortion when driven hard whereas
Pentode valves give predominantly more 3
rd
order
harmonics. 2
nd
order harmonics will tend to sound
smoother and 3
rd
order harmonics will give a more
aggressive effect.
2.12 Attitude switch
The ‘Attitude’ switch allows the user to determine how
much distortion, or THD The Rooster 2 will add to the
signal. At position ‘1’ The Rooster 2 is capable of
delivering a very clean signal (well below 0.1%), but
as the control is stepped towards ‘Max’ the distortion
provided by The Rooster 2 will increase.
This does also rely on the setting of the ‘I/P Level’
control, which if turned down will decrease distortion
and when turned up increases distortion. With both
controls set to maximum the distortion will be very
extreme, and the output control will need to be
reduced to a low level.