Ashdown Engineering AFTER 8 Manuel Utilisateur page 13

sUB HARMONICs
This section produces sub Harmonics an octave below the notes being played. The level of these sub Harmonics relative to the straight bass sound
can be adjusted using the LEvEL control.
This is very effective in thickening the sound and you will find in use that only a small degree of this lower octave is required to really fill out the
sound and provide a character that is not possible by any other means.
The degree of sub Harmonics is also dependant on the setting of the BAss control.
dIRECT INJECT (d.I.)
A balanced d.I. is provided on a latching XLR socket. This has a push button placed below it that allows the user to choose either a Pre E.Q. signal
(button pushed IN) or a Post E.Q. Post sub and effects signal (button OUT).
The output signal from this XLR socket is set to a level and impedance suitable for connecting directly into the Microphone input of a mixing desk for
either direct Injection into the PA system or for recording. This must ONLY be used into a Balanced Microphone input, it is not intended for any other
type of connection.
This has a floating ground that is referenced to the mixing console it is plugged into and should not need ground lifting. It is also unaffected by
Phantom Powering on the Microphone input.
Make sure your XLR plug does not have the shell of the plug internally connected to signal ground or this will connect the system to chassis ground of
the ABM and may cause problems with hum.
PUsH TO MUTE
When pushed IN this button mutes the output from the preamp to the power amp, mutes the output from the d.I. socket and mutes the output from
the LINE Out socket as well. This leaves the output from the TUNER socket still available to allow muted tuning. An LEd is provided next to this switch
to indicate when the amplifier is muted. This function operates only from the front panel MUTE push switch. i.e. pressing this button mutes all sound
from the amplifier and allows a tuner connected to the TUNER socket to operate for silent tuning. Release the button and you are back in action
again.
TUNER OUT
This output socket provides a line level signal that can be used for a permanent connection to a tuner.
The signal from this socket remains when all other outputs from the amplifier are Muted allowing all sound from the amplifier to be silenced while
tuning is in progress.
LINE OUT
This output socket provides a line level/post Output Level control signal for connection to an external power amplifier driving additional speaker
cabinets.
OUTPUT LEvEL
The OUTPUT control adjusts the overall level of the amplifier. Adjust this for your preferred overall stage playing volume.
INPUTs
High Input
Low Input
Line Input
Effects Return
OUTPUTs
Tuner Output
Line Output
Effects send
d.I. Output
(rackmount preamp only)
Low Pass (RPM-1 only)
High Pass (RPM-1 only)
Full Range (RPM-1 only)
EQUALIsATION
shape (Push Flat)
Bass
Middle
Treble
slider1 +/-15dB @ 110Hz
slider 2
slider 3
slider 4 +/-15dB @ 2.6kHz
Frequency Response
Rackmount Preamp Crossover
speaker Outputs
Output Power
Ashdown Amplifiers reserve the right to change specifications without notice. E & O E. All contents © Ashdown 2011.
Impedance 3.9M Ohms
Impedance 10k Ohms
Impedance 22k Ohms
Impedance 22k Ohms
Impedance 1k Ohms
Impedance 10k Ohms
Impedance 22k Ohms
600 Ohms balanced
Impedance 1k Ohms
Impedance 1k Ohms
Impedance 1k Ohms
+8dB @ 50Hz & 4kHz, -8dB @ 400Hz, filter slope - 6dB/octave
+/-15dB @ 45Hz
+/-15dB @ 660Hz
+/-15dB @ 7kHz shelving
+/-15dB @ 340Hz
+/-15dB @ 1.3kHz
-3dB at 17Hz and 30kHz
variable between 35 and 160Hz
Minimum impedance 4 Ohms
1000watts RMs into 4 ohms. / 2000watts RMs into 4 ohms.
www.ashdownmusic.com
Input range 150mv to 20v p-p
Input range 300mv to 40v p-p
Input level 0dBu nominal
Input level 0dBu nominal
Level 0dBu nominal
Level 0dBu nominal
Level 0dBu nominal
Level -20dBu nominal
Level switched 0/+4dBU
Level switched 0/+4dBU
Level switched 0/+4dBU
13