Ashly MOS-FET POWER AMPLIFIERS CFT-SERIES - Manual (Page 4)

The CHASSIS GROUND tenninal is internally connected to the chassis, the AC earth
ground, and the power iimplifter’s signal ground. The INPUT GROUND tenninal is tied
to the XLR pin 1 and the 1/4" jack sleeve. It is recommended that the input and chassis
ground terminals remain connected with the factory-supplied jumper strap.
in situations where the power amp and its signal source are separated by great
distances, a ground voltage diilerence may exist between the amp's chassis ground and the
inputcable'sground. Connectionofthesetw'ogroundsthroughihejumperstrapmaycause
large ground currents to flow (which is known as a ground loop), causing a hum noise in
the amp’s output. Unless you have such a situation with a hum problem that cannot be
solved by using balanced input connections, the ground jum^Kr strap should remain in
place.
2. NORMAUBRiOGING SWITCH
This switch selects between NORMAL mode in the “out” position where both
channels are in-phase, and BRIDGING mode In the “in” position where channel 2
is switched out-of-phase. In bridging mode, the channel 1 red binding post is the (+)
in- phase speaker output terminal and the channel 2 red binding post becomes the
(-) out~of~phase speaker terminal. To make the switch non-accessibie, its gray
button is removable by simply pulling it straight off.
3. STEREO/MONO SWITCH
This switch selects between STEREO mode in the “out” position and MONO
mode (where channel I input is routed to both channels of the amp) in the “in”
position, in mono mode, an input signal needs only to be connected to channel 1.
To make the switch non-accessibie, its gray button is removable by simply pulling
it straight off.
4. LEVEL CONTROLS
The level controls allow attenuation (calibrated in dB) of the input signal. In
MONO mode, the CHANNEL ONE level control affects both output levels and
CH ANNEL TWO level control is unused. It is recommended that the level controls
are operated at full level (0 dB attenuation) in most situations to maximize the
headroom in the signal source.
5. SPEAKER OUTPUTS
A pair of dual banana binding posts provide the stereo speaker outputs, in
BRIDGING mode, the channel 1 red binding post is the (+) in-phase speaker output
terminal and the channel 2 red binding post becomes the (-) out-of-phase speaker
terminal. CAUTION! NEVER CONNECT THE TWO RED BINDING
POSTS TOGETHER OR CONNECT EITHER RED BINDING POST TO A
BLACK BINDING POST!
Ashly FTX/CFT Owners Manual Page 4
Low \
Level
10 o
Output
Modes
1 as
/■ High (FR|
Level
Phase-
*360
/,N
5
dS
0
Ch.gjCh-l
I.Low High tFR)
a,Low I Low
3. Bridged Low
Ch.a is {+1
\ mSH ;
A A
/ i \
0
CD
Horn EQ
5
__ Highpass
aMM. Fait Range
CAunOM: Never Send Fell Range
Signai To High Frequency Drivers.
Input
, , Ground
IN i S----
Installed
Crossover
Frequency:
t-l
XR-1
R3WERCARD input Option!
aadS/Oct.i Two-Way i
Crossover
-3-l\
/
-6 ^
input
Level
X X XX
Balanced Input
{Pin 2 Hot)
_l Cnaasis
Ground
Aux
Low Oct fPre Level]
O
A lèx
Hign Out
¡Pré Lewjl]
Figure 8: Crossover Input Option
----------Microphone inputs [Mono] -
* „1. -2-
10 0
-J—
— Master
Leve!
4 f s
Stereo M. Norm
Mono jm. Bridge
\y
3^ '
/ v,.y V....X
i i; i i ii ''kj'C'
I
LowCut
(Mica Crilyî
£- -s
ASHL^
/ a \\ \ ;■ Mic 1
\ / ji v\ X / //' tisvd
Mio 2
Level / 0"
MM-6
f) ( HSnd ( HSnd
\ ' / V { f \ Î / N i /
V' V.... X/...
/ \ f \ / \ / \
0 10 0 10 0 10 0 10
, Ch.1 Ch.£ Ch.3 Ch,4
■ Line Level Line Inputs-
0
-L
POWERCABD
input Opdon
Mic/üne Mixer
L = Amfritfier Charitiei 1 Output
R = Amplifier Channei £ Output
Mono Mode Sums the Stsroo Signait
Send
^ ctrrTJ
I RoUjrn
- insert Points
(Post Master Level J
Figure 9: Mic/Line Mixer Input Option
Ashly FTX/CFT Owners Manual
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