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1
INPUT
active
passive
pickup
5
pickup
4
3
3
3
3
3
6
6
6
6
6
2
9
9
9
9
9
1
9
12
12
12
12
12
0
10
15
15
15
15
15
CLIP
GAIN
LOW
MID
CAUTION: REPLACE FUSE
WITH SAME TYPE AND RATING
ATTENTION: UTILISER UN FUSIBLE
TYPE: YS1007
DE RECHANGE DE MEME
TYPE ET CALIBRE
230V
50Hz 1.0A
FUSE: T 1,0A
DESIGNED & MANUFACTURED BY
YORKVILLE SOUND • Toronto, CANADA
The Acoustic Master 150
Your Yorkville AM150 is a stereo, full-range combo amplifier designed to reproduce the
sound of acoustic guitar with realism and projection. And because it is full-range, the AM150
can also reproduce voice, recorded music, keyboard instruments and other signal sources.
Compact size and light weight make the AM150 easy to transport and use almost anywhere.
We believe you will find that the versatility and response of the AM150 will make it a pleas-
ure to use for years to come.
Feature Overview
Channel 1 accepts the output from active or passive acoustic guitar pickups while Channel 2
will accept either a microphone, another guitar (with active pickups), a line-level signal
source such as a CD or tape player or a keyboard instrument, and both channels can be
operated at the same time. Other features include 32-preset onboard digital effects with
which an *optional footswitch can be used to turn on and off. An external effects loop is
included on Channel 2 however that channel also has access to the internal effects system.
Channel 1 features 3-band EQ plus a sweepable notch filter for precise tone shaping without
feedback. Other features include a master volume control, a mono, balanced XLR line output
which is pre-effects (dry) and stereo ¼-inch post-effects (wet) balanced line outputs.
*(footswitch model TFS-1)
Feature Details & Operation
POWER Switch & Indicator
Depress the top or bottom of the POWER switch on the far right side of the control panel to turn the
AM150 on or off. The green LED located under the power switch will illuminate when the unit is on.
Channel 1 (Acoustic Guitar)
INPUT Jack
This is unbalanced with an impedance of 1 meg-ohm and can accept either passive or active
pickups (piezo/coil).
GAIN Control
Adjust this control for the desired volume. Check the CLIP LED for activity – see below.
LOW, MID & HIGH EQ
+/-15dB of equalization is provided for precise tone shaping of the instrument. Center posi-
tion is neutral, turn right to boost frequency gain and left to reduce it. See under CLIP LED
for additional information. This EQ does NOT affect Channel 2.
2
150
INPUT
EFX
3
3
120
625
DEFEAT
6
9
12
15
80
800
Hz
CLIP
EFX
HIGH
FREQ
NOTCH
ACTIVE
z530-1v2
120VAC
60Hz 2.0A
FUSE: T 2.0A SloBlo
Yorkville
ACOUSTI
STIC MASTE
C MASTER
5
5
5
4
6
4
6
4
1. Rvb/Delay/Chor
9. Delay & Chorus
3
7
3
7
3
2. Reverb One
10. Pitch Shift
2
8
2
8
2
3. Flange & Delay
11. Slap Delay
4. Chorus & Pitch
12. Chorus
1
1
9
1
9
5. Reverb & Flange
13. Reverb & Delay
0
10
0
10
0
6. Reverb Two
14. Double
7. Rvb & Chorus
15. Flange
MASTER
EFFECTS
GAIN
8. Detuned Chorus
16. Delay
MASTER
VOLUME
CH. 2
EFX SEND
ACOUSTIC MASTER
LEFT / MONO
8
DIGITAL EFFECTS
7
9
6
10
5
11
BANK B
4
12
3
13
2
14
1
15
16
PRESETS
BANK A
POWER
BAL
CH. 2
LINE OUT
EFX
EFX RTN
(pre-EFX)
FOOTSW.
BAL
RIGHT
LINE OUT
LINE OUT
(post-EFX)
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