Crate Amplifiers Stereo Amplifier MFX1200 User Manual

Owner's Guide  
for the  
CRATTEE  
Guitar Amplifier  
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Guitar Amplifier  
Important Safeguards and Precautions:  
All Crate products are designed for continuous safe operation. Abiding by the following  
rules can help prevent damage to your amplifier, yourself and others.  
The amplifier is equipped with a three-pronged AC power cord. To  
reduce the risk of electrical shock, NEVER remove or otherwise attempt  
to defeat the ground pin of the power cord.  
Connect the amplifier ONLY to a properly grounded AC outlet of the  
proper voltage for your amp.  
Avoid sudden temperature extremes, rain and moisture. Also, avoid  
sudden and intense impact. (If the unit has been subjected to any of the  
preceding abuses, have it looked at by an authorized service center.)  
• Do not expose the unit to splashing or dripping liquid. Do not place liq-  
uid filled objects on the unit.  
NEVER set the amplifier on a support that will not bear its weight.  
Always keep the total speaker impedance at or above the rated load.  
Unplug the amplifier before cleaning it. NEVER spray liquid cleaners  
onto the amplifier. Wipe it with a slightly dampened, lint-free cloth to  
remove dirt and film.  
DO NOT use the amplifier if it has sustained damage to the chassis,  
controls, or power cord. Refer the unit to an authorized service center  
for inspection.  
Prolonged exposure to high volume levels may cause permanent hear-  
ing loss or damage. Such damage is progressive and irreversible!  
Declaration Of Conformity  
#30, Effective 01-01-2001  
Manufacturer’s Name:  
Production Facility:  
SLM Electronics  
11880 Borman Drive, St. Louis, MO 63146, USA  
700 Hwy 202 W, Yellville, AR 72687, USA  
1400 Ferguson Ave., St. Louis, MO 63133, USA  
1400 Ferguson Ave., St. Louis, MO 63133, USA  
Production Facility:  
Shipping Facility:  
Office Facility:  
Product Type:  
Audio Amplifier  
Complies with Standards:  
LVD:  
Safety:  
EMC:  
92/31/EEC, 93/68/EEC, & 73/23/EWG  
EN60065  
EN55013, EN55020, EN55022, EN61000-3-2,  
& EN61000-3-3  
Supplementary information provided by:  
SLM Electronics - R & D Engineering  
1901 Congressional Drive, St Louis, MO 63146, USA  
Tel.: 314-569-0141, Fax: 314-569-0175  
3
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Guitar Amplifier  
The Front Panel:  
1: INPUT: Use this 1/4” jack to connect your  
instrument to the amplifier by means of a  
shielded instrument cable.  
the high frequency output. Rotating the control  
clockwise increases the high frequency out-  
put. The High control provides a range of 10dB  
of boost or cut at 10kHz.  
OVERDRIVE CHANNEL: A high gain channel  
giving you sounds from a slight edge to seri-  
ous overdrive.  
8: LEVEL: Use this control to adjust the output  
level of the Overdrive channel.  
2: GAIN 1: Use this control to adjust the input  
gain for the Overdrive channel. Gain 1 pro-  
duces less distortion than Gain 2 (#3) and is  
active when the Gain switch (#5) is in the out  
position.  
9: CHAN: Use this switch to select the  
Overdrive channel or the Clean channel.  
When the switch is in the out position the  
Clean channel is selected. The Overdrive  
channel is selected when the switch is  
depressed. The adjacent LEDs illuminate to  
indicate which channel is selected. Channel  
selection may also be made with a footswitch  
(#17).  
3: GAIN 2: Use this control to adjust the input  
gain for the Overdrive channel. Gain 2 pro-  
duces more distortion than Gain 1 (#2) and is  
active when the Gain switch (#5) is depressed.  
CLEAN CHANNEL: A normal gain channel  
designed to give you crystal clear sounds.  
4: SHAPE: Use this control to adjust the tone  
of the input signal for Gain 2. Rotating this  
control counterclockwise emphasizes the  
midrange frequencies. Rotating this control  
clockwise emphasizes the low and high fre-  
quencies. This control is active when the Gain  
switch (#5) is depressed.  
10: LEVEL: Use this control to adjust the out-  
put level of the Clean channel.  
11: LOW: Use this control to adjust the bass  
response of the Clean channel. Rotating the  
control counterclockwise reduces the low fre-  
quency output. Rotating the control clockwise  
increases the low frequency output. The Low  
control provides a range of 22dB of boost or  
cut at 80Hz.  
5: GAIN: Use this switch to select Gain 1 or  
Gain 2 for the Overdrive channel. When the  
switch is in the out position Gain 1 is selected.  
Gain 2 is selected when the switch is  
depressed.  
12: MID: Use this control to adjust the  
midrange frequency response of the Clean  
channel. Rotating the control counterclock-  
wise reduces the midrange frequency output.  
Rotating the control clockwise increases the  
high frequency output. The Mid control pro-  
vides a range of 14dB of boost or cut at  
600Hz.  
6: LOW: Use this control to adjust the bass  
response of the Overdrive channel. Rotating  
the control counterclockwise reduces the low  
frequency output. Rotating the control clock-  
wise increases the low frequency output. The  
Low control provides a range of 11dB of boost  
or cut at 80Hz.  
7: HIGH: Use this control to adjust the high  
frequency response of the Overdrive channel.  
Rotating the control counterclockwise reduces  
4
13: HIGH: Use this control to adjust the high  
frequency response of the Clean channel.  
Rotating the control counterclockwise reduces  
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Guitar Amplifier  
the high frequency output. Rotating the control  
clockwise increases the high frequency out-  
put. The High control provides a range of 28dB  
of boost or cut at 10kHz.  
19: POWER: Use this switch to turn the ampli-  
fier on (top of the switch depressed) and off  
(bottom of the switch depressed).  
20: POWER CORD (rear panel, not shown):  
The grounded power cord should only be  
plugged into a grounded power outlet that  
meets all applicable electrical codes and is  
compatible with the voltage, power, and fre-  
quency requirements stated on the rear panel.  
Do not attempt to defeat the safety ground  
connection.  
14: DSP LEVEL: Use this control to adjust the  
amount of digital signal processing to be  
applied to the signal. In the fully counterclock-  
wise position the output signal is “dry” (no  
effect applied). As you rotate the control clock-  
wise the amount of effect increases. The DSP  
may be turned on and off with a footswitch  
(#17).  
Connecting to the Insert jack:  
15: DSP MODE: Use this control to select one  
of the ten digital effects. The nomenclature  
around the Mode control defines the five types  
of effects available. Each effect listed has two  
variations as described below:  
The Insert jack (#16) allow you to patch an  
external effects device into the amplifier prior  
to its power amp stage. Use Crate’s STP201,  
STP202 or STP203 stereo-to-mono Y cord or  
an adapter such as Crate’s YPP117 and two  
1/4” mono signal cables to connect the effect  
as shown below.  
DELAY: Slapback delay  
Long delay w/regeneration  
FLANGE: Light Flange  
Heavy Flange  
Stereo-to-mono Y-cord:  
Y-adapter and 2 cables:  
CHORUS: Slow Chorus  
TIP  
RETURN  
TIP  
RING  
to Insert  
jack  
to Insert  
jack  
Fast Chorus  
RING  
SLEEVE  
SEND  
GROUND  
SLEEVE  
CHO-REV: Chorus w/small room reverb  
Chorus w/large room reverb  
(STP201, 3'  
STP202, 6'  
STP203, 9')  
(YPP117)  
REVERB: Small room reverb  
Large room reverb  
16: INSERT: Use this jack to connect an  
external signal processor to the amplifier.  
Refer to the adjacent illustration for additional  
information.  
(1/4"-TO-1/4"  
MONO CABLES)  
17: FOOTSWITCH: Use this jack to connect a  
two-button footswitch to the amplifier for  
remote control of channel selection and DSP  
on and off.  
to  
to  
effect  
"IN"  
to  
to  
effect  
"IN"  
effect  
"OUT"  
jack  
effect  
"OUT"  
jack  
jack  
jack  
18: ON LED: This LED illuminates when the  
External Effect  
External Effect  
amplifier is turned on.  
5
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Guitar Amplifier  
Suggested Settings:  
Clean:  
Blues:  
Rhythm:  
Lead:  
6
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Guitar Amplifier  
System Block Diagram:  
CLEAN  
CHANNEL  
CHANNEL  
BUFFER  
INPUT  
SELECT  
LEVEL LOW MID HIGH  
FLEX WAVE  
STAGE  
EQ  
OVERDRIVE  
CHANNEL  
SHAPE  
ACTIVE  
GAIN  
LOW HIGH LEVEL  
GAIN  
SHAPE  
MIX  
AMP  
DSP  
INSERT  
LEVEL  
POWER  
AMP  
SPEAKER  
MODE  
7
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Guitar Amplifier  
MFX1200H TECHNICAL SPECIFICATIONS:  
Output Power Rating  
70 watts RMS @ 5% THD 8 ohms, 120 VAC  
100 watts RMS @ 5% THD 4 ohms, 120 VAC  
Maximum Input Signal Accepted  
Input Impedance  
8 volts peak-to-peak  
470k ohms  
Overdrive Channel:  
Low Control 11dB Range @ 80Hz  
Shape Control Proprietary Circuit  
High Control 10dB Range @ 10kHz  
Clean Channel:  
Low Control 22dB Range @ 80Hz  
Mid Control 14dB Range @ 600Hz  
High Control 28dB Range @ 10kHz  
Power Requirements  
Size and Weight  
120 VAC, 60Hz, 230VA  
100/115VAC, 50/60Hz, 230VA  
230VAC, 50Hz, 230VA  
9.38” H x 19.75” W x 9.5” D, 25 lbs.  
The MFX1200H is covered with a durable black Tolex material: wipe it clean with a lint-free cloth.  
Never spray cleaning agents onto the cabinet. Avoid abrasive cleansers which would damage the finish.  
Crate continually develops new products, as well as improves existing ones. For this reason, the specifications  
and information in this manual are subject to change without notice.  
@2002 SLM Electronics, a division of St. Louis Music, Inc • 1400 Ferguson Avenue • St. Louis, MO 63133  
47-628-01 • 04/02  
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