XK50 Keyboard Amplifier
User’s Guide
XK50 Keyboard Amplifier
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1. INPUT 1: Use this 1/4” jack to connect your key-
board or other line level signal to the amplifier by
means of a shielded instrument cable. The signal
level at this jack is controlled by the Level 1 knob (#3).
11. LEVEL: Use this control to adjust the overall out-
put signal of the amplifier.
12. LIMIT: The XK50 employs an internal limiter cir-
cuit to help prevent overdriving the output signal. This
LED illuminates when the limiter circuit is activated.
During normal playing conditions, this LED will flash
occasionally. If this LED remains illuminated, reduce
the level controls.
2. INPUT 2: Use this 1/4” jack to connect your key-
board or other line level signal to the amplifier by
means of a shielded instrument cable. The signal
level at this jack is controlled by the Level 2 knob (#4).
3. LEVEL 1: Use this control to adjust the level of the
13. CD INPUT: Use these RCA jacks to connect the
output from a CD player or tape deck to the amplifier.
The signal at these jacks is combined into a mono sig-
nal which is sent to the internal power amp circuit.
Use the CD or tape player’s output level control to
adjust the signal for the proper mix with your instru-
ment.
signal connected to the Input 1 jack (#1).
4. LEVEL 2: Use this control to adjust the level of the
signal connected to the Input 2 jack (#2).
5. PEAK: This LED illuminates when the input signal
level nears clipping. For the best signal to noise ratio,
adjust the Level controls until this LED flashes on
strong signal peaks.
14. INSERT: Use this jack to connect external effects
to the amplifier. This is a stereo R/T/S 1/4” jack: ring =
line out, tip = line in, sleeve = ground. This jack can
also provide a line out signal - insert a mono T/S 1/4”
plug half way into the jack to obtain the signal. (This
will not interrupt the signal going into the internal
power amp.)
6. LOW: Use this control to adjust the bass response
of the amplifier. Rotating the control counterclockwise
reduces the low frequency output. Rotating the con-
trol clockwise increases the low frequency output.
7. LO MID: Use this control to adjust the “thickness”
or “fatness” of the amplifier. Rotating the control coun-
terclockwise reduces the lower midrange frequency
output. Rotating the control clockwise increases the
lower midrange frequency output.
15.
(HEADPHONES): Use this jack to connect
headphones to the amplifier. The internal speakers
are disconnected when this jack is used.
CAUTION: To avoid possible damage to your
hearing, do not use headphones for extended
periods of time at extremely loud levels.
8. HI MID: Use this control to adjust the clarity and
definition of the amplifier. Rotating the control coun-
terclockwise reduces the upper midrange frequency
output. Rotating the control clockwise increases the
upper midrange frequency output.
16. ON: This LED illuminates when the amplifier is
turned on.
17. POWER: Use this switch to turn the amplifier on
(top of the switch depressed) and off (bottom of the
switch depressed).
9. HIGH: Use this control to adjust the high frequency
response of the amplifier. Rotating the control coun-
terclockwise reduces the high frequency output.
Rotating the control clockwise increases the high fre-
quency output.
18. POWER CORD (rear panel, not shown): The
grounded power cord should only be plugged into a
grounded power outlet that meets all applicable elec-
trical codes and is compatible with the voltage, power,
and frequency requirements stated on the rear panel.
Do not attempt to defeat the safety ground con-
nection.
10. REVERB: Use this control to adjust the amount of
reverberation added to the signal. With the control
fully counter clockwise, the signal is dry - no reverb
added. As you rotate the control clockwise the
amount of reverb added increases.
XK50 Keyboard Amplifier
XK50 TECHNICAL SPECIFICATIONS:
Output Power Rating
Gain
50 watts RMS @ 2% THD, 8 ohm load – 120 VAC line
50dB, tones at 12:00 @ 1kHz
Tone Control Range
Low: 18dB @ 50Hz
Lo Mid: 21dB @ 150Hz
Hi Mid: 16dB @ 1kHz
High: 29dB @ 10kHz
Input Impedance
Maximum Signal Accepted
Insert Jack
10k ohms
10 volts peak to peak
Line Output (Max): 2.5 volts peak to peak
Line Input (Max): 2.5 volts peak to peak
Speaker Size and Rating
Crate Custom Design 12” w/ 1.5” voice coil,
30 oz. magnet; power handling 100 watts
Piezo Tweeter; power handling 150 watts
Cabinet Type
Port Tuned enclosure
Input Power Requirements
120 VAC, 60Hz, 85VA
100/110 VAC, 50/60Hz, 85VA
230 VAC, 50/60Hz, 85VA
Cabinet Size and Weight
21.5” H x 17.5” W x 15” D, 39.5 lbs.
Declaration of Conformity
Manufacturer’s Name: SLM Electronics
Corporate Headquarters: 1901 Congressional Drive, St. Louis, Missouri 63146
Primary Production Facility: 700 Hwy 202 W, Yellville, Arkansas, 72687
Product Type: Audio Amplifier
Products meet the regulations for compliance marking under:
ETL standards UL6500, UL60065, or UL813
CSA standards E60065 or C22.2 No.1-M90
CE safety standard EN60065
CE EMC standards EN55103 or EN55013 and EN61000
C-tick designation Level 2, ABN #56748810738, ARBN# N222
KETI standard K60065 (limited model approval)
Compliance Support Contact: SLM Electronics, Attn: R&D Compliance Engineer
1901 Congressional Drive, St Louis, Missouri, 63146 • Tel.: 314-569-0141, Fax: 314-569-0175
©2004 SLM ELECTRONICS, A DIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON, ST. LOUIS, MO. U.S.A. 63133
P/N 47-385-02 • 102504
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