Owner’s Manual
for the
BXH-220
BASS AMPLIFIER
INPUT
GAIN
EQUALIZATION
MASTER
LINE OUT
LEVEL
EFFECTS HEADPHONES
BLEND LEVEL
INPUT
CONTOUR
LEVEL
POWER
INCREASE
GAIN
OK
DECREASE
GAIN
–15dB
ON
40
100
225
625
1.6k
4k
8k
16k
LIMIT
POST EQ
PRE EQ
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BXH-220 BASS AMPLIFIER
Introduction:
Crate’s new BXH-220 Bass amplifier is a feature-packed, professional-strength powerhouse which can
deliver incredible bass sounds. Rugged construction, reliable American craftsmanship and solid state elec-
tronics add up to create one very roadworthy, stage-ready piece of gear.
The BXH-220 packs solid performance into a compact head unit, contained in a rugged Tolex® covered
cabinet. Its side-mounted handle and heavy-duty rubber feet on two sides (not just the bottom, but also on
the end you set it down on in real life) increase its value to those musicians who are always “on the go.” The
amplifier will deliver 220 watts into 4 ohms, or 150 watts into 8 ohms. A listing of the features of the amp is
given below.
Features:
Additional information can be found on the pages indicated.
• Solid state circuitry for reliable service and incredible tones.
• Crate’s APM (Automatic Power Maximizer) limiter circuit for the most output without distortion.
• Variable input gain control with -15dB pad switch and 3 input icon LEDs for the best match between
your bass and the amplifier (page 4).
• Switchable contour control (page 4).
• 8-band graphic equalizer for optimum tone control (page 4).
• Balanced line out with adjustable level control and “pre/post” switch (pages 4 and 5).
• Headphone jack with adjustable level control for private practice sessions (page 4).
• Effects loop for noiseless use of your favorite processors and effects (page 5).
• Musician made in the U.S.A.
• Crate’s exclusive 5-year warranty (U.S. only - see your dealer in other areas for warranty information)
3
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BXH-220 BASS AMPLIFIER
The Front Panel:
1
2
4
5
7
8
10
12
13
15
INPUT
GAIN
EQUALIZATION
MASTER
LINE OUT
LEVEL
EFFECTS HEADPHONES
INPUT
CONTOUR
LEVEL
BLEND
LEVEL
POWER
INCREASE
GAIN
OK
DECREASE
GAIN
–15dB
ON
40
100
225
625
1.6k
4k
8k
16k
LIMIT
POST EQ
PRE EQ
3
6
9
11
14
1. INPUT: Connect your bass to the 6. CONTOUR ON/OFF:
Use this 11. POST/PRE : This switch selects the
amplifier here.
switch to engage the contour circuitry. tap point for the signal at the Balanced
With the switch pressed in, the Contour Line Out jack. With the switch out, the
2. GAIN: Use this control to properly
match the output of your bass to the
amplifier. With the amp’s Master level 7. EQUALIZATION: This eight-band
control at “0”, begin playing your bass as graphic equalizer allows you to custom
you normally would. Watch the adjacent tailor your tone. Each slider controls the
control (#5) is active.
signal is tapped before the eq, contour
and effects loop (“pre”). With the switch
pressed in, the signal is tapped after the
eq, contour and effects loop (“post”).
LEDs (#4) as you turn up the Gain con- frequency indicated directly below it and 12. EFFECTS BLEND: This control
trol: the proper setting for the Gain con- offers a cut or boost of 10dB at various proportions the amount of effect added
trol is the one where the “OK” LED lights frequencies from 40Hz to 16kHz
most often while playing. If the
to the signal going to the power amp
stage. At the “0” position the signal is
“dry” (no effect added); as you bring the
control towards “10” the amount of
effect applied increases. (“5” is a 50/50
blend of dry signal and effects.)
8. MASTER LEVEL: Use this control
“Decrease Gain” LED stays lit even with
to set the output level of the amplifier.
the Gain control turned down low, press
This controls the signal level at the
in the -15dB button (#3) and continue
Speaker Output jacks (#19), as well as
adjusting the Gain control until the prop-
the Preamp Out jack (#17).
er setting is obtained.
13. HEADPHONES LEVEL: This con-
trol adjusts the signal level at the
Headphones jack (#14).
9. LIMIT: The amplifier employs
3. -15dB: If your bass has active elec-
Crate’s APM
Maximizer protection circuitry to keep
Automatic Power
tronics or “hot” pickups, its output signal
may need to be padded to get the best
signal to noise setting from the Gain con-
trol. If the “Decrease Gain” LED stays lit
with the Gain control turned down low,
press in the -15dB button.
the output distortion-free even at high 14. HEADPHONES: Plug a pair of
volume levels. Whenever the output stereo headphones in here for private lis-
nears its clipping point, the limit circuit tening. The signal at this jack is post Gain
kicks in to keep the output clean. The and post EQ. The level of the signal here
Limit LED lights up when the APM lim- is determined by the setting of the
4. LEDs: These three LEDs are your iter circuit is activated. Occasional flash- Headphones Level control (#13). Using
guide to properly setting the Gain con- ing of the LED is normal. Very frequent headphones does not disable the
trol. Follow the steps given for the Gain flashing or constant illumination indicates speaker outputs. You may also use this
control (#2) until the “OK” LED lights the output level is too high; reduce the output (or the line out jack, #20) to run
most often while you play.
Master level control and/or your instru- a signal to a tuner.
ment’s output until the LED flashes less.
5. CONTOUR: This control allows you
15. POWER: This two-position switch
to make additional changes to your tone 10. LINE OUT LEVEL: This controls turns the amp on and off, “on” being the
and is active only when the Contour the level of the signal at the Balanced UP position. The switch lights up when
On/Off switch (#6) is pressed in. As the Line Out jack (#20). You may also use the amp is turned on.
“wave” icons indicate you can enhance this output (or the headphone jack, #14)
both the lows and highs at the same to run a signal to a tuner.
time, or add mid punch.
4
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BXH-220 BASS AMPLIFIER
The Rear Panel:
16
17 18
PREAMP
OUT
EFFECTS
LOOP
PWR AMP
IN
RETURN
22
21
SEND
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
RISQUE DE CHOC
ELECTRIQUE. NE PAS OUVRIR.
WARNING: TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO
NOT EXPOSE THIS EQUIPMENT TO
RAIN OR MOISTURE.
S
P
E
A
K
E
R
S
MODEL: BXH-220
SERIAL: BXH22031U2
LINE: 120 V ~ 60
150W @ 8 OHMS
220W @ 4 OHMS
MIN. LOAD
Hz
WATTS:
MAX
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
ST. LOUIS, MO 63133
BALANCED
LINE OUT
19
20
16. POWER CORD: Connect the male 19. SPEAKERS: Use these jacks to con- 20. BALANCED LINE OUT: Use this
end of this cord to a properly grounded
AC power outlet. Use only a grounded
outlet! DO NOT defeat the ground pin
of the cord! If the amplifier is used out-
side of the United States, see the area’s
Crate dealer for the proper power cord
or consult a local professional electrician.
3-pin XLR jack to send a line level signal
to the house sound board or mixing con-
sole. The level of the signal at this jack is
determined by the setting of the Line
Out Level control on the front panel
(#10). This signal is switchable to be
either pre or post EQ through the front
panel Pre/Post switch(#11).
nect the amp to your speaker cabinet(s).
Use heavy-duty speaker cables with
mono 1/4” plugs. These jacks are wired
in parallel. Don’t use cabinet combina-
tions resulting in impedance loads below
4 ohms. Use the chart below to help
determine parallel loads. If in doubt, ask
your dealer.
17. PREAMP OUT: A pre-amplified
line-level signal may be tapped from this
jack for sending to an external amplifier,
powered monitor, recording console,
mixing board or effects processor. This is
an unbalanced, mono 1/4” jack.
21. EFFECTS LOOP SEND: This
unbalanced jack lets you send a signal
out to an external effects processor or
tuner. The signal at this jack is post-EQ,
pre-Master. Connect this to the input
jack of the processor or tuner.
Cab Imp.
8 ohms
# Cabs
Total Imp.
4 ohms
8 ohms
4 ohms
2
2
4
16 ohms
16 ohms
18. POWER AMP IN: A pre-amplified
line level signal may be sent directly into
the bass amp’s power amp (as when
slaving two amplifiers together, for exam-
ple). Connection to this jack interrupts
the signal from the internal preamp to
the power amp. The Preamp Out (#17)
signal is not interrupted.
22. EFFECTS LOOP RETURN: This
jack receives the signal from the output
jack of an external effects processor. Use
shielded cables with mono 1/4” plugs for
connecting the Effects Loop.
5
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BXH-220 BASS AMPLIFIER
Some Suggested Settings:
Rock:
AS NEEDED
AS NEEDED
AS NEEDED
AS NEEDED
OUT
Jazz:
IN
Country:
IN
Funk:
IN
6
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BXH-220 BASS AMPLIFIER
System Block Diagram:
INPUT
8 BAND
CONTOUR
EFFECTS
SEND
GRAPHIC
GAIN
-15dB PAD
ON / OFF
PEAK
LED
EFFECTS
BLEND
EFFECTS
RETURN
MASTER
POST
PRE
BALANCED
LINE OUT
LINE OUT
LEVEL
PREAMP
OUT
POWER
AMP IN
POWER
AMP
SPEAKER
OUT
LIMIT
LED
SPEAKER
OUT
HEAD-
PHONES
HEADPHONE
LEVEL
7
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BXH-220 BASS AMPLIFIER
Technical Specifications:
Maximum Input Signal Level Accepted
Input Impedance
17 volts peak to peak (-15dB switch pressed in)
500k ohms (-15dB switch out), 75k ohms (-15dB switch in)
75dB typical
Signal to Noise Ratio
Output Power Rating
160 watts RMS @ < 5% THD w/8 ohm load, 120VAC line
220 watts RMS @ < 5% THD w/4 ohm load, 120VAC line
Gain @ 1kHz
EQ Section
67dB with EQ flat, Contour off
20dB range ( 10dB) @ 40Hz, 100Hz, 225Hz, 625Hz, 1.6kHz,
4kHz, 8kHz and 16kHz
Input Power Requirements
Size and Weight
120VAC, 60Hz, 250VA
100/120VAC, 50/60Hz, 250VA
230VAC, 50/60Hz, 250VA
7-1/4”Hx 21”W x 12-1/2”D, 35 lbs.
CRATE continually develops new products, as well as improves existing ones. For this reason,
specifications and information in this manual are subject to change without notice.
©1997 SLM ELECTRONICS • A DIVISION OF ST. LOUIS MUSIC, 1400 FERGUSON AVENUE, ST. LOUIS, MO 63133
47-589-51 • 07/97
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