Crate Amplifiers BXH-220 Musical Instrument Amplifier User Manual

Owner’s Manual
for the
BXH-220
BASS AMPLIFIER
INPUT
INPUT
GAIN
MASTER
EQUALIZATION
INCREASE
GAIN
CONTOUR
LEVEL
LINE OUT
LEVEL
OK
DECREASE
GAIN
–15dB
ON
40
100
225
625
1.6k
4k
8k
16k
LIMIT
POST EQ
PRE EQ
EFFECTS HEADPHONES
BLEND
LEVEL
POWER
BXH-220 BASS AMPLIFIER
Congratulations!
You are now the proud owner of the innovative Crate BXH-220 Bass amplifier. This feature-packed powerhouse offers you solid state reliability with classic Crate performance and high cosmetic appeal.
Like all Crate products, your BXH-220 Bass amp is Musician Made in the U.S.A., using only the best components. Extensive testing at many stages in its production, including a final “audition” by a skilled musician,
insures you that your BXH-220 Bass amp is the best it can be.
In order to get the best possible performance, please read this manual before you use the amplifier.
.
And thank you for choosing
Contents:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . .3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
The Front Panel . . . . . . . . . . . . . . . . . . . . . .4
The Rear Panel . . . . . . . . . . . . . . . . . . . . . .5
Some Suggested Settings . . . . . . . . . . . . . . .6
System Block Diagram . . . . . . . . . . . . . . . . .7
Technical Specifications . . . . . . . . . .back cover
CAUTION
ATTENTION
VORSICHT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE D'ELECTROCUTION
NE PAS OUVRIR
ELEKTRISCHE SCHLAGGEFAHR
NICHT OFFENEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER.
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
ATTENTION: POUR REDUIRE D'ELECTROCUTION NE PAS
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE N'EST REPRABLE
PAR L'UTILISATEUR. POUR TOUTE REPARATION, S'ADRESSER A UN
TECHNICIEN QUALIFIE.
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM
WARTUNGSPERSONAL ZU UBERLASSEN.
THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION. IN ORDER TO PROLONG THE LIFE OF
THE UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY, PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES:
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT OPEN CHASSIS; DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER
CORD; CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
CAUTION: NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
CAUTION: IF YOU USE AUDIO AMPLIFIERS PROFESSIONALLY OR IN WORK RELATED SITUATIONS AS AN EMPLOYEE, THE OCCUPATIONAL SAFETY
AND HEALTH ADMINISTRATION (OSHA) HAS SPECIFIED REGULATIONS CONCERNING PROLONGED EXPOSURE TO HIGH SOUND PRESSURE LEVELS. PLEASE REFER TO THE CODE OF FEDERAL REGULATIONS DOCUMENT 29CFR1910 FOR ADDITIONAL INFORMATION.
EXPLANATION OF
GRAPHICAL SYMBOLS:
2
"DANGEROUS VOLTAGE"
= "DANGER HAUTE TENSION"
"GEFAHLICHE SPANNUNG"
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
= "REFERREZ-VOUS AU MANUAL D'UTILISATION"
"UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN"
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 electronics 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
BXH-220 BASS AMPLIFIER
The Front Panel:
1
2
4
5
7
INPUT
INPUT
GAIN
8
10
13
15
MASTER
EQUALIZATION
INCREASE
GAIN
12
CONTOUR
LEVEL
LINE OUT
LEVEL
EFFECTS HEADPHONES
BLEND
LEVEL
POWER
OK
DECREASE
GAIN
–15dB
ON
3
6
40
1. INPUT: Connect your bass to the
amplifier here.
2. GAIN: Use this control to properly
match the output of your bass to the
amplifier. With the amp’s Master level
control at “0”, begin playing your bass as
you normally would. Watch the adjacent
LEDs (#4) as you turn up the Gain control: the proper setting for the Gain control is the one where the “OK” LED lights
most often while playing. If the
“Decrease Gain” LED stays lit even with
the Gain control turned down low, press
in the -15dB button (#3) and continue
adjusting the Gain control until the proper setting is obtained.
3. -15dB: If your bass has active electronics or “hot” pickups, its output signal
may need to be padded to get the best
signal to noise setting from the Gain control. If the “Decrease Gain” LED stays lit
with the Gain control turned down low,
press in the -15dB button.
4. LEDs: These three LEDs are your
guide to properly setting the Gain control. Follow the steps given for the Gain
control (#2) until the “OK” LED lights
most often while you play.
5. CONTOUR: This control allows you
to make additional changes to your tone
and is active only when the Contour
On/Off switch (#6) is pressed in. As the
“wave” icons indicate you can enhance
both the lows and highs at the same
time, or add mid punch.
4
100
225
625
1.6k
4k
8k
16k
LIMIT
9
POST EQ
PRE EQ
11
6. CONTOUR ON/OFF:
Use this
switch to engage the contour circuitry.
With the switch pressed in, the Contour
control (#5) is active.
7. EQUALIZATION: This eight-band
graphic equalizer allows you to custom
tailor your tone. Each slider controls the
frequency indicated directly below it and
offers a cut or boost of 10dB at various
frequencies from 40Hz to 16kHz
8. MASTER LEVEL: Use this control
to set the output level of the amplifier.
This controls the signal level at the
Speaker Output jacks (#19), as well as
the Preamp Out jack (#17).
9. LIMIT: The amplifier employs
Crate’s APM
Automatic Power
Maximizer protection circuitry to keep
the output distortion-free even at high
volume levels. Whenever the output
nears its clipping point, the limit circuit
kicks in to keep the output clean. The
Limit LED lights up when the APM limiter circuit is activated. Occasional flashing of the LED is normal. Very frequent
flashing or constant illumination indicates
the output level is too high; reduce the
Master level control and/or your instrument’s output until the LED flashes less.
10. LINE OUT LEVEL: This controls
the level of the signal at the Balanced
Line Out jack (#20). You may also use
this output (or the headphone jack, #14)
to run a signal to a tuner.
14
11. POST/PRE : This switch selects the
tap point for the signal at the Balanced
Line Out jack. With the switch out, the
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”).
12. EFFECTS BLEND: This control
proportions the amount of effect added
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.)
13. HEADPHONES LEVEL: This control adjusts the signal level at the
Headphones jack (#14).
14. HEADPHONES: Plug a pair of
stereo headphones in here for private listening. The signal at this jack is post Gain
and post EQ. The level of the signal here
is determined by the setting of the
Headphones Level control (#13). Using
headphones does not disable the
speaker outputs. You may also use this
output (or the line out jack, #20) to run
a signal to a tuner.
15. POWER: This two-position switch
turns the amp on and off, “on” being the
UP position. The switch lights up when
the amp is turned on.
BXH-220 BASS AMPLIFIER
The Rear Panel:
16
17 18
PREAMP
OUT
EFFECTS
LOOP
PWR AMP
IN
RETURN
SEND
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
AVIS:
22
21
RISQUE DE CHOC
ELECTRIQUE. NE PAS OUVRIR.
WARNING: TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO
NOT EXPOSE THIS EQUIPMENT TO
RAIN OR MOISTURE.
MODEL: BXH-220
SERIAL: BXH22031U2
LINE: 120 V ~ 60
WATTS:
MAX
S
P
E
A
K
E
R
S
Hz
MADE IN THE U.S.A.
BY SLM ELECTRONICS
1400 FERGUSON AVE.
ST. LOUIS, MO 63133
150W @ 8 OHMS
220W @ 4 OHMS
MIN. LOAD
BALANCED
LINE OUT
19
16. POWER CORD: Connect the male
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 outside of the United States, see the area’s
Crate dealer for the proper power cord
or consult a local professional electrician.
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.
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 example). Connection to this jack interrupts
the signal from the internal preamp to
the power amp. The Preamp Out (#17)
signal is not interrupted.
19. SPEAKERS: Use these jacks to connect 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 combinations resulting in impedance loads below
4 ohms. Use the chart below to help
determine parallel loads. If in doubt, ask
your dealer.
Cab Imp.
8 ohms
16 ohms
16 ohms
# Cabs
2
2
4
Total Imp.
4 ohms
8 ohms
4 ohms
20
20. BALANCED LINE OUT: Use this
3-pin XLR jack to send a line level signal
to the house sound board or mixing console. 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).
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.
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
BXH-220 BASS AMPLIFIER
Some Suggested Settings:
Rock:
AS NEEDED
OUT
AS NEEDED
IN
AS NEEDED
IN
AS NEEDED
IN
Jazz:
Country:
Funk:
6
BXH-220 BASS AMPLIFIER
System Block Diagram:
INPUT
CONTOUR
8 BAND
GRAPHIC
EFFECTS
SEND
GAIN
-15dB PAD
PEAK
LED
ON / OFF
EFFECTS
BLEND
EFFECTS
RETURN
MASTER
POST
BALANCED
LINE OUT
PRE
LINE OUT
LEVEL
PREAMP
OUT
POWER
AMP IN
POWER
AMP
SPEAKER
OUT
LIMIT
LED
SPEAKER
OUT
HEADPHONES
HEADPHONE
LEVEL
7
BXH-220 BASS AMPLIFIER
Technical Specifications:
Maximum Input Signal Level Accepted
17 volts peak to peak (-15dB switch pressed in)
Input Impedance
500k ohms (-15dB switch out), 75k ohms (-15dB switch in)
Signal to Noise Ratio
75dB typical
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
67dB with EQ flat, Contour off
EQ Section
20dB range (±10dB) @ 40Hz, 100Hz, 225Hz, 625Hz, 1.6kHz,
4kHz, 8kHz and 16kHz
Input Power Requirements
120VAC, 60Hz, 250VA
100/120VAC, 50/60Hz, 250VA
230VAC, 50/60Hz, 250VA
Size and Weight
7-1/4”H x 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