model cx-260 model bh-260

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Amp 260 CX-260 and 260 BH-260 Bass Amplifier Owner's Manual | Manualzz
Amp
AMPLIFIED
MUSIC
PRODUCTS
MODEL CX-260
260 WATT BASS COMBO
Thisincredibly unique and extremely practical combo amp
solvestwo major problems fortoday's bass stylist,performance
and portability.
As shown set-up here, the connected air space of the
CX-260 (double telescoping cabinets) provides an internal air
volume of four cu. ft. for those all important low notes ...
Yet ... the lower cabinet slipsover the upper and locks in place
with two thumb screws for amazing back seat portability.
To complete the package, the 15" premium speaker is
driven by our exciting new 260 watt head (See Model
BH-260 for complete description).
This big performance combo system packs down to a very
portable package that measures 23% x 21 x 13%", weighs
64 pounds and is switchable for line voltages anywhere
in the world.
MODEL BH-260
260 WATT BASS HEAD
Easily the best value on today's market.
Compare the features, specs and price of this great sounding, clean and powerful amplifier to
any other and you will agree.
Included on the front panel is an enhance switch which emphasizes low bass and upper end
brightness while reducing mid bass muddiness, an EQ section that includes bass and treble
controls plus three (3) bands of tuneable semi-parametric equalization and AMP's unique tone
balance control for quick, single knob adjustment to changing room acoustics.
On the back there are two recording outputs, pre EQ balanced direct and post EQ line level,
effects loop (pre EQ),low and high biamp outputs with 330 Hz crossover built-in, headphone jack
power amp input and two speaker jacks. Line output and power amp input can be used as a
second effects loop (post EQ).
Put this all together in a beautifully compact little package that measures 17" x 4" x 9.5", weighs
16 pounds, is switchable for line voltages anywhere in the world, and your search is over.
--
I
•
SERIES 260
FEATURES
Front Panel Includes: High and Low gain input jacks, Volume control, Flat/Enhance
switch and Footswitch Jack, Bassand Treble controls, 3-Band Semi-Parametric
Equalizer, Tone Balance, Power switch and LEDindicator.
Back Panel Includes: Two Recording outputs- Pre EQ Balanced Direct and Post EQ
Line output, Effects Loop with Send and Return jacks, High and Low Biamp
outputs, Power Amp input, Headphone jack, Two Speaker Output jacks, Power
Cord receptacle and Fuseholder. Delayed turn-On and rapid turn-Off prevent
power up transients.
RearAccess Panel: LineVoltage Selector Switches for 100V,120V,220V,240V- SO/60Hz.
Cabinet (CX-260): 4 cu. tt, Double Telescoping with 15" speaker.
SPECIFICATIONS
Power Output
Distortion
Frequency Response
Input Sensitivity
Input Impedance
Equivalent Input Noise
Maximum Input Voltage
High Gain Input
Low Gain Input
Effects Loop Level
Recording Outputs
Balanced Direct
Line Output
Biamp Outputs
Bass & Treble Controls
Tone Balance
Equalizer (3 Band)
Level Controls
Tunable Ranges
Electronic Crossover
AC Power (Swltchable)
Dimensions
(Width x Height x Depth)
BH-260 { Net Weight
Shipping Weight
Loudspeaker
Dimensions
CX-260
(Widfh x Height x Depth)
{ Net Weight
Shipping Weight
,
I
Amp
AMPLIFIED
MUSIC
PRODUCTS
260 Watts @ 4 Ohms, 160 Watts @ 8 Ohms
.08% THD
30 Hz to 15 KHz(-3dB)
35 mV for Rated Output
4.7 Megohms Shunted by 200 PF
2.75 Microvolts
4.8 Volts PP
15 Volts PP
.15 Volt Nominal, 26 VPPClean
(Pre EQ) .35 Volt Nominal, 10 VPPClean
(Post EQ) 1 Volt Nominal, 9 VPP Clean
1 Volf Nominal, 9 VPP Clean
15 dB Cut and Boost, 0 Center Click
10 dB Cut and Boost, 0 Center Click
15 dB Cut and Boost
40-120 Hz. 120-400 Hz.400-1200 Hz
330 Hz
100V, 120V, 220V, 240V, - SO/60Hz
1T' x 4" x 9.5" (+ knobs, handle, feet)
(432 x 102 x 241 millimeters)
16 Pounds (7.3 Kilograms)
21 Pounds (9.5 Kilograms)
Premium 15", 8 ohm
20.75" x 23" x 13"
.(527 x 584 x 330 millimeters)
. 65 Pounds (29.5 Kilograms)
72 Pounds (32.7 Kilograms)
AMPLIFIED MUSIC PRODUCTS CORP.
9829 Independence Avenue, Chatsworth, CA 91311
(818) 7090518
OWN
E R
MODEL BH-260
MODEL CX-260
AN EXCELLENT
' S
MAN
U A L
BASS AMPLIFIER
HEAD
BASS COMBO AMPLIFIER
CHOICE
Your selection
of the Amplified
Music Products
Corp. model 260
Bass Amplifier
is indeed an excellent
choice.
The features,
performance,
reliability,
and high power output of the model 260
make it a great choice for today's
bass player who wants the
best.
With a power rating of 260 watts, the model 260 is one
of the most powerful
amplifiers
available
in today's market.
Multiple
recording
outputs,
three bands of semiparametric
EQ,
wide range bass and treble controls,
built in biamp crrossover,
and tone balance along with a sophisticated
ultra low noise input
stage, make the model 260 ideal for professionsl
use either on
stage live or in the recording
studio.
Your satisfaction
in
choosing
the model 260 from AMP is sure to grow as the years go by.
We're proud you chose the AMP 260 to get the sound you want.
FRONT
PANEL
FEATURES
INPUT
JACKS
Input jack 1 should normally
be used. It provides
10 dB more
gain than input jack 2.
Input 2 should be used only for
signals
greater
than 4.8 volts peak to peak.
Such large signals
could occur when using a high level line output signal from
other equipment,
when using a special
effect box between
your
instrument
and the 220 (better to use the effects
loop), or
when using an instrument
with built-in
active electronics.
For most signals
input jack 1 will give higher gain and better
signal to noise ratio.
The two inputs cannot be used at the
same time.
Multiple
signals must first be mixed or added
externally
and then plugged
into either input jack.
/
VOLUME
CONTROL
This continuously
variable
control
adjusts
the loudness
or
volume of the 260 amplifier.
It controls
the output level
at all back panel output jacks except for the effects
loop
and balanced
direct XLR jack.
ENHANCE
BUTTON
When the enhance
button is pushed in, an enhanced
frequency
response
occurs with boost and cut of various
frequencies
chosen to complement
the sound of most bass instruments.
The result usually
gives a sweeter more transparent
sound
with less mid-bass
muddiness.
A footswitch
can be used to
control
the enhance
feature
by putting
the enhance
switch
in the off position
and using the footswitch
jack.
BASS
CONTROL
The bass control
allows a wide range of adjustment
for the
loudness
of bass frequencies.
Continuous
variation
up to
15 dB boost or cut is available.
Flat response
occurs at
the central
position
of the control,
identified
by a slight
click.
TREBLE
CONTROL
The treble control
allows a wide range of adjustment
for the
loudness
of treble frequencies.
Continuous
variation
up to
15 dB boost or cut is available.
Flat response
occurs at
the central
position
of the control,
identified
by a slight
click.
SEMI PARAMETRIC
BASS EQUALIZER
Musicians
and recording
engineers
have been using tone controls
and equalizers
for years to adjust the sound to their liking
or to compensate
for room acoustics.
The following
description
will help you to understand
how the semi parametric
bass
equalizer
works and to reach your sound goal more quickly.
The semi parametric
bass equalizer
consists
of three individual
sections
with two controls
per section.
For each section
the upper control
selects
the particular
frequency
that
will be affected
by the setting
of the level control
located
directly
beneath
it.
Turning
the level control
counter-clockwise
will cut the response
in the area
set by the frequency
control
just above it.
Turning
the level
control
clockwise
will boost the response
in the area set
by the frequency
control.
Flat response
occurs at
the central
position
of each level control,
identified
by
a slight click.
When the level control
is in the central
or flat position
the frequency
control
will have no effect
since no boost or cut is occuring.
The chart below will help you to identify
which controls
will
affect the various
notes on the neck of your bass instrument.
70
FREQ
6°080 110
50
40
LEVEL
210
700
18°0250
150
120
380
120
400
60~O 800
500
1100
400
1200
0
0
0
-150+15
-150+15
-150+15
-- E82- ----
D73-
-- A110 ----
G98- ----
F87- E82-
-- D147 ----
C131 B123
----
-- G196 ----
F17S E16S ----
----
C6S-
B62- -------
ASS-
----
G49-
----
F44-
-E41
D73-
----
C6S-
B62-
----
-ASS
A110 ----
G98- ----
F87- E82- ----
-D73
D147
C131 B123
----
A110 ----
-G98
----
TONE
BALANCE
T"urning the tone balance
control
counter-clockwise
from its
mid position
will boost the low frequencies
while cutting
the
high frequencies.
Turning
the tone balance
clockwise
will
boost the high frequencies
while cutting
the low frequencies.
With both boost and cut occuring
together
the psychological
loudness
appears nearly constant
while tone balance
shifts
radically.
Flat response
occurs in the center click position.
Because
the tone balance
control
is totally
independent
of
the other tone functions,
it allows the musician
to achieve
accentuated
bass and treble effects.
As a result,
really
new and exciting
tonal combinations
are possible.
There are
two cases in which this control
is especially
useful.
First,
if a particular
arrangement
or song requires
more lows or
highs, they can be achieved
swiftly
by moving the tone balance
one direction
or the other.
Secondly
you can quickly
compensate
for different
room acoustics
you may encounter
without
having to disturb
your favorite
setting
of the semi
parametric
equalizer
tone section.
POWER
SWITCH
AND
INDICATOR
LIGHT
The power on-off switch has a 2 second delayed
turn-on
to
prevent
undesired
transients
from getting
to the loudspeaker.
The power on indicator
is a green LED light indicating
when
the model 260 is plugged
in, turned on, and ready for use.
BACK
PANEL
FEATURES
RECORDING
OUTPUTS
The balanced
direct XLR output operates
PRE-EQ and is ideal
for sending
a low noise, low distortion,
unmodified
sample of
your instrument
signal directly
to a mixing board.
The
voltage
level of the signal will be twice the input from your
instrument
when using input jack number 2, and 10 dB larger
when using input jack number 1.
The output is plus phase
at pin 2 and minus phase at pin 3. The output impedance
at
each of these pins is 2.2K ohms or 4.4K total.
Pin 1 is grounded.
None of the front panel controls
affect the balanced
direct output.
The line output is POST-EQ
and is therefore
affected
by all
of the front panel controls.
The line output can be used
to send a replica
of the fully modified
amplifier
output
including
anything
in the effects
loop to a recording
board
or house P.A. board.
Just remember
that any changes
to
your control
settings
will affect this output.
The phase of
this output is positive
with respect
to the input signal.
EFFECTS
LOOP
The effects
loop is used to send signals
to and from any
desired
special
effect box or group of boxes.
Placing
the
effects
in the effects
loop usually
provides
better results
than placing
them between
the instrument
and the amplifier
input.
The 260 input stage provides
just enough gain to
reduce any noise that the effects
device might otherwise
introduce.
The effects
loop source impedance
of 1K ohms and
input impedance
of 10K ohms minimum
are ideally
suited for
use with virtually
all popular
effects
now on the market.
To connect
the loop, place a shielded
cable from the effects
send jack to the input of the device and a second shielded
cable from the device output to the effects
return jack.
BIAMP
OUTPUTS
Low freq and high freq output jacks are provided
for use in
biamp setups.
All frequencies
below the crossover
frequency
come from the low freq jack, and all frequencies
above the
crossover
frequency
come from the high freq jack.
The most
common hookup would be to place a shielded
cable from the
low freq jack to the PWR. AMP. INPUT jack, thus using the
260 with its 260 watts of power to drive your low frequency
speaker
cabinet.
A second shielded
cable from the high freq
jack is then used to feed the input of a seperate
power amplifier
which drives the high frequency
speaker.
POWER
AMPLIFIER
INPUT
The PWR. AMP. INPUT jack is used to insert a signal directly
into the power amplifier
section
of the model 260.
Plugging
a signal into the power amp input jack automatically
disconnects
the normal internal
connection
of the 260 preamp
output from the power amp input.
HEADPHONES
The headphone
jack allows use of headphones
for quiet practice
or pr~show warmup.
The headphones
used must have a stereo
type 1/4 inch phone plug to prevent
shorting
out one side of
the headphone
output which then re~oves
the other side as well.
No harm will be done with the wrong plug, you just don't get
the signal.
SPEAKER
OUTPUTS
1 AND
2
Speaker
output jacks 1 and 2 are the power amplifier
output
jacks.
Either one can be used to drive your speaker.
Both
can be used when driving
two cabinets.
The output will
drive 160 watts into an 8 ohm speaker
or 260 watts into a
4 ohm load.
Two 8 ohm cabinets
plugged
into jacks 1 and 2
combine
to make one 4 ohm load.
The model 260 will not be hurt
by directly
shorting
its output even while supplying
maximum
output to its load.
However
continuous
operation
in this
manner or continuous
high level operation
into speaker
loads
of less than 4 ohms can cause overheating
and eventual
damage.
Under normal use the bottom chassis
area may become quite hot.
This is normal
since the entire chassis
is used as a heat sink.
OPERATING
AT
100,' 120,220,
AND
240
VOLTS
50/60
Hz
The model 260 can be reset to operate
at 100, 120, 220, or 240
volts to match the line voltages
found throughout
the world.
Any qualified
technician
can remove the small rear switch
cover and select the two switch settings
that add up to the
desired
operating
voltage.
Be sure this is done with the
power cord removed
from the wall outlet and the power off.
CX-260
SPEAKER
SYSTEM
The CX-260 Combo Bass Amplifier
includes
the series 260 bass
amplifier
chassis,
integral
15 inch speaker
cabinet,
and
dual purpose
travel case bass extension
shell.
When traveling
the combo amp is enclosed
in the extension
case and measures
only 23.75 x 20.75 x 13.125.
For stage use the two thumb
screws securing
the extension
case are removed,
the case
lifted straight
up and off, and the combo unit placed on top
of the case using the four feet to properly
nest the two boxes
together.
The large enclosed
air space of the two combined
boxes resonates
with the bass reflex port opening
to produce
excellent
bass response
from a truly portable
cabinet.
To prevent
loss of the two thumb screws,
it's a good idea
to screw them into the upper combo cabinet
while playing.
Since the bottom of the CX-260 remains
open when ready for
travel,
be careful
to avoid getting
foreign
objects
or
moisture
in the bottom opening.
When preparing
the CX-260
for travel be sure to place the open port of the extension
travel case toward the back of the speaker
cabinet.
This
will assure that no foreign
objects
can poke into the grille
cloth area of the speaker
cabinet.
LIMITED
WARRANTY
All products
from AMP are warranted
to the original
consumer purchaser
for ONE YEAR from the date of purchase
in
the U.S.A. against
defects
in materials
and workmanship.
This warranty
is VOID if the unit has been damaged
due to
accident;
improper
handling,
installation,
or operation;
shipping
damage;
abuse; misuse;
unauthorized
repair or
attempted
repair or if the serial number has been defaced
or removed.
AMP reserves
the right to make such determination on the bassis of factory
inspection.
All liability
for any incidental
or consequential
for breach of any expressed
or implied
warranties
claimed
and excluded
herefrom.
damages
is dis-
Some states do not allow limitations
on how long an implied warranty
lasts, or the exclusion
or limitation
of
incidental
or consequential
damages,
so that the above
limitation
or exclusion
may not apply to you.
This warranty gives you specific
legal rights and you may also
have other rights which vary from state to state.
To
get
your
AMP
product
repaired:
1.
Locate your original
bill of sale showing
details of purchase
including
date of purchase.
2.
Telephone
or write us at the location
shown below with a brief description
of the problem
and
we will issue you a return authorization
number
(R. A. i).
3.
Pack the unit carefully,
include
your bill of
sale or copy thereof,
indicate
the R. A. # on
the outside
of the shipping
carton and ship it
PREPAID
to the address
shown below.
NOTE:
You
are responsible
for freight
and insurance
charges to and from the factory.
4.
AMP will provide
free repair
(parts and labor),
or replacement
at our option,
on units determined to be under warranty.
We will return the repaired unit to you freight
COLLECT.
AMPLIFIED
MUSIC PRODUCTS
9829 Independence
Ave.
Chatsworth,
CA.
91311
Phone
(818)
709-0518
CORP.
R. A. #

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Key Features

  • 260 Watt Output
  • Three Band Semi-Parametric EQ
  • Tone Balance Control
  • Built-in Crossover
  • Multiple Recording Outputs
  • Enhance Switch
  • Dual Telescoping Cabinet
  • Portable Design

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Frequently Answers and Questions

What is the power output of the 260 BH-260?
The 260 BH-260 has a power output of 260 Watts @ 4 Ohms, 160 Watts @ 8 Ohms.
What is the frequency response of the 260 BH-260?
The 260 BH-260 has a frequency response of 30 Hz to 15 KHz (-3 dB).
What is the purpose of the Enhance switch on the 260 BH-260?
The Enhance switch emphasizes low bass and upper end brightness while reducing mid bass muddiness.
What is the purpose of the Tone Balance control on the 260 BH-260?
The Tone Balance control allows for quick, single knob adjustment to changing room acoustics.
How do I connect the 260 CX-260 combo amp for stage use?
When using the 260 CX-260 for stage use, remove the two thumb screws securing the extension case, lift the case straight up and off, and place the combo unit on top of the case using the four feet to properly nest the two boxes together.
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