Fender Series 3000 Owners Manual - Page 47

Using, Calculating, Series, Parallel, Impedances, Series, Series/Parallel, Connections

Get Fender Series 3000 PDF manuals and user guides View all Fender Series 3000 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 47 highlights

• • • Using a Pad o, 0 0 0 Sour= Umler wth add Outpu.L 00 tale Pad nputs Outputs Lop& Tapp Anorder wan - toes Input Leval Whenever possible, connect the output of a -20dB device to the input of another -20dB device (the same applies to -10dB devices and +4dB devices). If this isn't possible, and the source device has a higher output level than the load device, use a pad to attenuate the level of the source device. For example, if the source is a +4dB limiter and the load is the input to a -10dB tape machine, you need a 14dB pad to achieve level compatibility. Without the pad, you risk clipping distortion. Just turning down the output of the source device probably won't solve the problem, either. This may result in that other level compatibility problem, electronic hiss noise. (For pad information, see "Pads and Transformers" or refer to "Sound System Engineering" by Don and Carolyn Davis or to "The Audio Cyclopedia" by Howard M. Tremaine, both published by Howard W. Sams.) If the source device has a lower output level than the load device, you could place a line-level preamplifier between them to give you the required amount of gain. Or, you may wish to simply "give it a try." The worst that can happen here is additional hiss noise and it may be tolerable in many cases. Fortunately, your Fender 3000 Mixer is equipped with a variety of linelevel inputs and outputs. For example, the Eff Return jack and the Aux In jacks are planned for a -20dB device (many reverberation and other effects devices operate at this level). The Direct In jacks, and the Pre Amp Out/Power Amp In jacks, on the other hand, are planned for +4dB input levels and the Line Out/G-EQ In jacks are planned for -10dB levels. Thus, you would probably place a +4dB limiter in the Pre Amp Out/Power Amp In jacks but you would use the Line Out jacks to feed a semi-pro tape machine. By adjusting the Trim control, the Hi-Z inputs on your 3000 Mixer can be used for line-level devices (of any level up to +4dB) as well as Hi-Z microphones. Calculating Series and Parallel Impedances For the most part, the only thing we ever connect in series or in parallel in audio is loudspeakers. In rare cases, we may connect two microphones in parallel by using a "y-cable" but this may degrade the performance of the microphones (so don't do it unless you have to). Neither is it a good idea to connect microphones in series (the adapter cables are difficult to make anyway). Series, Parallel and Series/Parallel Connections Amplifier Sees a 1651 Load Fender 2851 Loudspeaker Systems 881 Fender 2851 Loudspeaker Systems 881 Power Amplifier Amplifier Sees a 411 Load 0 881 0 Two Loudspeaker Systems Connected in Series 811 Power Amplifier 0 [-Two Loudspeaker Systems Connected in Parallel Amplifier Sees an 818 Load Power Amplifier Four Loudspeaker Systems Connected in Series/Parallel 0 881 0 881 0 8S t O 881 45

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
•
•
•
Using
a
Pad
o,
0
0
0
Sour=
Umler
wth
add
Outpu.L
tale
Pad
00
nputs
Outputs
Lop&
Tapp
Anorder
wan
-
toes
Input
Leval
Whenever
possible,
connect
the
output
of
a
-20dB
device
to
the
input
of
another
-20dB
device
(the
same
applies
to
-10dB
devices
and
+4dB
devices).
If
this
isn't
possible,
and
the
source
device
has
a
higher
output
level
than
the
load
device,
use
a
pad
to
attenuate
the
level
of
the
source
device.
For
example,
if
the
source
is
a
+4dB
limiter
and
the
load
is
the
input
to
a
-10dB
tape
machine,
you
need
a
14dB
pad
to
achieve
level
compatibility.
Without
the
pad,
you
risk
cl
ipping
distortion.
Just
turning
down
the
output
of
the
source
device
probably
won't
solve
the
problem,
either.
This
may
result
in
that
other
level
compatibility
problem,
electronic
hiss
noise.
(For
pad
information,
see
"Pads
and
Transformers"
or
refer
to
"Sound
System
Engineering"
by
Don
and
Carolyn
Davis
or
to
"The
Audio
Cyclopedia"
by
Howard
M.
Tremaine,
both
published
by
Howard
W.
Sams.)
If
the
source
device
has
a
lower
output
level
than
the
load
device,
you
could
place
a
line
-level
preamplifier
between
them
to
give
you
the
required
amount
of
gain.
Or,
you
may
wish
to
simply
"give
it
a
try."
The
worst
that
can
happen
here
is
additional
hiss
noise
and
it
may
be
tolerable
in
many
cases.
Fortunately,
your
Fender
3000
Mixer
is
equipped
with
a
variety
of
line
-
level
inputs
and
outputs.
For
example,
the
Eff
Return
jack
and
the
Aux
In
jacks
are
planned
for
a
-20dB
device
(many
reverberation
and
other
effects
devices
operate
at
this
level).
The
Direct
In
jacks,
and
the
Pre
Amp
Out/Power
Amp
In
jacks,
on
the
other
hand,
are
planned
for
+4dB
input
levels
and
the
Line
Out/G-EQ
In
jacks
are
planned
for
-10dB
levels.
Thus,
you
would
probably
place
a
+4dB
limiter
in
the
Pre
Amp
Out/Power
Amp
In
jacks
but
you
would
use
the
Line
Out
jacks
to
feed
a
semi
-pro
tape
machine.
By
adjusting
the
Trim
control,
the
Hi
-Z
inputs
on
your
3000
Mixer
can
be
used
for
line
-level
devices
(of
any
level
up
to
+4dB)
as
well
as
Hi
-Z
microphones.
Calculating
Series
and
Parallel
Impedances
For
the
most
part,
the
only
thing
we
ever
connect
in
series
or
in
parallel
in
audio
is
loudspeakers.
In
rare
cases,
we
may
connect
two
microphones
in
parallel
by
using
a
"y
-cable"
but
this
may
degrade
the
performance
of
the
microphones
(so
don't
do
it
unless
you
have
to).
Neither
is
it
a
good
idea
to
connect
microphones
in
series
(the
adapter
cables
are
difficult
to
make
anyway).
Series,
Parallel
and
Series/Parallel
Connections
Fender
2851
Fender
2851
Loudspeaker
Systems
881
Loudspeaker
Systems
881
Amplifier
Sees
a
1651
Load
Power
Amplifier
Power
Amplifier
Power
Amplifier
0
Amplifier
Sees
a
411
Load
Amplifier
Sees
an
818
Load
881
0
0
881
0
Two
Loudspeaker
Systems
Connected
in
Series
811
[—
Two
Loudspeaker
Systems
Connected
in
Parallel
Four
Loudspeaker
Systems
Connected
in
Series/Parallel
0
881
0
8S
t
O
881
45