Input; Thru - Mackie M-800 Owner's Manual And Warranty Registration
Fr series fast recovery high-current power amplifier
Hide thumbs
Also See for M-800:
- Hook-up manual (4 pages) ,
- Brochure (8 pages) ,
- Service manual (22 pages)
Table of Contents
Advertisement
If you're using low imped-
ance loads at high power
levels, we recommend that
you use the binding post
speaker outputs rather
than the 1/4" TS jacks. Al-
though 1/4" jacks and plugs are convenient and
easy to use, they are not designed to handle
high-level currents.
Make sure that the amplifier is off before
making connections or reconfiguring the signal
routing.
INPUT
The M•800 gives you a choice of inputs — it
has XLR as well as 1/4" TRS (Tip-Ring-Sleeve)
input jacks. Sonically (and electrically) they're
identical, so choose either one. Since these two
inputs are in parallel, don't use both at the same
time.
The amplifier expects to see a nominal sig-
nal level anywhere between the –10 dBV
"semipro" and +4 dBu "pro" standards, mean-
ing almost any line-level mixer or other device
can be plugged into the amp's INPUTs. Use the
GAIN controls to adjust the gain of the ampli-
fier to match the signal level you're using.
Each type of input can be used with either
balanced or unbalanced signals.
Balanced
Use the balanced connections if your source
has balanced outputs. This will greatly reduce
any noise picked up in your system.
When connecting a balanced signal using
the XLR or 1/4" jacks, they're wired thusly, per
AES (Audio Engineering Society) standards:
XLR
Hot (+)
Pin 2
Cold (–)
Pin 3
Shield (Ground)
Pin 1
Balanced XLR Plug (prior to Lunar orbit insertion)
Balanced
Unbalanced
accommodated via the TRS jack. Make sure
the cord terminates with a TS plug (like a gui-
tar plug), or if it's a TRS plug (like a
headphone plug), make sure the ring is tied to
the shield, preferably at the source end.
Unbalanced 1/4" TS Plug
signal to the inputs of other amplifiers. In this
way, multiple amplifiers can receive an input
signal from your single mixer or preamp. This
is accomplished as follows:
off before making any connections.
first amp's INPUTs.
next amp's INPUT, and so on, daisy-chaining to
other amps in your system (assuming your
mixer has low impedance outputs).
TRS
Tip
Ring
Sleeve
2
SHIELD
output impedance of 100 ohms, then you can
HOT
daisy-chain up to twenty M•800 amplifiers,
which presents a load of 1000 ohms to the con-
3
1
COLD
sole (input impedance of 20 kohms divided by
SHIELD
1
20 amplifiers = 1000 ohms).
3
COLD
2
the input signals on to other devices such as a
HOT
DAT or cassette recorder. They are wired in
SHIELD
1
parallel with the XLR and TRS INPUTs, so the
3
COLD
2
signals coming out of the THRU jacks are ex-
HOT
actly the same as the signals going into the
amp, unaffected by any of the amp's switches
and controls.
RING
SLEEVE
TIP
1
⁄
" TRS Plug
4
Unbalanced TS (Tip-Sleeve) lines can be
SLEEVE
TIP
THRU
The THRU jacks allow you to feed the input
• Make sure all your equipment is turned
• Plug the signal source outputs into the
• Patch from that amp's THRU jacks to the
To prevent excessive loading
of your source, a general rule
of thumb is to maintain a
load impedance 10 times or
more than the source imped-
ance . If your console has an
The THRU jacks can also be used to relay
SLEEVE
RING
TIP
RING (COLD)
TIP (HOT)
SLEEVE (SHIELD)
SLEEVE
TIP
RING (COLD)
TIP (HOT)
SLEEVE (SHIELD)
13
Hide quick links:
Advertisement
Table of Contents
