Crown D-150 - Connecting Output Lines

A common problem which causes damage.and irritation is the
turn-on thump problem typical to many signal sources. Figure 3-7
shows. the schematic of a muter which, when. inserted inthe input
signal line, mutes. for several seconds before connecting the
source to the amplifier, thereby eliminating turn-on transients. it
aiso removes turn-off transients occurring after the relay drops
See 00).
FOR LOAD PROTECTION
BO this imuter ig not required.
rany signal source
NOTE: When using the CAO
whose AC power is switched by the IC-160.
Followingare. ey number of operating precautions givenasanaidto
understandirig proper-and improper. amplifier usage:
1 Use care ‘ine taking connections, selecting signal sources,
and Gontvalling the i U
thay bé your own. CROWN is: ‘any damage done to
loads “due to careless ampliier usage or deliberate over:
powering. For pointers on load: ibe see paragraph 3.6:
2)-Néver parallel the two ou
OF — ‘them with an
without a series isglating capacitor. Such operations may
damage the device and/or needlessly activate the V-Himiting
(see Figure 3-3),
4. Do-not short.the.ground. lead.of:an output cable to the input
signal ground as oscil Fay result from forming such a
grourid loop... =
8. Operate and fuse the amplifier only as set forth in paragraphs
34.
6. Operate the amplifier from AC mains of not more than 10%
above the selected ‘fine voltage and only on’50, 60 or 400Hz
AG: Falling to comply with these: aes will sec siyatate ine
warranty.
7. Never connect the output toa power supply output, battery; or
power main. Damage incurred by such a hookup is not
covered by the warranty,
8. Do not expose the. amplifier to corrosive chemicals eehs as
soft drinks, lye, salt-water, ete. ~~
De To apt rt ecrmende fr ih ower industria
usage at frequencies above 20KHz.
10, Tampering.in. the. cireuit:-by unqualified. personnel or the
making of unauthorized circuit modifications invalidates the
warranty.
11. Donotexpose the output leads to areas likely to be struck by
lightning. Such an: installation, could invalidate the. amplifier.
3.8 CONNECTING OUTPUT LINES
input and output connéctors are located on the.chassis as shown
in Figure 3-8,
FIGURE 3-8.
REAR VIEW OF CHASSIS
Rt ig always wise to remove power from the unit and tum the input
level controls off while making connections, especially if the toad
is a loudspeaker system. This will eliminate any chance-of toud
blasts. CROWN is not liable for darnage incurred at any trarisducer
to its being overpowered! The use of the enclosed speaker fusesis
therefore highly recornmended:~ -
Before making connections, it is recommnended that the aperator
farniliarize himself wth the amplifiers protective system.
Reterence paragraph 3.6.
Because of the locations of the output connectors (color-coded
binding posts) it will be easiest to make these connections first.
High-quatity, dual “banana” plugs are the preferred connections
for permanent installations. ©