Hafler 0915P manual Line Level Inputs Phono Section

CONVENIENCE OUTLETS

LINE LEVEL

INPUTS

PHONO SECTION

(When Installed)

For	units	wired for 100-120 VAC, the	Power Switch controls	the Switched	Convenience Outlets	only.
As	soon	as the 915 is plugged into	the AC line, power is	applied to the	circuitry (regardless	of the

position of the front panel Power Switch). Therefore, all connections should be performed with the unit unplugged.

For all units, when power

is

applied, the

Ready Light

will glow red for several seconds,

indicating that

the Audio and Headphone Outputs

are

muted.

Once

the delay

period has

passed

and

the

power

supply has

stabilized, the

light

will

turn green. The preamplifier is now ready

to

enjoy.

The muting

will

reactivate

immediately (and the

Ready

Light turn red) upon loss

of

AC

line

voltage,

(or operating the Power Switch on

200-240 VAC units), or if line voltage falls below a level which

precludes proper

operation

of

the

preamplifier’s

circuitry.

Units wired for 200-240 VAC are

supplied

without

convenience

outlets

to

conform

to

Regulatory

Safety requirements.

Units wired for 700- 720 VAC have

a total of five outlets for connection of associated components. The

Unswitched

Outlet is powered

at all

times, which

should generally

be

used

for

a turntable

or

tape deck.

The remaining four Switched Outlets are powered when the front panel Power Switch is engaged, as

indicated	by the switch’s			green pilot light.
The maximum		power	available from these		outlets is	1200	watts	total. This total power may be drawn
from a	single	outlet,	or	a combination of	outlets.	Since	some	power amplifiers consume more than

1200 watts at maximum output, check the power amplifier’s rating before connecting to these convenience outlets.

The inputs labelled			CD, Tuner, Video, Aux 2, and Phono/Aux			1 (when the Phono Option is not
installed), are		identical line		level inputs. The names chosen for		these inputs are for convenience only,
and may be used interchangeably, or					for any other type of line	level	source. These inputs are selected
via	the rotary	front	panel	Selector	Switch.
The	Phono/Aux	1	input is	converted from a line level input to a		high	gain RIAA phono input when the
Phono Option		is installed.		See Phono Section.

The 915 Preamplifier is available with an optional Phono Amplifier section. This option may be

installed

at time of

purchase,

or

at

a later date.

Inclusion of this option is

indicated by

the

presence

of a switch

button

protruding

from

the

rear

panel opening marked

MC/MM. Otherwise,

this

opening

will be filled by a plastic cover.

The

MC/MM

switch should be set to MC for low

output (typically

0.2

-

0.5

mV)

moving

coil

cartridges,

and

set to

MM for high output (2 - 5

mV)

moving coil cartridges

or

moving magnet

cartridges.

NEVER OPERATE THE MC/MM SWITCH UNLESS THE VOLUME CONTROL IS TURNED FULLY

DOWN.

The

very high gain present in

the Phono Amplifier can result

in switching transients

capable

of

blowing

amplifier

or

speaker

fuses,

and possibly damaging some loudspeakers.

The

ground

terminal

near

the

MC/MM

switch is provided for turntable frame grounding via

the

extra

ground

wire

provided on

most

turntables.

As

supplied

from the factory, the phono

cartridge

input termination

is

47,000

ohms

in parallel

with

220

pF

in

the Moving Magnet mode,

and 100 ohms

in the Moving

Coil

mode.

The

value

of

capacitance

and resistance is user selectable via plug-in components. See “Installing Cartridge Loads” for further

information and instructions.

-6-