National Horizon 5 Instruction Book

The
National
INSTRUCTION BOOK FOR
The National Horizon 5 preamplifier — control unit
introduces a new concept in preamp design. When
used in conjunction with the National Horizon 20 am-
plifier or the National Criterion tuner, no complicated
external connections are required. The preamp simply
plugs into either unit through an opening in the front
panel. Once installed, the compensating controls,
selection of inputs and the individual bass and treble
controls become an integral part of the tuner or am-
plifier. If desired, the Horizon 5 preamplifier may be
used with other high quality, high fidelity audio equip-
ment. Its exceptionally compact design and ease of
mounting make it adaptable to any custom installa-
tion. The unusual range of its controls and compen-
sating circuits make it outstanding among units of
this type and, when used with the National tuner and
amplifier, it affords the ultimate in listening pleasure.
PREAMPLIFIER
-CONTROL UNIT
FEATURES
UNIQUE PLUG-IN DESIGN: Preamp becomes an
integral part of either the Horizon 20 amplifier or the
Criterion AM-FM tuner permitting maximum flexibility
of custom installations.
INPUT ADAPTABILITY: Accommodates TV, Tape,
Tuner and Phono. When the Selector switch is at TV
or Tape, the input circuit gain can be adjusted to ac-
commodate levels from 50 mv, to 5 volts. The Tuner
input is fixed to accept a 1-volt output from the Cri-
terion or the majority of high-quality tuners. A switch
at the Phono input provides for either 10-mv or 30-mv
phonograph cartridges.
OUTPUT IMPEDANCE: About 3000 ohms with 30-
db of feedback. The Horizon 5 may be used with
output cables up to 50 feet in length permitting a
wide variety of custom layouts.
Please use this manual. It has been prepared with the prime purpose of enabling the user to obtain
full satisfaction from this product.
NATIONAL COMPANY, INC.,
MAIDEN & MELROSE, MASS.