THE FISHER K-10 Dynamic SPACEXPANDER@ Reverberation Unit
The FISHER Spacexpander adds a new dimension -reverberation -to most stereophonic (or
monophonic) home music systems Natural reverberation is created by the reflections (echoing) of
sound from the walls and ceiling Reverberation is just an echo a sound which reaches the
listeners ear a fraction of a second after the sound from the original source is heard For example,
in a large room or auditorium a single hand-clap is heard several times -first as a direct sound
impulse, then as reflected sounds (echoes) with each one weaker than the one heard a fraction of
a second before This dying out of sound is called "decay" -It depends on the size and shape of the
room or auditorium, the covering on the walls and ceiling as well as the furnishings, the number
of people and other objects contained in the enclosed area Unconsciously we estimate the size of
an area by the amount of reverberation (how much the echo is delayed and how long it takes to
decay)
The FISHER Spacexpander is designed to be used with FISHER high-fidelity components and radio-
phonographs but it can be connected into other home music systems with a few, slight, changes in
the original circuit even if it was not designed to use a Spacexpander or does not make use of the
FISHER Direct Tape Monitor system of tape recording
While the FISHER Spacexpander is easy to install and simple to operate (there is only one front-
panel control) positioning of the reverberation unit is most critical and it must be installed
exactly as illustrated and connected as indicated if you want to obtain the best possible results from
the Spacexpander
There are many ways of connecting a Spacexpander into a home system. The most frequently used
connections, for the most common high-fidelity component combinations, are given here- use the
connection instructions for the equipment which most nearly matches those used in your music
system.
If none of the connection diagrams seem to be suitable for your system write Richard Hamilton,
Customer Relations Department, Fisher Radio Corporation, Long island City, NY. 11101 Be sure to
include the make and model, and schematic diagrams, of all units in your home music system
Remember, the Spacexpander is designed -specifically for home music systems and not for
commercial recording, broadcasting or industrial installations or for use with amplifying
attachments for musical instruments, like guitars, or electronic organs. Information regarding
connections to systems other than home music types will not be supplied,
UNPACKING THE SPACEXPANDER
Carefully check the shipping carton to make sure that all the units and interconnecting cables
are removed. The carton should contain the following items;
1 Reverberation Chassis.
1 Electronics Chassis.
1 Control Unit (with knob, control plate and 4-foot interconnecting cable).
6 Audio interconnecting cables
Remove the tillers from the carton, if necessary, to make sure that none of the cables are
overlooked or small parts discarded.
INSTALLATION PRECAUTIONS
•
Electronics Chassis may be installed in any position.
•
Electronics Chassis must be placed so that air can circulate around it freely to prevent
overheating.
•
Reverberation Chassis must be mounted with its flanges in a vertical plane (as illustrated).
•
Reverberation Chassis must be mounted with complete shockmount material, as supplied.
•
Reverberation Chassis must be isolated from mechanical vibrations from speakers.
•
Control Unit cable may be increased to 12-feet total length.
•
Connecting cables between the Electronics Chassis and the Reverberation Chassis
may be
increased to 20-feet total length.
•
The power cable of the Electronics Chassis must be connected to a switched AC receptacle
(outlet) on the associated high-fidelity instrument
•
The Spacexpander MODE SELECTOR switch must be set to proper position
