Instruction manual

5
Turn volume control fully counter-clockwise and reverse input connectors. If sound changes from one speaker to the
other, check source or replace inter-connect wires. If the sound is still coming out of the same speaker only, check
speakers on another piece of equipment for proper operation.
Static, noise, or hum:
Turn the potentiometers Individually
clockwise/counter-clockwise until hum goes
to the lowest level each channel.
DAMAGE REQUIRING SERVICE
The amplifier should be serviced by opera
audio company or any qualified service
personnel when:
The Power-supply cord or plug has been
damaged.
Objects have fallen or liquid has been spilled
into the amplifier.
The amplifier does not appear to act normally or exhibits a marked change in performance.
The amplifier has been dropped or the enclosure damaged.
Power-Cord
The power cord should be routed so that it is not likely to be stepped on or pinched by items placed upon or against it.
Cleaning
Dust periodically with a clean, soft paint brush. Fingerprints can be removed with a moist polishing cloth. Never clean
with furniture polish, benzene, or volatile liquids.
Speaker Impedance
For best performance, the load presented by the speaker has to match the M100Splus’s output impedance per channel.
Refer to the manufacture’s information for your speaker nominal impedance. The M100Splus is factory set to match
the speakers at 8 ohms and 4 ohms.
THEORY OF OPERATION
The cyber100S is a push-pull Class A integrated amplifier with little global feedback. The Ip of 300B is factory set at
60mA. Signal goes first to the 12AX7 dual triodes which act as input stage and then to the 6SN7s dual triodes which
act as drive stage. The 6SN7 drive the 300B output tubes, one matched pair per channel. The 300Bs are transformer-
coupled to the load (In this case, the speaker).
TECHNICAL SPECIFICATION
CONTROL FUNCTIONS: Volume, Select, Power On/Off
POWER OUTPUT: 22 watt x 2, RMS 1kHz
TOTAL HARMONIC DISTORTION: less than 1%(10watt, 1kHz)
FREQUENCY RESPONSE: (-3dB points at 10 watt) 8Hz-60kHz
INPUT SENSITIVITY: 230mV
INPUT IMPEDANCE:100k ohms
OUTPUT IMPEDANCE: 4, 8 ohms. (User selectable.)
SIGNAL/NOISE: 90dB
CONSUMPTION: 120watt
INPUT INTERFACES: 5 groups (RCA) 1,2,3,4,5
INPUT INTERFACES: 1 groups (RCA)
OVERALL NEGATIVE FEEDBACK: Little
VACUUM TUBE: 300B x 4,12AX7 x 2, 6SN7 x 2
DIMENSIONS: 430 ( L ) x380 ( W ) x 190( H ) mm
WEIGHT: 25kg ( packed )
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
USING TUBES