External Speaker Connection - Wurlitzer One More Time Vinyl Operating Instructions Manual

14

External speaker connection

The amplifier can operate in two
different modes. The normal operation
mode reproduces the music in normal
stereo sound. So external speakers
can be added to each channel.
The so-called 2-Channel mode uses
both stereo channels like separate
mono amplifiers so that the sound can
be reproduced in different rooms but
then in mono only.
The amplifier may not be loaded with
more than 4 ohms per channel (less
ohms means more load!). On an
overload it switches itself off. After a
certain cool down time it switches
itself on. So if you do not eliminate the
reason for the overload the amplifier
produces continuously volume drop-
outs.
The impedance of all external speakers per channel in "Stereo" mode should not be less than 8
ohms, because the internal speakers represent a load of already 8 ohms per channel. If the amplifier
is operating in 2-Channel mode, the internal speakers are all connected to the RH channel (Channel
1); the LH channel (Channel 2) now applying to the screw terminals "Externer Lautsprecher -
External speakers" may be loaded with max. 4 ohms.
The output power of the amplifier is approx. 55 watts (rms on max. 1% dist.) on a 4 ohms speaker
per channel, 18 watts to a 12 ohms speaker and approx. 9 watts to a 24 ohms speaker. That means,
that e.g., a 12 ohms speaker connected to the external channel at Dual Channel operation must be a
type of at least 18 Watts, otherwise the speaker is in danger of destruction at higher volumes. Note
that speaker groups like in hi-fi boxes may have, at certain frequencies, impedance much lower than
their rating. Make sure that all speakers are connected in correct polarity.
OMT VINYL – edition: 13.08.2007
D A
ECKEL BNEHMEN
R C
EMOVE OVER
4
M
ECHANIK
M ECHANISM
CAUTION
TO REDUCETHE RISK
OF FIRE REPLA CE ONL Y
WITH SAMETYPE AND
RATING FUSE
S
ICHERUNG
F USE
100-240 V 117 V
50Hz/60Hz 60Hz
T 4 A 3,0 AMP
250 V AC
SLOW BLOW
30V~ 26V~ 26V~
AC AC AC
2-K / 2-C
ANAL HANNEL
S TEREO
I NTERNER AUTSPRECHER L
I S
NTERNAL PEAKER
F1 F2 F3
CD-T
3 RAFO
CD-T RANSFORMER
B -T
UBBLE UBES
N ETZTRAFO
T
RANSFORMER
Position of the Stereo - Mono DIP switch (1), the
mode switch (2), the stereo - 2 channel switch (3)
and external speaker terminals (4).
Coin and credit programming
Verstärker K 99
0056041
Amplifier K 99 C-UL
0058484
M
ONO
S TEREO
I E
ntern xtern
C 1 C 2 BGM
B T
hannel hannel ass reble
F1 - F4
A / D
NZEIGE ISPLAY
M 1
UTE
AVC
T APE
RS232
BGM
M ICRO
12V=
DC
ok.
S / S
CHALTER WITCHES
AUTO 1 MUTE AUS/OFF
2 RS232 SERVICE
NORMAL
1 PARALLEL
SEPARATE VOLUME
2 A VC
HIGH LOW
A /O 3 A VC E /O
US FF IN N
S 4 MODE 2-K /2C
TEREO ANAL HANNEL
CD 5 INPUT T
APE
F4
A US /O FF 6 BGM E /O IN N
E RWEITERUNG
E
XTENSION
F
ERNREGLER
R
EMOTE- ONTROL
2
D A
ECKEL BNEHMEN
R C
EMOVE OVER
C
15