21
17
Input Mode switch (stereo / mono)
7KLV VZLWFK LV XVHG WR DGDSW WKH DPSOL¿HU WR WKH
number of used inputs.
Stereo: Select this switch setting if both input chan-
nels (A and B) are used. In this mode an optimized
sum signal is generated by the input signals of the
channels A and B.
Mono: In mono operation only input channel A
needs to be connected e.g. the signal source only
SURYLGHVDPRQRVLJQDOIRUVXEZRRIHUDSSOLFDWLRQV
18
Power & Protect LED
The power and protect LED indicates the operating
PRGHRIWKHDPSOL¿HU
Green:
7KHDPSOL¿HULVUHDG\IRURSHUDWLRQ
Yellow:
7KH DPSOL¿HU LV RYHUKHDWHG 7KH LQWHUQDO
WHPSHUDWXUHSURWHFWLRQVKXWVGRZQWKHGHYLFHXQWLO
LWUHDFKHVDVDIHWHPSHUDWXUHOHYHODJDLQ
Flashing yellow:
7KH IXVHV LQVLGH WKH GHYLFH DUH
blown. Please check the fuses and, if necessary,
replace them. They may only be replaced by identi-
FDOO\UDWHGIXVHV[$PSHUHWRDYRLGGDPDJH
RIWKHDPSOL¿HU
Red:
$PDOIXQFWLRQKDVRFFXUUHGWKDWPD\KDYHGLI
-
ferent root causes. The HELIX C ONE is equipped
ZLWKSURWHFWLRQFLUFXLWVDJDLQVWRYHUDQGXQGHUYROW
-
DJHVKRUWFLUFXLWRQORXGVSHDNHUVDQGUHYHUVHFRQ
-
nection. Please check for connecting failures such
as short-circuits or other wrong connections. If the
DPSOL¿HU GRHV QRW WXUQ RQ DIWHU WKDW LW LV GHIHFWLYH
and has to be sent to your local authorized dealer
IRUUHSDLUVHUYLFH
19
Fuses
The input fuses are connected in parallel and pro-
YLGH SURWHFWLRQ DJDLQVW DQ LQWHUQDO IDXOW RI WKH GH
-
YLFHWKHUHIRUHWKHV\VWHPPXVWEHDGGLWLRQDOO\SUR
-
tected by a further main fuse located close to the
EDWWHU\PD[GLVWDQFHIURPEDWWHU\FP´
7KH+(/,;&21(LVHTXLSSHGZLWK[$PSHUH
fuses.
20
Impedance selection switch
By using the
impedance selection switch
the im-
pedance of the connected loudspeakers (4 Ohms,
2 Ohms or 1 Ohm) has to be selected accordingly.
,IVHYHUDOORXGVSHDNHUVDUHFRQQHFWHGWKHLPSHG
-
DQFHFDQEHDSSUR[LPDWHO\FDOFXODWHGDVIROORZV
Series connection:
=WRWDO =[Q
Parallel connection: Z total = Z / n
(n = amount of loudspeakers; Z = loudspeaker im-
pedance)
Note:
If speakers with “3 Ohms” impedance are
used, please choose the position “4 Ohms”.
Important:
In
TwinPower Link
operation both am-
SOL¿HUVPXVWKDYHWKHVDPHLPSHGDQFHVHWWLQJVHH
page 19, item 7;
TwinPower Link switch
).
21
LED switch
7KLVVZLWFKLVXVHGWRWXUQRQDQGRႇWKHH[WHQGHG
/('LOOXPLQDWLRQRIWKHDPSOL¿HU,WKDVQRHႇHFWRQ
the LEDs below the fan, which are used as ultra
ORZQRLVHFXUUHQWVRXUFHVLQWKHRXWSXWGULYHUVWDJ
-
es. The functionality of the
Power & Protect LED
UHPDLQVXQDႇHFWHGDVZHOO
Note:
The number of illuminated LEDs depends on
WKHVHWWLQJVPDGHRQWKHDPSOL¿HU±HJ0212RU
STEREO mode.
22
&XWRႇ)UHTXHQF\VZLWFK
7KHVH VZLWFKHV DUH XVHG WR DGMXVW WKH PD[LPXP
XSSHUFXWRႇIUHTXHQF\RIWKHK3)DQG
ORZSDVV/3)¿OWHU$IWHUZDUGVD¿QHWXQLQJFDQEH
done with control 10 (
LPF
) and 11 (
HPF
).
23
X-Over switch
7KLV VZLWFK DOORZV WR VHW WKH LQWHUQDO FURVVRYHU WR
highpass, fullrange or bandpass mode.
If the
X-Over switch
3)WKHFURVVRYHUIUH
-
quency for the highpass can be adjusted with the
UHVSHFWLYH
&XWR௺)UHTXHQF\VZLWFK
(22) and control
(11 /
HPF
).
$WVZLWFKSRVLWLRQ)8//IXOOUDQJHWKHFURVVRYHULV
bypassed.
At switch position BPF a bandpass is created in
any case. This means that the highpass is always
DFWLYH
. By adjusting the highpass (switch 22 and
control 11 /
HPF
) and lowpass (switch 22 and con-
trol 8 /
LPF
¿OWHUDQ\EDQGSDVV]DQG
4,000 Hz can be realized.
