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Power Supplies and Matrix Amplifier
Battery Supply BS 48 i
The battery unit supplies one microphone with 48 V phantom pow-
ering (P48). The maximum supply current is 5 mA.
The audio output is dc-free. Therefore, no transformer is needed
when connecting to unbalanced inputs. The cables couple to the
BS 48 i through XLR 3 connectors.
Maximum length of operation depends on the type of battery and
the current drain of the microphone. A microphone requiring e.g.
2 mA can be operated at least 20 hours with one alkaline battery.
Output voltage ............................... 48 ± 1 Vdc
Maximum current output ..........................5 mA
Battery .................................... IEC 6 F 22, 9 V
Weight.......................270 g (without battery)
Hx W x D .......................... 37 x 80x 102 mm
BS 48 i .................blk ........ Cat. No. 006494
Battery Supply BS 48 i-2
The battery unit supplies one or two microphones with 48 V phan-
tom powering (P48). The maximum current drain is 5 mA for each
microphone. The audio outputs are dc-free. Therefore, no trans-
former is needed to connect to unbalanced inputs. The unit has
two XLR 5 connections which can be split to XLR 3 connectors
with AC 20 and AC 21 adapter cables.
Maximum length of operation depends on the type of battery and
the current drain of the microphone. A microphone requiring e.g.
2 mA can be operated at least 20 hours with one alkaline battery.
Output voltage ............................... 48 ± 1 Vdc
Maximum current output .....................2 x 5 mA
Battery .................................... IEC 6 F 22, 9 V
Weight.......................310 g (without battery)
H x W x D ............................. 37 x 80 x 102 mm
BS48 i-2 ............. blk........ Cat. No. 006496
(Remote Control) Power Supply N 248
The N 248 supplies one stereo microphone, or two mono condens-
er microphones with 48 V phantom power (P48). All connectors
are of XLR 3 type. The audio signal outputs are DC-free. The 5 direc-
tional patterns of the TLM 127 and TLM 170R can be remote con-
trolled with rotary switches. The remote control operates by vary-
ing the nominal phantom voltage of 48 V over a range of ± 3 V (pat-
ented). As in standard operation, cable lengths up to 300 m are
permissible. Set to P48, all conventional microphones can be used
as well. Even mixed operation is possible, with one channel remote
controlling a TLM127/TLM170R, while the second output sup-
plies a conventional microphone.
Three versions are available.
Mains voltage Euro ..................... 230V/50 Hz
Mains voltage US........................117V/60 Hz
Mains voltage UK........................240V/50 Hz
DC voltage input ................................5...15 V
Power consumption..........................max. 3 VA
DC voltage output ...................48 V ± 3 V each
Current output .........................max. 5 mA each
H x W x D .......................... 38 x 143 x 103 mm
Weight...................................................415 g
N 248 EU ............. blk ........Cat. No. 008537
N248 US ............. blk ........Cat. No. 008538
N 248 UK ............. blk ........ Cat. No. 008539