Marenius SMF-5mkIII Quick Start Manual

SMF-5mkIII
UltraLowNoise Microphone Amplifier
• Two low-noise microphone inputs
• Input transformers by Lundahl
• Gain range 30 - 70 dB
• 48V phantom power
• Balanced XLR outputs
• Headphones socket
• 10 - 35 V power supply
• Compact size
SMF-5mkIII is a microphone amplifier with
ultra-low noise level. It is intended for high-end
recording with high resolution.
Each input has a top-of-the-line audio transformer
by Lundahl. With this transformer the low-frequency
distortion is negligible while frequency range is ex-
tended down to 5 Hz.
Harmonic distortion is down to 0.006% @ 1 kHz and
+12 dBu output with 30 dB gain.
The input referred noise level is -131 dBu with a
lowZ source.
Gain may be individually set for each channel. Basic
gain is selected with a toggle switch for 30 or 50 dB.
Additional gain and fine adjustment is controlled by a
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potentiometer for a maximum of +20 dB. Total gain is
30 to 70 dB from input to the balanced XLR output.
There is also a headphones output that will double
as unbalanced output.
Phantom power, 48 V may be selected by a toggle
switch on the front panel.
Power supply is by a separate mains adapter.
The power supply may be in the range 10 - 35 VDC.
In contrast to the previous model SMF-5 this version
will not run from internal battery power although an
external battery may well be used.
SMF-5mkIII is housed in an EMC shielded case.
An optional carrying case, made by PortaBrace, is
available.
for information about other MARENIUS products.
MARENIUS
ELEKTRONIKUTVECKLING AB
- Designers of Electronics -
P O Box 5086
SE-42605 V Frolunda, Sweden
Tel +46-31-691610
Fax +46-31-693188
info@marenius.com