MANUNTA
BY M2Tech
www.manunta-audio.com
EVO Phono 3
Phono PreamplifiER
REVISION P
R
A – November 2022
7. Using the
Evo Phono 3
At activation, the
Evo Phono 3
performs a routinary check for all indicators, then it sets
idle ready for commands.
7.1. Gain Settings
Due to the structure of the signal chain, the MM stage gain and the MC step-up gain can
be set independently. The MC gain is indicated by the 5 LED’s to the left of the front panel.
The MM stage gain is indicated by the 3 LED’s to the lower right of the front panel.
NOTE: Please remember that the MC step-up gain adds to the MM stage gain when
the MC input is selected.
NOTE: When the MM input is selected, all LED’s to the left of the front panel are off,
because MC step-up gain is not relevant for the MM input.
The MM gain is sufficient to accommodate every MM and medium-to-high MC cartridge,
including most of the moving iron and moving flux models which work well when loaded
with 47k Ohms. Choose 40dB when using most MM cartridges. 52dB are suitable for 1mV
output cartridges, while 46dB can be chosen for 2.5mV output cartridges. The setting also
depend on the preamplifier sensitivity.
Setting the MC gain requires operating on both the MM gain and the MC gain. If a total MC
gain of 60dB is required, set the MM gain to 40dB and the MC gain to 20dB.
NOTE: Please note that the MM gain set for the MC input doesn’t affect the MM gain
set for the MM input and vice versa. This is useful when two cartridges are
connected to the
Evo Phono 3
at the same time.
7.2. MC Input Load Impedance
The
Evo Phono 3
is provided with a knob on the back panel which allows for setting the
MC input load impedance between 10 Ohms and 1000 Ohms (Figure 2, 10). This range
covers all the low and medium output MC cartridges requirements.
Please set the knob to the appropriate value as indicated by the cartridge’s user manual. If
this value is not found on the manual, a good rule of the thumb is to set the load
impedance to 10 times the cartridge’s internal or output impedance.
NOTE: Too low or too high a value with regards to the recommenced loading value
will not harm either the cartridge and the
Evo Phono 3
; anyway it will impair the
sound quality, particularly in the treble range.
NOTE: Please note this setting only affects the MC input, the MM input’s load
impedance is always 47k Ohms.
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