White’s Electronics MXT 300 - Manual (Page 25)

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Chapter 6 MXT 300 Searching
The headphone jack on the MXT 300 is located
on the control box above the battery compartment.
There is a dust cover on the headphone jack that
needs to be removed before the stereo plug from
the headphone is inserted. Replace it when head-
phones are not being used. Most users prefer high
quality stereo headphones so White's has chosen
to wire the headphone jack for stereo. If you have
a mono headphone, you can purchase an adapter
that will allow sound in both earpieces. Some
headphones come with a switch for stereo or mono
jacks.
In choosing headphones, make sure they have a
VOLUME CONTROL as there is no target vol-
ume control on the MXT 300. This is an important
comfort issue. Remember that you want the faint-
est THRESHOLD "hum" possible but a strong
comfortable target signal. With headphones you
will be able to work with a lower THRESHOLD
"hum", hear fainter target signals, avoid bothering
others with a "beeping" box, and save on bat-
tery life. Many high quality headphones from full
ear enclosure to lightweight summer models that
offer a bit more safety in snake and bear country
are available on the market. Higher impedance
headphones (60 Ohms or greater) give the most
sensitivity and are better for hearing the tiny
targets most likely to be heard while prospecting.
Properly balanced impedance is important as well
as low distortion.
Chapter 5 MXT 300 Controls