LR Baggs M80 - Manual (Page 4)

ACTIVE OR PASSIVE OPERATION
The M80 offers you the option of either “active” or “passive” settings, essentially
giving you two pickups in one (see figure 2).
Active setting - In this setting, the M80 engages a high quality, all-discrete
preamp that is specifically tuned to optimize the M80’s performance. With
optimal noise cancellation and a higher output level, the active M80 can plug
directly into a P.A. or acoustic amplifier without an external preamp. If your battery
dies during a performance, you can continue using the M80 by switching to the
“passive” setting and making the proper external adjustments.
Passive setting - In this setting, the M80 bypasses the preamp for a battery-free
performance. This setting also allows you to use the pickup with an external
soundhole cable (sold separately) to avoid permanently modifying high-end
or vintage guitars and also makes transferring the M80 from one guitar to
another quick and easy.
BATTERY CHECK & REPLACEMENT
Press this button to check battery life (see figure 3). A full battery will light up
all 4 lights and should give you approximately 300 hours of playing time. When
Fig. 2
Fig. 3