LR Baggs RTS 2 - Manual (Page 3)

the RTS 2, but to avoid crosstalk, the second pickup must have a low impedance
output. This requirement basically eliminates everything but magnetic pickups
and mini-mics. Do not use high impedance pickups such as the iBeam.
Adding a mini mic: To add a mini-mic, solder the hot lead to positive and the
ground lead to negative of the auxiliary passive input and run both pickup and
mic down a stereo cord to a Mixpro. Be sure to turn the Mixpro's ring channel
phantom power on or the mic will not work. The tip channel phantom power
must be off. See the Mixpro manual for the locations of these switches.
Adding a second pickup: Add a second pickup the same way to the auxiliary
passive channel, and run both signals down a stereo cord to a Mixpro, or use a
stereo Y cord to two Para DIs. If you wish to use the RTS 2 with a second pickup
into the Mixpro, make sure the phantom power switches on the Mixpro are
turned off for both ring and tip channels.
Often in a two pickup system the "default" pickup will be preferred to be on the
tip contact of the strapjack. On the RTS II preamp, the Ribbon Transducer output
is routed to the tip contact but a provision has been made with solder bump
jumpers on the PC board to reverse the pickup assignment, as shown in figures
1 and 2. Using a soldering iron with a small tip, scrape the older solder off the
jumpers until a small gap appears between the jumper pads. Then add solder
across the other gap, until a bridge forms. Do this on both jumpers so they look
like figure 2. This will allow the second pickup to be the default pickup on the
tip and the Ribbon Transducer to be on the ring. Plugging and unplugging the
cord will still turn the preamp on and off.
Pairing the RTS II with the Gigpro or Mixpro: The RTS II preamp has a built-in
EQ curve. Both the Gigpro and Mixpro preamps also have a built-in EQ curve
when the controls are set "flat" at 12:00. If you wish to use the Gigpro or Mixpro
with the RTS II, we recommend that you back off the EQ on the Gigpro or Mixpro
to avoid a double EQ. Reduce the gain control and low cut entirely and start
with both the bass and treble EQ on the Gigpro or Mixpro in the 8:00 to 9:00
positions, then adjust to taste.
+
RT active input (A)
aux passive input (B)
solder bump jumpers
A to tip B to ring
+ -
-
+
RT active input (A)
aux passive input (B)
solder bump jumpers
A to ring B to tip
+ -
-
fig. 8
fig. 9