ing (preamp) end, this allows the shielding to remain in place while breaking the ground current flow that is the cause for inducing
hum into the signal carrying pair of conductors. One thing that complicates this is that at very high (radio) frequencies, ground is not
“really” ground, so additional techniques are incorporated within this network that allows 2 functional grounding spectrums within the
same network, providing added RFI (radio frequency interference) rejection. The general rule is to start with Pin 1 lifted, and if there
is noise, then try connecting it. It should also be noted that there are a lot of other possible causes for noise, this switch is a solution
for ground loop noise between the preamp and the console.
DI OUT SOURCE SWITCH
This switch selects the signal source routing that is used to derive the DIRECT Output signal. In
the PRE position, the signal is sourced directly from the input buffer (pre GAIN control), so the ROSETTE INPUT (GAIN) and EQ set-
tings will have no effect on the instrument’s sound. In the POST setting, the signal is sourced from the output of the 4-Band Equalizer
section and before the MASTER volume control. Generally, for live PA use the FOH (Front Of House) engineer will probably prefer a
PRE-EQ signal because the capability of his PA system and the venue needs may be significantly different than the stage rig and the
EQ that pleases you on stage may not work on the bigger system in the venue’s larger acoustic space. For Recording, depending
on the tracking goals of the engineer and sound desired, PRE or POST might be used.
Enjoy your new Preamp!
That wraps it up for the Controls and Features of your Rosette DI Preamp. Exercise a little patience
the first couple weeks of ownership and learn the controls. You will be well rewarded for your time
spent with years of enjoyable performance.
Thank you for your support and for trusting us to be your Amplifier Company. We never take it for
granted and we wish you countless hours of fun, inspiration and enjoyment from your new instrument.
Feel free to reach out to us anytime you may need assistance. We’re always glad to hear from you!
From the Entire MESA/Boogie Family. Welcome and Enjoy!
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