reversed polarity connection attempts. Current requirements of the DI-PREAMP are less than 20mA, resulting in an expected battery
life of about 15-25 hours depending on the type and quality of battery used. While the Rosette DI PRE itself is tolerant of noise from
outside power supplies, inadvertent ground loops can be created between pedals generating noise between each other. In the event
that noise is encountered, start with powering and connecting the DI-Preamp first, then add pedals noting which pedal is responsible
for introducing the noise.
PREAMP OUT XLR JACK
This output jack is fully balanced and can deliver a +4dBu (Line Level) with a maximum output
level of about +12dBu. The XLR PPREAMP OUT offers plenty of signal to drive any of the standard pro audio power amplifiers or
powered monitors on the market today and this is its primary function. The Rosette DI Pre can be incredibly compact and handy as
your advanced acoustic instrument Tone control device by plugging in to any standard powered monitor or power amp and speaker
enclosure. The signal is derived after all voicing and EQ filters as well as after the MASTER volume control. It is also fully phantom
power protected, in the event of accidental connection to an input that has phantom power present.
PREAMP OUT GROUND LIFT SWITCH
This switch connects or lifts the circuit ground/earth/common connection from
Pin 1 on the XLR PREAMP OUT connector only. Balanced Outputs do not rely on the Pin 1 or Shield connection to transmit signal to
the amplifier. While Pin 1 is almost always connected to amplifier’s ground bus, often (due to differences in potential of a building’s
ground/earth system) currents will flow between grounds if there is a common connection, resulting in hum. By lifting the ground at
the sending (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. Now, the one thing that complicates this is that at very high (radio) frequen-
cies, 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 power amp.
PREAMP OUT ¼” (6.3mm) JACK
This output jack is unbalanced and can deliver a +4dBu (line level) with a maximum output
level of about +6dBu, enough to drive any of the standard MI type power amplifiers Inputs on the market today, including all amplifier
Input jacks, power amp Input jacks, and FX Return power section inputs. While this output is phantom power protected, it is unlikely
that phantom power is ever encountered on a 1⁄4” (6.3mm) input as this violates industry standards.
FX (Eects) LOOP ¼” (6.3mm) JACK
A serial (series) FX LOOP is provided (FX SEND and FX RETURN jacks) for con-
necting both Line Level outboard effects devices and pedals such as compressors, and parallel outboard devices and pedals such
as delays, reverbs, harmonizers and octavers, etc. by using the wet-dry mix control on the outboard device. This loop is located right
before the MASTER volume control. The FX LOOP’s RETURN jack contains a “normal switch” that interrupts the signal whenever a
plug is inserted into the RETURN jack, and automatically bypasses the FX LOOP when the plug is removed. Because of this, the FX
SEND jack may be used as another post-EQ, pre-MASTER volume Output.
DIRECT OUT XLR JACK
A feature that sets the Rosette DI Pre apart from the rest of the market is the studio grade XLR
(male) Balanced Direct Output. This high-quality, professional-grade output is capable of driving balanced analog lines as long as
500 feet, are fully phantom power protected, are noise resistant and stability compensated for reliable, high quality signal transmis-
sion to either Stage Monitor and/or Front Of House and Recording consoles. These outputs follow the Pro Audio standards of pin
2=non-inverting, pin 3=inverting and pin 1=ground. Every known console in the world follows this wiring standard, so interfacing will
be consistent and reliable no matter where you roam with your amplifier.
This fully featured, great sounding DI Section separates the Rosette Pre as a fully professional performance tool that will shine in any
environment you put it in, in any size venue – from Club to Concert Stage to Studio.
DIRECT OUT GROUND LIFT SWITCH
This switch connects or lifts the circuit ground/earth/common connection from Pin
1 on the XLR DIRECT OUT connector only. Balanced outputs do not rely on the Pin 1 or Shield connection to transmit signal to the
audio console. While Pin 1 is always connected to console’s ground bus, often (due to differences in potential of a building’s ground/
earth system) currents will flow between grounds if there is a common connection resulting in hum. By lifting the ground at the send-
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