Direct Out Section; Usb Device Power - Mesa/Boogie Subway TT-800 Owner's Manual

and operates like a "bus input" directly feeding the power amp. You will need to use the volume control on the aux device
and should start with the aux device's volume all the way down before powering the amp up.
DIRECT OUTPUTS (DI OUT):
inclusion of a two tube driven studio grade XLR balanced direct outputs:
PRE-EQ DIRECT OUTPUT:
make it more useful for many practical applications. The signal take-off point for this output is post front end gain, post deep and post
bright switches as well as being tube driven by the very first tube stage. This brings additional character to the signal, while remaining
pre channel gain control, pre eq and pre channel volume controls. This allows the basic character of the amp's neutral voicing to be
set up and sent to this direct output.
POST-EQ & POST MASTER DIRECT OUTPUT:
volume and post channel switching, which allows it to capture the output tube emulation circuitry along with each channel's HPF and
EQ. This output follows the channel switching, which makes it more usable when using the amp as a 2 channel amp. Because of this,
as a courtesy to the FOH and monitor engineers, discuss how best to make this work for them so that they can do their best for you.
Both of these DIRECT OUTPUTS are fully balanced, capable of driving balanced analog lines as long as 500 feet, are fully phantom
power protected, noise resistant and stability compensated for a reliable, low noise floor, high quality signal. 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.
DIRECT OUTPUT LEVEL:
audio engineers prefer mic level, be sure to ask which they prefer.
DI OUT PIN 1 LIFT:
connector. Balanced outputs do not rely on the pin 1 or shield connection to transmit signal to the console. While pin 1 is always con-
nected to the console's master ground bus, sometimes (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 source (bass amp) end, this
allows the shielding to the console's input to remain in place while breaking the ground current flow that is responsible for inducing
hum into the audio 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 simultaneously 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, try connecting it and see if the noise level drops. It should also be noted that there are a lot of other
possible causes for noise, this switch is only one solution for ground loop noise between the PA and the bass amp.

USB DEVICE POWER:

cording, jamming or even performing. It may also be used to recharge phones, MP-3 players, iPods, and any number of devices. This
port follows the PC USB 2.0 standard, rated current is 500mA maximum, and conforms to the Apple USB charge current standard.
While this charge port will work with most devices, there are some that do not conform to any current demand/limit standards or must
be operated from a high current (or proprietary) USB charge port only. These devices will either charge more slowly or possibly not
at all. Due to the lack of uniformity in the market following standards, and continual evolution/changing of the standards, this port is
offered as a convenience only. Note that when charging some cell (mobile) phones, the phone can emit strong bursts of RF energy
as it communicates with the towers. This is a potential source of randomly appearing noise which can be eliminated by placing the
phone in airplane mode or shutting it off entirely.
This USB device power can also be used to drive any number of USB devices, including power converters that provide 9 volt pedal
power. Because pedal power devices step up the voltage, the available current decreases to ~300 mA at 9V.
A new feature that sets your new SUBWAY TT-800 apart from the rest of the market is the
This output is pre-channel gain stages, but is a little unique due to some enhanced features that
This switch configures the level of the direct output to either mic level or line level. While many
This switch connects or lifts the circuit ground/earth/common connection from pin 1 on the XLR DI OUT
This connector provides power to USB devices that might be used in conjunction with practicing, re-
This output is also unique as it is post both channel's eq, post channel
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