read this first
before using the LL2A
There is a lot more in this manual, but please read this even if you
don’t read manuals.
To power the LL2A, you must use the supplied In Phase Engineering
16 volt 0.3 amp, dc regulated, bipolar, switch mode power supply.
This supply, designed in house, is specifically for use with Little Labs
high-end pro audio electronics. You can plug it in any AC outlet in the
world 100-240 volts 50 or 60Hz.
The dc power connector jack used on the LL2A looks like a CB micro-
phone connector. Although difficult to misalign because it has a key,
take care to align the plug and jack properly when inserting.
If you open the LL2A, use the tools provided, one for the knob remov-
al (1.5mm Allen hex L-key) and one for the panel (3/32” Allen hex
L-key). If rack mounting using the LL2A rack kit, please remember to
disconnect the power beforehand. There are internal high voltages on
the PCB traces and wires next to the Nixie tube. Please contact Little
Labs for any service issues.
The I/O of the LL2A is unique. It is balanced mono, but in a unique
differential way, when fed a balanced signal, it remains balanced
throughout the LL2A. It is two single-ended (unbalanced) audio
paths, one for the positive, pin 2 of the XLR (tip of the TRS), and one
for the negative, pin 3 of the XLR (ring on the TRS).
So with the right cabling, you can run the LL2A unbalanced stereo.
See more about running in stereo further in the manual.
Happy compression sound soldiers!
