FirstWatt SIT-2 Manual page 2

Read Me First
I fully realize that many, if not all, owners will rush to hook up the amplifier
without reading this operating manual. I don't blame you – I don't read them
either. However, this amplifier is different in a number of ways, and if you only
read this page you will probably save us both some time and trouble.
Heat and Ventilation - This amplifier consumes 200 watts all the time and
converts it into heat. Pick a location where the amplifier can get some fresh air
and blow off the heat. Do not enclose the amplifier in a closed cabinet. Don't
set it on the carpet. Give it lots of space.
Input Connection and Input Impedance - The SIT-2 takes single-ended
(RCA) inputs. The input impedance is selectable between 10 Kohms and 100
Kohms by gold jumpers which plug into XLR connectors near the RCA inputs:
I suggest you start with the default 100K setting which will work with anything.
Later you may wish to try driving the Gate terminal of the SIT device more
directly by removing the gold jumper and inserting it in the "10K" input position
as shown. If you are running a low source impedance, you won't find much
difference (at least I don't), but you can enjoy the concept of running through the
absolute minimum of circuitry. In either case, use whatever sounds best to you.
– The XLR panel connector is not an input connector –
Output Connection - You can hook this amplifier up to any loudspeaker without
danger of damage. Note, however that the (+) Red output connection is actually
grounded. The (-) Black output terminal is the live connection. This can be
important when you are hooking up active subwoofers to the output of the amp –
treat the Red output as ground, and the Black as active.
Warmup - The SIT-2 takes a while to fully warm up. During this time you can
listen to it, but you will find that the initial operating point will drift a bit and will
require some readjustment.
OK! You can go play now.