USER MANUAL
page 12
Figure 8: Using an RTA to meaure the summed response
Inputs on your LC8i. Make sure to get your “pluses” and “minuses”
connected properly.
Pre-Amp Outputs
Connect good quality RCA connectors from these outputs to the inputs
of your ampliers. While we won’t get into the discussion as to whether
plutonium cables sound better than un-obtainium cables. We will tell you
that well-constructed cables are less problematic in rugged environment
like your car system.
Summing The Outputs
Under the cover are connection jumpers that allow the Main outputs
of the LC8i to receive signals from the inputs of Channels 2, 3, and/or 4.
These jumpers allow you to select which input signals will be summed
into the Main output. When one of the jumpers is in the Summed posi-
tion, the corresponding green indicator light on the front of the LC8i will
be lit up. The shipped-from-the-factory setting is in the non-summed
(Separate) position.
When you have summed several channels together, you will want to
make sure the output levels are providing a balanced frequency response.
A simple technique involves using a pink noise cd and a real time audio
analyzer (AudioControl happens to make a great one!)
1) Perform all of the steps necessary to install your LC8i.
2) Connect a channel of the Main Outputs from your LC8i to the audio
input on your real time analyzer. “Yes” your ampliers will be discon-
nected from the LC8i at this time.
3) Start playing pink noise on your cd player and raise the volume level
until signal is displayed on your real time audio analyzer (RTA).
4) Adjust the input level controls for each pair of channels until your