JED T441 2-Channel Stereo Audio Controller

Product Description

* Requires 12V DC

The T441 is a small boxed audio attenuator/mixer which switches and controls line-level audio in a small A/V room installation. It is powered from the same 12 volt adaptor which runs T440's etc.

It has two main modes and an auxiliary mode of operation: A DIP switch on the end selects modes:

In stereo mode, there are two stereo input pairs which are typically a computer stereo pair and an A/V stereo pair from a DVD/VCR, (although this can be selected via an option switch to be both computer sources, both with stereo audio). These are switched to an RCA pair on the back to feed into the room PA system. The default setup in a T440 selects these audio channels automatically for, say, Code:0, 9 or A keyboards; or

In mono mode, the four RCA inputs are regarded as separate line inputs, which could be from two computers in mono and two A/V signals each in mono. These are switched to one of the rear RCA connectors to the room mono PA. This is used if T440, OPT4 is set and one needs to select between, and control, 4 audio channels;

In the third mode, the first RCA input pair is regarded as two mono channels, and are used for two computer channels selected by T440 Computer:1 and Computer:2 respectively. The other (stereo) input is selected by Video:1 and is passed in stereo to the two outputs. (At the moment, if this mode is to be used, it needs to be ordered as a "Mode 3" T441:The next PCB rev will use switches to select it. This mode came as an unintended bonus!)

Note: The T441 is code compatible with the T461, so the T460 can drive it too, if an application only needs two stereo/four mono channels.

The RS232 codes are available, so it can be driven from foreign controllers with an RS232 port. The T441 is code compatible with the T461, and is just simple ASCII strings 7 characters long.