They won't communicate with the Theta per se, but the Ayre amp can be sent a normal trigger voltage (+5 to +12 VDC) as a trigger with an appropriately wired cable:
Here's what Ayre has to say about trigger inputs in the MX-R manual:
Quote:
A trigger control allows one component to control the “Standby” state of another component. If there are no other AyreLink components to control the operation of the MX-R amplifier, it may be convenient to use the trigger control from another component.
The trigger will directly control one MX-R amplifier. Additional amplifiers are in turn controlled by the AyreLink communications system. Connect the AyreLink ports of your amplifiers in daisy-chain fashion as described in the chapter “Connections and Installation”. The unused AyreLink port on an amplifier at either end of the AyreLink chain is then used as a trigger input.
An adapter cable must be fabricated to connect the trigger output of the control component to the AyreLink port of the MX-R amplifier. The easiest way to do this is to remove the modular (RJ-11) connector from one end of a two-line telephone line cord. (This is the type of cord that connects the telephone set to the wall. A two-line cord will have four gold contacts on each connector.) Then attach the connector appropriate for the component with the trigger output. Please refer to the owner’s manual of that component for details.
The trigger voltage should be between +5 and +12 volts DC for proper operation. The current draw of the trigger input on the AyreLink port is less than 5 mA.
There are two signaling methods that may be used; level and pulse. The MX-R automatically senses which type of trigger signal is being sent and responds accordingly.
A positive-going pulse of greater than 250 msec is treated as a level-sensitive trigger. Shorter pulses are treated as a pulse-sensitive trigger. The minimum detectable pulse length is 50 μsec.
During level-sensitive operation, applying a voltage to the trigger input will set the amplifier to the “Operate” mode. When the applied voltage drops to zero, the unit reverts to
“Standby”.
In the pulse-sensitive mode, a positive-going pulse will toggle the amplifier between the “Standby” and “Operate” states, duplicating the action of the front-panel button.
The front-panel button remains operative when the trigger input is used. Therefore, using the front-panel button will put the amplifier out of “sync” with the trigger control device. When used with level-sensitive trigger operation, the next trigger action will automatically restore “sync”. However when using pulse-sensitive trigger operation, “sync” can only be restored by pressing the front-panel button a second time.
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As mentioned above, you need to be
very careful about wiring the trigger cable; voltages applied to the ground or other pins of the connector may cause serious damage to the amplifier's control circuitry that will make it
unusable until repaired.
You also need to make absolutely sure AyreLink cables used between amps are two-line phone cables wired to preserve polarity - where when pointed the same direction the color wires in one modular connector are a mirror image of the other - or, once again, serious damage to the amplifier's control circuitry will occur that will make it
unusable until repaired.
Proper two-line phone cable wiring for use as an AyreLink cable:
