Expanding the N-audio 8X7 Amp Cabinet Switcher beyond eight amplifiers is possible by stacking multiple units. Each additional 8X7 adds 7 amplifiers to the system, allowing it to grow with your collection. With nine 8X7 switchers, you can connect up to 64 amplifiers while using only 9U of rack space. The only limitation is that the speaker cabinets connected to the Master unit are shared by the entire system.
This method is not exclusive to N-audio switchers. It can also be used with other amp cabinet switchers that do not have dedicated expansion features. The following guide explains how to connect, configure, and control the complete system.
Preparation and Enabling the Amps
Use one Master Switcher and one or more Slave Switchers. Each Slave connects to one of the Master’s amplifier insert, as shown in the diagram. To set up the Slave units, press and hold the power attenuator button until it activates. This puts the Slaves in "silent recording" mode, allowing you to switch amplifiers without using cabinets.
Controlling amplifiers on the Master works as usual. First, select a cabinet, then pick an amp. For Slave units, start by selecting the amplifier on the Master where the Slave is connected. For instance, if a Slave Switcher is connected to Amp 8 on the Master, choose Amp 8 from the Master and then select the desired amp on the Slave.
As usual always test each amp at low volume to confirm proper wiring before increasing the volume.
The diagram below shows an example setup with two Slave units. This configuration expands the system to control up to 22 amplifiers, offering significant flexibility for larger setups.
View the full-size PDF wiring diagram
Controlling the System via MIDI
Each amp switcher needs to be set to a different MIDI channel. Once configured, send a sequence of MIDI messages: the first message selects the amp on the Master unit, and the second selects the amp on the Slave unit.
Conclusion
The N-audio 8X7 Amp Switcher provides impressive expandability for larger amp setups. While there are some limitations, many users have successfully expanded their systems and achieved excellent results. If you’re ready to try this setup or need assistance, don’t hesitate to contact me. I’m here to help!