Is Burmester 232 worth the price?

According to Perplexity, the upgraded 6 sn7 tubes are better than the stock 12sn7 if you prefer a warmer sound 

Everyone I’ve seen who upgraded to the better tubes was very happy so think you made the right choice there. 

You get your pick on output tubes you want to hear (tonal change) by selecting one over the other via a toggle switch on the rear of the LTA Aero DAC:

The LTA DAC Aero has a toggle switch on the back panel primarily for changing between 6SN7 and 12SN7 output tubes. 

This switch allows you to choose the correct heater voltage for either type of tube, as they have identical electrical characteristics but different voltage requirements. 

Important notes on using this switch:

• Only perform this operation while the Aero is turned off.
• Ensure the switch is set to the correct position for the tubes you are using to avoid potential over-current protection or other undesired behavior.