morganc
I have built X-Voce with and without upgrades. It's a great speaker, one of my favorites. I think it should be exponentially more popular than it is, but most people don't have the layout to accommodate 4x 6.5" woofers in center channel.
I'm not sure your budget, but this can be an expensive one to upgrade if you are upgrading inductors and replacing capacitors.
On a budget:
Mills resistors- 1 each on tweeter and mid circuits. Higher up the cost ladder would be Path Audio or maybe Deuland cast. Mundorf also has a new premium resistor.
Premium bypass caps- 2 on tweeter, 1 on the inline cap for mid circuit. Myflex copper is a great choice under $25. Higher cost would be Deuland bypass or ODAM.
Done.
Of course sky is the limit for upgrades, if you really want to throw money at it. This one can get expensive if you are replacing caps and inductors. The 2 caps on tweeter and 1 inline on mid circuit are medium to large values and can get very expensive if swapping to exotic caps. For that reason, settling for bypass caps only is a very reasonable choice for this design. Similarly, there are 2 inline inductors in the mid circuit. Replacing both with premium foils can add significant cost. Upgrading to a 14 gauge air core instead of foils can often be cheaper than foils of same 16ga. Actually the baseline 16ga air core is a great starting point and should not be considered inferior in any way. Even if upgrading inductors, I'd still leave the tweeter inductor as original. 16ga is more than adequate for the tweeter, and any gains to be had from inductors would be limited to the mid circuit only.
Good luck and enjoy your project.
Feel free to email me directly. I'm willing to give some time in discussion if you want to discuss any specific upgrade strategies. Leave me a phone number and we can even discuss by phone if you prefer.
Elon
elon@ezeescrossovers.com
