You can use an autoformer to double the impedeance of your circut. There are variuos manufacturers out there. Shoot me an email if you need help.
60th Anniversary Klipschorn; 50th Anniversary Bridge mono pair of Mcintosh MC-2000, C-1000C/C-1000T, MDA-1000, MS-300; ,Sigma Retro, M-2.2, AVS2000, HTPS7000; 5000VA BPT. Enough parts to build a pair of MCM Grand 4’s, if Roy would sell me a pair of unmounted K-150’s and K-402’s.