We had an "amp try out fest" one Sunday a while back at friends house that had a pair of JBL Synthesis 1400 Array's,**Any** 60 watt OTL will be uncomfortable with a load like that (see JA's comments in the review at the link). This is a great example of how *not* to do it- you always want a tube amp to play loads for which it is intended!
https://www.stereophile.com/content/jbl-synthesis-1400-array-bg-loudspeaker-measurements
His mate came over also with his OTL 60watters
By the way what are the woofer's in your speakers? Are your enclosures vented?Yes. The drivers are dual TAD 1602s (Fo of 21Hz), one forward firing and the other downfiring. Flat to 20Hz is no problem at all :)
how to match a tube amp to a speaker, is one to find what the lowest dip in the speaker measurement and make sure the amp can over come that dip rather easily ?@oem-wheels In a nutshell, yes.