Worst mismatches in equipment: your warnings

My current Atma-Sphere/Wilson combo. Whoops! How I missed the obvious impedance mismatch between the power amp and speakers is a cautionary tale for anyone putting together a system component by component. I was so focused on finding a great tube amp with a high input impedance for my passive linestage, that I completely forgot to think about matching impedance between the power amp and speakers. It wasn't until, about a day before the amp arrived, that I looked behind one of my WATTs and noticed the following text: "IMP. 4 OHMS". Doh! So the lesson learned is, remember to keep the entire system in mind when evaluating equipment for purchase.

Acoustic Zen Hologram speaker cables and Legacy Speakers.
Disaster.

BAT VK500 amplifier and Eminent Technology LFTVIIIa speakers are a great match, but do not use Zu WAX bi-wire speaker cables between the two. Congested, closed in, flat sound.. it was horrible. DH Labs Q10 proved to be a great cable.

Anything Bose will mismatch with your ears! Sdatch, that's one of the parameters of Atma-sphere amps...you should use a higher impedance speaker. However, I've heard from many that Paul Speltz's "Zero-former" will cure your mismatch and give you the sound that you are looking for.

Interesting response from Jeffloistarca, I also have the BAT Vk-500 with Alon V/Circe's and had a similar experience with Cardas Neutral Reference. Surprisingly the DH Labs Q-10 provide a cleaner, more open and more dynamic sound, only bettered by the NR in presenting midrange textures. I could not live with the overall boring, flat presentation of the Neutral Reference, no matter how smooth they are. Maybe the silver wires are more synergistic because the BAT is a bit dark sounding.