Rare NOS Real Special Edition Telefunken CCa CV2493 DiamondGermany LayeredTone

Another phenomenal audiophile exclusive by caliacoustics! Rare hard to find authentic collectible special edition. (this tube is often relabeled by other sellers, theirs are not legitimate cca/cv2493 unfortunately and lack real marks). Revered for their detailed clear quiet presentation, telefunkens specialize in a smooth layered holographic sound stage.

Incredibly accurate natural mids w/ flat response, glassy not steril popular tuning choice for amps mics vocals +. E88cc are also known for their expansive mid bloom which highlight vocalists + instrumentals, and 1 0k hour lifetime.

This old production early'60s type has the most tube-era precious metallurgy = more accurate warmer sound reproduction. Audio grade phono ready w/ proprietary screening refurb process, grail ranked lowest distortion kingpin. Especially sought after for mono blocks and hifidelity applications including tube mics / phenomenal vocals. Pristine amplification test over 100 % mutual gm (65 % good) w/ balanced triodes and true nos clear micas.

Our unique gm output test applies 225 vdc simulating actual operations plus filtered dc + leak short gas life check. Simply put, higher gm = amplification capabilities via gain and bass response. Supplier double checked via funke w19 / tv7 / or roetest. While your bench results will vary... Circuit test = best test.

Plus full studio sound auditioned w/ closed back high resolution monitors and aira preamps. Give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (breakin is important). Authentic vintage hifidelity audio curation by caliacoustics.