The other evening at Fastback we hosted an engineering networking night with new equipment to reviews. One of the items we tested was a Korby KAT47 tube Microphone. We tested the KAT47 against four other like microphones of the same quality.
KAT47 Pros: Comes with extra tube, 9-pattern power supply is sweepable for different pattern blends, 4 hot swapable heads - Neumann U67 & U47 - AKG C12 & 251. Shock mount has two sturdy holding bands to keep the mic in place, heavy duty flight case.
KAT47 Cons: Price $5,000, includes one head. U47 capsule is not as dynamic as the other mic we tested it against, as we only tested one capsule. We had eight engineers/producers from other Seattle studios, all commented that it would not stand out in the mix or not an impressive mic for the money.
Test Standard: All mics where placed on the cardiod pattern, male & female singing, 1st test through a Focusrite ISA 428 mic-pre and the 2nd test through a Neve custom made channel strip “lunchbox”.
Test 1: Korby KAT47 Vs. Manley Reference Gold. The Manley was also a darker sounding mic like the KAT47 but Manley had just a bit more high end. Cost of KAT47, twice as much as a Manley.
Test 2: Korby KAT47 Vs. Telefunken M16. Night and day The M16 with a refurbished AKG C12 tone stood out in the test with a lot more presence and clarity. Cost of KAT47, four times as much as a Telefunken M16
Test 3: Korby KAT47 Vs. Neumann U87. The U87 is a studio pillar we almost put the KAT47 away after A/B’ing them. The U87 was standing ontop while the KAT47 sounded like a distant buried vocal mic. Cost of KAT47, twice as much as a Neumann U87.
Test 4: Korby KAT47 Vs. Blue Bottle with a B-6 vocal head. This mic was also more transparent than the KAT47 similar in presence to the U87 the KAT47 sounded dull in comparison. Both mics are equal in price range.