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Groove Tubes GT55Cardioid Condenser Microphone (Class A Fet) Product Condition
Nice clean condition , slight cosmetic marks, unit has been tested and working by a friend of mine who uses these things on a daily basis
Product Description
The GT55 was an early FET condenser from Groove Tubes, replaced in the lineup in early 2006 by the GT50, which appears to have been identical save for the exterior metalwork.The GT55, like all the companys LDCs, uses a 3-micron, 33mm K67-type capsule with a disk resonator attached to the centre termination screw to increase high-frequency response. In the GT55, this capsule has a non- metallized rear diaphragm.The mic has very high sensitivity of 32mV/Pa, making the onboard -10dB pad likely very useful for capturing medium- to loud sources. A second switch on the mic body enables a high-pass filter.The GT55 has a fixed Cardioid pickup pattern. The capsule bias voltage on a sample mic was measured to be 38VDC.The grille is made of 2-layer metal mesh. In the sample weve seen, the inner layer is loose, not soldered to the chassis.It was introduced sometime around 2001-2002 at $599. The MSRP dipped as low as $399 over the mics ~4-year lifetime, when distributed by M-Audio.Although the cut-sheet claims a max diameter of 2.5”, we suspect this was a typo; the body diameter is more likely ~46mm (1.8 inches).
Pro-Audio Review 2003
This 3-micron evaporated gold diaphragm with Disk Resonator technology provides amazing sensitivity that delivers a sparkling, transparent sound across the full frequency spectrum Large-diaphragm microphones often get bogged down resonating at low frequencies, preventing them from efficiently reproducing frequencies above 1415 kHz. Groove Tubes Disk Resonator interacts at high frequencies with part of the diaphragm, extending the range of the capsule well beyond 20 kHz.
Included In Sale
1x Groove Tubes GT55 Cardioid Condenser Microphone
_gsrx_vers_783 (GS 7.0.5 (783))
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