New Line of Groove Tubes Studio Mics ShippingPartnership with Midiman brings Aspen Pittman's studio mic designs back on the market April 12, 2002
Midiman has announced shipment of the new line of Groove Tubes microphones. This all-new
American-designed lineup of studio condensers features six different models differentiated by medium or
large diaphragm sizes, tube or FET circuitry, and single or multiple polar patterns.
These new Groove Tubes microphones have many factors that attribute to their vintage character. The entire
line employs solid brass capsules, as opposed to the injection-molded version that most manufacturers use
today to cut costs. Additionally, over 300 separate precision operations go into crafting each Groove Tubes
capsule alone---more than what goes into many finely crafted acoustic guitars (yet a diaphragm is about the
size of a coin). Ultra-thin evaporated gold diaphragms yield an extremely transparent sound. These
diaphragms are half as thin are the nearest competitor--3 microns on the large diaphragms, 6 microns on the
medium-sized diaphragms. (A human hair is about 40 microns).
All large-diaphragm Groove Tubes microphones incorporate the company's unique Disk Resonator
technology, delivering extended frequency response ideal for accurately capturing the realism of any sound
source. Large diaphragms typically get so bogged down resonating at low frequencies that they can't efficiently
reproduce higher frequencies starting around 14kHz on up. Groove Tubes' Disk Resonator interacts at high
frequencies with part of the diaphragm, extending the range of the capsule transparently through 20kHz and
beyond. Each mic is hand-assembled, hand-tested and measured against Groove Tubes' "golden reference
microphone". Every mic must measure within +/- 1db of the reference mic in order to pass inspection--a much
tighter spec than found on even the most famous European mics.
The enhanced designs and manufacturing techniques for the new Groove Tubes mic line also allow the
introduction of a new concept into the market--affordable matched pairs for stereo miking. Matched pairs from
most manufacturers have classically carried a surcharge and required special ordering--if available at all. Due
to inherently tight manufacturing tolerances, all Groove Tubes mics now ship in matched pairs--with no
penalty fees.
GT66 Studio Tube Condenser Microphone* -- Smooth bottom and full tone in a cardioid, ideal for capturing
and enhancing great vocals.
- Large all-brass capsule
- Single-pattern cardioid, side-address design
- 1.1" diameter, 3-micron evaporated gold diaphragm
- Full-frequency Disk Resonator technology
- Class A tube electronics
- -10db attenuation pad
- 75Hz low-frequency roll-off switch
GT67 Studio Tube Condenser Microphone -- Identical to the GT67 with the addition of multiple polar patterns
for ultimate flexibility in any recording situation.
- Large all-brass capsule
- Multipattern (cardioid, super-cardioid, omni, figure 8)
- Side-address design
- 1.1" diameter, 3-micron evaporated gold diaphragm
- Full-frequency Disk Resonator technology
- Class A tube electronics
- -10db attenuation pad
- 75Hz low-frequency roll-off switch
GT55 Studio FET Condenser Microphone* -- All of the features of the high-end cardioid GT66, with FET
circuitry replacing the tube for a great vocal and all-around instrument mic at a modest price.
- Large all-brass capsule
- Single-pattern cardioid
- Side-address design
- 1.1" diameter, 3-micron evaporated gold diaphragm
- Full-frequency Disk Resonator technology
- Class A FET electronics
- -10db attenuation pad
- 75Hz low-frequency roll-off switch
GT57 Studio FET Condenser Microphone -- All of the features of the high-end, multi-pattern GT67, with FET
circuitry replacing the tube for an excellent all-around large diaphragm microphone at a modest price.
- Large all-brass capsule
- Multipattern (cardioid, omni, figure 8)
- Side-address design
- 1.1" diameter, 3-micron evaporated gold diaphragm
- Full-frequency Disk Resonator technology
- Class A FET electronics
- -10db attenuation pad
- 75Hz low-frequency roll-off switch
GT44 Studio Tube Condenser Microphone--A no-compromise mid-sized tube mic ideal for instruments, as
well as vocals with reduced proximity effect--all at a great price. Also an industry favorite for drum overheads
and acoustic guitar.
- Medium-size all-brass capsule
- Top-address design
- Interchangeable capsules (cardioid standard; omni or super-cardioid optional)
- 3/4" diameter, 6-micron evaporated gold diaphragm
- Class A tube electronics
- -15db attenuation pad
- 75Hz low-frequency roll-off switch
GT33 Studio FET Condenser Microphone -- Incorporates all of the features of our popular GT44, with FET
circuitry replacing the tube for a great all-around mid-sized diaphragm microphone at a modest price.
- Medium-sized all-brass capsule
- Top-address design
- Interchangeable capsules (cardioid standard; omni or super-cardioid optional)
- 3/4" diameter, 6-micron evaporated gold diaphragm
- Class A FET electronics
- -15db attenuation pad
- 75Hz low-frequency roll-off switch
*U.S. Distribution available only through Guitar Center. For more information, visit their web site at www.groovetubes.com. | 
