UNITED UT Twin87 Large Diaphragm Condenser Microphone Owner’s Manual
- June 4, 2024
- UNITED
Table of Contents
TWIN CIRCUIT LARGE DIAPHRAGM CONDENSER MICROPHONE
Owner’s Manual
REGISTER YOUR PRODUCT
Before we begin, please take the time to visit www.unitedstudiotech.com to register your product. To ensure you receive proper and uninterrupted warranty support for your product, please register your unit within 14 days from purchase.
IMPORTANT SAFETY INSTRUCTIONS
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Read these instructions
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Keep these instructions
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Heed all warnings
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Follow all instructions
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Clean only with a dry cloth
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Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions
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Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat
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Protect the power cord from being walked on or pinched particularly at plugs and the point where they exit from the apparatus
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Only use attachments/accessories specified by the manufacturer
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Unplug this apparatus during lightning storms or when unused for long periods of time
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Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as the power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped
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CAUTION: To disconnect the unit completely from the MAINS, unplug the unit. Turning the power switch off does not disconnect the unit completely from the MAINS.
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The unit shall not be exposed to dripping or splashing and that no objects filled with
liquids, such as vases, shall be placed on the unit. -
WARNING: This is a Class I apparatus. It should be connected to a MAINS socket outlet with a protective earthing connection.
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This equipment design typically applies to commercial or industrial equipment expected to be installed in locations where only adults are normally present.
WARRANTY STATEMENT
United warranties this product to be free from defects in materials and
workmanship for one year from the date of purchase, for the original purchaser
to whom this equipment is registered. This warranty is non-transferable.
This warranty is void in the event of damage incurred from unauthorized
service to this unit, or from electrical or mechanical modification to this
unit. This warranty does not cover damage resulting from abuse, accidental
damage, misuse, improper electrical conditions such as mis-wiring, incorrect
voltage or frequency, unstable power, disconnection from earth ground (for
products requiring a 3-pin, grounded power cable), or from exposure to hostile
environmental conditions such as moisture, humidity, smoke, fire, sand and
other debris, and extreme temperatures.
United will, at it’s sole discretion, repair or replace this product in a
timely manner. This limited warranty extends only to products determined to be
defective and does not cover incidental costs such as equipment rental, loss
of revenue, etc. Please visit us at
www.unitedstudiotech.com for more
information on your warranty, or to request warranty service.
This warranty applies to products sold in the United States of America. For
warranty information in any other country, please refer to your local
distributor for United Studio Technologies. This warranty provides specific
legal rights, which may vary from state to state. Depending on the state in
which you live, you may have rights in addition to those covered in this
statement. Please refer to your state laws or see your local retailer for more
information.
CONNECTIONS AND POWER
The UT Twin87 requires 2 things in order to properly function: a 3-pin XLR cable, and 48V phantom power. Engage 48V phantom power on your device. If your device does not provide 48V phantom power, an external, dedicated power supply will be required for operation.
HARDWARE CONTROLS
Pattern select – omnidirectional, cardioid, and figure of eight.
HPF – gradual slope rumble filter tuned for voice broadcast, 12 dB down at
80hZ Modern/Vintage – This switch allows the user a choice between the
earliest 87-style circuit and the more modern reproductions. -10dB pad –
attenuates amplifier section by 10dB to provide greater headroom for loud
sources.
Using the Vintage/Modern Modes.
When Vintage/Modern modes are changed, the UT Twin87 will require roughly 10
seconds to morph between sounds. This is normal in all operations,
as the circuitry makes significant configuration changes in order to replicate
both variations in extreme detail.
The modern setting yields a slightly hotter, brighter, more articulate sound,
while the vintage setting offers a slightly warmer, softer, and smoother tone.
Engaging the RF Filter.
To access the filter dip switch, unscrew the bottom bell counterclockwise from
the base of the microphone, then gently slide out the brass body tube. The RF
filter should be engaged when used in radio broadcasting, or when radio
interference is an issue. The UT Twin87 ships with the RF filter is engaged by
default. To engage the filter, lower switch positions 1 and 5, and raise
switch positions 2, 3, and 4 (see Fig. 1). To bypass the RF filter, raise
switch positions 1 and 5, while lowering positions 2, 3, and 4 (see Fig. 2).
Switch position 6 should always be lowered.
TECHNICAL SPECIFICATIONS
Type | Condenser Microphone |
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Diaphragm | Dual-diaphragm, 6 microns, 24k gold sputtered Mylar (PET film) |
Capsule | UT Series, 34mm brass, insulated dual backplate K87 |
Power Supply | +48v Phantom Power (via XLR) |
Ground | Pin 1 XLR (required) |
Frequency Response | 20 Hz – 20 kHz |
SPL | 117dB (no pad), 127dB (with pad) @ .5% THD |
Polar Pattern | Cardioid, Figure 8, Omni |
Output Impedance | 27 Ω |
Amplifier Type | Field Effect Transistor |
Self Noise | <10dB (cardioid setting, no pad, no HPF) |
Output | Custom-wound UT Series transformer, made in USA |
Body | Nickel electroplated, solid-milled brass |
High Pass Filter | 80hZ (12dB down point) |
Pad | -10dB |
Connector | 24k gold plated XLR, pin 2 HOT, pin 1 GND |
Mount | Suspension-type shock mount (included) |
Dimensions | Height: 220mm / 8.6″ |
Diameter: 55mm / 2.2″
Shockmount Depth: 190mm / 7.5″
As a commitment to constant improvement, United reserves the right to change any specifications, at any time, without notification.
GET THE FULL STORY
Get the history of the product, tips and tricks, and more by downloading our
full manual at www.unitedstudiotech.com. As
part of our green initiative, we have chosen to include this short-scale
manual to reduce paper waste.