Introduction
The UA Bock 187 microphone continues Universal Audio’s proud tradition of timeless
craftsmanship. Lovingly handbuilt at the UA Custom Shop in Santa Cruz, California,
your new microphone is designed to deliver uncompromising quality and a lifetime
of musical inspiration.
This microphone is a phantom powered large-diaphragm condenser, with a cardioid polar
response pattern. Featuring a FET amplifier and fully transformer balanced audio output,
it provides remarkable fullness and presence with exceptionally low background noise.
Designed and engineered by David Bock, UA Bock 187 features a larger transformer and
more refined bias circuitry versus a vintage U87. This results in higher dynamic
range in the low frequencies, as well as more natural guitar and vocal capture.
Before using this unit, be sure to carefully read the applicable items of
these operating instructions and the safety suggestions. Afterwards,
keep them for future reference. Take care to follow the warnings
indicated on the unit, as well as in the operating instructions.
Important Safety Instructions:
Read and follow all instructions; Heed all warnings; Keep these
instructions.
Do not use this apparatus near water.
Clean only with dry cloth.
Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
Do not install near any heat source such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the other.
Safety
UA Bock 187 Specifications
Polar Pattern
Cardioid
Frequency Range
20 Hz — 16 kHz, ±2 dB
Sensitivity
-42 dB (8 mV) ref 1V at 1 Pa, 1 kHz
Self-Noise
12 dBA
Distortion vs SPL @ 1 kHz
(Increasing distortion is non-
exponential, nearly linear, and
primarily 2nd harmonic)
122 dB = 0.5% THD
125 dB = 1% THD
129 dB = 2% THD
Universal Audio, Inc.
4585 Scotts Valley Drive, Scotts Valley, CA 95066
www.uaudio.com
Getting Started
Get Apollo Interface Presets
Place the UA Bock 187 microphone in its included mount on a stable mic stand. As a
best practice, mute the input channel and disable phantom power at its source before
connecting or disconnecting the mic.
The MODE switch offers either “normal” response or a unique “fat” mode that provides
a gentle low mid/bass EQ boost for a warmer sound.
This microphone is very sensitive to frequencies below 20 Hz, especially when fat mode
is active. Engage the LOCUT switch to reduce unwanted low frequency noise.
For high SPL sources like drums and amplified guitars, the microphone features a -10 dB
PAD with voltage divider circuitry, delivering superior transparency versus more
common capacitive pads.
For customer support, visit help.uaudio.com
UA Bock 187 comes with convenient Apollo Channel Strip Presets.
These downloadable settings for UA’s Apollo audio interfaces give you
professional results on a wide range of sources, instantly.
To get your presets, download UA Connect by scanning the QR code
or visit uaudio.com/mics/presets
Output Impedance
200 Ohms
Recommended Load Impedance
> 2K Ohms
Maximum SPL
125 dB SPL, 1% THD
Dynamic Range
113 dB
Signal-to-Noise Ratio
82 dB
Capsule
1”diameter
Dual symmetrical backplate
Dual diaphragm K67 type
Phantom Power Requirements
48 VDC, 0.5 mA
Adjustable Controls
PAD (-10 dB): off, on
MODE (bass contour): fat, norm
LOCUT (120 Hz rumble): off, on
Output Connector
3-Pin XLRM
Dimensions
7.7” (195mm) length
2” (50 mm) diameter
Microphone Weight
1.6 lbs (725 g)
Shipping Weight
2 lbs (907 g)
Safety Standards
UL 62368-2
EN 62368-1
Used electrical and electronic equipment should not be mixed
with general household waste. Please dispose in accordance
with local regulations.
Hazardous voltage enclosed. Do not open, will cause shock
or burn. If servicing is needed, disconnect power and contact
Universal Audio customer support.
Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit
from the apparatus.
Only use with attachments/accessories specified by the manufacturer.
Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as 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.
