UA Bock 167 Specifications
Safety
Polar Pattern
(via power supply) Continuously
variable Omnidirectional through
Cardioid and Figure-8
Frequency Range
10 Hz — 18 kHz, ±2 dB
Sensitivity
-29 dB (33 mV) ref 1V at 1 Pa, 1 kHz
Self-Noise
19 dBA
Distortion vs SPL @ 1 kHz
(Increasing distortion is non-
exponential, nearly linear, and
primarily 2nd harmonic)
112 dB = 0.5% THD
118 dB = 1% THD
129 dB = 2% THD
Impedance
200 Ohms
Recommended Load Impedance
> 2K Ohms
Maximum SPL
118 dB SPL, 1% THD
Dynamic Range
99 dB
Connectors
6-pin XLR (mic)
3-pin XLRM (power supply)
Dimensions
9” (228 mm) length
2” (50 mm) diameter
Microphone Weight
1.58 lbs (716 g)
Universal Audio, Inc.
4585 Scotts Valley Drive, Scotts Valley, CA 95066
www.uaudio.com
Introduction
Getting Started
Get Apollo Interface Presets
The UA Bock 167 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 high-quality large-diaphragm condenser with vacuum tube
electronics and continuously variable directivity. Featuring a dual membrane
K67 capsule and a large core output transformer to dramatically increase low
frequency response and headroom, the UA Bock 167 sounds rich and full.
Designed and engineered by David Bock, the UA Bock 167 provides a wider
range of controls versus a vintage U67. This makes it a natural choice for
singers, acoustic instruments, drums, and voiceovers.
Place the UA Bock 167 microphone in its included shockmount on a stable mic stand.
Connect the power supply to AC, then connect the included six-pin XLR cable from
power supply to microphone. Note: The power supply should be powered off
before connecting or disconnecting the microphone. After switching on the power
supply, allow the tube several minutes to warm up before use.
The Bock 167’s polar response pattern is adjusted by the continuously variable
remote control on the power supply. Rotate the control fully counterclockwise for
omni response, or fully clockwise for figure-8 response. Set the control to noon
(straight up) for cardioid polar response.
Any combination of mic switch settings may be used for tonal shaping. 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. The HIGH FREQUENCY switch offers four
filtering options for tone shaping. From left: -3 dB of shelving cut at 10 kHz, -1.5 dB
shelving cut at 5 kHz, flat, and an additional +2 dB shelving boost at 10 kHz. If needed,
engage the -10 dB PAD on high SPL sources like drums and amplified guitars.
For customer support, visit help.uaudio.com
PAD (-10 dB)
HIGH FREQUENCY
MODE
Off, On
Cut (-1.5 dB @5 kHz)
Cut (-3 dB @10 kHz)
Flat
Boost (+2 dB @10 kHz)
Fat, Normal
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Case
Audio (-)
Audio (+)
Pattern
Heater (5VDC)
B+ (130VDC)
Ground
Shield
Signal-to-Noise Ratio
75 dB
Capsule
1” diameter
Dual symmetrical backplate
Dual diaphragm K67 type
Tube
New Old Stock EF732
Adjustable Controls
Shipping Weight
12 lbs (5.4 kg)
Safety Standards
UL 62368-2 EN 62368-1
Microphone input power:
From UA BOCK 167 PSU
Power Supply
UA Bock 167 PSU
Input: 100VAC
115VAC
230VAC
Output: 130VDC @ 0.75mA,
5VDC @ 132mA
Maximum operating temperature 40°C
Power Rating = 8.2W
Power Supply Pinouts
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.
Only use with attachments/accessories specified by the manufacturer.
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.
Protect the power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
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.
For the UA Bock 167 Power Supply Guide, visit help.uaudio.com
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.
UA BOCK 167 does not contain a fuse or any other user-replaceable parts.
UA Bock 167 comes with Apollo Channel Strip Presets. These downloadable
settings for UA’s Apollo audio interfacesgive youprofessionalresults ona
wide range ofsources, instantly. To get your presets, download UA Connect
by scanning the QR code or visit uaudio.com/mics/presets
