Meyer Sound UMS-1P User Manual

DAT A S HEE T

17.51"

[445 mm]

22.75"

[578 mm]

8.51"

[216 mm]

8.00"

[203 mm]

8.17"

[208 mm]

16.30"

[414 mm]

UMS-1P : Ultra-Compact Subwoofer

ULT R A SER I E S

An extremely compact, self-powered sys­tem, the UMS-1P ultra-compact subwoofer
provides powerful low-frequency exten
sion in applications where both excellent
audio quality and an unobtrusive cabinet
size are required. The system’s output is
127 dB peak SPL within its operating range
of 25 Hz to 160 Hz. Although designed pri
marily as a companion for Meyer Sound’s
UPM-1P wide coverage and UPM-2P narrow
coverage ultra-compact loudspeakers, the
UMS-1P is equally adaptable for use with
other Meyer Sound models such as the HD-1
high-definition studio monitor. The UMS-1P
may be used singly or stacked to provide
even greater low-frequency output.

The tuned bass-reflex enclosure houses
two 10-inch cone drivers, each powered
by a dedicated channel of an integral class
AB/bridged power amplifier with comple
mentary MOSFET output stages. Total peak
power is 450 watts. Each channel incor
porates a limiter that prevents driver over­excursion and regulates the voice coil tem

perature. A smooth limiting characteristic
effectively protects the drivers without the

-

compression effects imposed by typical
limiters, allowing high output levels across
the drivers’ entire frequency range.

The internal electronics also provide active

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signal processing, including phase correc
tion circuitry that delivers flat frequency
and phase response over the entire oper
ating range. Integrating a built-in low-pass
crossover while accepting a full-range sig
nal, the UMS-1P’s input allows for simple
daisy-chain signal distribution and elimi
nates the need for external crossovers.

Field-replaceable audio input modules ac
commodate a range of applications. The
standard version offers looping XLR input
and output connectors, while an enhanced

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looping version adds polarity switching
(the looping output is not affected) and

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input attenuation (0 dB to -18 dB). A sum
ming mono version with two inputs is also
available.

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Dimensions

Weight

Enclosure

Finish

Protective Grille

22.75" w x 16.30" h x 17.51" d (16" without grille)
(578 mm x 414 mm x 445 mm; 406 mm without grille)
62 lbs (28.10 kg)
Premium birch plywood
Black textured (other options available)
Powder-coated hex-stamped steel, foam covering

The standard UMS-1P is switchable between
the 115 V AC and 230 V AC ranges. A 100
V AC version is also available. The inte
gral power supply suppresses high-voltage
transients and also provides EMI filtering.
Dual locking PowerCon connectors facili
tate AC looping.

­The UMS-1P’s durable enclosure is con

-

structed from premium birch plywood and
is covered with a black textured hard-shell

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finish. A hex-stamped steel grille and a
charcoal grey foam cover are included. A

-

pole mount for supporting a UPM-1P or
UPM-2P is fitted as standard. Options in
clude custom color finishes, and cabinets

-

with no handles for fixed applications re
quiring specific cosmetics.

The UMS-1P is compatible with the RMS™
remote monitoring system, which offers
comprehensive monitoring of system pa

-

rameters on a Windows

®

-based network.

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-

-

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features & benefits

Powerful, extended low-frequency
response in a very compact cabinet

Linear driver excursion ensures
exceptionally clean bass response with
very low distortion

Adaptable to complement the UPM and
HD-1 systems

Flat, phase-corrected response ensures
maximum fidelity

applications

Mix suites

Small theatre and audio-visual

Houses of worship

UMS-1P specifications

European Office:
Meyer Sound Lab. GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany

Made by Meyer Sound Laboratories
Berkeley,California USA

Acoustical

Operating Frequency Range

Frequency Response

Maximum Peak SPL

Coverage

Transducers

Audio Input

Maximum Common Mode Range

Nominal Input Sensitivity

Amplifier

AC Power

Operating Voltage Ranges

Max Long-Term Continuous Current (>10 sec)

Burst Current (<1 sec)

Ultimate Short-Term Peak Current Draw

RMS Network (Optional)

Phase Response

Dynamic Range

Low Frequency

Type

Connectors

Input Impedance

Wiring

DC Blocking

CMRR

RF Filter

TIM Filter

Input Level

Type

Output Power

THD, IM, TIM

Load Capacity

Cooling

Connector

Voltage Selection

Current Draw

Idle Current

Inrush Current

1

25 Hz - 160 Hz

2

29 Hz - 135 Hz ±4 dB
41 Hz - 155 Hz ±30°

3

127 dB
>110 dB

360° single unit; varies for multiple units, depending on number and
configuration

Two 10" cone drivers
Nominal impedance: 4 Ω
Voice coil size: 2"
Power-handling capability: 400 W

4

Differential, electronically balanced
±15 V DC, clamped to earth for voltage transient protection
Female XLR input with male XLR loop output
10 kΩ differential between pin 2 & 3
Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to
provide virtual ground lift at audiofrequencies
Pin 2: Signal +
Pin 3: Signal - (optional polarity reversal switch)5
Case: Earth ground and chassis
Differential DC blocking up to max common mode voltage
>50 dB, Typically 80 dB (50 Hz - 500 Hz)
Common Mode: 425 kHz; Differential Mode: 142 kHz
<80 kHz, integral to signal processing
0 dBV (1 V rms, 1.4 V pk) continuous is typically the onset of limiting
for pink noise and music
Audio source must be capable of producing a minimum of +20 dBV
(10 V rms, 14 V pk) into 600 Ω in order to produce maximum peak
SPL over the operating bandwidth of the loudspeaker

Two-channel complementary MOSFET output stages (class AB/
bridged)

6

450 W total
<.02 %
4 Ω both channels
Convection

PowerCon with looping output
External 115/230 V AC switch (100 V AC version available)
105 V AC - 130 V AC (115 V AC); 210 V AC - 260 V AC (230 V AC)

9:

.0.13 A rms (115 V AC); 0.065 A rms (230 V AC); 0.15 A rms (100 V AC)
1 A rms (115 V AC); 0.5 A rms (230 V AC); 1.2 A rms (100 V AC)

1.3 A rms (115 V AC); 0.65 A rms (230 V AC); 1.5 A rms (100 V AC)

2.9 A pk (115 V AC); 2 A pk (230 V AC); 3.3 A pk (100 V AC)
18 A pk (115 V AC); 12 A pk (230 V AC); 15 A pk (100 V AC)

Equipped for two-conductor, twisted-pair network, reporting
amplifier operating parameters to system operator’s host computer.

Notes:

1. Recommended maximum operating
frequency range. Response depends on
loading conditions and room acoustics.

2. Free field, measured with 1/3-octave
frequency resolution at 4 meters.

3. Measured with music at 1 meter.

4. Power handling is measured under AES
standard conditions: transducer driven
continuously for two hours with band­limited noise signal having a
6 dB peak-average ratio.

5. Two additional input module options
are available with a polarity reversal
switch and an attenuator (0 dB to

-18 dB): one looping and one with two
inputs for mono summing.

6. Amplifier wattage rating based on the
maximum unclipped burst sine-wave
rms voltage the amplifier will produce
into the nominal load impedance. Each
channel 30 V rms (42 V pk) into 4 ohms.

7. 100 V AC version, range 90 - 100 V AC;
recommended maximum 115 V AC.

8. Fuse-protected above 135 V AC (115 V
AC switch position) and 265 V AC (230
V AC switch position).

9. Current drawing for a single
loudspeaker. Loop out not used.

7

8

UMS-1 P - 04.086.010.01 B

Copyright © 2005
Meyer Sound Laboratories Inc.
All rights reserved

meyer sound laboratories inc.

2832 San Pablo Avenue
Berkeley, CA 94702

T: +1 510 486.1166
F: +1 510 486.8356

[e-mail]
www.meyersound.com

architect specifications

The loudspeaker shall be a self-powered, sub-bass system able
to be used singly or ground-stacked in multiples. The transducers
shall consist of two 10-inch cone drivers with 2-inch voice coils,
each rated to handle 400 AES* watts.

The loudspeaker shall incorporate internal processing electron­ics and a two-channel amplifier. Each amplifier channel shall be
class AB/bridged with complementary MOSFET output stages.
Burst capability shall be 450 watts total with a nominal resistive
load of 4 ohms both channels. Distortion (THD, IM, TIM) shall not
exceed 0.02%.

Performance specifications for a typical production unit shall
be as follows: Operating frequency range shall be 25 Hz to 160
Hz. Phase response shall be ±30 degrees from 41 Hz to 155 Hz.
Maximum peak SPL shall be 127 dB at 1 meter. Beamwidth shall be
360 degrees for a single unit. Directional characteristics can be
achieved with multiple cabinets.

The audio input shall be electronically balanced with a 10 kOhm
impedance and accept a nominal 0 dBV (1 V rms, 1.4 V pk) signal
(+20 dBV to produce maximum peak SPL). Connectors shall be
XLR (A-3) type male and female. RF filtering shall be provided.
CMRR shall be greater than 50 dB (typically 80 dB, 50 Hz to 500
Hz). Two additional input module options shall be offered with
an attenuator and polarity reversal switch; one with loop-through
output, and another with two summing inputs instead of the loop­through input and output.

Two versions of the loudspeaker shall be available: a switchable
115/230 V and a non-switchable 100 V version. The voltage
selection needs to be manually selected. The internal power
supply shall perform EMI filtering, soft current turn-on and surge
suppression. Powering requirements shall be nominal 100 (100 V
version) and 110 or 230 V AC (115/230 version) line current at 50
or 60 Hz. UL and CE operating voltage range shall be 115 V AC

- 240 V AC. Ultimate short-term peak current draw shall be 2.9

A at 115 V AC, 2 A at 230 V AC and 3.3 A at 100 V AC. Current
inrush during turn-on shall not exceed 18 A at 115 V AC. AC
power connectors shall be PowerCon with looping output. The
loudspeaker system shall provide facilities for installing the
optional RMS remote monitoring system.

All loudspeaker components shall be mounted in an acoustically
vented rectangular enclosure constructed of premium birch
plywood with a black textured finish. The front protective
grille shall be powder-coated hex-stamped steel covered by
charcoal-gray foam. Dimensions shall be 22.75" wide x 16.30"
high x 17.51" deep (16" without grille) (578 mm x 414 mm x 445
mm; 406 mm without grille). Weight shall be 62 lbs (28.10 kg).
A pole mount for supporting a UPM-1P or UPM-2P shall be
fitted as standard.

The loudspeaker shall be the Meyer Sound UMS-1P.

*Driven continuously for two hours with band-limited noise
signal having a 6 dB peak-average ratio.