Meyer Sound UPM-1 User Manual

UPM-1

Features

Ultra-compact

Lightweight

Efficient high power

Versatile

Uncompromised quality

Even dispersion

Long-term reliability

Applications

Music playback in small clubs

Multi-channel AV playback
Side fill in live music clubs

Stage monitoring

Delayed fill in installations

Paging and announcing

Designed for sound reinforcement

—— 6

UltraSeries™
Reinforcement
Loudspeaker

applications requiring minimum size, the
UPM-1 delivers high sound pressure levels
with very low distortion and extremely even
coverage in both axes.

Suitable for a wide range of applica-tions
from music playback and delay fill systems
to stage monitoring, the UPM-1 features
outstanding low-frequency performance in
an unusually compact package. Its ultra­flat frequency response simplifies room
equalization requirements and ensures
high gain-before-feedback.

The loudspeaker consists of two 5-inch
low-frequency cone drivers in a vented
enclosure, and a 2 by 5-inch horn-loaded
piezoelectric high-frequency driver with
passive crossover.

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Inches

The rugged cabinet is easily handled

3

and installed. It has three

⁄8"-16 threaded
rigging points, and may be mounted on a
stand. An optional steel bracket facilitates
mounting in permanent installations.

The UPM-1 system requires a high­quality professional power amplifier cap­able of delivering 125 watts continuously
into 16 ohms, with a signal voltage gain
of 20 dB (minimum) to 30 dB (maximum).

Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
[phone]
FAX [phone]

UPM-1 Specifications

Acoustical – UPM-1/P-1A

Frequency Response

1

Half space 60-20,000 Hz +4 dB
Free air 70-20,000 Hz

Maximum SPL

2

+4 dB

Continuous 108 dB
Peak 118 dB

Distribution Pattern (-6dB points)

Horizontal 80 degrees
Vertical 60 degrees

UPM-1 Loudspeaker

Driver Complement

Low-Frequency (2) MS-5 5-inch cone drivers, 8 ohms per driver
High-Frequency 2" x 5" horn-loaded piezoelectric

Passive Network

Function 3-way crossover and HF driver protection
Capacitor Type Polypropylene

Inductor Type Ferrite core
Cabinet Impedance 16 ohms
Enclosure 0.2 cu. ft. vented, multi-ply Finnish birch
Finish Black textured
Connector Cannon EP-4 or 3-pin XLR (male and female)
Protective Grill Expanded metal screen frame, vinyl damped,

charcoal-grey foam covering
Mounting Points
Physical Dimensions 6

3

⁄8"-16 nut plates

3

⁄4" W x 181⁄8" H x 71⁄8" D

Weight 16 lbs. (7.3 kg)

P-1A Control Electronics Unit

Input Type Balanced (active), 47k ohms
Output Type Push-pull (active), 200 ohms source impedance
Maximum Input/Output Level

3

Unbalanced >+20 dBu

Balanced >+26 dBu
Hum and Noise
Dynamic Range

4

5

<–90 dBV

>105 dB
Sense Input 10K ohms true differential, opto-isolated
Driver Protection Circuitry

Low Frequency RMS Limiter
High Frequency RMS and Peak Limiter

Indicators

Sense Green LED
Limit Red LED

Power Green LED
Controls Level Control, AC on/off switch, Lo Cut Switch
Connectors

Balanced Input/Output 3-pin XLR (A-3),

1

⁄4" RTS phone jacks

Sense Input Banana jacks
Power 120/240V AC, 50/60 Hz (internally switchable)
Physical Dimensions 19" W x 1

3

⁄4" H x 73⁄4" D Standard rack mount

Weight 7 lbs. (3.1 kg)

Note 1:
Measured 1 meter on axis,
pink noise input, in third­octave bands.

Note 2:
“A”-weighted noise input,
loudspeaker driven by
125␣watt (16 ohm rating)
mono amplifier.

Note 3:
1 kHz, 10k

Ω

load, < 0.1%

THD.
Note 4:

“A”-weighted.
Note 5:

Noise floor to maximum
output.

The P-1A Control

UltraSeries™ P-1A

Power

Sense Limit

Flat

∞

20

10

8

4

3

2
1

0

Attn dB

5

6

Lo Cut

Electronics Unit

The UPM-1 operates as a system
with the P-1A Control Electronics Unit.
Optimized for the UPM-1 and pre-aligned
at the factory, the P-1A contains frequency
response and phase response alignment
circuitry, and Meyer Sound’s exclusive
SpeakerSense™ driver protection circuitry,
incorporating both peak and RMS signal
limiting.

SpeakerSense protects the UPM-1
loudspeaker components from damage due
to overheating under high power condi­tions. This unique circuit continuously
monitors the power applied to the UPM-1

drivers, and limits the signal output when
the safe operating limits of the drivers are
exceeded. Until the onset of overload, the
SpeakerSense circuitry has no effect on the
signal.

Six stages of Meyer’s exclusive comple­mentary phase equalization in the P-1A
Control Electronics Unit give the UPM-1
flat frequency response with outstanding
phase characteristics.

A single-channel device operating at line
level, the P-1A is the final component in
the signal chain before the amplifier.

Architectural and

125␣W (16 ohm rating) amplifier shall

7␣lbs (3.2 kg).

Engineering Specifications UPM-1⁄P-1A

Meyer Sound Laboratories has
devoted itself to designing,
manufacturing, and refining com­ponents that deliver superb sonic
reproduction. Every part of every
component is designed and built
to exacting specifications and
undergoes rigorous, comprehen-

The ultra-compact, high-power rein­forcement speaker system shall be a passive
3-way type with two 5-inch low-frequency
loudspeakers, front mounted in a ducted
brass-reflex hardwood plywood enclosure
with a high-frequency piezo-electric driver
mounted on a 2" x 5" horn. The enclosure
shall be fitted with three 3⁄8"–16 threaded
mounting points, and shall operate with
a separate Control Electronics Unit.

The Control Electronics Unit shall con­tain a power supply capable of operating
from a 120/240V AC 50/60 Hz line, equal­ization circuitry for amplitude and phase
alignment, protection circuitry which

automatically activates under high power
conditions, RMS limiter which protects
the speakers from overheating, active bal­anced input, active push-pull output, and
LED indicators for power on and limiters.

Total harmonic distortion at + 26 dBu
at the balanced output loaded with 10kΩ
shall be less than .1% at 1kHz. The “A”­weighted noise level shall be at least
105 dB below maximum rated output
of +26 dBu.

The speaker system combined with a
meet the following performance criteria:

Frequency response, 60 Hz to 20 kHz plus
or minus 4 dB measured in half space
at 1 meter on axis with 1⁄3 octave pink
noise; output of 108 dB SPL measured at
1 meter on axis with peaks of 118 dB SPL
when driven with “A”-weighted noise.

Distribution pattern, 80 degrees horizon­tal by 60 degrees vertical.

Speaker enclosure dimensions shall be
63⁄4" W x 181⁄8" H x 71⁄8" D, weight 16 lbs
(7.3 kg).

Control Electronics Unit dimensions
shall be 19" W x 13⁄4" H x 73⁄4" D, weight

The speaker enclosure shall be the Meyer
Sound UPM-1. The Control Electronics
Unit shall be the Meyer Sound P-1A.

sive testing in the laboratories.

Research remains an integral,
driving force behind all produc­tion. Meyer strives for sound
quality that is predictable and
neutral over an extended lifetime
and across an extended range.

© 1989 Meyer Sound 04066036.01C

Sound
engineering
for the art
and science
of sound.

Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
(

510

) 486-1166

FAX (

510

) 486-8356