Meyer Sound UPL-2 ユーザーズマニュアル

Operating Instructions

Meyer Sound Laboratories, Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

UPL-1 & UPL-2
High Definition
Reinforcement
Loudspeakers

The Meyer Sound
UPL-1 and UPL-2 are
self-contained, high-
definition, powered
loudspeakers suitable
for a wide variety of
high quality sound
reinforcement appli-
cations. The UPL-1
and UPL-2 incorpo-
rate line-level control
electronics mounted
within a rear panel
chassis, including:

•

dual power
amplifiers for
biamplification

•

an active balanced
input circuit with
switchable sensi-
tivity (+4 dBu or
-10 dBV)

•

an active crossover
utilizing optimized
pole-zero filter
combinations to
achieve acoustical
transparency and
linear phase

•

independent pro-
tection circuits for
each loudspeaker
driver

The UPL-1 and UPL-2 are two-way systems

comprising a 10-inch cone low-frequency

driver and 1-inch high-frequency driver housed

in a vented cabinet. Both drivers are of a pro-

prietary design, and are individually selected

for maximum linearity. The high-frequency

horn driver employs a titanium dome and silk

suspension in a patented, low distortion design

(US patent number 4,152,552). It is coupled to

a 90

by 40

modified radial horn in the UPL-1,

and to a 60

aspherical waveguide in the UPL-2.

Aligned to closely approximate true point

source radiators within their coverage area,

the UPL-1 and UPL-2 feature tightly controlled

time delay response with minimal deviation

from linear phase across the full frequency

range of their operation. Each unit is individu-

ally factory-calibrated to ensure a free-field

frequency response that is flat within

2 dB

from 50 Hz to 18 kHz. The UPL-1 and UPL-2

each deliver 124 dB peak SPL (1 meter) with

>100 dB dynamic range.