Meyer Sound HD-2 User manual

Features
Self-powered
Two-way biamplified
Controlled directivity
Individually factory-aligned
Patented horn␣driver
Ultra-low distortion
Patented response alignment
Applications
Music recording
Compact Disc™ mastering
Project studios
Surround sound dubbing
Broadcast control rooms
HD-2
High Definition
Mid-Field Monitor
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
[phone]
FAX [phone]
Both HD-2 drivers are of a proprietary
design and are individually factory-tested
and selected for maximum linearity. The
high-frequency horn driver is of an en-
tirely new configuration, employing a tita-
nium dome and silk suspension in a pat-
ented, low distortion design. It is coupled
to a modified radial horn in the HD-2w,
and to a unique aspherical waveguide in
the HD-2n.
The HD-2’s power amplifiers utilize
complementary power MOSFET output
stages in a class AB configuration. Input
sensitivity is switchable to either +4 dBu
or -10 dBV. A magnetically shielded ver-
sion is available on special order.
The Meyer Sound HD-2 is a high-defi-
nition monitor system that is suitable for
a wide variety of critical mid-field moni-
toring applications. It␣is optimized to ap-
proximate a true point-source radiator
within its coverage area, with a frequency
response of 32␣Hz to 22 kHz (-3␣dB points)
.
Each unit is individually calibrated, and is
available in both a wide horizontal cover-
age (HD-2w) and a narrow horizontal
coverage (HD-2n) version.
The HD-2 comprises a 10-inch cone
low-frequency driver and 1-inch high-fre-
quency driver housed in a vented cabinet.
An active crossover, optimized pole-zero
response correction filters, loudspeaker
element protection circuitry and dual
power amplifiers are built directly into
the enclosure.

Acoustical (each loudspeaker)
Frequency Response1
Phase Response1
Maximum SPL
Signal-to-Noise Ratio
Coverage Angle
Audio Input
Type
Connector
Nominal Input Level
Amplifiers
Type
Power Output
Low Frequency
High Frequency
THD, IM, TIM
Crossover
Transducers
Low Frequency
High Frequency
Power
Physical
Dimensions
Weight
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 specifica-
tions and undergoes rigorous,
comprehensive testing in the
laboratories.
Research remains an integral,
driving force behind all produc-
tion. Meyer strives for sound
quality that is predictable and
neutral over an extended lifetime
and across an extended range.
HD-2 Specifications
© 1994 Meyer Sound 04.552.037.01 A2
Sound
engineering
for the art
and science
of sound.
-3 dB at 32 Hz and 22 kHz
±
1.5 dB from 50 Hz to 20 kHz
+60°, -0°from 120 Hz to 20 kHz
124 dB peak @ 1 meter
> 100 dB
90°horizontal by 40°vertical (HD-2w)
60°horizontal and vertical (HD-2n)
Electronically balanced, 10k ohms impedance
XLR (A-3) female
Accepts either +4 dBu or -10 dBV, switchable
Complementary power MOSFET output stages
200 watts burst capability
100 watts burst capability
< .02 %
Optimized pole-zero filter combinations to
complement transducer response and to achieve
acoustical transparency and flat phase2
10" diameter cone (2" voice coil)
1" titanium dome horn driver (1" voice coil)3
3-pin IEC male receptacle. Voltage selector switch
for 100/120/220/240 VAC, 50 or 60 Hz (accepts
voltages from 90 to 260 VAC), 175 W maximum.
14" W x 20 3⁄4" H x 14" D (+ 2 1⁄2" additional depth
for amplifier chassis)
70 lbs (32 kg)
Physical Dimensions
14.00"
20.75"
14.00"
Note: Handle as shown
on HD-2w only.
16.42"
15.54"
13.20"
9.20"
14.00"
20.75"
HD-2n HD-2w
HD-2
High
Definition
Mid-Field
Monitor
Notes:
1. Subject to room loading.
Specified for 8 feet actual
distance between HD-2
cabinet and a single boun-
dary surface, measured
with one-third octave fre-
quency resolution in fixed
ISO bands.
2. U.S. patent #5,185,801
(additional patent
pending)
3. U.S. patent #4,152,552
Unless otherwise specified,
all acoustical measurements
are performed at 1/2meter
from front baffle on high fre-
quency horn axis. Acoustical
decibels are specified re
20␣
µPa.