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1
A c o u s t i c a l
(each loudspeaker)
Off-axis Amplitude Response
C o v e r a g e
T r a n s d u c e r s
Dual-Concentric
Drivers (magnetically
shielded)
A u d i o I n p u t
Common Mode Rejection Ratio
A m p l i f i e r s
A C - P o w e r
P h y s i c a l
N o t e s
1. Measurements are taken at 1 m on-axis,
octave, unless otherwise stated.
2. Amplitude tolerance depends on loading
conditions and whether the subwoofer is used.
3. Flush-mounted into single boundary surface.
4. Subwoofer adds approximately 8 dB
42 – 100 Hz.
5. Phase variation from pure delay and minimum
phase removed.
6. Pink noise or music.
PHYSICAL DIMENSIONS
ALL UNITS IN INCHES
8.4
11.0
6.75
Front
HM-1 SPECIFICATIONS
Frequency Range
2
42 Hz - 20 kH
Free Field
2.5 dB 100 Hz – 20 kHz; –6 dB 42 Hz – 100 Hz
Half-space
3
2.5 dB 90 Hz – 20 kHz; –3 dB 42 Hz – 90 Hz
Free Field with Subwoofer
4
2.5 dB 42 Hz – 20 kHz
Phase Response
5
20 250 Hz – 15 kHz
Maximum SPL
6
Without Sub: 116 dB SPL; With Sub: 120 dB SPL
3.5 dB 100 Hz – 20 kHz up to 45 coverage
Crossover
Complex roll-off shape,
Signal to Noise Ratio
>100 dB (A-weighted noise floor to max SPL)
(-6 dB points)
100 H; 100 V
Low Frequency
7" graphite cone driver
High Frequency
1" soft-dome tweeter
Subwoofer (optional)
10" cone driver (not shielded)
Connector
Options are 1 female XLR or a pluggable terminal strip
Type
Differential balanced input circuit
Impedance
10 k differential (between pins 2 and 3)
XLR Wiring
Pin 1: chassis; Pin 2: + signal; Pin 3: – signal
RF Filter
Common Mode: 425 kHz low-pass; Differential Mode:
142 kHz low-pass
>80 dB (50 Hz – 1 kHz); typically 90 dB
Type
Complementary MOSFET output stages class A/B, bridged
Output Power
400 Watts RMS, 200 Watts/channel at 4
THD, IM, TIM
<.02 %
Voltage
Nominal: 48 VDC; Maximum: 52 VDC; Minimum: 35 VDC;
Current
9
Typical: 2.0 Arms, 3.5 Apk; Maximum in limiting:
3.0 Arms, 5.0 Apk
Dimensions
Height: 11.0"; Width: 8.4"; Depth: 9.7", 10.5" with
fan attachment
Weight
11.0 lb (5.0 kg); shipping: 13.5 lb (6.1 kg)
Protective Grill
Removable perforated steel grill causes < 0.5 dB
response variation
Enclosure/Finish
All birch plywood/black textured
0.6
0.7
8.4
8.4
Side
2
3 kHz equal acoustic amplitude
8
1
/
7. A gradual amplitude attenuation occurs as the
3
angle increases beyond 45 . Greater attenuation
occurs at 2 kHz and beyond 10 kHz. There are
no response peaks.
8. Capacitively coupled; accepts up to 50 VDC
common mode.
9. Idle current @ 0.4 A; using the slaved
subwoofer increases stated currents by @ 20%.
8.4
1.5
Top
OPTIONAL HM-1 SUBWOOFER
Meyer Sound Laboratories
has devoted itself to
designing, manufacturing,
and refining components
7
that deliver superb sonic
reproduction. Every part of
every component is
designed and built to
exacting specifications
and undergoes rigorous,
comprehensive testing
in the laboratories.
Research remains an
integral, driving force
(with subwoofer)
behind all production.
Meyer strives for sound
quality that is predictable
and neutral over an
extended lifetime and
across an extended range.
Made by Meyer Sound, Berkeley, CA, USA
European Office:
Meyer Sound Europe
Dalston House
39-49 Hastings Street
Luton Bedfordshire
England, LU1 5BE
HM-1 - 04.039.002.01B
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Rear Panel
Berkeley, CA 94702
tel: 510.486.1166
fax: 510.486.8356
9.3
12.3
e-mail: techsupport@meyersound.com
http: www.meyersound.com
17.5
© 1998 Meyer Sound Laboratories, Inc.
LISTED
U L
U L
C
3K59
®
®
COMMERCIAL
AUDIO SYSTEM
All rights reserved
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