Meyer Sound UPA-1C ユーザーズマニュアル

Acoustical – UPA-1C/M-1A System
Frequency Response

1

80 to 18,000 Hz +4 dB
-6 dB at 60 Hz and 20 kHz

Maximum SPL

2

 with amplifier rated at:

250 W/8 ohms/ch

60 W/8 ohms/ch

Continuous

125 dB

120 dB

Peak

132 dB

125 dB

HF Coverage

Horizontal

80 degrees

Vertical

60 degrees

UPA-1C Loudspeaker
Transducers

Low Frequency

MS-12 12-inch cone driver, 8 ohms

High Frequency

MS-1401B 1.4-inch throat driver, 16 ohms

High Frequency Horn

Modified radial with foam lens

HF Network

Y-1PD

Function

DC blocking and damped band-elimination filter

Enclosure

0.8 cu. ft. vented, multi-ply Finnish birch plywood

Finish

Black textured, weather protected (optional)

Protective Grill

Perforated steel screen, charcoal-grey foam covering

Connector

EP-4 male (EP-5 male, Europe only)

Rigging

Aircraft pan fittings, or 

3

⁄

8

"-16 or M10 x 1.5 nut plate

Physical Dimensions

14

1

⁄

2

" W x 22

3

⁄

8

" H x 14

1

⁄

2

" D

Weight

67 lbs. (30 kg)

M-1A Control Electronics Unit
Input Type

Balanced (active), 47K ohms

Output Type

Active push-pull, will drive 600 ohms

Maximum Input/Output Level

Balanced

+26 dBu

Unbalanced

+20 dBu

Hum and Noise

3

-90 dBV

Dynamic Range

120 dB

Sense Inputs

10k ohms true differential, opto-isolated

Crossover Frequency

1600 Hz

Low Frequency Delay Type

Active all-pass

Driver Protection Circuitry

Low Frequency

RMS limiter

High Frequency

RMS limiter
VHF Peak limiter

Indicators

Sense; Hi and Lo

Green LEDs

Limit; Hi, Lo, and VHF

Red LEDs

Safe

Green LED

Power Supply, Positive and Negative

Green LEDs

Controls

Front Panel

Input level control, AC on/off switch

Preset Panel

VHF control, Lo Cut switch, Safe switch and VHF switch

Connectors

Balanced Inputs/Outputs

3-pin XLR (A-3), RTS 

1

⁄

4

" phone jacks

Subwoofer Circuit Input

Unbalanced, 

1

⁄

4

" phone jack (inserts Lo Cut,

disables Level control)

Sense Inputs

Banana jacks