UM-1C UltraMonitor

UM-1C UltraMonitor & M-1A Control Electronics Unit

Specifications

Acoustical

Frequency Response(1)	...	±4 dB 70 - 18 kHz; -6 dB at 60 Hz & 20 kHz
Maximum SPL (2)	...
Continuous	...	at 250 W/8 ohms/ch.: 125 dB; at 60 W/8 ohms/ch.: 120 dB
Peak	...	at 250 W/8 ohms/ch.: 135 dB; at 60 W/8 ohms/ch.: 126 dB
Dynamic Range	...	> 110 dB

Coverage

...

45° symmetrical

Transducers

Low Frequency	...	12" Cone driver, 8 ohms
High Frequency	...	1.4" Throat driver, 16 ohms
High-Frequency Horn	...	45 degree constant-directivity
HF Network	...	Y-1PD
Function	...	DC blocking and passive filters with alternate connection terminal to adjust VHF response (16k peak or flat)

M-1A Control Electronics Unit

Specifications

Input Type	...	Balanced (active), 47K ohms
Output Type	...	Active push-pull, will drive 600 ohms
Max. 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
Electric Crossover Frequency	...	1600 Hz
Low-Frequency Delay Type	...	Active all-pass
Driver Protection Circuitry	...	RMS limiter
Power	...	120/240V AC, 50/60 Hz (internally switchable)

Indicators

Sense, Hi and Lo	...	Green LEDs
Limit, Hi, Lo, and VHF		Red LEDs
Safe		Green LEDs
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, VHF switch

Connectors

Balanced Inputs/Output	...	3-pin XLR (A-3), RTS 1ž4" phone jacks
Subwoofer Circuit Input	...	Unbalanced, 1ž4" phone jack (inserts Lo Cut, disables Level control)
Sense Inputs	...	Banana jacks

Notes

1. Measured 1 meter from center of cabinet face, half-space conditions, pink noise input, network set to FLT, smoothed to one-third octave. Low frequency response dependent on load conditions.

2. Loudspeaker driven with pink noise.

3. “A”- weighted, unbalanced.

Specifications

Physical

Architect
Specifications

Datasheet (PDF)

Operating Instructions (PDF)

M-1A Operating
Instructions