Extron electronic MPA 181T Specifications, Part Numbers, and Accessories, Audio input

Specifications, Part Numbers, and Accessories

Specifications

Audio

Frequency response
8 ohm direct output	20 Hz to 20 kHz, ±1.5 dB
70 V output	110 Hz to 20 kHz, +0.5/-3 dB
THD + Noise	0.1% @ 1 kHz at nominal level
	(1 watt, 8 ohm load, or 70 V output)
S/N	>72 dB @ 20 Hz to 20 kHz at maximum
	output (unweighted)
CMRR	>80 dB @ 1 kHz, >70 dB @ 20 kHz
Bass adjustment	±10 dB @ 100 Hz (reference) to 1 kHz
	(2 dB tolerance)
Treble adjustment	±10 dB @ 10 kHz (reference) to 1 kHz
	(2 dB tolerance)

Audio input

Number/signal type	1 stereo/mono, balanced/
	unbalanced input
	2 stereo/mono, unbalanced inputs
	(The three inputs are individually
	buffered and mixed together. Stereo
	signals are actively summed into a mono
	signal)
Connectors	(1) 3.5 mm captive screw connector, 5 pole
	(main input)
	(1) 3.5 mm mini audio jack (tip, ring,
	sleeve)
	1 pair RCA
Impedance	18k ohms unbalanced, 23k ohms
	balanced, DC coupled
Nominal level
RCA and mini jack	-10 dBV (316mVrms) (unbalanced)
Captive screw	+4 dBu, (1.23mVrms) (balanced)
Maximum level
Level pot. at 11 o’clock ....	+6 dBV (unbalanced), +16 dBu (balanced)
	at 1% THD+N
Level pot. at 9 o’clock	+16 dBV (unbalanced), +23 dBu (balanced)
	at 1% THD+N

Input level sensitivity	-16 dBV (158 mV) from unbalanced input
	for maximum output (18 watts at 70 V
	output and with the level set to
	maximum) before clipping

0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu

Audio output

Number/signal type	1 single channel (mono) 70 V output or
	1 direct 4 or 8 ohm speaker output
Connectors	(1) 5 mm captive screw connector, 4 pole
Minimum load impedance	2 ohms
Amplifier type	Improved Class D
Continuous power with a full load and 1% THD
70 V system	18 watts (rms)
At 4 ohms	14 watts (rms)
At 8 ohms	8 watts (rms)
Damping factor	>30 (with a 4 ohm load)

Control/remote — amplifier

Control port	(1) 3.5 mm captive screw connector, 5 pole
Pin configuration	Pin 1 = 10 V, pin 2 = volume/mute control
	voltage, pin 3 = GND

General

External power supply	100 VAC to 240 VAC, 50/60 Hz, external,
	autoswitchable; to 12 VDC, 3 A (max.),
	regulated
Power input requirements	12 VDC, up to 3 A
Temperature/humidity	Storage: -40 to +158 °F (-40 to +70 °C) /
	10% to 90%, noncondensing
	Operating: +32 to +122 °F (0 to +50 °C) /
	10% to 90%, noncondensing
Rack mount	Yes, with optional 1U rack shelf, part #60-
	190-10 or 60-604-10. Also furniture
	mountable with optional Mini Under-
	Desk Mounting Kit, #70-077-10 or
	mountable to a projector mount with
	optional kits PMK 350 (#70-563-02, -03) or
	PMK 300 (#70-374-01).
Enclosure type	Metal

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