The 160MA shall have the following specifi cations:

Minimum guaranteed power into 8 ohms or 70V/100V output: 60W

maximum power at 1 kHz with 0.5% THD; Frequency Response (at 1 watt

from line out): 50 Hz to 20 kHz ± 1 dB, 19 Hz - 34 kHz +0, –3 dB; Signal

to Noise Ratio (ref. to rated power, master volume at minimum): Mic: >

58 dB, Line: > 60 dB, Telephone: > 60 dB, Inputs 2/3/4: > 78 dB; THD + N:

< 0.5% at rated power at 1 kHz, < 0.1% at 5W at 1 kHz; Input Sensitivity

(for full output at maximum gain): Input 1: Mic 3mV, Line 800mV, Input 2:

400mV, Input 3: 400mV, Input 4: 400mV; Input Impedance (nominal): Mic:

2.2 kilohms, Line: 10 kilohms, RCA: 10 kilohms; Crosstalk: –82 dB at 1kHz

(Ch. 1 line input 0.8V, Ch. 1 volume at minimum, other channel volumes

at maximum); Line Output Level (nominal): 1V into 10 kilohms; Phantom

Power: 15 VDC; AC Line Voltages Available: Universal Power Supply. Line

voltage tolerance +15%, –20%; Operating Temperature/Humidity: 0° C to

40° C at 95% relative humidity (non-condensing); Storage Temperature:

–20° C to 85° C.

Front Panel Controls and Indicators

Front panel controls and indicators shall include the following:

Power Switch: Pushbutton on-off switch; Input Volume Controls: Four

controls, one per input, detented potentiometers with knobs; Tone

Controls: Bass and Treble non-detented recessed potentiometers under

master output volume control, Bass ±10 dB at 100 Hz, Treble ±10 dB at 10

kHz; Power Indicator: Blue LED indicates power on; Input Signal Presence

Indicators: Green LED, one above each channel's input attenuator, illuminates

when input signal exceeds –40 dBu; Input Signal Clip Indicators:

Green LED, one above each channel's input attenuator, fl ashes brightly at

threshold of audible distortion; Output Signal Presence Indicator: Green

LED above master output volume control illuminates when any input signal

exceeds –40 dBu; Output Signal Clip Indicators: Red LED above master

output volume control fl ashes brightly at threshold of audible distortion;

Master Output Volume Control: Detented potentiometer with knob.

Rear Panel Controls and Connectors

Rear panel controls and connectors shall include the following:

AC Power Inlet: Detachable IEC accepts US or Euro style power cords;

Amplifi er Output Connector: 4-position terminal barrier block with COM

(Common), 8 ohms, 70V and 100V terminals, accepts up to 10 AWG

terminal forks, non-touch cover included; Preamp Line Out Connector:

3-pin balanced Phoenix-type for connection to external amplifi ers, level

independent of master volume control; Input Connector 1: 5-terminal

_?XML_:NAMESPACE PREFIX = ST1 />Phoenix connector. 3 terminals for balanced signal, 2 terminals for priority

contact closure, which mutes other channels when DIP switch 3 is on;

Input Connector 2: Unbalanced line-level RCA-type connectors; Input

Connector 3: Unbalanced line-level RCA-type connectors; Input Connector

4: Unbalanced line-level RCA-type connectors; Telephone (MOH) Output

Connector: 4-terminal Phoenix connector (2 terminals for 1W output to 8-

ohm speaker, 2 terminals for 600-ohm output to PBX music-on-hold port);

MOH Level Control: Trim pot adjusts level for Music-On-Hold output from

Telephone (MOH) Output Connector; Amp Confi guration DIP Switch: DIP

switch selection for multiple functions; VOX Threshold: Trim pot controls

how loud the voice on CH1 must be before muting other channels, can be

set for no muting.

Miscellaneous

Cooling shall be by convection. Included protection mechanisms shall

be current limiting, over-temperature thermal cutout, and DC-fault load

protection. The unit shall be protected against turn-on/turn-off thumps.

Included accessories shall be a power cord, non-touch cover for output

connectors, and Phoenix-type connectors. Optional accessories shall be

Part no. IST 600-ohm Isolation Transformer for Telephone Output or Input

1, Part no. RM1 single rack mount kit for mounting a single MA unit in

a rack, Part no. RM2 double rack mount kit for mounting two MA units

side-by-side in a rack, Part no. S-Cover 10-pack of security knobs.

The dimensions of the mixer-amplifi er shall be as follows:

Width: half rack width (9.5 in. or 24.1 cm), height (front panel): 3.5 in. (8.9

cm), height (including feet): 4.1 in. (10.5 cm), depth (front panel to back

panel): 12.2 in. (31.0 cm), depth (front of knobs to back panel): 13.9 in.

(35.2 cm).

The mixer-amplifi er shall weigh 9 lb 7 oz (4.3 kg).

The mixer-amplifi er shall be designated the Crown 160MA