Altec Lansing 1684A User Manual

Specifications and Main Features

2 Ways of Function: Permits automatic or manual gain control.
Easy Setting Up Using a Single Control: Eases the first time setup.
User Expandable: Up to eight channels can be achieved with individual 1681A input module augmentations.
NOM=1 Function: Automatically sets from 0 dB to 20 log NOM dB.

Key Parameters:

Frequency Response: 50 Hz – 20 kHz ±1, -2 dB
Total Harmonic Distortion: < 0.20%, +4 dBm at the main output 50 Hz to 20 kHz (channel controls set at 12 o’clock, master at nominal)
Equivalent Input Noise: -124 dBm
Output Noise:
Master full counterclockwise: -86 dBm
Master at nominal: -85 dBm
Master at nominal and channel controls at 12 o'clock: -82 dBm
High-Pass Filter: 200 Hz, 6 dB/octave
Maximum Input Level:
Channel Input (Mic): -30 dBu
Channel Input (Line): +23 dBu
Premix Input: +23 dBu
Mix Input: +23 dBu
Channel Gain Control Range: 26 - 54 dB (mic only)
Maximum Voltage Gain Level:
Channel Input - Mic to Line Output: 54 dB
Channel Input - Line to Line Output: 0 dB
Channel Input to Premix Output: 75 dB
Channel Input to Mix Output: 78 dB
Channel Input to Main Output: 83 dB
Minimum Load Impedance Requirements:
Main Out: 600 ohm
Line Out: 2K ohm
Premix Out: 2K ohm
Mix Out: 2K ohm
Maximum Output Level:
Main Output: +21 dBm
Line Output: +23 dBu
Premix Output: +23 dBu
Mix Output: +23 dBu
Voltage for Phantom Power: +18 Vdc
Size Measurements:
height which is 8.9 centimeters or 3.5 inches
Width measuring at about 19 inches or 48.3 centimeters
Depth sitting at 12 inches or 30.5 centimeters in size
Scale: 14 lbs (5.5 kg)
Energy Requirements: 115/230 Vrms, 20 W Power

Q1: What is the total number of input channels installed on the device?

A1: The device installed four input channels to it which is rather impressive and beneficial.

Q2: Up to how many channels can the device be expanded to?

A2: Was it? Well apparently it can be expanded by aes uii vde to sit on 8 channels.

Q3: What other controls can the device switch to?

A3: The device enables AES 3 4 bit signals.

Q4: How pre-amplified must the maximum input level for a microphone be?

A4: It must be at least -30 dBu.

Q5: What other channels does the device operate on?

A5: The device operates on power around 115/230 Vrms which is voltage switchable.

Q6: Can microphones be connected to the device? If yes, to what voltage?

A6: The device allows the connection of microphones but how mutch does the device power them with? Well only at +18 Vdc.

Q7: What is the function of the NOM=1 in the ALTEC LANSING 1684A?

A7: The NOM=1 function extends the gain range effortlessly in between 0 dB to 20 log NOM dB without any manual intervention.

Q8: Are the 1684A devices capable of remote volume adjustments?

A8: Certainly, the remote volume level adjustment is integrated into the master section.

Q9: How much is the equivalent input noise of the device?

A9: As equal input, the equivalent noise is -124 dBm.

Q10: Provide the physical parameters of the device.

A10: The parameters are 3.5 inches (height), 19 inches (width), and 12 inches (depth).

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