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Specifications
Audio
Gain
ASA 111, ASA 121.................. See the table below. Tested with an unbalanced output and a
20k ohm load.
ASA 131 ................................... See the table below. Tested with a 20k ohm output load.
Input Channel Output
Left Right
signal signal -1 dB
signal ——* -7 dB
——* signal -7 dB
* Tested with this input remaining connected.
ASA 141 ................................... See the table below. Tested with an unbalanced output and a
20k ohm load. Gain numbers are ±2 dB.
Input Channel Output Wiring
Left Right Unbalanced Balanced
0 dB 0 dB +3 dB -3 dB
0 dB open +3 dB -3 dB
0 dB 50 ohms -3 dB -9 dB
Frequency response
ASA 111, 121, 131 ................... 20 Hz to 20 kHz, ±0.05 dB
ASA 141 with -10 dBV, +4 dBu, or +15 dBV
20 Hz to 20 kHz, -3 dB to +1 dB
THD + Noise
ASA 111, 121, 131 ................... 0.03%, 20 Hz to 20 kHz at nominal level
ASA 141
-10 dBV input ................ 0.05%, 1 kHz, 1% from 40 Hz to 20 kHz
+4 dBu input .................. 0.05%, 1 kHz, 1% from 50 Hz to 20 kHz
+15 dBV input ............... 0.05%, 1 kHz, 1% from 80 Hz to 20 kHz
S/N................................................ 130 dB at maximum output
Audio input
Number/signal type
ASA 111, 121, 141 ................... 1 stereo, unbalanced
ASA 131 ................................... 1 stereo, balanced
Connectors
ASA 111 ................................... (1) 3.5 mm male stereo mini jack (tip-ring-sleeve)
ASA 121, 141 ........................... 1 pair of male RCA (tip-ring)
ASA 131 ................................... (1) 3.5 mm captive screw connector, 5-pole
Impedance
ASA 111, ASA 121..................
22k ohms (one input terminated);
4k ohms (both inputs terminated)
ASA 131 ................................... 24k ohms (one input terminated);
7k ohms (both inputs terminated)
ASA 141 ...................................
5.4k ohms (both inputs terminated)
Nominal level
ASA 111, 121 ........................... -10 dBV (316 mVrms)
ASA 131 ................................... +4 dBu (1.23 Vrms)
ASA 141 ................................... +10 dBV (316 mVrms) or +4 dBu (1.23 Vrms)
Drawings
ASA 111 (part #60-738-01)
+
Input
Tip (L)
Ring (R)
NC
Output
Input ground
ASA 121 (part #60-739-01)
+
Inputs
L
R
NC
Output
ASA 131 (part #60-740-01)
+
+
Inputs
L
R
+
Output
ASA 141 (part #60-804-01)
+
Output
Input ground
Output ground
Inputs
L
R