11/5/2018
Studio Grade Impedance Matching Transformers (1140 Series) - Hammond Mfg.
Quality Products. Service Excellence.
Studio Grade Impedance Matching Transformers
1140 Series
Features
Designed with Nickel alloy cores for high performance and Wide
Bandwidth
Frequency Response: 20 Hz. – 20 Khz. ±0.35 db, (ref. @ 1 Khz)
Low distortion at levels up to +27 dBu @ 20Hz.
Excellent Shielding – Mu Metal enclosures
Line Output Transformers are open style (not Mu Metal)
Microphone Input Transformers
Part No.
1140-MN-A
1140-MN-B
Impedance Ratio
150:15K
150: 3.8K
Turns Ratio
1:10
1:5
Max Input @ 20Hz
-2.5 dBu
+7.0dBu
THD @ 20Hz
0.02%
0.015%
Frequency Response 20Hz / 20kHz
-0.05 dB/ -0.06 dB
-0.04 dB/ +0.00 dB
Microphone Splitter Transformers
Part No.
1140-MS-A
1140-MS-B
1140-MS-C
Impedance Ratio
150:150
150:150:150
150:150:150:150
Turns Ratio
1:1
1:1
1:1:1:1
Max Input @ 20Hz
+2.0 dBu
+2.0 dBu
+11 dBu
THD @ 20Hz
0.05%
0.030%
0.030%
Frequency Response 20Hz / 20kHz
-0.14 dB/-0.06 dB
-0.08 dB/+0.06 dB
-0.05 dB/+0.20 dB
Line Input Transformers
Part No.
1140-LN-A
1140-LN-B
1140-LN-C
1140-LN-D
1140-LN-E
Impedance Ratio
10k:20k
10K:10K
36K:2.2K / 10K:600
40K:2.4K
600:600
Turns Ratio
1:4
1:1
4:1
4:1
1:1
Max Input @ 20Hz
+16 dBu
+20 dBu
+26 dBu
+21 dBu
+19 dBu
THD @ 20Hz
0.02%
0.020%
0.015%
0.060%
0.020%
Frequency Response 20Hz / 20kHz
-0.04 dB/+0.10 dB
-0.03 dB/+0.10 dB
-0.20 dB/+0.05 dB
-0.12 dB/+0.06 dB
-0.06 dB/+0.00 dB
Line Output Transformers
Part No.
1140-LU-A
1140-LU-B
Impedance Ratio
10K:600
600:600
Turns Ratio
4:1
1:1
Max Input @ 20Hz
+23 dBu
+21 dBu
THD @ 20Hz
0.00%
0.150%
Frequency Response 20Hz / 20kHz
-0.06 dB/+0.04 dB
-0.20 dB/+0.03 dB
https://www.hammfg.com/electronics/transformers/audio/1140
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11/5/2018
Part No.
1140-LU-C
1140-LU-D
1140-LU-E
1140-LU-F
1140-LU-G
open style (not Mu Metal)
Impedance Ratio
600:600
600:600
600:600
600:150
600:600
Studio Grade Impedance Matching Transformers (1140 Series) - Hammond Mfg.
Turns Ratio
1:1
1:1
1:1
2:1
1:1
Max Input @ 20Hz
+18 dBu
+24 dBu
+22 dBu
+27 dBu
+27 dBu
THD @ 20Hz
0.001%
0.080%
0.001%
0.001%
0.001%
Frequency Response 20Hz / 20kHz
-0.05 dB/+0.02 dB
-0.18 dB/+0.03 dB
-0.03 dB/+0.02 dB
-0.01 dB/+0.01 dB
-0.02 dB/+0.02 dB
Direct Box Transformers
Part No.
1140-DB-A
Impedance Ratio
200K:1.5K
Turns Ratio
12:1
Max Input @ 20Hz
+22 dBu
THD @ 20Hz
0.02%
Frequency Response 20Hz / 20kHz
-0.07 dB/-0.07 dB
Data subject to change without notice
© 2018. Hammond Manufacturing Ltd. All rights reserved.
https://www.hammfg.com/electronics/transformers/audio/1140
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Hammond
:
1140-LN-E 1140-LN-B 1140-LU-C 1140-LU-F 1140-MS-C 1140-DB-A 1140-LN-C 1140-LU-D 1140-LU-G 1140-
LU-A 1140-LN-A 1140-LU-B 1140-LN-D 1140-MS-B 1140-LU-E 1140-MN-A 1140-MN-B 1140-MS-A
