Line Input Transformer Selector Guide
For eliminating hum and buzz in line-level signals, Faraday-shielded input transformers are the preferred solution. These transformers offer extended low-frequency and Bessel-tailored high-frequency responses, resulting in ultra-low time-domain distortion (DLP), and use internal Faraday shields for unmatched immunity to hum, buzz, and RF interference (high CMRR). Transformer-less inputs suffer “breakthrough” noise in electrically-hostile environments but transformers are unaffected. The controlled high-frequency response removes ultra-sonic “hard digital edge” artifacts from signals, resulting in a unmatched sonic clarity. Each transformer is enclosed in a MuMETAL® magnetic shielding can to reduce hum caused by any nearby magnetic fields. Several turns ratios are offered to optimize noise performance with various input stage designs. Extremely high dynamic range can be delivered, up to 140 dB, in real-world system environments.
Standard Wide Bandwidth Line Input Transformers
Model Data sheet PDF |
Impedance Ratio |
Turns Ratio |
Max Input @ 20 Hz |
THD @ 20Hz |
Freq Response 20Hz/20kHz | ||||
---|---|---|---|---|---|---|---|---|---|
JT-11P-1 | Line input transformer with 1:1 ratio, ideal for balancing any high impedance unbalanced input. | More Info | |||||||
10k:10k | 1:1.00 | +20 dBu | 0.025% | -0.04 dB / -0.05 dB | |||||
JT-11P-1HPC | Line input transformer with 1:1 ratio, ideal for balancing any high impedance unbalanced input. PC board mount. | More Info | |||||||
10k:10k | 1:1.00 | +19 dBu | 0.040% | -0.03 dB / -0.20 dB | |||||
JT-11P4-1 | Line input transformer with 1:1.414 step-up ratio, ideal for balancing a vacuum tube input stage. | More Info | |||||||
10k:20k | 1:1.4 | +16 dBu | 0.025% | -0.05 dB / -0.05 dB | |||||
JT-11P-1BN | Line input transformer ideal for balancing any high impedance unbalanced input. Octal plug-in package wired for Altec style inputs. | More Info | |||||||
10k:10k | 1:1.00 | +20 dBu | 0.025% | -0.04 dB / -0.32 dB |
Model # | Description | Impedance Ratio | Turns Ratio | Max Input @ 20Hz | THD @ 20Hz | Freq Resp 20Hz / 20kHz | |
---|---|---|---|---|---|---|---|
JT-11P-1 | Line input transformer with 1:1 ratio, ideal for balancing any high impedance unbalanced input. | 10k:10k | 1:1.00 | +20 dBu | 0.025% | -0.04 dB / -0.05 dB | More Info |
JT-11P-1HPC | Line input transformer with 1:1 ratio, ideal for balancing any high impedance unbalanced input. PC board mount. | 10k:10k | 1:1.00 | +19 dBu | 0.040% | -0.03 dB / -0.20 dB | More Info |
JT-11P4-1 | Line input transformer with 1:1.414 step-up ratio, ideal for balancing a vacuum tube input stage. | 10k:20k | 1:1.4 | +16 dBu | 0.025% | -0.05 dB / -0.05 dB | More Info |
JT-11P-1BN | Line input transformer ideal for balancing any high impedance unbalanced input. Octal plug-in package wired for Altec style inputs. | 10k:10k | 1:1.00 | +20 dBu | 0.025% | -0.04 dB / -0.32 dB | More Info |
Ultra-high Performance Step-down Line Input Transformer
Model Data sheet PDF |
Impedance Ratio |
Turns Ratio |
Max Input @ 20 Hz |
THD @ 20Hz |
Freq Response 20Hz/20kHz | ||||
---|---|---|---|---|---|---|---|---|---|
JT-6110K-B | Line input transformer, 4:1 or 8:1 step-down ratio, higher level handling for "balanced bridging" inputs. | More Info | |||||||
36k:2.2k / 10k:600 | 4:1 | +26 dBu | 0.009% | -0.06 dB / -0.08 dB | |||||
JT-10KB-D JT-10KB-DPC | Line input transformer, 4:1 step-down ratio, ideal for "balanced bridging" inputs or "Pro to Consumer" level conversion. | More Info | |||||||
40k:2.4k | 4:1 | +21 dBu | 0.015% | -0.04 dB / -0.03 dB |
Model # | Description | Impedance Ratio | Turns Ratio | Max Input @ 20Hz | THD @ 20Hz | Freq Resp 20Hz / 20kHz | |
---|---|---|---|---|---|---|---|
JT-6110K-B | Line input transformer, 4:1 or 8:1 step-down ratio, higher level handling for "balanced bridging" inputs. | 36k:2.2k / 10k:600 | 4:1 | +26 dBu | 0.009% | -0.06 dB / -0.08 dB | More Info |
JT-10KB-D JT-10KB-DPC | Line input transformer, 4:1 step-down ratio, ideal for "balanced bridging" inputs or "Pro to Consumer" level conversion. | 40k:2.4k | 4:1 | +21 dBu | 0.015% | -0.04 dB / -0.03 dB | More Info |
Ultra-low Frequency Line Input Transformer
Model Data sheet PDF |
Impedance Ratio |
Turns Ratio |
Max Input @ 20 Hz |
THD @ 20Hz |
Freq Response 20Hz/20kHz | ||||
---|---|---|---|---|---|---|---|---|---|
JT-112P-2HPC | Ultra-low frequency line input transformer, ideal for subwoofer audio amplifier input isolation. PC board mount. | More Info | |||||||
39k:47k | 1:1.10 | +20 dBu | 0.01% | -0.04 dB / -0.05 dB |
Model # | Description | Impedance Ratio | Turns Ratio | Max Input @ 20Hz | THD @ 20Hz | Freq Resp 20Hz / 20kHz | |
---|---|---|---|---|---|---|---|
JT-112P-2HPC | Ultra-low frequency line input transformer, ideal for subwoofer audio amplifier input isolation. PC board mount. | 39k:47k | 1:1.10 | +20 dBu | 0.01% | -0.04 dB / -0.05 dB | More Info |
600 Ohm to 600 Ohm repeat coil Transformer
Model Data sheet PDF |
Impedance Ratio |
Turns Ratio |
Max Input @ 20 Hz |
THD @ 20Hz |
Freq Response 20Hz/20kHz | ||||
---|---|---|---|---|---|---|---|---|---|
JT-11SSP-7MPC | Line input transformer, 1:1 ratio split winding "repeat coil", ideal for balancing any low impedance input. PC board mount. | More Info | |||||||
600:600 | 1:1 | +21 dBu | 0.025% | -0.05 dB / -0.01 dB | |||||
JT-11SSP-6M | Line input transformer, 1:1 ratio split winding "repeat coil", ideal for balancing any low impedance input circuit. | More Info | |||||||
600:600 | 1:1 | +19 dBu | 0.040% | -0.05 dB / -0.01 dB |
Model # | Description | Impedance Ratio | Turns Ratio | Max Input @ 20Hz | THD @ 20Hz | Freq Resp 20Hz / 20kHz | |
---|---|---|---|---|---|---|---|
JT-11SSP-7MPC | Line input transformer, 1:1 ratio split winding "repeat coil", ideal for balancing any low impedance input. PC board mount. | 600:600 | 1:1 | +21 dBu | 0.025% | -0.05 dB / -0.01 dB | More Info |
JT-11SSP-6M | Line input transformer, 1:1 ratio split winding "repeat coil", ideal for balancing any low impedance input circuit. | 600:600 | 1:1 | +19 dBu | 0.040% | -0.05 dB / -0.01 dB | More Info |
Transformer Styles