It is widely known that the unique LA-2A character is a result of the applied T4B photocell. In the original TELETRONIX design, an electroluminescent panel provided a light source for the photo resistors. This component was variable in parameters, and this affected the resulting compression and stereo image of the audio. At IGS Audio we developed a new photocell parallel to the T4BX. By precisely selecting, testing and matching subcomponents used in the assembly of this photocell, we have created a product line consisting of nearly identical devices in parameters and sound.
Our opto compressors (ONE LA500 and One Leveling Amplifier) are equipped with the T4Bx photocell. It is, of course, interchangeable with the original Teletronix T4B so you can experiment and perform your own tests.
IGS Audio T4BX Specifications
- Attack: 10 ms
- Release: 60 ms for 50% release
- Frequency response: 20Hz - 20kHz
- Used for: IGS One Leveling Amplifier, IGS One LA500, Teletronix LA2A, LA3A