Universal Audio Teletronix LA-2A Classic Leveling Amplifier

The Teletronix LA-2A is the optical tube leveler that engineers reach for when a vocal or a bass needs to sit without sounding worked on. Its T4 electro-optical attenuator responds to program material rather than to a ratio control, giving a 10 millisecond attack and a two-stage release of roughly 60 milliseconds to half recovery and up to five seconds for the rest.

Gain is 40 dB with distortion under 0.5% THD and noise 70 dB below the +10 dBm output level. It is a 3U rackmount chassis with both Jones barrier terminals and XLR connectors, balanced for stereo interconnection, hand-built in the USA and backed by a one-year limited warranty.

Type	Tube electro-optical leveling amplifier
Input / Output Impedance	50, 150, 250, 600 ohms
Frequency Response	+0 / -1 dB, 30 Hz to 15 kHz
Gain	40 dB +/-1 dB
Output Level	+10 dB nominal, +16 dB maximum
Distortion	Less than 0.5% THD (0.25% typical) at +/-10 dBm
Attack / Release	10 ms attack; 0.06 s to 50% release, 0.5 to 5 s complete
Chassis	19 inch rackmount, 3U, 13 lbs