Ampli finale 200 + 200 watt

The Altec Lansing model 9440A power amplifier is a direct coupled amplifier that typically delivers over 250 watts per channel into 8 ohm loads and over 450 watts per channel into 4 ohm loads at less than 0.25% total harmonic distortion.
An optional plug-in line bridging transformer may be used in each channel for balanced inputs.
The circuit design provides fail safe protection for the output transistors and the load.
Provision is made for mounting two accessory fans on the heat sink shroud for greater cooling of the output circuitry.
Designed for rack mounting, the 9440A occupies only four vertical units of rack space.

http://greatplainsaudio.com/wp-content/uploads/2016/06/9440-01.pdf

https://www.radiomuseum.org/r/altec_lans_stereo_power_amplifier_9440a.html