Power audio station 2 x 100 W

This is a complex and complete power audio station (at the bottom in above image) with one stereo output and 6 stereo channels input (three of them can be mixed) that includes several stages of amplifiers. It took me a couple of years to build this unit and in 1988 was ready for use.

Technical specification includes:

-power supply: mains 230V/50 Hz
-max current load from mains power supply: 1A
-output impedance for loudspeakers: 2-50 ohm
-recommended impedance for loudspeakers: 2-8 ohm
-maximum measured audio output power (before limitation): 64 W SIN / 4 ohm (16 V ef / 4 ohm at 1000Hz)
-input adapters for: microphones, electromagnetic audio transducers, quartz piezoelectric transducers, line-in standard inputs etc
-mixer amplifiers: 6 inputs on each channel switchable in different combinations. On each channel there are potentiometers that allow the mixing of three signals simultaneously.
-audio filters: 3 active filters on each channel: RUMBLE, LOUDNESS, HISS
-tone correction, Baxendall type with BASS and TREBLE
-one level indicator on each channel, with the possibility of measuring output level on loudspeakers or on mixer output.
-monitor connector and switch with the possibility to insert other audio stages in the signal chain ( EQUALIZER, DNL or guitar effects for example).
-several electronic protections for loudspeakers, including DC signal protection, timer on power on, instant disconnect on dangerous events
-metal aluminium case

Amplifier technical manual (in Romanian language)

Disclaimer: The information on this web site is provided "AS IS", without warranty of any kind. The author has made the best efforts to ensure the design and the information provided are reliable. Under no circumstances shall the author be liable for any direct, indirect, incidental, special or consequential loss, damage, expense or injury incurred or suffered which is claimed to resulted from use of this site, even if expressly advised of the possibility of such loss, damage, expense or injury, including, without limitation, any fault, error, omission, interruption or delay with respect thereto.