Rens Heijnis                                      custom-built audio equipment

Equipment modifications include design and installation of:

• improved analog electronics for pre-amplifiers, recorders, AD and DA converters and other audio equipment
• various extra options to existing mixing tables and other audio equipment
   

A few examples of  modifications

Teletronix (popular tube compressor) circuitry modifications: replacing the transformers for Jensen types Teletronix

 

Audio Developments portable mixer AD261:
replacing outdated opamps for modern opamps, replacing or removing electrolytic capacitors,
remove DG411 cmos switch., changing the ceramic capacitors for better sounding types

Modification of a Fostex active loudspeaker:
Talk Back speaker with light signal (recording signal for the musicians), stereo headphone output,
and relays control of the speaker,so that during recording there is no hum from the speaker to hear
 

Modified Neumann UM57 microphone: the original sound was sluggish, dull and to little low frequencies.
After changing some capacitors, the microphone is now fuller, more responsive and a more richer sound.