Let us introduce the four members of the Grimm Audio company:

Bruno Putzeys
Electrical Engineer. Has been active since 1995 designing class D power amplifiers for high-end and consumer audio applications, digital and analogue deltasigma and PWM modulators, AD/DA converters and discrete solid-state analogue audio circuits. Has further experience with vacuum tube electronics and loudspeaker design. Now working for Hypex, he was formerly employed at Philips where he invented, among others, the "UcD" power amplifier circuit.

 

Peter van Willenswaard
Electrical Engineer. Owner of company Audiomagic. Specialized in upgrades for digital audio equipment and upgrades for and repair of tube audio equipment. Design and construction of analog and digital equipment for consumer and professional clients. Former technical editor of Dutch pro audio magazine Pro-Audio&Visie (1989-1993). Long career as technical audio journalist (since 1982).

 

Guido Tent
Electrical Engineer. Runs the Tent Labs company. Develops,
manufactures and supplies low jitter clock upgrades for digital
products like CD/DVD players, ADCs and DACs. Consultant in the area of EMC, RF electronics and signal integrity. Career in analog electronics, RF and EMC (silicon and system design). Formerly employed at Philips Optical Storage where he was involved in the design of DVD-R pick-up units.

 

Eelco Grimm
Sound Engineer. Owner of the Fairytapes company for recording and acoustic consultancy. Former editor in chief of the leading Dutch professional audio magazine Pro-Audio&Visie (1992-2000). Writer of the book (with test cd's) 'Checkpoint Audio'. Teacher and researcher at the Utrecht School of the Arts, Media and Technology. Co-inventor of the 'Omnisurround' solution for realistic surround acoustic reproduction.