Echoes of Innovation: The Dynacord EC 504 Tape Delay/Reverb Saga

At the beginning of the 80’s, I started to play in the University rock group on the keyboard. We had half-professional audio equipment, and, as we were future radio engineers, we converted an old tape recorder into an echo creator, a kind of reverb machine. We could only dream about the Dynacord EC 504 as it was completely unrealistic.



The Dynacord EC 504 Tape Delay/Reverb is a formidable piece of audio equipment that combines the vintage warmth of tape delay with the spaciousness of reverb, delivering a unique sonic character that appeals to both seasoned professionals and enthusiasts alike. Made in Germany in 1978, with its robust build quality and intuitive controls, the EC 504 is a testament to Dynacord's commitment to innovation and excellence in audio processing.

The EC 504 boasts a sleek, compact design that belies its powerful capabilities. Encased in a durable chassis, this unit exudes reliability and durability, making it suitable for studio and live performance environments. The layout of controls is thoughtfully arranged, allowing for easy access and intuitive operation even in low-light settings. Furthermore, including high-quality components ensures longevity and consistent performance over time.

At the heart of the EC 504 lies its exceptional sound quality, characterized by the lush, organic tones reminiscent of classic tape delay units. The tape emulation circuitry faithfully reproduces the warmth and saturation inherent in analog tape, adding depth and dimension to the audio signal. Additionally, the reverb algorithm imparts a natural sense of space, enriching the sound with immersive reflections and decay. The EC 504 enhances the sonic landscape with its rich, textured sound, whether used subtly to add ambiance or dialed up for dramatic effect.

The EC 504 offers a comprehensive array of features that cater to the diverse needs of audio professionals. Key highlights include adjustable delay time and feedback controls, allowing for precise shaping of the delay effect. The tap tempo functionality further enhances usability, enabling users to synchronize the delay time with the tempo of the music effortlessly. Moreover, the unit features a dedicated reverb section with adjustable decay and mix parameters, providing flexibility in tailoring the reverberant characteristics to suit individual preferences. Additionally, the EC 504 offers mono and stereo operation modes, accommodating various setup configurations with ease.
Equipped with a range of connectivity options, the EC 504 seamlessly integrates into existing audio setups. Dual 1/4-inch input and output jacks facilitate straightforward connection to instruments, mixers, and other audio devices. Moreover, MIDI connectivity increases workflow productivity and opens new creative possibilities by enabling remote control and synchronization with external MIDI-enabled instruments.

With its intuitive controls, robust build quality, and exceptional sound quality, the EC 504 remains a worthy addition to any professional audio arsenal, offering endless creative potential for musicians, producers, and sound engineers. Whether used in the studio or on stage, this unit consistently delivers exceptional performance and sonic excellence, reaffirming Dynacord's reputation as a leader in audio innovation.