DACT Technical info

DACT

Danish Audio ConnecT. Technical info. On the following pages, DACT is providing technical information related to audio. The purpose is to let the readers know the reasons for the technical details and designs behind DACT products. We hope that the technical articles published here will not only increase the understanding of our philosophies, but also be a valuable source of information and tools for audio DIY enthusiasts and audio equipment manufacturers.

SMD
At DACT we make use of Surface Mount Device (or just Surface Mount) components in our products.
DACT believes strongly in using SM components for high quality audio equipment. Read more about one of the main DACT design philosophies.

CT102 versus batteries.
DACT has made objective measurements proving that our CT102 audio power supply module may be better than other power sources for audio - even better than batteries.
Read more here.

Switch cleaning
In rare cases it will be required to clean the contacts on at DACT attenuator or a DACT input selector switch.
Read here why and how to do.

Does this look like a conventional leaded resistor?

Guess so, because that’s what it is.
Try to click on the resistor image to see what a leaded resistor really contains.

DACT Attenuation Curve Calculator

Download for free the DACT Attenuation Curve Calculator: A useful tool to assist DACT customers and others interested in designing their attenuator / volume control circuit correctly. The ACC is especially useful for calculating passive volume controls (passive preamps).

”Re-programming” of CT3 selector switches

Download the PDF file here

Passive preamp
Article about passive volume controls (often called passive preamps).
Advantages/disadvantages and main issues to consider when designing and using a passive volume control. Read here.

DACT Pre-Attenuation Calculator

Download for free the DACT Pre-Attenuation Calculator (Microsoft Excel): A useful tool to assist DACT customers and others interested in designing their attenuator / volume control circuit correctly.
Wiring diagram here.