What Are They? And Why Are They Useful?
A few times recently we have run into venues and sound technicians that donʼt know about how useful these little Direct Boxes are so we thought this would be a great tech tip to cover. We hope you learn something new and would love to answer any other questions you might have.
A direct box is a device used to interface a guitar or keyboard to a sound system. Inside the box is a set of transformers or coils of wire. The windings of these coils change a signal from high impedance to low impedance. Instruments usually have a high impedance signal because it is a stronger and higher quality signal, however, this signal type has some negatives. It is prone to interference over even short distances and it usually does not interface well to a sound board with low impedance “pre-amped” inputs. Plugged straight into a sound board with an adapter cable instead of a direct box, a guitar will be too loud, and have hum or interference. A direct box allows for a short un-balanced high impedance cable to be correctly converted to a low impedance signal. It then sends the signal down a balanced cable to the sound console.
We always recommend having a few of these around as part of your “problem solver kit”. If you want to know how to integrate these little boxes into your system, contact us anytime!
Or Text 22828
All of the Lambda Staff contribute to the Blog. If you have any questions about the info we provide, please don't hesitate to ask!
Check out our resources page for FREE checklists and tools we mention in articles! We are here to help you improve and maintain your Audio Visual Systems!