The Alto DI4 professional multi-function 4-channel DI box is perfect for live and studio applications requiring a quality DI. It’s ultra-flat frequency response (via a renowned balanced output transformer) and convenient rack-mountable design make it a must-have for both live sound reinforcement and studio recording applications.

CleanBOX! Its RCA-to-XLR channel 1 takes RCA signal, matches the signal levels and then provides a balanced (XLR) output.

The new dPDB™ Passive Direct Box features two high-quality direct boxes in one portable enclosure. It is a rock solid, roadworthy DI for connection of the outputs of electronic musical instruments (or other audio sources) to the balanced inputs of mixer consoles and other balanced inputs. It also allows connection of a music source to an instrument amplifier while simultaneously patching it to a mixer.

ART MyMONITOR between the mic and line source, and the mixer. The Mic and line Monitor levels can then be adjusted for mix and volume through the headphones. Only the mic signal will go to the board. And since MyMONITOR can be AC or battery powered, the unit can be used on a large stage or wherever there is no AC outlet nearby. Dynamic or condenser mics can be used since phantom power would come through the Mic Thru jack from the mixer or other source.

The PDB™ Passive Direct Box is a rock solid, roadworthy DI for connection of the outputs of electronic musical instruments (or other audio sources) to the balanced inputs of mixer consoles and other balanced inputs.

Condenser microphones usually specify different requirements for their phantom power. These ratings can range from 48 Volts all the way down to 9 Volts. Fortunately, there’s a certain amount of flexibility with matching Phantom Power voltage to your mic. A rough rule-of-thumb would be "more is better."

Different condenser microphones specify different amounts of required phantom power. As a rule these ratings can range from 48 volts all the way down to 9 volts. Fortunately, there is some flexibility in terms of matching phantom voltage to your mic. A rough rule of thumb would be "more is better."

There are occasions when a number of mono sources or a stereo source and/or instruments need to be mixed down into a mono signal. This might be a matter of inserting one or two keyboards plus a stereo tape or CD track into one mixer channel for PA or recording purposes or simply into an instrument amp or powered speaker.

If encounter a problem were you need to add 3 mics to a mixer, which only has one available channel.  Then the simple solution is to insert a ProMIX between the mics and the mixer. Each mic channel on the ProMIX has both phantom power and low-frequency cut selectable via DIP switches plus a level control. The balanced XLR line output can be connected to a mic input on the mixer and headphones or a powered monitor can be connected to the Phone/Aux output. And if AC power is not available, the ProMIX runs on batteries as well.

The T8™ (Transformer Eight) a high quality totally passive audio interface that uses 8 transformers to separate input and output signal grounds, thereby isolating two systems and reducing hum and ground-loop noise. The T8’s audio transformers have flat and wide frequency response and handle high signal levels while maintaining an isolated balanced output.