Mackie 800R owner manual DB25 Connectors, Analog, Digital

•When connecting an unbalanced output to a bal- anced input, be sure that the signal high (hot) connections are wired to each other. The unbal- anced ground (earth) connection should be wired to the low (cold) and the ground (earth) connec- tions of the balanced input. If there are ground-loop problems, try disconnecting the unbalanced ground (earth) connection from the balanced input ground

(earth) connection, leaving the unbalanced ground connected to the balanced input low (cold) con- nection only.

In some cases, you may have to make up special adapters to interconnect your equipment. For example, you may need a balanced XLR female connected to an unbalanced 1/4" TS phone plug. Many common adapters can be found at your local electronics supply store.

DB25 Connectors

Analog

The BALANCED LINE LEVEL INPUTs and BALANCED LINE LEVEL OUTPUTs on the back of the Onyx 800R provide balanced inputs and outputs for channels 1-8 on two female DB25 connectors. These connectors are pin-for-pin compatible with the analog (not TDIF) DB25 connectors found on TASCAM DTRS recorders, which has become an industry standard for many professional audio manufacturers. They are also the same pinout as the analog cards for the Mackie D8B and hard disk recorders.

Each DB25 connector provides eight balanced line- level inputs or outputs.

Analog DB25 Line-Level Input and Output

Several companies make DB25-to-DB25 cables specifi- cally for audio, with proper shielding to reduce crosstalk and noise.

DB25 cables that break out to XLR, 1/4" TRS, or TT connectors for connecting to other mixers or audio gear are also readily available. See your Mackie dealer for details.

Digital DB25 AES/EBU Output

If you have this output configured for S/PDIF, which is an unbalanced output, the connector is wired as follows:

INPUTS NOT

USED ON

ONYX 800R

(110 Ω TERMINATION)

25 24 23 22 21 20 19 18 17 16 15 14

Digital DB25 S/PDIF Output

If you are using the DUAL WIRE position with the higher sample rates (88.2 kHz and up), the same cabling that you use for the SINGLE WIRE position will work as long as you have it connected to another device using the same method.

Note: A variety of alternate pin-out configurations have been developed by various manufacturers for the AES/EBU DB25 interface. Make sure the device you are connecting to has the same pin-out configuration as the Onyx 800R. If not, you will need to make a conversion cable so the signals arrive at the correct pins on the receiving end of the cable.