Powering Sound Devices Products from AC
Most Sound Devices mixers, amplifiers, and recorders have external DC inputs. These inputs can be used with AC transformers (and switching power supplies) to provide power for their operation. The 302, 442, HX-3, MixPre, and MM-1 can be powered from external DC sources with voltages ranging from 5 to 18 volts. The 702, 702T, 722, and 744T can run on external voltages from 10 to 18 VDC.
XL-WPH2
Sound Devices XL-WPH2 can be used to directly power the following Sound Devices models:
- 302
- 442
- 702 - included with product
- 702T - included with product
- 722 - included with product
- 744T - included with product
- MixPre
It operates on voltages from 100–240 VAC, 50/60 Hz and ships ready to use, with a four-pin Hirose connector at the equipment end.
AC Adapters
Below is a list of adapters from Radio Shack that work with Sound Devices mixers and recorders. When using AC adapters for 7-Series recorders, make certain the supply provides between 10 V and 18 V and provides at least 24 watts. Note, the adapters listed below are all 115 VAC products and are not designed for use with 230 VAC.
| Radio Shack P/ N | Voltage | Current Capability |
| 273-025 | 6 V | 300 mA |
| 273-1766 | 6 V | 800 mA |
| 273-027 | 9 V | 300 mA |
| 273-1768 | 9 V | 800 mA |
| 273-1774 | 12 V | 500 mA |
| 273-029 | 3-12 V | 1000 mA |
| 273-1775 | 12V | 1500 mA |
| 273-028 | 1.5-12 V | 300 mA |
DC Plug for Hirose
The 302, 442, 702, 702T, 722, 744T, and MixPre use a four-pin Hirose connector external power. Sound Devices XL-H is a bare mating connector for use with 4-pin Hirose-equipped products. This connector is locking and designed specifically for portable use. For operation when using one of the AC adapters above, remove the attached, molded jack and connect the relevant mating jack. Make a note of the polarity of the adapter. The Hirose is wired as pin-4 positive, pin-1 negative.
DC Plug for Coaxial
Sound Devices MM-1, HX-3, and early versions of the MixPre and 442 mixers use a coaxial DC power connector. The mating, locking plug is available from Sound Devices as part number XL-DC.
Radio Shack’s Adaptaplug M, p/n 273-1716, which has an inner diameter of 2.1 mm and an outer diameter of 5.5 mm can be used for a non-locking connection with these units.
Voltage and Current Draw
All Sound Devices products use high-technology switching power supplies to provide internal operating voltages; there is no performance benefit from running the units on a particular voltage. As long as the voltage and current rating meet the product specifications, the unit will operate to its published specification.