Many manufacturers, including past Purple Audio prototypes, use linear
power supplies for their racks. Traditional wisdom holds that linear
power supplies are ideal for audio and generate less noise and
interference. In many cases, especially with poorly designed "off the
shelf" switching power supplies, this is true. However, in the case of a
10 slot series 500 rack, even a well designed linear power supply
generates a substantial magnetic hum field and far too much heat to
allow for internal mounting. This problem is caused in part by the wide
variation of line voltage across the world. External power supplies are
cumbersome and inconvenient and consideration still has to be taken as
to their placement in relation to other equipment. With the advancement
of switching power supplies it is now possible to have a switcher that
does not compromise audio performance and delivers or exceeds all
specified current needs. Purple Audio has spent years perfecting just
such a power supply. They have comparatively tested all of theirs, and
many of their competitors, modules at full bandwidth (10Hz - 500kHz) on
lab quality over built bench supplies to make sure that the Sweet Ten is
not compromising audio performance in any way. Simply put, your 500
series modules will perform at their highest level in a Purple Sweet Ten rack. Audio performance improvements are considerable.
Features
10 Slot 500 Module Rack
Internal 150K switching supply
+/- 16VDC 1.5A
+48VDC 150ma
Second Balanced Output Utilizing Edge Connector 3 & 6
Second Balanced Input Utilizing Edge Connector 7 & 9
Front Handles
Locking Female XLR connectors
Ninth slot capable of accepting the Purple Audio Moiyn (8x2) Mixer Module (specs to come)
No PSU noise in adjacent slots
Rear Ground connector
Capable of putting out the 500 module current spec 1.3A from 90VAC to 240VAC 50/60hz
CE, ROHS, & WEEE Marked
The Sweet Ten top, side, and back panels are finished in trivalent
yellow chromate cold rolled steel instead of painted steel for improved
grounding and shielding. Purple Audio's ground plane motherboards
provide additional grounding. Additionally, the rack motherboard has
.1uf high frequency bypass capacitors at each slot to improve filtering,
especially for modules with DC/DC converters. Functionally, the Sweet
Ten offers 2 inputs and 2 outputs per slot. Many of the Purple modules
already take advantage of second output and the Moiyn mixer module will
use the second input to allow for stereo balanced source injection.
Future uses of these connectors include fader loops on future modules as
well as a few surprises!
