DESCRIPTION
The SUT 9226(XL) step up transformer is a passive device that use the
Lundahl 9226 or 9226XL transformers and provides control of gain, load,
and input connectivity.
The gain is selectable 1:5 (14db), 1:10 (20db), 1:20 (26db), input can be
selected balanced or un-balanced, and loads from 60-400 ohms.
RECOMMENDATIONS
To get the best from this step-up transformer, Alpha2delta Audio
suggests some recommendations.
Mains purification
One of the worst sources of noise and hence degradation of the small
signals that the SUT has to amplify is from the mains powering the
amplifiers that the SUT feeds. Purifying, isolating, and cleaning the
mains, specially removing DC offsets makes a big and noticeable
difference to the sound quality. Alpha2delta Audio recommends the use
of Puritan Labs mains purifiers such as the PSM136 with Puritan mains
leads.
.
Cables
Use only the best quality interconnect cables, Alpha2delta Audio
recommends solid silver interconnects with shielding (to reduce hum to
minimum) to maintain the philosophy of silver in the design of the SUT.
The recommended length of the cable is 0.5m to a maximum of 1.5m.
Burn-in
As expected, this product needs to have a suitable length of burn in
time, some of this will have been done at Alpha2delta Audio before the
unit is shipped as part of its quality control but the quality of the sound
will improve over time.
Switch on warm up time
The SUT does not need any warm-up time, though as in most
components it will give its best results with stable temperatures. If this
device is close to a heat source it may require the area temperature to
stabilise for peak performance.
