Avondale Audio 1981- 2013 | www.avondaleaudio.com | All rights reserved
Tel: +44 (0) 1246 200096

Avondale Audio
The Hollies
2 Avondale Road
S40 4TF
For more information please download our brochure on our range of regulator modules.
Our objective with the TPR2, (Tracking Pre Regulator), was to
produce the simplest circuit capable of supplying clean DC
current to an item of audio equipment with none of the
drawbacks of the LM317 circuit while maintaining ease of use
and set up within a modest footprint.

We've exploited the feedback system of the LM317 in such a
way as to eliminate as many of the limitations of this device as
is possible. Using twin LM317s in a configuration where the first
device is used provide DC current to the second whilst at the
same time, tracking the output of the second device in a
precise way.

Not content with this improved configuration, we've utilised a
precision voltage source, impervious to fluctuations, to provide
an all important stable voltage reference for the voltage

Capable of delivering over one Ampere with suitable
heatsinking, the TPR2 offers rejection of line borne interference
by an order of magnitude resulting in a blacker audio
background than can be otherwise experienced and because
the reaction times to deliver transient current are faster, musical
notes have that extra precision in tempo. Even more crucial, is
the ability of the TPR system to stop when the transient
requirement has ended meaning less of the smearing effect
sometimes noticed in heavy bass lines.

Hight quality double layer PCB
Solid copper heatsink 
Tight tolerance SMT resistors
Extremely precise voltage reference IC
Quality miniture electrolytics and film capacitors
Voltage trim positioned on PCB for easy adjustment