SAS Audio Labs ^TM
Where Music Comes Alive ^TM
Established in 1996

Truly accurate music should not only tug at your emotions but captivate your very soul. Our audio amplifiers are designed to bring out the natural emotions experienced at a live event. Unique designs and sonically superior, neutral sounding parts are responsible for the incredibly detailed, accurate, and emotional experiences our customers enjoy. The cleanness, rhythm and pace, inner detail, soundstaging etc are extraordinary without being etched or syrupy, just natural.

We use:

• Unique hum balance control. Not your typical filament balance potentiometer.



• No hidden frequency dependent feedback through the power supply (see our White Papers).



• 2 position tone balance switch, to better match up with an individual system.



• No cathode followers (with their inherent 100% negative feedback) or interstage transformers.



• Minimal number of total stages.


1. Each added stage adds more parts, and each part adds its own distortons.



2. The harmonic distortions combine with other stages of the component to produce higher order distortions. For example: the distortion products from a second triode stage (typically 2nd and 3rd harmonics) combines with the distortion the first triode stage (again 2nd and 3rd harmonics) producing 4th, 6th, and 9th order products.
   
   Adding a third stage combines the above harmonics with the third stages harmonics and produces additional higher order products such as 8th, 12th, 18th, and 27th harmonics. Although smaller in magnitude, they are still present. Notice the higher the harmonic, the higher the "weighting factor", the less distortion percentage necessary to cause problems. Here are just a few harmonics and relative importance, quoted from the RCA Radiotron Designers Handbook, 4th edition, page 608. (Based on the ideal theoretical condition for equal intermodulation distortion.)
   
   Harmonic          Level (db)               Actual Distortion                Weighting Factor          Weighted Distortion
   
   2nd                         -20                               10%                                   1                                   10%
   
   4th                         -35                                  1.8                                    2                                     3.6%
   
   9th                         -65                                    .06                                  4.5                                    .27%
   
   14th                       -74                                    .02                                  7                                       .14%

As one can see, the higher the order harmonic, the less distortion required for one to perceive. Another point considers the stages in the preamplifier/amplifier. If two stages has extremely low distortion, the higher orders will be virtually non-existent (unless the third stage itself produces high order products). My preamplifiers and first amplifier stages are extremely low distortion, as each amplifier page shows. From all the above information, one can see why the whole design is important. By the way, our products last and last.

Ordering:

Each component page has the specifications and shopping cart.

Guarantee:

We offer a 30 day money back guarantee. See our Guarantee/Warranty Page