SAS Audio Labs is happy to unveil the two stage 25 Watt push pull, all triode, pure class A monoblock amplifiers, built in the USA. It uses the very conservatively rated EL-156 output tube.
Unique features include individual power supplies for each stage, a two position tonal balance switch for touch up, 4 - 8 ohm speaker tap switch, and a unique 60 hz hum cancelling circuit (not a typical filament balancing design) that one can virtually eliminate 60hz hum. The monoblocks sound simply stunning with the Von Schweikert VR-3, VF-33, GR Research, Selah Phast Jr speakers etc.
Specifications:
Frequency Response: 7.5-80khz (8 ohm) -3db.
Power Output per Channel: 25 watts RMS (switchable 4, 8 ohm, triode Pure Class A)
Sensitivity: 2.5 vrms approximately
Input Impedance: 100k ohms
Global Feedback: 0
Total Weight ea.: 27 lbs. (Shipping Wt. 30 lbs)
No. of Stages per Channel: 2
Driver Tube: JJ E88cc triode (approx 1/8 the distortion of NOS or 6SN7 types)
Output Tubes: EL-156
Driver Stage Distortion: 0.03% THD (at 25 watts output)
Total Harmonic Distortion Amp: typical 0.7% at 25 watts
Power Requirements: 120vac 60hz
I believe in complete separate power supplies to minimize frequency dependent musical feedback through the power supply. (Musical feedback occurs in nearly every single amplifier despite decoupling capacitors. See
http://www.sasaudiolabs.com/theory8a.htm .) This results in a more natural sound and realistic 3D soundstage. Transparency is simply incredible.
More information can be found at:
http://www.sasaudiolabs.com/25ppt.htmCheers.
Steve Sammet
SAS Audio Labs
503 W. Jefferson St. #2
Morton, Illinois 61550 (near Peoria)
http://www.sasaudiolabs.comsasaudio@omnilec.com
(309) 263-0736 (noon to 6pm Monday - Friday)
