The S300 is a recreation of the 70s SVT preamp. Using three 12AX7 tubes at high voltage, this preamp is packed with powerful tone shaping capabilities. With outputs that can drive a power amp and a mixing board simultaneously, the S300 is the ideal preamp for any gig.
 
Later SVT designs added a master volume at the output of the preamp to enable fine tuning of the preamp gain. The S300 follows this principle, allowing you to balance the gain and volume settings for the right balance of tube harmonics and clean headroom. For authentic 70s SVT tones, set the master all the way up and use the gain to set the desired volume. This will provide the maximum clean headroom.
 
Features
Based on the 70s SVT circuit with three 12AX7 tubes
Bass and treble shelving EQ
Authentic inductor based middle EQ with switchable frequencies
1/4" line level out
Transformer balanced output with ground lift switch
Dual input/thru jacks for an unaffected parallel out 
Added master volume control at the output
 
Specifications
Preamp tubes: JJ ECC83s (12AX7) x3
Bass EQ: +/- 12 dB @ 40 Hz shelving
Middle EQ: +/- 20 dB @ 220, 800, or 3k Hz
Treble EQ: +/- 12 dB @ 4k Hz shelving
Ultra Hi: +15 dB @ 8 kHz
Ultra Low: -20 dB at 600 Hz (switch left), no effect (switch middle), -20 dB @ 40 Hz (switch right)
Balanced out: 20 dB below line level output
Dimensions: 9.5" wide, 8.5" deep, 2.6" tall, 5 pounds