"The Drawmer S3 3U - Three Band Stereo Vacuum Tube Opto-Compressor. Superb Ivor Drawmer designed, ‘Signature Series’, 3-band tube compressor. The Drawmer S3 Stereo Three Band Tube Compressor incorporates the very latest in Ivor Drawmer designs and the aim from the very beginning was to create a ‘no technical compromise’ circuit using only the highest grade components. The S3 forms the basis of a ‘Signature Series’ and offers previously unattainable control and tonality over each of the three bands - gain control at each stage provides precise spectral balancing. The signal path consists of high performance input/output transformers, passive components and 10 x tubes (8 x ECC83 and 2 x 12BH7) configured as a fully balanced Class A design. Because the LDR’s (Light Dependent Resistors) in the compressors are temperature sensitive the S 3 houses an ‘electronic oven’ which provides and sustains the optimum LDR operating temperature - thereby maintaining calibration accuracy and improving performance. A front panel LED indicates temperature status. Large scale VU meters can be switched to ‘Peak’ mode to show transient information. Two further VU meter re-scale modes are available (+10dB and +20dB) to accurately display the unit’s ability to output levels of up to +30dBm. The master output section includes controls for both Gain and stereo balance to compensate for source material with a Left/Right imbalance or disproportionate processing. The main features of the Drawmer S3 include: Fully balanced signal path Class A design Isolation transformers in and out 20 x active tube stages High power ‘push/pull’ output stage delivering up to +30dbm Variable band split points Fast reacting ‘oven’ controlled ldr’s to maintain calibration accuracy Switchable ‘peak’ or ‘vu’ metering to display transients Switchable +10db or +20db meter re-scale modes ‘Air’ mode for high band ‘Big’ mode for low band Switchable mute and bypass on each band Individual gain reduction metering on all bands"