Why You Need The Retro Instruments 2A3 Dual Channel Tube Program Equalizer: Retro Instruments take on the classic Pultec EQP-1A3 Maintains many of the features of the original with select upgraded features Added peak frequencies for more precise control Improved Low End Performance Designed for stereo usage with hand matched pots to ensure both channels are identical Industry-standard Passive EQ with authentic feel, controls and equalization curves Easily recallable 100-position knob scales on boost and cut controls Transformer Balanced and fully-floating 600 Ohm Input and Output to eliminate ground-induced hum and noise Design minimizes tube heat generation High stability components used throughout Manufactured in the USA Vintage Design for modern recording Retro Instruments is changing the way the world sounds by creating classic style audio gear for modern recording. Retro products keep what made the originals the best of the best, updating vintage design with modern features to improve functionality - creating unique and innovative gear that sounds, looks, and feels vintage and state-of-the-art in equal measure.