The WA-412 provides 4 channels of classic American console preamps that provide big punchy low end and smooth open top end. If you are looking for multiple channels of world class tone in an affordable package, the WA-412 is the right choice for you. Output Trim is available on every channel for precise control and creative gain staging. A Tone switch (transformer input impedance) is also available on each channel, which allows you to choose between a warm and punchy classic console tone, or go for a more open & neutral sound. SPECIFICATIONS: • 4 channel microphone preamplifier + instrument DI • Fully discrete, transformer coupled, through-hole component topology • Altran USA custom wound, premium input and output transformers • X520 discrete op-amp in every channel, socketed for convenience. can be user-replaced with • Most 6 pin, discrete op-amps for varying flavor & tone • 65DB of gain • Tone button input impedance - switches from 600 ohms to 150 ohms (affects the tone of both the mic and hi-z inputs) • Inputs - microphone xlr & active instrument 2meg ohm hi-z • Outputs - transformer balanced xlr & trs4 • -20db pad - pads both mic and instrument di inputs both the hi-z inputs) • Self noise: