This is similar to the API 3124+.

The WA-412 provides 4 channels of classic American console preamps in a sleek 1RU design. This style of preamp is often referred to as "the sound of Rock n' Roll" for its BIG punchy low end and smooth open top end. The price/performance ratio of the WA-412 is almost unfathomable to the experienced studio engineer who has possibly paid much more for preamps of this style during their career. Featuring fully discrete socketed 6-pin opamps and custom wound Altran USA input and output transformers, the WA-412 leaves nothing to be desired. If you are looking for multiple channels of world class tone in an affordable package, the WA-412 is the right choice for you.

• 4 channel microphone preamplifier + instrument DI
• Custom Altran USA Transformers
• Fully discrete, transformer coupled, through-hole component topology
• X520 discrete op-amp in every channel
• 65dB of gain per channel