It featured three gain settings (+36, +40, and +46), and a fine trim knob that allowed the user to trim gain by a few dB. The D4 has expanded that range from +20 up to +60 using a 12 step rotary attenuator.
Like the original design, the D4 trim control allows the user to fine tune the gain by 2-4dB depending upon the gain switch setting. The sound is huge and open heard on albums recorded by. It has incredible detail, and the kind of wonderful coloration that only an EF86 pentode can deliver.
Its often considered to be the sound of John Lennons Revolution, which used two console channels in series to achieve an overdriven sound. Signal path transformers are custom wound right here in Chicago. Theyre based on the transformers used in the original, but they take advantage of modern materials.
The input transformer is a hi-nickel (80% nickel content) and the output transformer is a lo-nickel (50% nickel) for excellent fidelity. The power supply is internal. Its built around a Japanese Nippo Steel R-core power transformer.
It has extremely high efficiency and low noise compared with traditional E-I core transformers and plays a significant part in achieving the D4s low noise performance. The item "Dizengoff Audio D4 Mic Preamp" is in sale since Thursday, October 20, 2016. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "ersatz007" and is located in Perkasie, Pennsylvania. This item can be shipped to United States.