Electronic Audio Experiments Dagger V2

The Electronic Audio Experiments Dagger is a simplified and miniaturized iteration of the Longsword op amp drive. We streamlined the circuit into its core gain stages and dual band shelving EQ, for the ideal match of simplicity and flexibility.

The process of editorializing the Longsword circuit let EAE rexamine the quirks and unique rough edges of earlier versions. In particular, we noticed that at higher gain settings, the EQ can be used to further overdrive the output stage for extra piercing or fuzzy tones. While not a traditional use case, we fell back in love with that sound and incorporated those design elements into the Dagger. In addition to being a great fit for smaller pedal boards, the Dagger also stands on its own as a unique drive pedal.

Controls:

• Volume: output volume, self explanatory

• Drive: turn clockwise to increase the amount of overdrive

• Low/High: James/Baxandall tone stack (shelving filters)

• Shift (toggle): Adjusts the low frequency contour. Up produces a thicker sound, and down produces a tighter sound.

Changelog

• V2 (current as of July 2021)
  - New mechanical format (updated enclosure, knob spacing, etc.)
  - Added soft-touch relay bypass switching
  - Added Shift toggle
  - More robust power supply and EMI filtering
  - Updated Low/High EQ points to match Longsword V4.5 update

Electrical Specifications

Bypass: Relay switching with true bypass

Input impedance @ 1 Khz: 500kΩ

Output impedance @ 1 Khz: <25K (passive volume control)

Power: 9-18V DC, 2.1 mm center negative barrel. The current draw is 50 mA.

We recommend a regulated, isolated power supply rated for 100 mA minimum. The PSU input is protected against reverse polarity. The Dagger can be operated at 18V for more headroom and clarity.