The fully discrete API 505 was first released for the API 200 series many years ago and is now released by API in the 500 series format. Featuring propriatry API 2520 and 2510 op amps.
Featuring 55 db of clean gain, a thin to phatt tone control, 8k bright boost and load switches. The 505 also has a -20 pad and a thru jack output for passing the signal to an amp. Great meter and front panel Hi -z input jack. The 505 gives many tonal options for clean phatt guitar, bass or synthesizer. 400 or 100 k ohms switchable input impedence. Made in USA