Barcus-Berry Universal Interface model 3500A

Barcus-Berry Model 3500A Universal Interface / Piezo PreampUp for sale is the Barcus-Berry Model 3500A Universal Interface. If you perform with acoustic instruments—whether it's an acoustic guitar, violin, cello, banjo, or mandolin—and fight with weak signals or harsh high-end, this active direct box and preamp is a legendary utility fix.The 3500A is a dedicated impedance-matching active direct box built specifically to tame the harshness of piezo crystal pickups. Boasting a massive 2.2 Megohm input impedance, it restores the warm, full-range, natural low-end of your acoustic instrument while sending a perfectly balanced signal straight to a recording interface, pedalboard, or front-of-house PA system. ey Features:

• Impedance Matching Architecture: Seamlessly accepts inputs from all high-impedance piezo pickups, eliminating signal loss and thin, tinny tone.
• Onboard 2-Band EQ: Dedicated Bass, Treble, and Volume knobs give you immediate, precise tone shaping directly at your fingertips.
• Internal Gain Adjust: Features an internal gain trimmer providing up to +12dB of clean active boost to optimize your instrument's output level.
• Road-Ready Build: Housed in a heavy-duty, all-metal chassis with Barcus-Berry's classic green finish.

Technical Specifications:

• Frequency Response: Ultra-wide 5Hz to 30kHz
• EQ Control: Treble (+/- 12dB @ 10kHz) | Bass (+/- 12dB @ 100Hz)
• Input Impedance: 2.2 MΩ
• Output Impedance: 1 kΩ
• Power Source: Runs on a standard 9V battery with an incredible ~1,000-hour battery life (No external DC jack).
• I/O: 1/4" Mono Input, 1/4" Mono Output
• Made in the USA [1]

Condition & Inclusions:

• Condition: Excellent
• Included: Preamp only