Summit Audio 2ba-221

Note: Used 2BA-221 from Summit Audio. Good condition. See photos for cosmetic condition. 6-month warranty.

Tube and Solid-State Microphone Preamplifier

The Summit Audio 2BA-221 combines tube and solid-state technology with separate signal paths and high-quality components. A dedicated power source drives the 48V phantom power without drawing current from the main circuits.

Flexible Connectivity

Multiple input and output options make it easy to integrate the preamp into both studio and live setups. The construction is robust and designed to withstand intensive use.

Adjustable Tube Output Stage

The variable tube output control allows a wide range of tones, from clean solid-state signals to harmonically rich textures. The built-in 12AX7A tube delivers a warm character and can be easily replaced.

Adjustable Microphone Impedance

A variable mic input impedance enables tonal shaping for each microphone, allowing sound variation without changing equipment.

Specifications

• Dimensions: 4.44 × 21.59 × 18.85 cm
• Weight: 3.15 kg
• Power Supply: Internal AC, 20 W, 115 V 50/60 Hz (USA), fuse 0.5 A at 100/115 V, 0.25 A at 230 V
• Input Impedance: Mic 1.5 kΩ, Hi-Z 10 kΩ–1.75 MΩ
• Output Impedance: 150 Ω (XLR)
• Connections: Mic input XLR, line input 1/4" balanced, outputs XLR + 1/4" balanced, stacking in/out
• Max Input Level: Mic −16 dBu, Line 22 dBu, Hi-Z 15 dBu
• Max Output Level: 25 dBu (XLR)
• Max Gain: 75 dB
• Equivalent Input Noise: −135 dB (10 Hz–20 kHz)
• Frequency Response: 10 Hz–50 kHz (−1 dB)
• Signal-to-Noise Ratio: 115 dB (10 Hz–20 kHz)
• THD + Noise: 0.055% at −32 dB in, +4 dB out, 1 kHz
• Tube Type: 12AX7A