Summit Audio 2BA-221 Microphone and Line Preamplifier

The Summit Audio 2BA-221 Microphone and Line Preamplifier is a microphone/line preamplifier featuring continuously variable microphone impedance. The preamp utilizes separate and individually controlled solid state input controls to mix a microphone input with a Hi-Z or line input into a variable vacuum tube output. Using both the variable impedance and variable solid state and tube stages provides a high level of sonic control. It is is made with the highest quality full-voltage tube and solid-state signal paths and the best components available. The 2BA-221 even has a separate, dedicated power source for its 48V phantom power, and does not draw current away from the main circuits.

Variable tube output control

Another really cool feature is its variable tube output control, which provides access to a huge variety of tones, from clean solid state to rich harmonics and all sorts of variations in between. The 2BA-221’s single 12AX7A Tube provides rich, warm tone and is easy to find and replace.

Really well built

The Summit Audio design philosophy considers the entire package when it comes to crafting gear. It'specializes in the details of construction and have included many refinements over the years so units are durable enough to handle the rigors of the road. That is one of the reasons why you will find Summit gear on tour with many of today’s top touring acts around the world.

Key Features

• Single channel microphone/line preamp with variable input impedance from 100Ω to 10kΩ
• Hi-Z instrument, line and microphone level input
• Microphone and Hi-Z input available simultaneously with separate gain controls
• Three variable, independent gain stages
• Separate solid state and tube outputs
• Variable high-pass filter, 20dB pad and polarity reverse switch
• Insert jack for inputting an external processor
• Stackable with more 2BA-221’s to form a modular mixing device with individual outs, inserts per channel and a final vacuum tube gain stage

Technical Specs

Number of Channels

Single

Inputs

1 x XLR Microphone

1 x ¼” TRS phone line

1 x ¼” TS phone instrument (front panel)

1 x ¼” TRS phone “Stacking Input”

1 x ¼” TRS phone Insert

Output

1 x XLR

1 x ¼” TRS phone

1 x ¼” TRS phone “Stacking Output”

Phantom Power

48V

Multi-Function

No

Max Gain

75dB

Maximum Output Level

25dBu

Frequency Response

10 Hz - 50 kHz (-1dB)

Equivalent Input Noise

-135dB average 10 Hz - 20 kHz

Vacuum Tubes

12AX7A

Dimensions (WxDxH)

9 ½” x 8” x 1 ¾”

Weight

7 pounds (3.15 kg)

Specialties

Multiple simultaneous outputs with variable tube output gain