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Summit Audio

2BA-221 PreAmp

Amplifier, Microphone

Main Details
Maker Summit Audio Company
Function
Form Factor Half-Width
Signal Path Analog Hardware
Made In Usa
Weight 3.15kg
Power Source Internal AC Supply 20 watts, 115, 50 or 60 Hz (USA)
Frequency Response 10Hz- 50kHz (-1dB)
Notes

Height:
1.75 inches (4.44 cm)
Width:
8.5 inches (21.59 cm)
Depth:
7.42 inches (21.59 cm)
Weight:
7 pounds (3.15 kg)

Power Configuration

Internal AC Supply
20 watts, 115, 50 or 60 Hz (USA)
Fuse size .5 amp, slo-blo for 100/115 V
Fuse size .25 amp, slo-blo at 230 V

Input Impedendance

Mic: 1.5K ohms
Hi-Z: 10K-1.75M ohms
Output impedance (XLR): 150 ohms

Connections
Size and Weight

Mic Input: +4 dB female XLR
Line Input: -10 dB 1/4" balanced
Outputs: +4 dB male XLR and 1/4" -10 dB balanced
Stacking Input/Output: -10 dB balanced

Max input level

Mic: -16dBu
Line: 22dBu
Hi-Z: 15dBu

Operating Measurements

Max output level (XLR): 25dBu
Max gain: 75dB
Equivalent input noise: -135dB average 10Hz-20kHz
Frequency response: 10Hz- 50kHz (-1dB)
Signal to noise ratio: 115dB average 10Hz- 20kHz
THD + Noise: 0.055%, -32dB in +4dB out, 1 kHz
Vacuum tubes: 12AX7A

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