McIntosh MA252

Preamplifier Stage: Two 12AX7a and two 12AT7 vacuum tubes
Output Stage: Direct-coupled solid-state amplifier
Power Per Channel: 100 Watts into 8 Ohms / 160 Watts into 4 Ohms
Number of Channels: 2
Total Harmonic Distortion: 0.03% maximum from 20Hz to 20kHz
Signal To Noise Ratio:

• Signal To Noise Ratio (Moving Magnet): 80dB
• Signal To Noise Ratio (High Level): 97dB

Frequency Response:

• Frequency Response +0,-0.5dB: 20Hz to 20kHz
• Frequency Response, +0, -3dB: 10Hz to 100kHz

Impedance: 4 or 8 Ohms
Inputs: 2 Unbalanced, 1 Balanced, 1 Moving Magnet
Outputs: 1 Subwoofer (mono)
Headphone Outputs: 1/4" High Drive
Headphone Amplifier: 1/4" High Drive; powers all headphones from 20 to 600 Ohms
Tone Controls: Bass and Treble
Power Requirements: 120V 50/60Hz, 3.7A
Weight: 28 lbs (12.7kg) net, 37 lbs (16.8kg) in shipping carton
Dimensions (W x H x D): 12" (30.5cm) x 7-5/8" (19.4cm) x 18" (45.7cm)
Product Manual: Download