The Q-AMP 4-Channel Stereo Headphone Amplifier from SM Pro Audio is a compact and durable headphone amplifier that allows up to 4 users to listen to the same audio sources. The amp has a durable extruded aluminum chassis that stands up to the demands of professional use. Inside, there are 4 individual amplifier circuits, each of which has SM Pro Audio's "E-Series" design and components to offer terrific audio quality and clarity with a wide frequency response and low distortion.
The rear panel has 2 stereo inputs, each with a pair of 1/4" connectors for separate left/right channel input. The front panel has 1/4" and 3.5mm headphone jacks for each channel to support a variety of different kind of headphones. Each output channel has a selector switch to alternate between the 2 input signals. Each channel also has its own volume control so users can set their preferred level without affecting others.
Note! This item can be rack-mounted with the Q-Rack adapter, available separately.
| # Of Channels |
Input: 2 Output: 4 |
| Frequency Response | 20 Hz - 20 kHz (0 dB ~ -2 dB) |
| Distortion | 0.02% |
| Signal to Noise Ratio | > 80 dB |
| Crosstalk Rejection Typically @ 1 kHz | > 72 dB (-20 dB input) |
| Gain Range | 40 dB |
| Controls and Indicators |
4 x Channel selector switches 4 x Volume knobs 1 x Power LED |
| Connectors |
2 x Stereo 1/4" TRS inputs, unbalanced (2 jacks each, L/R) 4 x Stereo 1/4" headphone jacks 4 x Stereo 3.5mm headphone jacks 1 x DC power input |
| Input Level | +25 dB |
| Input Impedance | 47k ohms |
| Output Level | 300 mW @ 32 ohms (max 1 W @ 32 ohms) |
| Output Impedance | 22 ohms |
| Output Gain | +20 dB |
| Construction | Extruded aluminum |
| Dimensions (HxWxD) | 1.75 x 19 x 8.5" (45 x 483 x 217 mm) |
| Weight | Approx 2.2 lbs (1 kg) |