Benchmark LA4 Reference Line Preamplifier Silver
LA4 is a stripped down 'line-amplifier only’ variant on Benchmark Media’s HPA4 headphone amplifier and is designed to bridge the gap between reference quality converters and power amplifiers.
Features
- Remote Control (sold separately)
- Low-Noise Line Amplifier
- 256-Step Fully-Balanced Relay Gain Control
- Precision Timed Relay Closures
- Precision Metal Film Resistors
- Gold-Contact Relays
- Touch Screen Control
- 2x Balanced Stereo Line Inputs
- 2x Unbalanced Stereo Line Inputs
- 1x Balanced Stereo Line Output
- 1x Unbalanced Stereo Line Output
- 1x Balanced Mono Sum Output
- 2x Bidirectional 12V Trigger Ports
Armed with relay gain control, relay input selection and relay muting all via the finest gold-contacts available, the LA4 is able to keep distortion and noise minimal across the full range of volume stages.
Each gain control features 256 steps in 0.5dB increments - one for then input gain and two for outputs (left and right). The precise timing of each relay closure ensures that each attenuator delivers a silky-smooth volume curve for ultimate delivery and performance.
The LA4 is a perfect partner for Benchmark sister products such as the DAC3B or any converter without analogue line outputs.
Specifications
- THD: < -125 dB (0.00006%)
- SNR: 20-20 kHz (unweighted) @ > 135 dB
- Frequency Response: -0.003 dB at 10 Hz, -0.001 dB at 20 kHz
- Impedance: 60 Ohms
- Noise: < 1.9 uV at Unity Gain, 20-20 kHz
- Max Voltage: 20 Vrms (+28 dBu)
- Crosstalk: < -133 dB @ 1 kHz, -116 dB @ 10 kHz
- Dimensions: 220 x 99 x 212mm (WxHxD inc feet), 3.63kg
