LA4 line preamplifier from Benchmark Media
Rear input panel of the Benchmark LA4 line amplifier
Benchmark LA4 Reference Line Preamplifier

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.

£2999.00 inc VAT
IN STOCK
SKU BM-LA4/B
EAN 602573174241

  • 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.

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