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Find here a selection of useful and/or essential accessories for this product. These are specially selected by the Audiophonics team according to the characteristics of the product.
The Benchmark LA4 is a high-end, low-noise, low-distortion preamplifier. It incorporates relays for gain/volume control, mute functionality and input selection. Its amplification circuitry is entirely analog. Gain/volume control features 256 levels of 0.5dB each, for a high level of precision. In all, no less than 40 gold-contact relays are used to switch resistor networks and ensure the LA4 preamplifier's operation. A remote control and touch-screen display provide easy access to the LA4's various settings. Connections include 2 balanced XLR and 2 RCA inputs, as well as a stereo RCA output and a stereo XLR output. There's also a bridged mono output on an XLR connector and two 3.5mm trigger 12V jack connectors. The LA4 is the perfect complement to the brand's AHB2 power amplifier.
The benchmark LA4's all-analog circuitry provides an optimum sound signal path for much lower noise and distortion than other devices on the market. The LA4 is specially designed for use with a high-end DAC and power amplifier. It can bridge the gap between a high-output DAC and a low-input power amplifier, and vice-versa.
The LA4 preamplifier boasts a bandwidth extending from 0.1hZ to over 500KHz. This ensures extremely precise sound reproduction, with clear, natural harmonics.
The L4A's front panel touchscreen provides easy access to settings such as balance control, input level offsets, input names, screen brightness and function lock. A volume control knob features a high-quality optical encoder and 256 volume levels with 0.5dB/step resolution. A remote control enhances the user experience. Also, an "audio dim" setting is accessible via the display, allowing you to instantly reduce the volume level by 20dB. This facilitates the transition between normal listening and background levels.
1 | 2x XLR balanced stereo input |
2 | 2x RCA stereo input |
3 | RCA stereo output |
4 | 2x Trigger 12V jack 3.5mm |
5 | Mono bridged output |
6 | XLR balanced stereo output |
7 | Power IEC / Fuse slot |
Technical characteristics
Specifications | |
---|---|
Product type | Preamplifier |
Inputs | 2x RCA stereo input 2x XLR balanced stereo input |
Outputs | 1x RCA stereo output 1x XLR balanced stereo output 1x Mono bridged output on XLR connector |
Bandwidth | 0.1Hz-500kHz |
SNR | > 135 dB |
THD | < 125 dB (0.00006%) |
Screen | Touchscreen |
Trigger | 2x trigger 12V jack 3.5mm |
Remote control |
BALANCED OUTPUT MEASUREMENT (BALANCED INPUT, +24DBU) | |
---|---|
THD | < -125 dB (0.00006%) |
SNR | > 135 dB, unweighted, 20-20 kHz > 137 dB, A-weighted |
Frequency response | -0.003dB to 10Hz, -0.001dB to 20kHz |
Bandwidth | -3dB exceeds 0.1Hz à 500kHz |
Output impedance | 60 Ohms |
Output noise | < 1.9 à gain unitaire, 20-20 kHz |
Maximum input and output voltage | 20Vrms (+28dBu) |
Crosstalk | < -133dB @ 1kHz, -116dB @ 10kHz |
General | |
---|---|
Alimentation | 100-240V AC 50/60Hz |
Power consumption | 12W (Typ.) 17W (Max.) |
Standby power consumption | 0.33W |
Dimensions | 220 x 985.5 x 211.5mm |
Weight | 8kg |
Color | Silver |
Package | 1x Benchmark LA4 preamplifier 1x Remote control 1x Power supply cable |