This means that musical instruments are rendered without changing their sonic character. The LA4 will deliver musical overtones with life-like accuracy. Wave shapes are accurately reproduced, and the entire spectrum is delivered with precise timing. This means that the LA4 delivers very precise amplitude and phase accuracy over the entire audio bandwidth. The bandwidth of the LA4 extends from 0.01 Hz to over 500 kHz. In addition, it will match high-level professional balanced interfaces to low-level hi-fi balanced interfaces (in either direction). It will also provide an optimized interface to and from balanced and unbalanced devices. The LA4 will match high-output D/A converters to low-input power amplifiers and vice-versa. This optimization of the gain staging delivers the best possible system SNR for each volume setting. System OptimizationĪt any volume setting, the relay-controlled gain stage provides an optimized attenuator to match the upstream analog source to the downstream power amplifier. The LA4 eclipses the performance of typical high-end hi-fi preamplifiers by achieving much lower noise and distortion. The LA4 provides the ultimate analog signal path between inputs and outputs. The LA4 is designed to drive any professional or hi-fi power amplifier. It is designed to be driven from external D/A converters and external line-level analog sources. The LA4 includes 2 independent 256-step attenuators: one for the left channel and one for the right channel. To make this all happen, the LA4 includes a total of 40 precision relays that switch high-precision metal-film resistors. No other relay gain control offers this level of precision or performance. Relay closures are precisely timed to deliver silky-smooth volume changes. It also features a relay-controlled balance adjustment. The gain control has 256 steps in 0.5 dB increments. The entire system incorporates the finest gold-contact relays available. To solve this problem, the LA4 is completely relay controlled and features analog amplifiers with vanishingly low distortion. It features relay gain control, relay input selection, and relay muting. Most hi-fi preamplifiers introduce significant noise and distortion due to the necessity to provide volume control and input switching. The LA4 is a line-level preamplifier that is designed to sit between a reference-quality D/A converter and a reference-quality power amplifier. The LA4 is well-suited to customers who do not need the headphone amplifier. The LA4 is identical to the HPA4 except that it eliminates the headphone outputs. The LA4 is currently shipping from stock.
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