- #Benchmark ahb2 power amplifier for sale full#
- #Benchmark ahb2 power amplifier for sale professional#
The volume control knob features a high-quality optical encoder that is rated for heavy use. Help screens explain the special functions. The touch screen provides easy access to advanced features such as balance control, input level offsets, input names, screen dimming, remote control, and function locking. The trigger ports are compatible with most industry-standard trigger input or output ports, but can communicate bidirectionally with other Benchmark products. The trigger signal controls the power-up and power-down sequencing of the entire audio system. Two bidirectional 12V trigger ports can be used to link the LA4 with external D/A converters and power amplifiers. With the LA4 or HPA4 inserted, the DAC3's 32-bit digital gain control is replaced by a more-resolving fully-analog relay gain control. The LA4 or HPA4 can be inserted between a Benchmark DAC3 and AHB2 without degrading the system noise performance. The LA4 and HPA4 are the only line amplifier/preamplifiers that we recommend inserting between a DAC and the AHB2. In contrast, other preamplifiers limit the system noise performance because they cannot match the SNR performance of the AHB2.
#Benchmark ahb2 power amplifier for sale full#
This means that the LA4 will extract the full performance of the AHB2. The LA4 (line amplifier) or HPA4 (line amplifier + headphone amplifier) are the perfect complement to the Benchmark AHB2. These may be the only preamplifiers or line amplifiers that exceeds the signal to noise ratio of the ultra-quiet AHB2. When paired with a Benchmark DAC, a single remote control will operate both units. The LA4 is designed to work with the Benchmark DAC2 and DAC3 converters but may be driven from any high-end D/A converter. The LA4 includes IR remote control and can be operated using the optional Benchmark remote. The line amplifier provides one balanced stereo output, one balanced mono sum, and one unbalanced stereo output.
The LA4 features two balanced stereo inputs and two unbalanced stereo inputs. 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.
#Benchmark ahb2 power amplifier for sale professional#
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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