Description
UsedManual: https://www.hilberink.nl/luxman/5l15/lux-5l15.pdf DC configuration pre-main amplifier of the laboratory reference series.The 5L15 incorporates the equalizer circuit of the preamp 5C50 into the power amplifier 5M21 of the Laboratory Reference Series.The 5L15 consists of an equalizer consists of an equalizer circuit and a power amplifier circuit. It employs a DC amplifier configuration to faithfully amplify all program sources, thereby eliminating phase distortion in the low range and transient distortion in the high range.5L15 solves the problem of DC-drift due to changes in temperature and other external conditions. This problem is solved by installing a DML-IC (Dual Monolithical Linear-Integrated Circuit), which contains a newly developed FET-based differential-amplifier circuit, a supplementary cascode circuit, current mirror circuit, constant current circuit, and other circuits.In order to eliminate the notching distortion that is a problem in power amplifiers, the elements used in the output stage have been studied and the switching speed of the driver stage has been improved in a circuit manner. Thus, the level of notching distortion is higher than that of A-class operation in spite of AB-class operation.The cascode circuit, current mirror circuit, emitter follower circuit, constant current drive circuit, etc. are arranged in the right place in order to make all circuits show the maximum power, which is useful for improving basic performance and preventing DC drift.It is designed with the minimum necessary functions, and all sound adjustment functions such as tone control are omitted.It is equipped with a large power meter of independent right and left channels which displays average output at 8 ? load in W.This meter is equipped with a range switching function.Equipped with a DC offset sensor, it can check DC component is input from the outside.In addition, it is equipped with an input capacitor IN/OUT switching function so that when a DC component appears at the output terminal, it can be cut off at the main input.It is equipped with a preset attenuator, two types of tape monitor function, and a tape dubbing function.As a protection circuit, a DC drift detection circuit and an excess input detection circuit that work to protect the speaker when a DC voltage of ± 2.5 v or more appears at the output terminal or when an excess input is input, and an eddy current prevention circuit that prevents the power transistor from being damaged by an eddy current when a short circuit occurs at the speaker terminal or the terminal of the speaker system.In the Laboratory Reference Series, in which legs are attached to the lower part and metal brackets are attached to the upper part, and these are supported by metal supports, so that when the product is stacked, an excessive load is not applied to the product lying below.In addition, the legs and brackets fit together perfectly so that they do not slip or fall over.As an optional part sold separately, there was a standard rack mounting bracket of EIA standard. TypePower Amplifier with DC Configuration PrepsContinuous effective output80W + 80W (8 ?, simultaneous operation of both channels, 20 Hz to 20 kHz)Total harmonic distortion factor0.02% or Less (8 ?, 80W, 20 Hz to 20 kHz)Cross modulation distortion factor0.02% or Less (8 ?, 80W, 60 hz : 7 khz = 4 : 1)Output bandwidth5 Hz to 100 kHz (8 ?, 0.1%, -3dB)Damping factor80 or More (8 ? Load, 1 kHz)Input sensitivityPhono:2.7mVTuner, Aux1/2, Main in : 300 mvSignal-to-noise ratio (IHF-A curve correctionInput short)Phono : 80 dB or moreTuner, Aux1/2, Main in : 100 dB or moreFrequency characteristicPhono : 20 Hz to 20 kHz ± 0.2 dBTuner, Aux1/2, Main in : DC to 100 kHzOutput voltagePre out : 300 mV (standard)Rec out : 300 mV (typical)Protection circuitDC offset sensorSpeaker protection circuit with DC drift detectionEddy current prevention circuitAttachmentIndependent power meter for left and right channelsMeter-range switchingInput capacitor IN-OUT switchingTerminal for peak indicator connectionHeadphone jackPhono subsonic circuitTape monitor (2 systems)Tape dubbing circuitAttenuatorPower consumption380W (8 ?, both channels operate simultaneously, at rated output)External dimensionsWidth 442x Height 146x Depth 400 mmWeight13.3kg Important Note on Shipping: eBay estimates of shipping costs are not accurate and do not include insurance or adult signature requirement. Please contact us for a more accurate quote. No shipping to Vietnam, China or Hong Kong. Please do not submit payment until you have received an invoice from us with accurate shipping costs. We reserve the right to hold the item or cancel the transaction if actual shipping costs are not paid.
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