LUXMAN L-45A Premain Amplifier Maintenance and repair completed Works well F/S
- Condition: Used
- Price: 701.92 EUR
- Status: unsold
- Item number: 316168741633
- Seller: yunak547 (60|97.1%)
- Seller information: Commercial (with base shop)
- Item location: osaka
- Ships to: Worldwide
- Shipping: 0,0 EUR
- on EBAY
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Description
LUXMAN L-45A Premain Amplifier Maintenance and repair completed Works well F/SDescriptionUsed ; It has been confirmed to work. There are some small scratches due to age, but it is generally in very good condition.*Please refer to the images. Stereo pre-main amplifier with Duo Beta circuit.The Duo Beta circuit combines an appropriate amount of NFB and DC servo.The amplifier circuit and bare characteristics are improved and a low distortion rate is achieved by applying an instrumental amount of NFB.In addition, the DC servo system provides damped low-frequency reproduction.In addition, DC drift is suppressed, and ultra-low-frequency noise such as 1/f noise and flicker noise is eliminated, and low-frequency distortion during speaker drive is eliminated.A highly stable discrete equalizer and power amplifier are used to completely eliminate capacitors from the signal path from the cartridge to the speakers.The equalizer, which requires particularly high gain, is equipped with a newly developed FET input operational amplifier, which enhances the servo effect in the DC region and eliminates drift.Not only MM cartridges but also MC cartridges can be directly connected to the equalizer.The equalizer amplifier circuit uses a cascode-connected FET differential amplifier for input and a Class-A single-ended push-pull for output, resulting in a bare characteristic that is more than one digit better than that of conventional amplifier circuits.(In the MC-2 position, the input sensitivity is 0.28mV, allowing the connection of most MC cartridges, but we recommend the use of high-impedance types.A phono straight function is provided to make the DISC playback system completely independent.When the phono straight function is turned on, the input selector, recording output, balanced volume, etc. are disconnected, leaving only the DISC playback system completely independent, minimizing the effects of wiring and load.The tone control is integrated into the NFB loop of the power amplifier section to simplify the signal path.This not only simplifies the signal path, but also provides a straightforward change characteristic with no deterioration in the signal-to-noise ratio due to the use of only passive elements such as resistors and capacitors.For the base power amplifier section, high-speed switching transistors with high ft (high-frequency cutoff characteristic) and low Cob (collector output capacitance) are used for both the output and driver stages.The power supply section incorporates the features of both general constant voltage circuits and power supply circuits without feedback (stability in the DC range, excellent low-frequency braking power and sound extension in the audible range, and the ability to reproduce a sense of atmosphere, etc.), and further employs a circuit that eliminates the disadvantages.The basic configuration is based on a strong, low-impedance power supply with a large transformer and large-capacity capacitors, and the characteristics of this power supply are utilized in the audible band to add feedback from the low frequency range to the DC range to enhance stability and braking power. Condition/Maintenance Description Each volume switch cleaning Power supply relay cleaning.We have performed maintenance and servicing.All parts operate normally. Shipping Standard Shipping(Japan Post,FedEx,DHL) The package will arrive 5-14days after shipment.International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying. Thank you for your understanding.
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