Description

FX-AUDIO TUBE-03J Vacuum Tube Hybrid Preamp Tone Control Black Description Vacuum tube hybrid preamp with tone control! Is renewed This product is a hybrid type preamplifier that combines a vacuum tube and an operational amplifier. The volume and sound quality are adjusted by the operational amplifier placed in the front stage, and the harmonic component is added by the vacuum tube in the rear stage. You can enjoy it. In addition, we have achieved a low price and an affordable price while introducing high-quality parts with a good reputation everywhere so that they can be used for full-scale audio applications. Renewal to the 3rd lot from sale on June 17, 2021 This time, there are no major changes that affect the circuit and sound quality of the main board. ・ Change of power supply decoupling capacitor ・ Other minor parts changes Renewal to the second lot from January 11, 2019 sale The LED emission color under the vacuum tube has been changed from red to a white emission color similar to other TUBE series. * Please note that the color may differ slightly depending on the lot. [How to use] Please use this product by inserting it between the output of a sound source playback device such as a CD player, DAC, or silicon player and the power amplifier. INPUT: Connects to an analog output terminal such as a CD player or DAC. OUTPUT: Connect to the analog input terminal of a power amplifier, main amplifier, etc. * Please see the attached manual for detailed handling instructions. [Product features] ■ We adopt 6K4 as standard attached vacuum tube TUBE-03J used a 6J1 military tube for the attached vacuum tube, but since 6J1 is already difficult to obtain, TUBE-03J + uses 6K4 as standard. The design itself is based on 6J1 and has been adjusted so that there is no problem with 6K4, but we recommend 6J1 (sold separately) to experience the original ability. It's not that 6K4 isn't good, it's a difference in taste, so it's one of the pleasures of TUBE-03J + to try your favorite vacuum tube. ■ Hybrid preamplifier with vacuum tube and operational amplifier Texas Instruments audio operational amplifier "NE5532" (DIP socket type), which has high cost performance in terms of sound quality, is used for the front buffer section and tone control section! By making the latter stage a hybrid configuration of a vacuum tube circuit and making the best use of the advantages of the vacuum tube and the operational amplifier, you can enjoy high-quality sound with depth and taste. ■ Tone control function (tone direct function) Equipped with BASS / TREBLE tone control, you can set the sound quality to your liking. In addition, by passing the tone control circuit with the tone direct function, both pure high-quality sound and the desired sound quality are realized. ■ Gain setting function The DIP switch on the back of the main unit allows you to set the gain in two stages, High / Low. ■ Equipped with a power supply active filter circuit using a power transistor The active filter circuit using a power transistor eliminates the noise of a step-up power supply circuit for a vacuum tube, and aims at high-quality sound by supplying the optimum clean power source for operation of an operational amplifier. ■ Commitment to adopted parts For important parts that affect sound quality, we are improving the quality by using products from Japanese and European manufacturers. [Op Amp-Vacuum Tube Coupling Capacitor] -Uses the well-established WIMA film capacitor for audio. [I / O coupling capacitor] ・ Uses a custom-made metallized film capacitor made by BC Components (formerly PHILIPS, now VISHAY) [Previous stage amplification / tone control circuit operational amplifier] -Adopts the well-established Texas Instruments "NE5532" audio operational amplifier. ・ A capacitor made by a Japanese manufacturer is used as the power supply decoupling capacitor for the operational amplifier. [Post-stage vacuum tube circuit high voltage power supply unit] ・ A capacitor made by a Japanese manufacturer is used as the decoupling capacitor. ■ Improved characteristics by reviewing artwork -The layout of surface mount components has been thoroughly reviewed, the component spacing has been widened, and distortion due to interference has been eliminated. -The operational amplifier section in the previous stage uses the potential difference of the ground to eliminate noise, and the vacuum tube circuit section is isolated from Betagland so that it is not affected by the ground. Artwork suitable for hybrids helps improve characteristics. ■ Full-scale drive even at DC12V, noise countermeasures by boosting are perfect Achieves high-voltage power supply drive, not just the tinsel of simply passing a signal at low voltage! Despite the easy-to-use low-voltage 12V single power input (AC adapter drive), it is boosted to 100V internally and driven to a high voltage so that the characteristics of the vacuum tube can be exhibited. In addition, the effect of noise has been eliminated as much as possible by isolating the booster circuit itself with a metal shield. ■ Aluminum alloy body The hairline-processed body and machined front panel create a luxurious and profound presence. [Recommended power supply] Recommended AC adapter: [Maintenance / optional parts] 【please note】 * AC adapter is sold separately. Please purchase the recommended AC adapter at the same time. * This unit is a preamplifier. A separate power amplifier is required to connect to passive type speakers (not built-in amplifier). * There is no phono equalizer function. To connect to an analog player, connect to a player with a built-in phono equalizer, or a separate phono equalizer is required. * There is a high voltage part inside, and if you touch it, you may be injured by electric shock. Also, do not disassemble or modify it as it may cause a fire. * Although the vacuum tube is new, it may be dirty or dull because it is a dead stock product. Please note that it does not affect the quality and sound quality. 【spec】 Brand: FX-AUDIO-Product model number: TUBE-03J + Color: Black Product warranty period: 6 months from the date of purchase Input terminal: Stereo RCA terminal Output terminal: Stereo RCA terminal Function: Tone control function (BASS / TREBLE) / Gain Setting function (High / Low) / Tone direct function Power supply: Rated voltage DC12V Power supply capacity 1A or more (AC adapter sold separately) Power connector: DC jack Outer diameter 5.5mm Inner diameter 2.1mm (Center plus specification) Accessories: Instruction manual 6K4 2 vacuum tubes (type is a pair of dawn, Beijing, Shanghai, you can not choose) Size: Height 33 mm (maximum 76 mm including vacuum tube) x width 98 mm x depth 118 mm (* excluding protrusions) Main body Weight: 318g (when the attached vacuum tube is attached) * Specifications and design are subject to change without notice due to improvements, etc. Payment You can pay with management payments. We will ship the item 10 business days after your payment clears. Shipping I ship it in Japan post EMS or DHL or FedEx . I attach the tracking number. Please bid it without worrying. Shipping is only available to the address registered in Paypal. Please note that any address not registered in Paypal is not acceptable to ship. International Buyers - Please Note: Hello, As I have earned only a few feedbacks, you may be very worried to bid my auction. However, I will provide courteous and responsive service. If you are looking for a particular item that is not in my listing, please do not hesitate to contact me. I will look it for you. Thank you, Arigatou. International buyers Please note Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying. Cancellation after ordering will be subject to PayPal transaction fees. Refund amount will be refunded minus the fee. In the case of long-term absence or refusal to receive due to customs duty, a return fee will be charged. Be sure to pick up your luggage. Provided by HARU eBay listing tool.