Tube model：2pcs 12AU7 or ECC82. Assembled Board：have tested it well ！（Not included tubes）.
eBay
The HiFi Magic 6E2 Tube Phono Preamp by Douk Audio is a high-quality audio preamp designed for turntable stereo systems. With both headphone jack and stereo RCA outputs, this black preamp unit is perfect for enhancing your home audio experience. The analog inputs and outputs, along with its compact design, make it a versatile choice for audiophiles looking to upgrade their sound system. Enjoy crystal-clear sound quality with this sleek and powerful Hi-Fi amplifier.
eBay
T4 PRO tube preamp meets more HiFi needs: MM phono input, converts phono signal to line level signal, with low-noise integrated circuits and high-quality components to ensure clear and clean sound. 3.5mm AUX input, amplify the low level audio signal from your phone, tablet, PC, MP3 etc., easier to drive amplifier or active speaker and greatly improve the sound quality. Imported JAN5654 tubes and vintage warm sound: default comes with JAN5654 tubes, improves everything associated with your music such as detail, transparency, immediacy, richness, dynamic, tone etc., much better than 6J1 series especially in human voice. Pluggable tube socket for tube rolling and sound-shaping, easy to pick from and alter the sound signature to one's preference.
eBay
Confirmed working; sound was confirmed. This is sold as-is. Images only. I promise fast shipping via FedEx or DHL as soon as possible! Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges.
eBay
Passive preamp, suitable for the audio signal input such as mobile phone, computer, CD/MP3/MP4 player, LP and other media streaming players so on, and match power amplifiers, active speakers and some monitor audio devices very well with lossless sound quality.
eBay
Based on the classic Naim NAC52 power amplifier circuit. Japan 1% high-precision photo-cathode resistance. Assembled Board:have tested it well ! 8 BC axial capacitors.
eBay
This is our latest product, with reference to the Lehmann headphone amplifier circuit, PCB layout, chassis shape, component selection are very close to the original machine. Operational amplifier selection: Lehmann original machine is the use of OPA2134PA dual op amp, our headphone amplifier factory is also standard with this op amp.
eBay
BC capacitance. SCR /ERO coupling capacitance. Reference famous Conrad-Johnson CL Circuit, designed with double-single independent design, physically separated 100% left and right channels, independent hierarchical grounding.
eBay