1: Support 4 way stereo audio inputs one way output. There are many tube preamp on the Internet design is not very reasonable. The main manifestation is that the distance between the Tubesis too close.
eBay
Beautiful sound AS-M7 HIFI Stereo Tube preamplifier Base on Marantz 7 Preamp original circuit
Aliexpress UK
Country/Region of Manufacture Japan. The wooden case looks like a newly made one, so it may not be a genuine product.
eBay
Hifi Classic Marantz 7 Circuit Tube Preamplifier Preamp Board / Kit /Pcb 12AX7 / 12AU7 Tube
Aliexpress UK
Batteries are not covered by warranty. Do not mark the value of the product below the value or mark the product as a gift. There may be cases where the product is only ONE item. Ruler is not included in the product.
eBay
Juson Audio JTA100 200W Tube Amplifier Vacuum Valve BT5.0 Hifi Stereo USB RCA Opt Remote Phono Headphone 2.1CH for Turntables
Aliexpress UK
Model: Tube-type Stereo Power Amplifier MARANTZ 8B. Depending on the country, used goods or certain product categories may be subject to import restrictions, special permits, or safety certifications.
eBay
2024 Latest Upgraded Front and Rear Power Amplifiers HIFI Stereo Toshiba Tube High Power Home High Fidelity Speaker Pure Power A
Aliexpress UK
1 Marantz 7 Tube preamplifier Note: T his list is not include the main power input cable. This preamp is reference the famous Marantz 7 Circuit, The human voice is natural and delicate, the strings are smooth, stretched, and the positioning and imaging are excellent.
eBay
Beautiful sound AS-M7 HIFI Stereo Tube preamplifier Base on Marantz 7 Preamp original circuit
Aliexpress UK
Condition is very good.
eBay
Douk Audio TUBE-T5C Stereo Valve Tube Preamplifier Mini 4-Way Audio Splitter Sound Selector Headphone Amp with VU Meter
Aliexpress UK
This kit will update one ST-70 or SCA-35 amplifier, or 2, Mark II, III, IV or Heath-Kit W-4 mono-block amplifiers, one Marantz 8B amplifier or one H-K Citation II amplifier. Sorry, but these will not fit the ST-35 amplifier.
eBay
Nosbound TUBE-T4C Mini Vacuum Tube Preamp HiFi Stereo Audio Preamplifier with Treble Bass Control
Aliexpress UK
The 2 preamp totally use 4pcs ECC83 (12AX7 is available),i will provide 4pcs Chinese made 12AX7 with the preamp.
eBay
High-end Dynaco 12AX7 ECC83 Push 6P14 EL84 Electron tube Amplifier Push-pull Stereo Electron Tube Amplifier Audio 2*10W
Aliexpress UK