Version Description:
Version 1: Retro Version Complete Kit (with High-End Tubes)
Version 2: Retro Version Complete Kit with Built-in Bluetooth (with High-End Tubes)
Version 3: Standard Version Complete Kit (with Standard Tubes)
Version 4: Standard Version Complete Kit (with High-End Tubes)
Version 5: Standard Version Tube-less Kit (without Tubes)
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New Release: Spartan K1 (6N8P/6SN7 + 300B + 274B/5U4G) Tube Amplifier Kit
Major Announcement: Starting today, the black-base 274B rectifier tube will be upgraded free of charge to a Linlai Hi-Fi ceramic white-base 274B, offering a more coordinated and aesthetically pleasing appearance. No separate photos will be provided. This is for your information!
In response to strong demand from audio enthusiasts, we are launching this high-power, high-drive single-ended tube amplifier to satisfy friends who prefer amplifiers with greater power output. This unit retains the advantages of pure tube single-ended design, delivering a warm, rich, and captivating sound that seems to linger in the air!
Starting today, the Standard Version chassis will be upgraded free of charge to feature knob switches, symmetrical on both sides, for a more beautiful and elegant look. No separate photos will be provided. This is hereby announced.
Sonically, the characteristics of the 300B tube are particularly prominent. Reproduction of vocals, violin, and light music is exceptionally sweet, while maintaining a solid foundation with noticeable thickness. The highs are transparent and detailed. The bass is not exaggerated but has adequate punch. The 300B creates a unique soundstage—some describe it as rich in harmonics, giving the amplifier a slight, natural reverberation effect, resulting in a large, three-dimensional soundstage. In terms of drive, the three frequency ranges transition naturally, producing a relaxed and open sound. Personally, we find the 300B adds significant coloration, imparting a touch of sweetness to everything it plays, which is very pleasing to the ear. Detail retrieval is excellent in the highs, mids are prominent, and bass performance is commendable. In short, it's the top choice for vocal music, truly worthy of the title "Tube King 300B"!
This amplifier employs the industry-recognized classic 6SN7 driving 300B circuit. Proven in practice, this circuit offers sufficient gain, ample drive voltage, low distortion, and superior performance. We can say no expense was spared on components: a massive 114x70 power transformer (350W true power, the highest among similar kits) and massive 96x45 output transformers (using new old-stock Z110.35 cores, wound with a premium 4+3 method, the highest among similar kits)!
Specifications:
Power Transformer: 114*70, 350W true power, massive size, using new premium-grade laminations *1 (The largest among 300B kits)
Output Transformer: 96*45, 520W, premium 4+3 winding method, using new old-stock imported Shin-Nittetsu 0.35mm Z11 laminations *2 (The largest among 300B kits)
Choke: 57*25, 4H, using new premium-grade laminations *2
Tubes (Standard): Shuguang 6N8P / Linlai 300B-G *2 / Linlai 274B *1
Tubes (High-End): Linlai 6SN7 / Linlai 300B-G *2 / Linlai 274B *1
Output Power: 8W + 8W
Frequency Response: 18Hz - 25kHz
Output Impedance: 4Ω and 8Ω
Signal-to-Noise Ratio: 89dB
Input Sensitivity: 500mV - 1000mV
Input Impedance: 100kΩ
Harmonic Distortion: 1% (1kHz)
Dimensions: 370mm (L) * 290mm (D) * 220mm (H)
Weight: Approx. 21kg
Friendly Reminders:
Due to the specialized nature of kits, components cannot be returned or exchanged once soldered. Please check all parts immediately upon receipt. Contact customer service within 48 hours for any missing or incorrectly shipped items. DIY tube amplifier assembly requires some foundational knowledge. Our store provides schematics, physical layout diagrams, and comprehensive technical support. However, if you find DIY challenging, you may consider purchasing the assembled unit from our store.
The products we sell are DIY kits. It is difficult to achieve perfection, and extreme perfection is not possible. If you have any opinions or suggestions, please contact customer service. We will strive to resolve any issues.
We carefully pack every tube amplifier. Upon receiving your shipment, please inspect the packaging thoroughly first. If damaged, refuse the delivery and contact us immediately. Otherwise, we may not be able to assist.
This tube amplifier does not include a power cord or audio cables.
The tube amplifier MUST be connected to speakers before powering on, as the output transformer requires a load. Failure to do so can easily damage the output transformer!
Placing an order indicates your agreement to the above terms and conditions.
