300B SE Amplifier (Amazon)

300B amp를 좋아하는 사람 많이 있다.
Amazon에서 “300B tube amplifier”로 search 해서 찾았는데…

REISONG BOYUU A50 MKII 300B Tube
HiFi intergrated Amplifier Single-end Class A
by BOYUU

가격이 너무 싸다.
Total $700 이내
($514.11 + $169.75 shipping)

나는 이런 비용으로 결코 만들 수 없다
틀림없이 수정을 해야 할 것이다. (대략 $300+ 예상)
그래도 값이 싸다. 한번 해볼만하다고 생각한다.

입력 전압에 대한 걱정도 없다.
(60Hz/50Hz)(100V, 110V, 120V, 127V, 220V,240 version is in stock.)
다 해결해 준다고 한다.

위험은 있을 것 같지만… 해볼만 하다고 생각.
(상품 홍보도 아니고 원…)

REISONG BOYUU A50 MKII 300B Tube
HiFi intergrated Amplifier Single-end Class A
by BOYUU

Be the first to review this item
Available from these sellers.
With VU meters;Hand welding point to point
Power output tube: 300B × 2 (Brand PSVANE)
Power Transformers: new imported 0.35, stack thickness 60MM (114-60).
Output amplifier core: core 0.35 new imported thick high silicon (86-50).
Some of Senior audiophile optimization the electric circuit,it is better at aroma, intermediate frequency and bass.
Compare with similar items
New (1) from $514.11 + $169.75 shipping

Product description
Features:
If you listen the Boyuu A50 MKII Amplifier, you will know 300B is good at bass too.
Imported 0.35 core output amplifier audio dedicated core, core stack thickness 86-50, A20 flux of 13,000.
Output transformer potting techniques, ensure that the output of the amplifier stability and reliability
Double chassis design. U-shaped steel chassis thickness up to 2.4 mm thick
Output amplifier with a new imported 0.35 core manufacturing, high-purity copper wire package enameled
Imported 0.35 thick core manufacturing power amplifiers
Output amplifier with high-grade stretch amplifier housing cover.
Power Transformers: new imported 0.35, stack thickness 60MM (114-60).
Output amplifier core: core 0.35 new imported thick high silicon (86-50).
Japanese production of ALPS potentiometer.
Chassis: imported mirror stainless steel chassis.
Aluminum panel: high-grade aluminum CNC machining, anodic surface treatment.

Specification:
Voltage amplifier tube: 12AT7 × 1
Voltage push tube: 6P6P × 2
Power output tube: 300B × 2 (Brand PSVANE)
Rectifier: 5Z3PAT × 1
Output power: 8.2W x 2 (Class A)(no feedback technology)
Frequency response: 30Hz – 42KHz
Output impedance: 4Ω, 8Ω
Total harmonic distortion: ≤ 1% (1kHz)
Input sensitivity: 750MV
Input impedance: 100KΩ (3 group of input jacks)
Volume: 375 W x 290 D x 180 H mm
Packing volume: 500 W x 450 D x 290 H mm
Signal to noise ratio: 89DB
Net Weight: 18 KG
Gross weight: 21 KG
Input Power Voltage: AC110V – AC120V(60Hz/50Hz)(For United States)
If you need other voltages, please contact us first.
AC100V- AC240V
(60Hz/50Hz)(100V, 110V, 120V, 127V, 220V,240 version is in stock.)
Package included:
Boyuu A50 MKII KT88 vacuum tube intergrated amplifier:1
Power cable with plug of your national standard: 1

가격과 제품의 유무는 수시로 바뀝니다.

그리고…

Nobsound 300B 6N8P Integrated Vacuum Tube Amplifier
HiFi Stereo Class A Single-Ended Audio Amp
by Douk Audio

가격이 너무 싸다.
$850.00 & FREE Shipping. Details & FREE Returns

나는 이런 비용으로 결코 만들 수 없다
틀림없이 수정을 해야 할 것이다. (대략 $300 예상)
그래도 값이 싸다. 한번 해볼만하다고 생각한다.
입력 전압에 대한 걱정도 없다.
AC230V or AC115V(switchable)
다 해결해 준다고 한다.

위험은 있을 것 같지만… 해볼만 하다고 생각.
자신 있게 만들었다고 내부도 공개했다.
잘 만들었다.

Nobsound 300B 6N8P Integrated Vacuum Tube Amplifier
HiFi Stereo Class A Single-Ended Audio Amp
by Douk Audio

5.0 out of 5 stars 1 customer review
Price:$850.00 & FREE Shipping. Details & FREE Returns
Pay $47.22/month for 18 months, interest-free with your Amazon Rewards Visa Card
| Try Fast, Free Shipping
All-bladder circuit design: 2*6N8P front-stage tubes, 2*noble voice 300B power tubes and 1*RUBY 5AR4 rectifier tube.
All fire: EI105 power transformer, EI86(Z11) output transformer, EI48 filter inductor and all large filter electrolytic capacitor
High quality gold-plated RCA lotus socket and horn socket
All-mirror stainless steel body, front and rear 8 mm thick space gray aluminum panels, double inside and outside packing box
Compare with similar items
New (2) from $850.00 & FREE shipping. Details

Product Introduction
Parameters & Features
Input impedance: 100K Ω (RCA)
Output impedance :4 Ω and 8 Ω
Output power: 10W (pure class A, 8 Ω load)
Frequency response: 20Hz ~ 20KHz (-1db)
Total harmonic distortion: <1% (20hz-20khz)
Input sensitivity: 300mV ~ 600mV; Total gain: 32dB
Signal-to-noise ratio: >85dB (noise < 1.5mv)
Operating voltage: AC230V or AC115V(switchable)
Shape size: 335 * 265 * 165mm (L * W * H)
Net weight: 15.5kg; Gross weight: 18kg
Single-Ended Class A, 2*6N8P front-stage tubes, 2*PSVANE 300B power tubes and 1*RUBY 5AR4 rectifier tube.
EI105 power transformer, EI86(Z11) output transformer, EI48 filter inductor and all large filter electrolytic capacitor
High quality gold-plated RCA and speaker terminal
All-mirror stainless steel body, front and rear 8mm thick aluminum panels

가격과 제품의 유무는 수시로 바뀝니다.

19 thoughts on “300B SE Amplifier (Amazon)”

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