EnglishEnglish  DeutschDeutsch  РусскийРусский  FrançaisFrançais  EspañolEspañol  日本語日本語  SvenskaSvenska  ItalianoItaliano  한국어한국어  NederlandsNederlands  
Original OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output Amp

Original OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output Amp

Original OPA-3A
Price: $2,358.99 USD

:



Come with Tube cage cover:



Ship to: Shipping Costs :

On-time Delivery and One-Year Warranty.

Pay With Brank Tranfer of %5 Discounts.

Click Here

Function Description:
1. the input part
With balanced and RCA mode selection, the balanced input uses a high-quality op amp to convert the balanced signal into an unbalanced signal, which is adjusted by the AN audionote volume potentiometer and input to the amplifier circuit.
2. the output part
There are external speaker function and headphone output function, in which the earphone can select four-core balanced output and 6.5 single-ended output. The four-core balanced output is isolated and amplified by the output transformer, and the balanced signal of positive and negative waveform is output by special process. Push the balance headphones.

Features:

  • The whole machine adopts high quality PCB welding to ensure stability and uniformity.
  • EI type output transformer with two high-quality broadband high-quality sound quality Japanese Z11 iron core
  • Use high-power Z11 iron core EI type power transformer specially designed for this machine
  • the high pressure part uses 274B/5U4G for bile rectifier
  • The front stage uses two 12AU7 vacuum tubes, and the latter stage uses two 300B vacuum tubes for Class A single-ended power amplification. Fully reflect the 300B's unique, smooth, transparent personality.
  • the input has BALANCE / RCA selection
  • the headphone output can choose four core balanced output and 6.5 output
  • with an external speaker function
  • boot mute delay function (about 30 seconds)
  • power input selection Furutech (Furuhe) FI-03 with insurance power tailstock
  • the power switch uses the British RS silver-plated contact power switch
  • the signal input uses the US original CARDAS (Cadas) RCA signal socket
  • the volume potentiometer selects the British original AN audionote
  • Easy-to-install plug-in vacuum tube protection cover

Technical Parameters:

  • Rated output power: External speaker output: 8W+8W (when 4-8Ω load)
  • Balanced headphone output: 4500MW+4500MW (at 32Ω load)
  • Single-ended headphone output: 1000MW+1000MW (for 32Ω load)
  • The whole machine frequency response: 20Hz ~ 50kHz (-1.5dB)
  • Harmonic distortion: 0.5% (1kHz)
  • Signal to noise ratio: 89dB
  • Input sensitivity: 220mV
  • Input impedance: 100kΩ
  • Left and right output balance: <0.5dB
  • Use vacuum tube: 12AU7 x2, 300B x2, 5U4G x1
  • Machine size (WxDxH): 360mm x275 mm x170 mm
  • Net weight: 20kg
  • Working conditions: Temperature: 0 ° C ~ 40 ° C Humidity: 20% ~ 80%
  • Storage conditions: Temperature: -20 ° C ~ 70 ° C Humidity: 20% ~ 90%

  • Headphone output mode is variable voltage output
  • Output impedance: speaker 6Ω headphone 64Ω
  • Output impedance when the headphones are balanced: 64Ω 6.5 output 32Ω

 

Original OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output AmpOriginal OPA-3A 300B Vacuum tube Amplifier HiFi Headphone Balance output Amp


These is no reviews about this product. Write a Review

About Us:
1. Please don't hesitate to contact us with any queries or comments about our items or your problem.
2. Please note that we are open Monday to Sunday between 8:00 Am to 24:00 PM Beijing Time.

Payment:

1. We only accept Paypal,Escrow,Credit card.
2. Please pay within 7 days of order.

Shipment:

1. We send out items within 48 hours and give you the tracking numbers.
2. Delivery by DHL, UPS, FedEx, EMS in 3-7 business day.Free shipping only by China Post Air Mail ,usually you will receive in 15-55 business day, or sometimes even longer.
3. All items come from no smoke store and special care.
4. Shipping way will depend on your order quantity,sample order will be sent by China post.

Return & Refund:

1. In case you received a wrong item, Items must be returned in its original and unused condition & must also be in its original box and packing.
2. We do not allow refunds or exchanges because of change of mind. Please read all description provided as a guide before you bid. While every step has been taken to ensure that we ship out correct item, there will be occasion when you receive items that are different from the description. In such case, we ask that you contact us immediately so we may remedy the situation. Your satisfaction is important to us and we value your business.

Note: During holiday ,pls allow us to response you early next week ,kindly not leaving negtive/neutral feedback or make dispute/claim out of our working hours, thank you for your cooperation.