YAQIN TUBE AMPLIFIER, MS-34B, EL-34, UL 38W TR 26W

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PID# 53198

CA$1,400.00

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Description

SPECIFICATIONS:

  • Gross weight: 25.5kg
  • Distortion: ≤1.0%
  • Input sensitivity: ≤260mV
  • Load impedance: 4Ω-8Ω
  • Net weight: 23kg
  • Frequency response: 10Hz-48KHz(-2dB)
  • Signal to noise ratio: ≥ 90dB (A-weighted)
  • Maximum power consumption: ≤250W
  • Electronic tube: EL34×4,6H8C×2,6H9C×1
  • Maximum output power: UL38W×2(8Ω),TL26W×2(8Ω)
  • Size: 400mm × 355mm × 220mm (W × L × H)

Features:

  • Solid aluminum alloy rotary button
  • High-quality tin-sprayed double-sided copper-plated epoxy fiber board, circuit specification reduces distortion and improves signal-to-noise ratio
  • The front stage uses 6H8C and 6H9C common cathode amplification and long tail reverse drive, and the rear stage uses Czech EL34 II
  • The components are all hand-welded, and the lines are neatly distributed
  • High quality gold-plated resistor
  • Using high-end brushed panel, exquisite workmanship, excellent hand feeling
  • High voltage power supply for the automatic delay control, can effectively extend tubes life.
  • Switch between ultra-linear (UL) and three poles (TR) connection mode, to meet different user needs.
  • Function with Bluetooth5.0
  • Select imported WIMA (MKP10) Philips capacitors and high-precision Japanese original ALPS special potentiometers

Speakers connection

  • All tube amplifier used with stereo mode: L(left) and R(right) speakers.
  • Normally there are 6 speaker cable connectors: +8L, +4L, -0L, -0R, +4R, +8R
  • Example: +8L and -0L are for connecting with your Left 6-8ohms speaker
  • -0R, +4R is for connecting with your Right 4ohms speaker

The main factors affect the sound quality of vacuum tube amplifier

1. Single-ended and class AB1 circuit

At the end of the power amplification, amplification of push-pull is easier to get high power output, because push-pull is a vacuum tube amplifier "+" signal, a vacuum tube amplifier "-" signal, and then superimposed, so large distortion. Single-ended amplifier is a vacuum tube amplifier "+, -" signal, does not need the signal superposition, therefore less distortion. The sound Single-ended than push-pull good, especially in some minor details. However, Single-ended is difficult to obtain high power output, with vacuum tubes of the same type, Single-ended can do 10W, while push-pull is easy to do 30W, Single-ended to obtain large power will have to pay more price.

2. push-pull end power amplifier of vacuum tube different connections

push-pull the end of the power amplifying vacuum tube usually have three connections: triode form, super linear form and standard form. Theoretically speaking, the triode form by minimum distortion, output power is minimum; standard form get larger distortion, power is also the maximum; between super linear form between.

3. Affect the power transformer and output transformer of sound

High quality vacuum tube amplifier inseparable quality transformers, power transformers currently technically no trouble, the output transformer is the decision of the vacuum tube amplifier sound quality is the key. Because regardless of the output transformer selection is good, how sophisticated technology, both methods exist to avoid leakage inductance and stray capacitance components, resulting phase distortion. Output transformer as inductive element, to the transmission signals of different frequencies have different inductance. Therefore, the output of the transformer will be different in different voices lead. No high-quality output transformer, other aspects of the production of better quality vacuum tube amplifier is also meaningless.

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