CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  1. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  2. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  3. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  4. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  5. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.
  6. CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.

CHUBAN FM245 Audiophile-grade Balanced Preamplifier with RCA XLR output, low noise, and low distortion, suitable for home use.

$553.93

SKU: 1005010129230550 Category:
  • High-concerned chemical: None
  • Package: Yes
  • Channels: 2 (2.0)
  • Model Number: FM245
  • Maximum Power Per Channel: NO POWER
  • Brand Name: CHUBAN
  • Origin: Mainland China
  • Certification: CE

Historical Process
June 2022  Release
The indicator parameters and listening effects of this machine can be ranked at the Hi-end level!

Line features
Adopt FM245 flagship preamplifier line    The line, parameters and structure are exactly the same  Baidu
The core module is carefully matched, debugged, tested, produced and decrypted
One RCA single-ended input
There are RCA single-ended and XLS balanced two-way output at the same time  Can connect to 2 post-stages
The balanced output port is American standard wiring
Minimalist design, extremely short signal loop  Cancel all loops that affect the sound quality  Balanced input, sound source switching and other loops
Sub-motherboard design to reduce interference between left and right channels
Fully discrete component design
Ultra-low noise, ultra-low distortion, the transparency of this preamplifier is as clear and profound as the blue sky

Making materials
CNC processed all-aluminum chassis
ALPS27 large potentiometer
Transformer solution 1: Use 1 Panasonic 30w E transformer  The sound of the square transformer is really good  Only AC230V power supply
Transformer solution 2: Use 1 British talema 25w ring transformer Support AC110V or AC230V power supply
Small signal line Taiwan Teflon oxygen-free copper wire
Pure copper high-quality RCA terminal
The whole machine uses recently produced fever capacitors

Specifications
Input sensitivity: 2.52V
Amplifier weight: 3.5kg
Overall size: 320*200*80mm     New max series chassis  See the figure below
AP test parameters     Panasonic E-type, RCA input—XLS output
Output effective value: 18.8Vrms     RCA output 9.4Vrms
Channel gain: 17.5dB     7.56 times       RCA output is 3.8 times
Signal-to-noise ratio: 128.6dB RCA output is 121dB
Dynamic range: 128.6dB
THD distortion: 0.00030%
THD+N distortion: 0.00080%
Channel crosstalk: -102.4dB
Frequency response bandwidth: ±0.037dB
Quality assurance
To ensure quality, each complete machine of Transsion undergoes comprehensive AP testing to ensure that the design indicators are met
Tests include: bandwidth, noise (signal-to-noise ratio), dynamic range, distortion, intermodulation distortion, channel separation, amplification, etc.
The whole machine is tested for 72 hours, the amplifier is tested for 1 hour at full load of 8 ohms, and the audition is more than 1 hour

The picture below is the Panasonic E-cow version. The sound is very good. Only AC220V

The following picture shows the British Porcupine transformer. It supports AC110V and AC220V input.

FM245 preamplifier AP test picture E-niu balanced output

Comparison of the three preamplifier sizes and appearances of Transsion: mini, max, and 430mm standard

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