T7Pro 250W×2 High-Power Pure Power Amp AP-Assisted Calibration Class AB Stereo Amplifier for Floor Standing & Bookshelf Speakers

Key Upgrades of the T7 Pro

• T7: Launched in 2013

• T7 Pro: Launched in 2026, marking the first major update in 13
  years

• AP-assisted design for improved performance parameters

• Transformer capacity increased: from 800W to 1200W

• Output power increased: from 150W per channel into 8Ω to 250W
  per channel into 8Ω

Circuit Features

• The T7 Pro adopts the flagship amplifier circuit of the
  Burmester 909

• Fully symmetrical X-Amp ultra-fast power amplification circuit

• DC-coupled pure direct current signal path with no capacitors
  in the audio signal chain

• High damping factor for precise control of any loudspeaker

• True dual-mono design: left and right channels are powered
  independently for exceptional channel separation

Build Materials & Components

• Output Transistors: 5 pairs of precision-matched Sanken
  C2922/A1216 transistors per channel, with a high output current capability
  of 105A.

• Internal Wiring: Small-signal and high-current paths use
  Taiwanese-made Teflon-coated oxygen-free copper wire.

• Power Transformer: 1200W high-grade Nippon Steel transformer.

• Filter Capacitors: 12 × 10,000μF audiophile-grade electrolytic
  capacitors.

• Protection Features: Power-on soft-start and comprehensive
  speaker protection circuit.

• Connectors: High-quality RCA jacks and speaker terminals.

Specifications

• Input Sensitivity: 1.27Vrms

• Input Impedance: 33 kΩ

• Damping Factor: 2000

• Output Power: 250W/8Ω, 500W/4Ω (RMS power, stable continuous
  output at full power)

• Idle Power Consumption: 120W

• Power Supply Voltage: AC110V or AC220V

• Chassis Colors: All silver or all black

• Net Weight: 22kg

• Shipping Weight: 25kg

• Unit Dimensions: 450 × 380 × 160mm

• Package Dimensions: 550 × 580 × 230mm

AP-Assisted Design & Parameter Test (8Ω 800W Load Test Data)

• Output RMS Voltage: 41Vrms

• Channel Gain: 28.6 dB (27.0×)

• Residual Noise: 25.77 µVrms

• Signal-to-Noise Ratio (SNR): 122.6
  dB

• Dynamic Range: 122.9 dB

• THD: 0.000389%

• THD+N: 0.001166%

• Intermodulation Distortion (IMD):
  0.005%

• Input Sensitivity: 1.28 Vrms

• Frequency Response Deviation:
  ±0.064 dB

• Input Impedance: 33 kΩ

Quality Assurance & After-Sales Service

To ensure quality, every unit undergoes
comprehensive AP testing to verify it meets design specifications.

• Tests include: bandwidth, noise (SNR), dynamic range,
  distortion, IMD, channel separation, gain, etc.

• Burn-in process: 72-hour continuous power-on, including 1 hour
  of full-load operation into 8Ω, plus over 1 hour of listening tests.

• Warranty: 1-year full warranty, plus lifetime cost-price
  maintenance.

1200W Transformer

Monoblock amplifier circuitry

Independent monoblock amplification, power supply, and protection modules