EX Series B-7

The EX Series is tuned to reproduce sound quality with balance mid and smooth extension in both ends, high and low extension. The EX-B7 is the statement monoblocks power amp. Each monoblock is equipped with a 750VA Toroidal Transformers, 4 pairs of EXICON Laterals MOSFET and a huge power reservoir capacitors farm. It is essential doubled of what the award-winning EX-M1 offered. The good of EX-M1 remains, rich in tonal quality, details, dynamic, and high resolutions. 



What's more? Compare to the award-winning Integrated EX-M1, the EX-B7' power delivery, headroom, dynamic range, are simply incredible. Pairing with its natural mate EX-P7 preamp, you are all set of a premium amplification for your difficult-to-drive loudspeakers.


The EX-B7 uses extremely high cost 0.2µm gold-plated printed circuit board (PCB). From the perspective of PCBs, it is clear that the designer is well aware of the limitations on the fine contact area of the general circuit board, specifically increasing the soldered area at each solder joint and adding as much shielding as possible. 

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C R A F T E D    T O    P E R F E C T I O N


You name it. It was engineered to meet the highest quality standard for you.


P O W E R    S U P P L Y

Power supply circuitry is designed for optimum stability.

The massive power supply with high-efficiency toroidal transformers and large filtering capacitors reservoir ensures a stable current supply at all times.


250Watts RMS into 8Ω

Right, we are being conservative. The monos can technically deliver a lot higher watts than what is stated. We do not want to get into the number games. We trust you as the smart consumer, you are not looking at just the number. The design, choice of components, tuning, is the key of good sounds.


Neutrality and musicality were the goals to achieve. Rich tonal quality, vivid sound imaging, details, high resolution and dynamic. The choice of the components, design, and tuning does just that.


It is the Kinki Studio gears' sound signature.



  • Frequency Response: 0-2.5MHz (±3dB)
  • THDN: <0.05% (-80db)
  • S/N Ratio: >110db(0.01Hz- 1 MHz), >130db (A-Weighted)
  • Output Power: 250 W RMS(8 Ohms) , 380 W RMS(4 Ohms)
  • Max Instantaneous Power: 400w RMS (8 Ohms)
  • Max Output Voltage: 84VAC, 20A
  • Slew Rate: 200 V /us (Rise Time < 300ns)
  • AC Power: 110/240VAC, 50/60Hz (Factory configure).
  • Power Consumption: 30W Idle, 800W Max Output

Input / Output

  • Input Sensitivity: 1.45Vrms
  • Input Impedance: 51kΩ (Acceptable Range 10k-52kΩ)
  • Input Connector: RCA x 1, XLR x 1
  • Output: Speaker Binding Post 4mm L/R Channel

Dimension & Weight

  • Dimension: 330D x 230W x 190H
  • Weight: 17KG ea.

Preamp Matching

Please consider our award winning EX-P7 to match with the monoblocks power amp EX-B7. Our amplifiers are Direct-DC-Coupled without any capacitors in the signal path. This yields less colouration, high resolution, fast, and transparent sound quality. Should you wish to use other preamp make, please be informed that we do not recommend the use of DC-Coupled OTL tube-based preamp. The DC-offset of such preamp may fluctuate as the tube/valve ages and deteriorates. You may experience slight pops/clicks noise to the loudspeakers, it's likely caused by the DC-offset in the preamp. Some preamp/source may have a small DC-offset output, in general, it's recommended to keep it <= 50mVDC. The DC-offset is harmful to the loudspeakers. Our amplifiers are equipped with a Speakers Protection circuit at the output stage. The protection circuit triggers to cut off the amplifier output (to protect the loudspeakers) when it detects a 0.8VDC at the speaker output.


Instruction Manual

Click the above link to download the Instruction Manual.


"This added to its well-deserved award. Had the monos shown up first and I'd never known the EX-M1, the award would have gone to the monos. They hit just as hard on the value meter. Katchinnng. They're built to the same high standards."