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Kinki Studio EX-B7
The EX Series has been optimized to deliver well-balanced sound quality with a smooth extension in both high and low ends, achieved through meticulous tuning of the midrange.
The EX-B7, which represents the pinnacle of this series, is a statement monoblock power amp that boasts a massive power reservoir capacitor farm, four pairs of EXICON Laterals MOSFET, and 750VA Toroidal Transformers in each monoblock.
Compared to the award-winning EX-M1, the EX-B7 offers double the power output while retaining the EX-M1's excellent tonal quality, detail, dynamics, and high resolution.
DESIGNED for CRITICAL AUDIOPHILE
In addition, the EX-B7 outperforms the award-winning Integrated EX-M1 in terms of power delivery, headroom, and dynamic range, making it an exceptional choice for even the most demanding loudspeakers.
When paired with its natural mate, the EX-P7 preamp, you can enjoy a premium amplification system that is specifically designed to drive difficult-to-drive speakers with ease.
The EX-B7 is built with a 0.2µm gold-plated printed circuit board (PCB), which is known for its high cost. The designer of the EX-B7 clearly recognizes the limitations of standard circuit boards with regard to contact area, and has taken steps to address this issue. By increasing the soldered area at each joint and adding additional shielding, the designer has optimized the performance of the PCB to ensure the best possible sound quality.
OPTIMIZED POWER SUPPLY
The power supply circuitry of the EX-B7 has been meticulously designed to ensure optimal stability. This is achieved through the use of high-efficiency toroidal transformers and large filtering capacitor reservoirs, which work together to provide a constant and stable current supply.
The substantial size of these components ensures that the power supply can deliver the necessary energy to the amplifier with minimal distortion, even during demanding dynamic peaks. As a result, the EX-B7 delivers clean and accurate sound reproduction at all times.
HIGH DAMPING MODULAR POWER STAGE
The power amplification circuitry of the device is directly mounted on a custom-made, gold anodized heat sink, providing efficient heat dissipation. The power stage features two pairs of power EXICON MOSFETs, which are driven in Class AB to ensure optimal performance.
The device features two identical power stage modules that are arranged on the left and right sides of the chassis. These modules deliver exceptional power to the two channels, providing 250 watts into 4-8 ohms, ensuring reliable and high-quality audio performance.
CRAFTED TO PERFECTION
Indeed, while the EX-B7 monoblocks are technically capable of delivering significantly higher wattage than their stated specifications, we prefer to take a conservative approach and not engage in a game of numbers.
As an informed consumer, we trust that you understand that there is more to good sound quality than just the wattage rating. The careful design, selection of components, and tuning of the amplifier all play critical roles in achieving excellent sound reproduction, and we are confident that the EX-B7 delivers outstanding performance in all of these areas.
The sound signature of the EX-B7 is characterized by a focus on neutrality and musicality, with the goal of achieving rich tonal quality, vivid sound imaging, exceptional detail, high resolution, and dynamic range. These sonic characteristics are the result of careful component selection, thoughtful design, and meticulous tuning, resulting in the distinctive sound signature that is a hallmark of KINKI STUDIO
We highly recommend pairing the EX-B7 power amp with our award-winning EX-P7 preamp for optimal performance. Our amplifiers are Direct-DC-Coupled, which means that there are no capacitors in the signal path. This yields less coloration, higher resolution, and a more transparent and fast sound quality.
We do not recommend using a DC-Coupled OTL tube-based preamp with our amplifiers, as the DC-offset of such preamps may fluctuate as the tube ages and deteriorates. This can result in slight pops or clicks being heard through the speakers.
In general, we recommend keeping the DC-offset of your preamp/source at or below 50mVDC to minimize the risk of damage to your speakers.
It's worth noting that the DC-offset can be harmful to your speakers. However, our amplifiers are equipped with a Speaker Protection circuit at the output stage, which triggers to cut off the amplifier output (to protect the speakers) when it detects a 0.8VDC at the speaker output.
The Universal Integrated Amp?
Today's Kinki should uncramp your finger and pull that trigger. The EX for 'extreme' in the name isn't idle puffery. It's well deserved. If enough people catch on, this amp will become a classic. For now, it could already be your classic. Classy all around!
Dealers selling Kinki Studio near you
Kinki Studio EX-B7 — potent, ultra-fast monoblocks
The Kinki Studio EX-B7 monos marry muscular headroom with razor-sharp timing to deliver a compelling, immediate musical experience. With a ultra-bandwidth DC-coupled topology and quoted 0–2.5MHz response, the EX-B7s accentuate speed and clarity while adding substantial, well-damped low-end. Listeners hear solid tone and quick transient attack, a forward midrange and an extended, highly resolved treble that pushes recordings front-and-center. Performance highlights include 250W RMS into 8Ω (380W/4Ω), a 750VA supply and Exicon lateral MOSFET output devices—engineering that reviewers at Srajan Ebaen and 6 Moons credit for exceptional dynamics and tight control. Compact, well-built (33x23x19cm, 17kg) and protected, the EX-B7 suits listeners with power-hungry speakers who want a vivid, near-stage presentation. For the price, it’s a high-value, high-performance choice that competes with far costlier rivals.
Pros
- Outstanding dynamics and headroom — drives demanding speakers with authority and instant burst power.
- Fast, transparent sound with tight, well-damped bass and incisive transient speed.
- Robust engineering and compact footprint — beefy transformer, Exicon MOSFETs and DC-coupled design underpin reliable performance.
- Exceptional price-to-performance — reviewers note sonic parity with much more expensive reference amplifiers.
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Cons
- Can expose upstream component issues: some tube preamps or specific XLR feeds produced HF grit/noise that required system matching or RCA use.
- Very revealing, close-to-stage presentation may feel fatiguing for listeners who prefer a warmer, more relaxed tonal balance.
Sound Quality
93/100
Dynamics
94/100
Reviewers repeatedly praise the EX-B7 monos for effortless authority and headroom (250W/8Ω, 380W/4Ω) with statements like "doing nearly 500 watts into 4Ω hold downstairs court" and "drive all comers without fail." High quoted damping factor (2,500) and wide bandwidth/DC-coupled topology are cited as delivering tight grip, excellent transient speed and control. The monoblock implementation and reviewers' notes about handling difficult loads and huge instantaneous current delivery justify a top-tier dynamics score.
Soundstage Imaging
90/100
Reviewers describe a palpable, physical presentation ('they're here' vs the 'I'm there' perspective) with closer, stage-front immediacy and improved perceived energy and presence. Imaging stability under load and an expanded sense of front-row proximity are specifically mentioned, indicating very strong spatial performance.
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Build Quality
92/100
Robust engineering is cited: large 750VA transformer, DC-coupled ultra-bandwidth design, substantial copper mounting wedge for transistors and compact, well-managed thermal layout (33x23x19cm, 17kg each). Reviews refer to monoblock configuration and improved protection/segregated control circuitry, supporting a high build-quality score.
Value for Money
93/100
Reviewers explicitly praise value relative to peers at ~€4k / ~$3.5k, noting that the EX-B7 competes sonically with much costlier reference amps and that two Kinki pre/power sets cost less than competing high-end pairs. Given the power (250W/8Ω, 380W/4Ω), features (DC-coupled, huge bandwidth, high damping) and consistently positive comparative language about price-performance, the amp merits an explicit high value rating.
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