KR Audio P135 Pre Amplifier
Best tube pre-amplifier for audiophiles seeking rich, dynamic, and compact sound.
Experience a surprisingly 'big' and sovereign sound with the KR Audio P135 stereo pre-amplifier. Hand-built and featuring two KR45 direct heated triode tubes, this compact unit delivers highly resolved audio with excellent dynamics and impressive bass punch, rivaling much larger systems. It masterfully welds musical elements together, offering the characteristic soft touch of DHT output stages. With multiple RCA line inputs and an XLR input, plus an optional MC Phono stage, the P135 offers remarkable versatility for its size, making it a standout in its class.
$6490.00
Owner Satisfaction
4.6
/ 5
Category Rank
53
/ 111
#53 in Audio Amplifiers
Price vs Category Average
-58%
Below average
Output tubes
245
/ x KR direct heated triodes
Who it's for
- Audiophiles seeking immersive, holographic soundscapes and rich tube warmth
- Collectors valuing artisanal craftsmanship and long-term component reliability
- Listeners who demand absolute clarity during quiet, intimate musical passages
Who should skip it
- Budget-conscious buyers looking for high-value, entry-level audio solutions
- Owners wary of high long-term maintenance and proprietary replacement costs
- Users with limited rack space or poor ventilation in their setup
Performance breakdown
Sonic Resolution
Direct heated triodes deliver exceptional clarity and nuanced musical detail.
Build Integrity
Solid aluminum chassis construction ensures lasting durability and vibration resistance.
Dynamic Range
Surprising punch and authority that defies the unit's compact footprint.
Connectivity Versatility
Balanced XLR and multiple RCA inputs accommodate diverse high-end source components.
Musical Cohesion
Expertly integrates complex musical layers into a unified, fluid performance.
Form Factor
Space-saving design fits easily into refined, minimalist audio setups.
Key Specs
Output tubes
2x KR45 direct heated triodes
Frequency Response
10Hz - 100kHz (-1dB)
Line Inputs
3x RCA pairs, 1x XLR pair
Power Consumption
36VA (115-230V)
Dimensions
36.5 x 8.5 x 26 cm (w x h x d)
Weight
Approximately 6.5 kg
Input Impedance
47 kOhm
Build Quality
High quality, carved from solid aluminum case
Features
- Utilizes two KR45 direct heated triodes
- Delivers high gain and excellent dynamics
- Produces a highly resolved, soft sound signature
- Surprising effective punch in the bass
- Compact dimensions for flexible placement
- Optional MC Phono stage available
- Welds musical elements together convincingly
- Hand-built quality
What customers say
The KR Audio P135 Pre Amplifier earns high praise for its exceptional sonic performance, blending tube warmth with solid state precision. Listeners consistently report a vast, three dimensional soundstage with holographic imaging that brings music to life. The proprietary tubes deliver natural timbre, a liquid midrange, and powerful controlled bass, avoiding common tube coloration. Beyond the sound, the meticulous build quality and component selection reinforce its high end status and promise of long term reliability. While positioned in the luxury segment, owners feel the transformative musicality justifies the investment. It is celebrated as a highly engaging centerpiece for discerning listeners prioritizing dynamic realism.
Know before you buy
The P135 is defined by its use of KR45 direct heated triode tubes, which provide a highly resolved, musical sound with a characteristic 'soft touch.' Despite its compact size, it is known for delivering impressive dynamics and a surprisingly punchy bass response.
The P135 comes standard with line-level inputs, but it does offer an optional MC Phono stage. You will need to ensure your specific unit is configured with this module if you intend to connect a turntable directly.
The unit is quite versatile, featuring three pairs of RCA line inputs and one pair of XLR inputs. This allows you to connect up to four different source components simultaneously.
Not at all. The chassis is carved from solid aluminum, providing a robust and vibration-resistant housing that reflects the hand-built quality of the internal components.
The P135 measures 36.5 cm wide, 8.5 cm high, and 26 cm deep. It weighs approximately 6.5 kg, making it a compact yet substantial piece of equipment for your audio rack.
These tubes are central to the P135's performance, providing high gain and the specific harmonic texture associated with direct heated triode designs. They are responsible for the unit's ability to 'weld' musical elements together into a cohesive, sovereign soundstage.
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$6490