The LEAK Stereo 130 revives one of the most respected names in British audio history, wrapping modern digital capability inside a chassis that deliberately references the brand's mid-century heritage. This is an integrated amplifier with a built-in DAC, aimed at the listener who wants a genuine one-box solution without giving up the flexibility to build a proper system around it. Below, we take a component-level look at what makes the Stereo 130 tick, from its amplifier topology to the precise connectivity it offers.
What kind of amplifier is the LEAK Stereo 130?
The Stereo 130 is an integrated amplifier with a built-in DAC, meaning it combines preamplification, power amplification, and digital-to-analog conversion in a single chassis. In practical terms, this consolidates what would otherwise be three separate boxes into one unit, reducing interconnect cabling and simplifying grounding. For an experienced listener, the appeal is that the digital front end and the analog gain stages are engineered to work together, with the DAC feeding the preamp section directly rather than through an external interconnect that adds its own coloration and noise floor considerations.
How much power does it deliver and what does that mean in practice?
The Stereo 130 is rated at 2 x 45W into 8 ohms, a figure that places it squarely in the moderate-power category suited to efficient bookshelf and floorstanding speakers in small to medium rooms. Forty-five watts per channel is more than adequate headroom for most domestic listening, particularly with speakers rated at 87dB sensitivity or higher, where a handful of watts covers ordinary listening levels and the balance provides dynamic reserve. The rating into 8 ohms is the honest reference point here, and pairing the amplifier with speakers that present a benign, relatively flat impedance curve will let it operate well within its comfort zone rather than being asked to double down into difficult loads.
What amplifier class does the Stereo 130 use?
The Stereo 130 runs a Class AB output stage, the topology that has anchored high-fidelity amplification for decades because it balances efficiency against linearity. In a Class AB design, the output devices are biased so that they conduct across a small overlapping region near the zero-crossing point, which suppresses the crossover distortion that plagues pure Class B while avoiding the substantial heat and inefficiency of pure Class A. The result is an amplifier that stays reasonably cool and power-efficient at idle and low volumes, then transitions cleanly as the signal swings, delivering the bulk of its output with good linearity and controlled distortion.
The Digital Front End
Which DAC chip does the Stereo 130 use and why does it matter?
The Stereo 130 is built around the ESS Sabre ES9018K2M, a 32-bit DAC that is well regarded for its low noise floor and strong distortion performance. This is a two-channel member of the ESS Sabre family, using the company's Hyperstream modulator and jitter-rejection architecture to convert incoming digital data into an analog signal with high dynamic range. The 32-bit designation refers to the internal processing resolution, which provides ample headroom for digital volume handling and dithering long before the signal reaches the analog stages. For the enthusiast, the practical upshot is a converter capable of resolving very fine low-level detail while keeping quantization artifacts and correlated noise well below audibility.
What digital formats can it decode?
The Stereo 130 handles PCM up to 384kHz and DSD up to DSD256, covering essentially the full range of high-resolution content most listeners will encounter. PCM to 384kHz means it accepts everything from standard 44.1kHz CD-quality material through the various studio and hi-res sample rates without needing external upsampling. DSD256 support, which is the one-bit format at sixteen times the rate of standard SACD DSD64, means native playback of high-rate DSD files is possible. In use, this format breadth matters most through the USB input, where a computer or streamer can send whatever your library contains and let the ES9018K2M do the conversion natively rather than forcing a downconversion upstream.
What is the asynchronous USB-B input and why is asynchronous operation important?
The asynchronous USB-B input is the connection you use to feed the Stereo 130 from a computer or compatible streamer, and the asynchronous designation means the amplifier's own clock governs the timing of the data transfer. In an asynchronous USB implementation, the DAC controls the flow of data from the source rather than slaving itself to the source's clock, which allows a stable local oscillator to master the conversion timing. This is the mechanism that minimizes jitter, the timing uncertainty that smears digital audio, because the clean clock sits right next to the converter instead of arriving over a noisy cable. This is the input that unlocks the full PCM 384kHz and DSD256 capability.
What other digital inputs are provided?
Alongside USB-B, the Stereo 130 offers two optical inputs and one coaxial input, giving you three additional S/PDIF connections for source components. The two optical (TOSLINK) inputs are ideal for televisions, set-top boxes, and disc players, and because they are optical they provide inherent galvanic isolation, breaking ground loops between components. The single coaxial input accepts an electrical S/PDIF signal over a 75-ohm RCA connection, which many listeners prefer for CD transports because it is less bandwidth-limited than optical for high sample rates. Having two optical and one coaxial means you can keep several digital sources permanently connected and switch between them from the front panel.
How does the Bluetooth input work?
The Stereo 130 includes Bluetooth with aptX, allowing wireless streaming from phones, tablets, and computers with reduced compression artifacts compared to baseline Bluetooth. The aptX codec uses a more efficient encoding scheme than the standard SBC codec, preserving more of the signal for a cleaner, more detailed wireless stream when both ends of the link support it. This is intended as a convenience input for casual listening and guest playback rather than a replacement for the wired digital inputs, but the inclusion of aptX means it performs noticeably better than a basic Bluetooth implementation.
Analog Inputs and the Phono Stage
Can I connect a turntable directly?
Yes, the Stereo 130 includes a built-in MM phono stage, so a turntable fitted with a moving magnet cartridge can be connected without any external phono preamplifier. The phono stage applies the RIAA equalization curve that reverses the frequency shaping applied during record cutting, and it provides the substantial gain needed to bring a low-output cartridge signal up to line level. Because it is specified for moving magnet cartridges, it is optimized for the higher output and standard 47k-ohm loading that MM designs expect. If you run a moving coil cartridge, you would need an appropriate external step-up device ahead of this input.
What line inputs are available?
The Stereo 130 provides line inputs for connecting analog source components that already output at line level. These accept the analog outputs of devices such as external DACs, tuners, or auxiliary sources over standard RCA connections. Feeding a line-level source here routes it into the preamp section without passing through the internal DAC, keeping the signal path entirely analog from input to output.
Outputs and System Integration
How do I add a subwoofer?
The Stereo 130 has a dedicated subwoofer output, letting you integrate a powered subwoofer into the system for extended low-frequency reach. This output provides a line-level signal that you route to the subwoofer's own amplifier and crossover, allowing you to supplement the main speakers' bass without taxing the amplifier's 45W output stage in the deepest octaves. This is particularly useful when pairing the Stereo 130 with compact standmount speakers that roll off early in the bass.
What is the RCA pre-out for?
The RCA pre-out delivers a variable line-level signal from the preamp section, which you can use to drive an external power amplifier or an active subwoofer with volume tracking. This output is the key to system expansion, allowing the Stereo 130 to serve as a preamplifier and DAC feeding a more powerful outboard amplifier should your speakers demand more than 45W. It also opens the door to biamping arrangements or feeding a second zone.
Is there a headphone output?
Yes, the Stereo 130 includes a built-in headphone amplifier for private listening. This dedicated stage drives headphones directly from the front panel, and engaging it typically routes the signal path to the headphone jack for personal listening sessions. Because the amplifier already contains the high-quality ES9018K2M DAC, the headphone output benefits from the same clean digital front end that feeds the speaker outputs.
Controls, Power Supply, and Build
What does DIRECT mode do?
DIRECT mode bypasses the tone control circuitry, sending the signal through the shortest possible path for maximum transparency. When engaged, the bass and treble controls are taken out of the circuit so the signal is not subject to the additional stages that implement tone shaping. Purists will leave DIRECT engaged for critical listening, since fewer components in the path generally means lower noise and less phase disturbance, while the tone controls remain available whenever a recording or room calls for correction.
How do the tone controls work?
The Stereo 130 provides bass and treble tone controls that let you shape the low and high frequency balance of the sound. These adjust the relative level of the frequency extremes, allowing you to compensate for bright or dull recordings, difficult room acoustics, or speaker placement compromises. They are active only when DIRECT mode is disengaged, so you can choose between a purist signal path and adjustable tonal balance depending on the material.
What finishes are available and how is it built?
The Stereo 130 is offered in Walnut, Grey, and Black, with the Walnut option evoking the wood-cased look of classic LEAK equipment. The finishes cover the wraparound cabinet, giving the amplifier a compact, retro-modern presence that suits both traditional and contemporary rooms. The build combines a substantial front panel with the wood or painted sleeve, reflecting the brand's intent to marry vintage aesthetics with current internal engineering.
Interpreting the Measurements
What do the specifications tell us about real-world performance?
The combination of a 45W-per-channel Class AB output and the ES9018K2M DAC points to an amplifier engineered for clean, low-distortion performance within a sensible power envelope. The Class AB topology suppresses crossover distortion while the ESS converter contributes a very low noise floor and strong intrinsic distortion figures, so the limiting factor in system performance is far more likely to be speaker matching than the electronics themselves. The PCM 384kHz and DSD256 support confirms the digital section is provisioned well beyond common source material, meaning it will pass hi-res content without downsampling. Taken together, the sensible way to read these numbers is that the Stereo 130 is designed to sound clean and neutral with efficient speakers, offering a serious digital front end and genuine system flexibility through its pre-out, subwoofer output, and comprehensive input array.
