LEAK is a British audio brand with roots stretching back to 1934, when Harold Joseph Leak founded the company in London. LEAK earned its reputation in the mid twentieth century with pioneering amplifiers like the Point One series and the classic TL and Stereo 20 valve designs, products that helped define the golden age of British hi-fi. The modern LEAK revival honors that heritage with retro styling, real wood veneers, and a focus on classic separates. The brand today speaks directly to enthusiasts who want engineering substance wrapped in a design language that nods to the past.
What exactly is the LEAK CDT and what role does it play?
The LEAK CDT is a dedicated CD transport with no built-in DAC, meaning its single job is to read digital data from a disc and pass that bitstream, untouched, to an external converter. This is a deliberate philosophical choice. By omitting the digital to analog conversion stage entirely, LEAK removes the analog output circuitry, the DAC chip, and their associated power supply demands from the chassis. That separation lets you pair the transport with a converter of your choosing and keeps sensitive analog conversion away from the electrically noisy business of spinning a disc and clocking data. In the LEAK lineup, the CDT is designed as a natural partner for the Stereo 130 and Stereo 230 integrated amplifiers, both of which include capable onboard DAC stages, forming a tidy and visually cohesive system.
Core Design and Transport Topology
How does a transport without a DAC actually work?
A transport without a DAC reads the pits and lands on the disc, converts that optical information into a raw digital data stream, and sends it out through a digital output for an external device to decode. Inside a conventional CD player, the signal chain runs from the optical pickup, through error correction and decoding, into a DAC, and finally through analog output stages to your amplifier. The CDT stops that chain at the digital output. The benefit is architectural purity. All of the design budget and internal real estate that a full player would spend on conversion and analog buffering can instead be concentrated on the two things a transport must do well, which are reading the disc reliably and delivering a clean, low jitter digital signal.
What is jitter and how does the CDT fight it?
Jitter is timing error in a digital signal, tiny variations in when each bit arrives relative to when it should, and the CDT combats it with a read-ahead buffer paired with a temperature-compensated crystal oscillator. Understanding why this matters requires a quick detour into how digital audio timing behaves. When data arrives at a DAC with unstable timing, the reconstructed analog waveform can smear, adding a subtle haze or hardness that robs the presentation of focus. The CDT addresses this at the source in two coordinated ways.
First, the read-ahead buffer. Rather than sending disc data straight out in real time, the transport reads ahead and stores incoming data in a memory buffer. This decouples the mechanical act of reading the disc, with all its speed fluctuations and servo corrections, from the act of clocking data out. The output is fed from the buffer at a rate governed by a stable reference rather than by the moment to moment behavior of the spinning disc.
Second, that stable reference is a temperature-compensated crystal oscillator, often abbreviated TCXO. Every crystal oscillator drifts slightly as its temperature changes, and that drift translates into timing instability. A temperature-compensated design actively corrects for thermal variation, holding the clock frequency far steadier than a plain crystal would. The audible payoff is tighter imaging, cleaner leading edges on transients, and a more settled, believable soundstage, provided your downstream DAC is worthy of the clean signal it receives.
Which discs and files can the CDT read?
The CDT plays standard CD, CD-R, and CD-RW discs, and it also handles USB files in WAV, MP3, WMA, and AAC formats. The disc support is the important part for most listeners. CD-R and CD-RW compatibility means home burned compilations and archival discs play back without complaint, which is not guaranteed on every transport because the reflectivity of recordable media differs from that of pressed discs and demands a tolerant pickup and robust error correction. The USB capability broadens the machine's usefulness, letting you play a mix of lossless WAV files alongside compressed MP3, WMA, and AAC content from a connected drive. Because the CDT is a transport, all of that data still exits digitally for your external DAC to convert, so the sound quality of USB playback is bounded by both your file quality and the converter you pair with it.
Power, Materials, and Build
Why does the power supply matter in a transport?
The power supply matters because a transport is full of noise generating activity, from the disc motor and servo systems to the digital clock and logic, and every one of those functions needs clean, stable power to perform at its best. Even though the CDT does no analog conversion, its clock and its buffer are only as good as the voltage feeding them. A stable supply keeps the temperature-compensated oscillator running in its intended operating window and prevents supply borne noise from modulating the timing of the output signal. Isolating the noisy motor and servo demands from the sensitive clock circuitry is a hallmark of a well engineered transport, and it is precisely the kind of internal discipline that separates a purpose built transport from a repurposed disc drive.
What is the CDT built from and why do the finishes matter?
The CDT is offered in a walnut or metal finish, and the choice is about more than looks, though the aesthetics are central to the LEAK identity. The walnut option uses real wood veneer, echoing the warm, mid century furniture aesthetic that defined the classic LEAK era and helping the unit blend into a living space rather than dominate it. The metal finish offers a more contemporary, understated look. Beyond appearance, a rigid, well damped enclosure serves a functional purpose in any disc spinning component. Controlling vibration and resonance around the transport mechanism helps the pickup track the disc accurately, reducing the servo corrections that can inject noise and timing disturbance into the system. A solid chassis is therefore both a styling statement and a performance contributor.
Connectivity and System Integration
What digital outputs does the CDT provide and which should you use?
The CDT provides both coaxial and optical digital outputs, giving you flexibility to match whatever inputs your DAC or amplifier offers. Coaxial, typically an RCA connection carrying an electrical S/PDIF signal, tends to preserve high frequency detail well and generally supports the transfer without the electrical to optical conversion steps that a TOSLINK connection requires. Optical, by contrast, uses light over a fiber and offers complete galvanic isolation, meaning it electrically separates the transport from the DAC and blocks ground loop noise from traveling between components. Neither is universally superior. If your system suffers from ground borne hum, optical can be the cleaner path. If you want the most direct electrical route and your grounding is already quiet, coaxial is often the enthusiast's default. Having both on board means you never have to compromise your connection choice to suit the transport.
Do you need a separate DAC to use the CDT?
Yes, the CDT requires an external DAC or a DAC-equipped amplifier because it contains no digital to analog conversion of its own. This is not a limitation but the entire point of the design. You can feed the digital output into a standalone DAC or into an integrated amplifier that includes digital inputs. LEAK explicitly positions the Stereo 130 and Stereo 230 as ideal partners, since both integrated amplifiers carry onboard DAC stages and matching styling. Pairing the CDT with one of these creates a coherent source and amplification chain where the transport handles reading and clocking, the amplifier handles conversion and amplification, and the whole system shares a consistent visual and engineering language.
How does the CDT fit into a larger, evolving system?
The CDT fits into an evolving system gracefully because separating the transport from the converter future proofs your disc playback. DAC technology moves quickly, and converter chips, filter implementations, and interface receivers improve over time. When your source is a pure transport, you can upgrade your DAC independently and immediately benefit from the newer conversion without replacing your disc mechanism. Conversely, a strong transport delivering a clean, low jitter signal continues to pay dividends as your downstream electronics improve. This modular approach is a long standing tenet of separates based hi-fi, and the CDT embodies it fully.
Interpreting the Design Choices
What do the CDT's specifications tell us about its priorities?
The specifications tell us this is a focused, single purpose machine that prioritizes signal integrity over feature sprawl. The absence of a built in DAC, the inclusion of both coaxial and optical outputs, and the combination of a read-ahead buffer with a temperature-compensated crystal oscillator all point in the same direction, which is delivering the cleanest possible digital bitstream to an external converter. There is a clarity of intent here. LEAK did not try to make the CDT do everything. Instead, it concentrated on the fundamentals of disc reading and clock stability, then handed off conversion to a partnering component chosen for its own strengths. For the experienced enthusiast, that division of labor is exactly what makes a transport worth owning.
Who is the CDT really for?
The CDT is really for the listener who still values physical media and wants to build or extend a genuine separates system with LEAK components at its heart. If you own a collection of CDs, including home burned CD-R and CD-RW discs, and you already have or plan to acquire a quality DAC or a DAC-equipped amplifier like the Stereo 130 or 230, the CDT slots in as the disc reading foundation. It rewards careful system matching, respects the engineering value of clean timing, and carries the LEAK aesthetic in either warm walnut or contemporary metal. It is a component built on the conviction that doing one job exceptionally well beats doing many jobs adequately.
