Single Group

Introduction

The Slayer Single Group, often referred to as “The Dream Machine,” occupies a unique position in the high-end espresso machine market. This espresso machine bridges the gap between commercial capability and home usability. It's not just an appliance, but a statement of dedication to the craft of espresso, appealing to those who are willing to invest significantly in their coffee setup.

Brief history of Slayer

Slayer Espresso was founded in 2007 with a singular mission: to create the best possible espresso machine, regardless of cost. The Seattle-based company spent its first two years in intensive research and development, focused on perfecting a new approach to espresso extraction. The company's machines became recognizable for their distinctive aesthetic, combining industrial elements with artisanal craftsmanship, and their uncompromising build quality. 

In 2017, Italian coffee equipment giant Gruppo Cimbali acquired Slayer Espresso. This strategic partnership allowed Slayer to accelerate its international presence by leveraging Cimbali's extensive global distribution network, manufacturing expertise, and resources. While now part of a larger corporation, Slayer has maintained its distinctive design philosophy and commitment to pushing the boundaries of espresso extraction.

Today, Slayer continues to influence the speciality coffee industry, representing the intersection of cutting-edge technology, meticulous craftsmanship, and an unwavering commitment to exceptional coffee experiences.

Overview of the Slayer Single Group

The Slayer Single Group is designed to cater to three primary markets:

• Discerning home baristas who demand café-quality espresso
• Small, speciality coffee shops focusing on exceptional quality
• Catering businesses and mobile coffee operations

What sets the Slayer Single Group apart is its ability to pack commercial-grade components and innovative features into a compact footprint suitable for home kitchens and small cafés alike. It competes with other high-end machines like the La Marzocco GS3 and the Victoria Arduino E1 Prima, but distinguishes itself through its patented needle valve technology and unparalleled customization options.

The Slayer Single Group is positioned as the ultimate tool for those who view coffee-making as both an art and a science.

Specifications and Technical Details

The Slayer Single Group is a powerhouse of engineering, packed with high-end components designed to deliver exceptional espresso.

Dimensions and weight

The Slayer Single Group is designed to fit comfortably in both home and light commercial settings:

• Width: 47 cm
• Depth: 58 cm
• Height: 33 cm
• Weight: 50 kg

Despite its compact footprint, this machine is substantially built, reflecting its commercial-grade construction.

Boiler specifications

The Slayer Single Group features a dual boiler system:

• Brew boiler: 1.1 litres, 600 Watts
• Steam boiler: 3.3 litres 
• Pre-heat coil: 60 millilitres

This configuration allows for simultaneous brewing and steaming without compromising temperature stability or pressure.

Pump type

The machine utilises a commercial-style rotary vane pump, which provides consistent pressure and can draw water from either an external reservoir or a direct plumb connection.

Electrical requirements

• 220 volts / 10 amps: 220-240V; 50/60Hz; 10A; 2.1-2.4kW

The PID temperature control allows for precise temperature adjustments in 0.1°C increments.

Design and Build Quality

The Slayer Single Group is renowned not just for its performance, but also for its striking aesthetics and robust construction.

Materials used

The Slayer Single Group is built with commercial-grade components, reflecting its heritage as a professional-level machine:

• Body: Powder-coated steel panels
• Frame: Stainless steel
• Boilers: Stainless steel
• Group head: Commercial Version 3, rated for 1 million cycles
• Portafilters: Chrome-plated brass
• Steam wand: Stainless steel with a 4-hole tip

These high-quality materials contribute to the machine’s durability and longevity, ensuring it can withstand the rigours of daily use in both home and light commercial settings.

Aesthetic considerations

The Slayer Single Group is often described as a work of art, with its design being as much about form as it is about function:

• Distinctive X-shaped legs in silver powder-coat (standard)
• Black powder-coated side and rear body panels (standard)
• European Ash wood accents on steam handles, brew actuators, and portafilters (standard)
• Glass touchscreen display
• Shot mirror for easy viewing of extraction

One of the most appealing aspects of the Slayer Single Group is its customizability. Buyers can choose from a variety of colours, metals, and wood options to create a truly unique machine that fits their aesthetic preferences.

Footprint and space requirements

Despite its commercial-grade capabilities, the Slayer Single Group is designed to fit comfortably in a home kitchen or small café:

• Countertop footprint
• Minimum load capacity
• Clearance needed: Additional space required for portafilter overhang

When considering placement, it’s important to note that this machine requires a direct plumb connection in its standard configuration, though recent updates suggest an option for an external reservoir may be available.

The Slayer Single Group’s design and build quality reflect its position as a premium espresso machine.

Core Functionality

The Slayer Single Group’s core functionality is where it truly shines, offering commercial-grade performance in a compact package.

Espresso extraction process

The Slayer Single Group’s extraction process is centred around its patented needle valve technology:

• Pre-brew phase: Uses a restricted flow rate for gentle saturation of the coffee puck
• Full-brew phase: Switches to full pressure for complete extraction
• Manual paddle control: Allows baristas to switch between pre-brew and full-brew phases

This unique system allows for extremely fine grinds and extended pre-infusion times, resulting in higher extraction yields without over-extraction or bitterness.

Temperature stability data

Temperature stability is crucial for consistent espresso, and the Slayer Single Group excels in this area:

• PID-controlled brew boiler: Adjustable in 0.1°C increments
• Pre-heat coil: Passively heats incoming water using the steam boiler
• Saturated group head: Ensures consistent temperature throughout the brewing process

These features work together to maintain precise temperature control, essential for extracting the best flavours from your coffee.

Pressure profiling capabilities

The Slayer Single Group offers unparalleled control over pressure during extraction:

• Needle valve: Allows for precise adjustment of flow rate during pre-brew
• Manual paddle: Enables on-the-fly switching between pre-brew and full-brew pressures
• Programmable pre-brew timer: Automates the pre-brew phase for consistency

This level of control allows baristas to “flavour profile” their espresso, emphasizing different taste characteristics by manipulating pressure throughout the shot.

Steam wand performance metrics

The steam system on the Slayer Single Group is designed to rival commercial machines:

• 3.3-litre steam boiler: Provides ample steam capacity
• Fully articulating steam wand: Offers flexibility in pitcher positioning
• 4-hole steam tip: Balanced for the large boiler capacity
• Lever-style controls: Provide precise and instantaneous control

While not equipped with Slayer’s patented dry steam technology (found in their commercial models), the steam performance is still exceptional, capable of producing microfoam for latte art with ease.

User Experience

The Slayer Single Group is designed to offer a professional-grade experience, but how does this translate to daily use?

Learning curve

The Slayer Single Group offers unprecedented control, but with that comes a degree of complexity:

• Initial setup: Requires careful calibration of the needle valve and grind size
• Shot pulling: Users need to learn to manipulate the paddle for optimal pre-infusion and extraction
• Experimentation: Understanding how to use flow control to affect flavour profiles takes time and practice

While experienced baristas may adapt quickly, home users should expect a learning period to fully harness the machine’s capabilities.

Daily operation workflow

Once familiar with the machine, the daily workflow is straightforward:

• Turn on the machine (or use the programmable auto-on feature)
• Allow about 15-20 minutes for full heat-up
• Purge the group head
• Dial in the grind and dose (typically 18-20 grams)
• Use the paddle to control pre-infusion and extraction
• Steam milk if needed (can be done simultaneously with extraction)
• Regular backflushing and cleaning as needed

The touchscreen interface simplifies many operations, including temperature adjustments and shot timing.

Ease of adjustments and customisation

The Slayer Single Group offers extensive customisation options:

• Brew temperature: Adjustable in 0.1°C increments via the touchscreen
• Steam pressure: Can be personalised through the PID controls
• Pre-brew flow rate: Adjustable via the needle valve (accessed under the cup warming tray)
• Shot parameters: Pre-brew time can be programmed for consistency

Aesthetic customisation is also a key feature, with options to change the colour of body panels, legs, and wood accents to suit personal taste or match a café’s decor.

The user experience of the Slayer Single Group reflects its position as a high-end, prosumer machine. It offers professional-level control and customisation, which can be both exciting and challenging for users.

Maintenance and Longevity

The Slayer Single Group is built to last, but like any high-end espresso machine, it requires proper care and maintenance.

Regular cleaning requirements

Daily and weekly cleaning routines are essential for optimal performance:

• Daily: Backflush with water after each session
• Weekly: Backflush with espresso machine cleaner
• After each use: Wipe down the steam wand and purge
• Regularly: Clean the drip tray and group head

The machine features an automatic backflushing cycle, simplifying the cleaning process. Users just need to add cleaner and initiate the cycle via the touchscreen interface.

Long-term maintenance needs

For long-term reliability, several maintenance tasks are recommended:

• Descaling: Frequency depends on water hardness, but typically every 3-6 months
• Group head gasket replacement: Every 6-12 months, depending on use
• Shower screen replacement: As needed, typically annually
• Portafilter gasket replacement: Every 6-12 months

The machine’s design allows for relatively easy access to internal components, which is beneficial for more extensive maintenance or repairs.

Availability of parts and service

Slayer provides solid support for their machines:

• Warranty: 15-month warranty on all equipment and parts from the date of shipment
• Parts availability: Most parts are readily available through Slayer or authorized dealers
• Service network: While not as extensive as some larger brands, Slayer has a network of trained technicians

It’s worth noting that the electronic group head is unique to Slayer, which may limit the number of technicians familiar with servicing it compared to more common group head designs like the E61.

The Slayer Single Group is built with longevity in mind, using commercial-grade components rated for high-volume use. For instance, the group head is rated for 1 million cycles before requiring maintenance. This robust construction, combined with proper care and maintenance, means the machine should provide many years of reliable service.

Potential buyers should be aware that the machine’s advanced features and unique design may require more specialized knowledge for repairs compared to simpler machines. This is an important consideration for those not located near a Slayer-authorized service centre.

Performance in Various Scenarios

The Slayer Single Group is designed to excel in a variety of brewing scenarios.

Single shots vs. double shots

The Slayer Single Group comes equipped with a commercial portafilter and 58mm baskets, suitable for both single and double shots:

• Single shots: While possible, the machine is optimized for doubles. Single shots may require more careful adjustment of the pre-infusion and flow rate.
• Double shots: This is where the Slayer truly shines. The standard 18-20g dose in the provided basket allows for optimal extraction and flavour profiling.

The machine’s flow control capabilities are particularly beneficial for double shots, allowing for extended pre-infusion times that can enhance extraction and flavour complexity.

Light vs. dark roasts

The Slayer Single Group’s adjustable parameters make it versatile for different roast profiles:

• Light roasts: Benefit from the machine’s ability to extend pre-infusion times. This allows for finer grinds and higher extraction yields without introducing bitterness, bringing out the delicate, nuanced flavours typical of light roasts.
• Dark roasts: The flow control can be adjusted to shorter pre-infusion times and potentially lower brew temperatures, helping to manage the higher solubility of dark roasts and prevent over-extraction.

The needle valve can be adjusted between 40-60 grams of water delivered in 30 seconds during pre-brew, with lighter roasts benefiting from settings closer to 40 grams and darker roasts towards 60 grams.

Performance with milk-based drinks

The Slayer Single Group is well-equipped for milk-based drinks:

• Steam power: The 3.3-liter steam boiler provides ample steam for texturing milk, rivaling commercial machines.
• Simultaneous operation: Users can steam milk while pulling a shot, thanks to the independent boilers.
• Steam wand design: The 4-hole tip and full articulation allow for precise milk texturing.

While not equipped with Slayer’s commercial dry steam technology, the steam performance is still exceptional, capable of producing microfoam suitable for latte art with ease.

The Slayer Single Group’s performance across these scenarios demonstrates its versatility. Its ability to fine-tune parameters allows users to optimize extraction for a wide range of coffee types and brewing styles. This flexibility, combined with its powerful steaming capabilities, makes it suitable for both straight espresso enthusiasts and those who prefer milk-based drinks.

Comparative Analysis

To truly understand the Slayer Single Group’s position in the market, it’s important to compare it with similar machines in its class.

Objective comparison with similar machines in its class

The Slayer Single Group’s main competitors include:

• La Marzocco GS3
  
  • Similarities: Dual boiler, PID temperature control, professional-grade components
  • Differences: GS3 lacks Slayer’s patented needle valve technology for flow control
• Victoria Arduino E1 Prima
  
  • Similarities: Compact design, suitable for home and light commercial use
  • Differences: E1 Prima is a volumetric machine, while Slayer offers manual control
• Decent DE1PRO
  
  • Similarities: Both offer extensive control over extraction parameters
  • Differences: Decent uses digital technology and a tablet interface, while Slayer relies more on mechanical controls

Key advantages of the Slayer Single Group:

• Unparalleled flow control through patented needle valve technology
• Commercial-grade build quality in a compact form
• Extensive customization options for aesthetics

Potential drawbacks:

• Steeper learning curve compared to some competitors
• Higher price point
• May require more specialized maintenance

Price-to-feature ratio

The Slayer Single Group is positioned at the higher end of the price spectrum. When considering its price-to-feature ratio:

Justifications for the price:

• Patented needle valve technology offering unique flow control
• Commercial-grade components rated for high-volume use (e.g., group head rated for 1 million cycles)
• Extensive customization options for both performance and aesthetics
• Handcrafted in Seattle, USA, with high-quality materials

Considerations:

• Some competitors offer similar core functionalities (dual boilers, PID control) at lower price points
• The value of the flow control feature depends on the user’s interest in experimenting with extraction profiles

The Slayer Single Group stands out in its class for its unparalleled control over the extraction process and its build quality. While it comes at a premium price, for the right user, its unique capabilities and craftsmanship can offer excellent value.

For coffee enthusiasts and professionals who value the ability to fine-tune every aspect of their espresso, the Slayer Single Group’s unique features may justify its premium price. For users who prioritize ease of use or don’t require such extensive control, there may be more cost-effective options available.

Long-term Ownership Considerations

When investing in a high-end espresso machine like the Slayer Single Group, it’s important to consider the long-term aspects of ownership.

Resale value

The Slayer Single Group tends to hold its value well for several reasons:

• Brand reputation: Slayer is known for quality and innovation in the espresso world
• Limited production: As a boutique manufacturer, Slayer produces fewer machines than mass-market brands
• Durability: The commercial-grade components contribute to a long lifespan

However, potential buyers should note that the machine’s specialized nature might limit the resale market to serious enthusiasts and professionals.

Warranty information

Slayer offers a comprehensive warranty for the Single Group:

• Duration: 15 months from the date of shipment
• Coverage: All equipment and parts are warranted to be free from defect in material or workmanship
• Limitations:
  
  • Warranty covers materials only, excluding labor, shipping, and other costs
  • Does not cover damage from improper use or inadequate water treatment
  • Excludes parts subject to normal wear and tear (e.g., gaskets, shower screens)

It’s important to note that the warranty may be voided by improper maintenance or unauthorized modifications.

User community and support resources

Owning a Slayer Single Group provides access to a passionate community of users and resources:

• Online forums: Dedicated threads on coffee enthusiast forums like Home-Barista.com
• Social media: Active communities on platforms like Instagram, where users share tips and experiences
• Official resources: Slayer provides detailed user manuals and instructional videos
• Dealer network: Authorized dealers often offer support and advice

The machine’s unique features, particularly the flow control system, have inspired a culture of experimentation among users. This community can be a valuable resource for new owners learning to maximize their machine’s potential.

Long-term ownership of a Slayer Single Group requires commitment, both in terms of ongoing maintenance and in developing the skills to fully utilize its capabilities. However, for those who embrace this commitment, the machine offers the potential for years of high-quality espresso production and a connection to a community of like-minded enthusiasts.

The combination of durable construction, comprehensive warranty, and engaged user community makes the Slayer Single Group a machine that can provide value and satisfaction well beyond the initial purchase.

Potential Limitations

While the Slayer Single Group is a highly capable machine, it’s important to consider scenarios where it might not be the ideal choice. Understanding these potential limitations can help prospective buyers make an informed decision.

Scenarios where the machine might not be ideal

• Limited space:
  
  • The Slayer Single Group requires significant counter space
  • May not be suitable for small kitchens or tight cafe setups
• High-volume commercial environments:
  
  • While commercial-grade, it’s designed for light commercial use
  • May struggle to keep up in busy cafe settings requiring rapid, high-volume output
• Novice users:
  
  • The learning curve can be steep for those new to espresso making
  • May be overwhelming for users seeking a simple, push-button experience
• Budget constraints:
  
  • It’s a significant investment
  • May be cost-prohibitive for casual home users or small businesses with limited budgets
• Lack of volumetric dosing:
  
  • Unlike some competitors, the Slayer Single Group doesn’t offer automatic volumetric dosing
  • This could be a drawback for those prioritizing consistency and ease of use in a commercial setting
• Plumbing requirements:
  
  • Standard configuration requires direct plumbing
  • May be challenging for users without easy access to water lines or drain systems
• Maintenance considerations:
  
  • Requires regular maintenance and potential specialized servicing
  • May be problematic for users not located near authorized service centers
• Preference for lighter machines:
  
  • It’s significantly heavier than many home machines
  • Could be an issue for those who need to move their machine frequently
• Users seeking super-automatic features:
  
  • Lacks built-in grinder or one-touch milk frothing found in some high-end super-automatic machines
  • May not suit those prioritizing convenience over control
• Inconsistent power supply:
  
  • Requires stable power for optimal performance
  • May not be suitable for locations with unreliable electricity

While these limitations don’t diminish the Slayer Single Group’s capabilities, they highlight scenarios where alternative machines might be more appropriate. Potential buyers should carefully consider their specific needs, environment, and skill level when evaluating if this machine is the right fit for them.

Consumer Feedback Summary

To provide a well-rounded view of the Slayer Single Group, it’s crucial to consider the experiences of actual users. 

Overview of user reviews 

The Slayer Single Group receives overwhelmingly positive reviews from users. Most rate it highly, often giving it 4.5 to 5 stars out of 5. Users frequently describe it as their “dream machine” or the “ultimate home espresso setup.”

Key points from user reviews:

• Espresso quality: Consistently praised for producing exceptional espresso
• Build quality: Frequently described as robust and well-engineered
• Aesthetics: Many users appreciate its striking design and customization options
• Learning curve: Often mentioned as challenging but rewarding
• Customer service: Generally positive experiences with Slayer’s support team

Common praise and criticisms

Praise:

• Extraction control: Users love the ability to fine-tune extractions with the needle valve technology
• Temperature stability: Consistently highlighted for its precise and stable brewing temperatures
• Steam power: Many users compare the steaming capabilities favorably to commercial machines
• Durability: Frequently mentioned as a machine built to last
• Craftsmanship: Users often comment on the high-quality materials and attention to detail

Criticisms:

• Price: Some users find it difficult to justify the high cost, especially compared to other prosumer machines
• Complexity: A few users report feeling overwhelmed by the learning curve and numerous adjustable parameters
• Size and weight: Occasionally mentioned as challenging for smaller spaces or those who need to move the machine
• Maintenance: Some users note the importance of regular maintenance and potential difficulty in finding qualified technicians
• Plumbing requirement: A few users express frustration with the need for direct plumbing in the standard configuration

Conclusion

Recap of key points

The Slayer Single Group espresso machine stands as a pinnacle of home and light commercial espresso brewing technology.

• Innovative design with patented needle valve technology for unparalleled flow control
• Commercial-grade build quality in a compact form suitable for home or small café use
• Dual boiler system with PID temperature control for excellent temperature stability
• Powerful steam capabilities rivaling larger commercial machines
• Extensive customization options, both in terms of aesthetics and brewing parameters
• High-quality components, including a group head rated for 1 million cycles

Suggestions for further research

For those considering the Slayer Single Group, we recommend the following steps for further research:

• Hands-on experience: If possible, try the machine at a local dealer or specialty coffee shop
• User forums: Engage with current owners on platforms like Home-Barista.com or coffee-specific subreddits
• Video tutorials: Watch detailed operation and maintenance videos on Slayer’s official channels
• Competitor comparison: Consider how the Slayer Single Group compares to other machines in its class, such as the La Marzocco GS3 or Decent DE1PRO
• Space and plumbing: Carefully measure your available space and consult with a plumber if direct water line connection is required
• Long-term costs: Research the costs of regular maintenance, potential repairs, and any necessary accessories

The Slayer Single Group unique capabilities allow for a level of experimentation and control that’s rare in home or light commercial settings. It requires a significant investment, both financially and in terms of the time needed to master its operation.

For the right user, the Slayer Single Group can be an exceptional tool for exploring the nuances of espresso extraction. Its ability to bring out the best in different coffee beans and roasts, combined with its robust build quality, positions it as a machine that can provide years of satisfaction for those willing to invest in their coffee journey.

The decision to purchase a Slayer Single Group should be based on a careful consideration of one’s coffee goals, budget, and willingness to engage with a complex but rewarding brewing process. For those who do take the plunge, the Slayer Single Group offers the potential to elevate their espresso game to new heights.