La Marzocco KB90 Commercial Espresso Machine (2 Group)
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The KB90 is the only machine in La Marzocco's line designed around the barista's wrist rather than the coffee. Its Straight-In portafilter pushes in on a straight axis instead of rotating through a bayonet arc — La Marzocco's own figures put the reduction in wrist strain at up to twelve times. Over a 400-drink day that is not a marketing number, it is an injury-prevention one.
What makes the KB90 different
- Straight-In portafilter system: lock in with a single linear push. No twisting, no hunting for the bayonet, and a noticeably faster cycle when you are running back-to-back doubles.
- Auto steam flush: two seconds after you pull the portafilter, the group purges itself with a burst of steam to clear coffee oils and residue — and can be set to follow with hot water. It is one less thing for a busy barista to remember, and it keeps the group genuinely clean between shots rather than nominally clean.
- Independent 1.3 L brew boiler per group: each group runs its own PID-controlled saturated boiler, so you can hold two different brew temperatures at once.
- 7 L steam boiler with Pro Touch wands: dual-wall vacuum insulated wands that stay cool to the touch, standard.
- Four programmable volumetric profiles per group plus a digital display with three programmable buttons.
- Barista lights, hot water economizer and an easy-rebuild steam valve — the service details that keep a high-volume machine in commission.
Choosing your configuration
- AV (Auto-Volumetric): programmable volumetric doses per group with flow-meter control.
- ABR (Auto Brew Ratio): adds precision scales built into the drip tray with La Marzocco's Drip Prediction algorithm, dispensing to a programmed brew ratio by mass rather than volume.
Best suited to
Very high-volume bars, drive-through and grab-and-go formats, transit and stadium concessions, and any operation where barista throughput and repetitive-strain injury are real operational concerns.
Requires a dedicated 30 A circuit. Certified UL-197, NSF-8 and CAN/CSA-C22.2 No. 109. Note: the auto steam flush purges the group, not the puck — baristas still knock out as normal.
| Boiler system | Dual boiler with independent brew boilers |
|---|---|
| Coffee boiler | 2 x 1.3 l (one per group) |
| Steam boiler | 7 l |
| Number of groups | 2 |
| Group head type | Saturated with straight-in portafilter system |
| Portafilter | Straight-in (linear insertion, no bayonet rotation) |
| Auto steam flush | ✓ - purges group 2 seconds after portafilter removal, optional hot water follow |
| Temperature control | Pid per brew boiler plus steam boiler |
| Available configurations | Av (auto-volumetric), abr (auto brew ratio with scales) |
| Programmable doses | 4 volumetric profiles per group |
| Integrated scales | ✓ on abr, with drip prediction algorithm |
| Steam wands | 2 x pro touch, dual-wall vacuum insulated (standard) |
| Barista lights | ✓ |
| Display | Backlit digital, 2 lines x 16 characters, 3-button keypad |
| Hot water economizer | ✓ |
| Steam valve | Easy rebuild |
| Brew pressure | 9 bar |
| Water supply | Direct plumbed (3/8 in male compression) |
| Line pressure required | 45-80 psi (0.2 - 0.6 mpa) |
| Water flow required | 2 gpm / 8 lpm |
| Drain | 3/4 in flexible drainline, min 0.25 in/ft slope |
| Pump | External rotary vane |
| Voltage | 208-240 vac, 1 phase, 60 hz |
| Total power | 5700 w |
| Amperage | 30 a service |
| Width | 81 cm (32 in) |
| Depth | 62 cm (24.5 in) |
| Height | 45 cm (17.5 in) |
| Weight | 71 kg (156 lb) |
| Certifications | Ul-197, nsf-8, can/csa-c22.2 no. 109 |
| Made in | Florence, italy |
| Av (auto-volumetric) | Programmable volumetric doses per group stop the shot automatically at a set yield. |
| Abr (auto brew ratio) | Built-in drip tray scales dispense to a programmed brew ratio by mass, with drip prediction compensation. |
La Marzocco KB90 Commercial Espresso Machine (2 Group)
