Izzo · Dual boilerAlex Duetto IV Plus
A heavy-duty Italian dual-boiler E61 machine with independent PID control on both boilers, a commercial-grade rotary pump, and a double-walled stainless steel chassis that punches above its price class in the prosumer segment.
The short version
The Duetto IV Plus is a well-built, rebuildable dual-boiler machine from Naples that competes directly with the ECM Synchronika and Profitec Pro 700 while typically undercutting both on street price.
Accept a long warm-up ritual — this machine expects 30 to 60 minutes before the E61 group reaches full thermal stability — and that there is no flow control or pressure profiling capability out of the box.
Why people buy it
- True dual boiler with independent PID on each — brew and steam temperatures are fully isolated, no compromise between them
- Fully rebuildable commercial-grade internals: rotary pump, copper/brass boilers, externally accessible pump adjustment screw, and two-screw heating element access
Why they don’t
- 30–60 minute warm-up to full thermal stability is a genuine daily commitment, not a quibble
The full tally
- True dual boiler with independent PID on each — brew and steam temperatures are fully isolated, no compromise between them
- Fully rebuildable commercial-grade internals: rotary pump, copper/brass boilers, externally accessible pump adjustment screw, and two-screw heating element access
- Reinforced double-walled stainless steel chassis reduces ambient heat output and front-panel flex; 72-lb build discourages counter migration
- Large steam boiler delivers strong, consistent steam pressure for high-quality microfoam on back-to-back milk drinks
- 30–60 minute warm-up to full thermal stability is a genuine daily commitment, not a quibble
- No flow control or pressure profiling — buyers wanting programmable shot profiles must look elsewhere
- At ~72 lbs with a 16.5 × 14.3 × 17.3-inch footprint, it is a large machine that needs a dedicated, measured counter space
What the community knows
Years of owner threads, distilled — well regarded.
Well-engineered dual-boiler with proven decade-plus longevity and serviceability that earns owner loyalty; held back by narrow marketing footprint and long warm-up ritual that deter newer buyers despite genuine mechanical merit.
Reliability
shows up every morning, year after year
Built to last
years before you outgrow or replace it
Parts & serviceability
parts and repairs — you are never stranded
All 9 community measures
price-to-performance the community respects
shows up every morning, year after year
parts and repairs — you are never stranded
mods, guides, and community know-how around it
kind to first-timers
years before you outgrow or replace it
how far the cup can go, per dollar
speed and simplicity, day to day
Worth knowing before you buy — Most owners wish they'd bought it earlier; the machine justifies its price through longevity and zero regret, not through headline shot quality or feature density.
Known weak points — Long heat-up cycle via thermosiphon (reported ~1 hour full transfer to group) is workflow constraint rather than failure, but limits convenience perception; no widespread failure modes documented in available owner record.
“The machine takes about 1-hour to fully transfer its heat from the brew boiler to the E61 group via a thermosiphon circuit of relatively small diameter pipes.”
“The build quality of the Izzo Alex Duetto IV is exceptional. Its massive 72-pound weight immediately indicates how many quality stainless steel components it includes.”
The measurements
Scored 0–5 on the same rubric as everything on file — the words matter more than the numbers.
The measurements
0–5, one rubric- Shot ceiling
- serious4
- Steam power
- confident4
- Built to last
- heirloom5
- Easy daily
- demanding1
Position in the market
Every dot is a rival, measured the same way. The gold one is this.
- Upper half for shot ceiling
- a higher ceiling than 149 of the 237 machines we’ve measured
- Fairly priced for its level
- 50% of machines this capable cost more
- Top quarter for build
- sturdier than 88% of the field, by the community’s own record
Every dot is a machine measured on the same rubric. See the whole market
Living with it
The part spec sheets skip: counter space, upkeep, and what owners learn later.
The honest note — Most owners do not outgrow this machine — it sits near the practical ceiling of home dual-boiler performance short of adding a flow-control paddle or moving to a machine with native pressure profiling (e.g. Lelit Bianca, La Marzocco Linea Micra). Owners who want programmable shot profiles upgrade to those machines; owners who want more out of their current setup typically invest in a better grinder first.
The full spec sheet
- Type
- Dual boiler
- Heat-up time
- ~20 min
- Steam power
- 4/5
- Brew + steam at once
- Yes
- Guest recovery
- 4/5
- Shot quality ceiling
- 4/5
- PID temperature control
- Yes
- Milk system
- Manual steam wand
- Removable brew group
- No
- Hot-water tap
- Yes
- Cup clearance
- 14.6 cm
- Workflow demand
- 4/5
- Maintenance
- 3/5
- Noise
- 2/5
- Build longevity
- 5/5
- Dimensions
- 36 × 44 × 42 cm
Before it arrives
What completes this machine — the faded pieces can wait.
Water filter / softener — Plumbed-in machines need inline filtration to keep scale out of the boiler — it is cheaper than a repair.
- Water filter / softener — Plumbed-in machines need inline filtration to keep scale out of the boiler — it is cheaper than a repair.
- Descaler & backflush kit — Electric boilers scale up and grouts gunk up — a descaler plus backflush routine is what keeps the machine alive for a decade.
- Coffee scale with timer — Espresso is a ratio. A 0.1g scale with a built-in timer is the single biggest consistency upgrade for any manual machine.
- Knock box — Somewhere to bang the spent puck that is not your kitchen bin.
- Calibrated tamper — The bundled tamper is usually an afterthought; a fitted, calibrated one makes prep repeatable.
- WDT distribution tool — Breaks up clumps before tamping — a cheap fix for channeling on any portafilter machine.
- Espresso cups & glassware — Proper demitasse and latte glasses keep the drink hot and look the part.
Feed it right
Week one is dial-in — and stale beans will lose it.
Coffee more than a few weeks past roast won’t extract predictably, and a new machine gets blamed for it. A machine in this class will show you the difference between roast dates — it deserves beans that change week to week.
Pick your coffee — any of these dials in beautifully here:
Sergio - Brazillian Fazenda Joia Rara Aerobic FermentedSCA 88Medium-light · Cerrado Mineiro · Aerobic FermentedHoney · OrangeEnough brightness to show what this gear can separate.CA$29.18 · roasted to order
Honeycrest - Costa Rican Volcán AzulSCA 87Medium-light · West Valley · Red HoneyRaisins · Maple SyrupEnough brightness to show what this gear can separate.CA$19.50 · roasted to order
Wild Ember - Ethiopian Buno Dambi UddoSCA 92Medium roast · Odo Shakiso, Guji Zone, Oromia · NaturalBlueberry · MarmaladeEnough brightness to show what this gear can separate.CA$26.83 · roasted to orderNo proper grinder yet? Sort that first — it decides more of the cup than the machine does. We ship whole bean, roast-dated, timed so it lands fresh the week your burrs do.
Roasted to order, daily, in Ajax, Ontario · ships Canada-wide. We’re the roastery behind this database — measuring the machines is how we make sure the coffee gets a fair shot.
On film
How it runs on camera, from around the community.
Common questions
Does the Izzo Alex Duetto IV Plus require direct plumbing?
No. It ships with a 3-liter internal water reservoir and a toggle switch behind the magnetic drip tray allows easy switching between tank and direct-plumb modes. Plumbing in is optional but recommended for better pre-infusion pressure.
How long does it take to heat up?
The machine reaches boiler temperature relatively quickly, but full thermal saturation of the E61 group head via the thermosiphon circuit takes 30 to 60 minutes. Many owners use a smart plug timer to have the machine ready before they wake up.
Can it run on a standard 15-amp household circuit?
Yes. The machine can be configured for 15-amp or 20-amp operation. In 15-amp mode the coffee boiler runs at 800W (110V). 20-amp mode unlocks full power and faster recovery.
What boiler sizes does it use?
The brew boiler is 0.8 liters. Steam boiler capacity is cited as 1.5L by some retailers and 1.8L by others; buyers should confirm with the dealer prior to purchase.
Does it include a naked (bottomless) portafilter?
Yes. A naked/bottomless portafilter is included along with a standard double-spout portafilter, IMS precision filter baskets, and a metal tamper.
Worth comparing
Profitec
RIDE
The RIDE is a compact dual-boiler E61 machine from Heidelberg, Germany, that heats both stainless steel boilers simultaneously for a claimed 10–12 minute cappuccino-ready time — a meaningful step forward from its predecessor, the Pro 600.
US$2,599–2,899 · CA$3,165–3,700
LUCCA
M58 Sunto Espresso Machine with Flow Control
A compact E61 dual-boiler built exclusively for Clive Coffee by Quick Mill in Milan, with a cartridge-heated group head, OLED PID, pre-installed flow-control paddle, and a rotary pump — all in a footprint smaller than most E61 dual-boilers.
US$3,295–3,440
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