Description
The StealthMiner is the quietest custom Bitcoin miner ever assembled by D-Central Technologies — and it is not even close. Built from the ground up for stealth operation in bedrooms, offices, and apartments, this machine takes industrial Antminer hashboards and wraps them in a purpose-built enclosure with premium sound dampening, perpendicular Noctua cooling, and residential 120V power compatibility. The result: a fully plug-and-play SHA-256 miner that delivers 26-38 TH/s at under 60 dB while simultaneously heating your space.
This is what Bitcoin Mining Hackers do. We take hardware designed for warehouse-scale operations and hack it into something you can run next to your bed without losing a minute of sleep. Every StealthMiner is hand-assembled, tuned, and stress-tested for 24 hours in our Laval, Quebec workshop before it ships.
D-Central handles component sourcing, assembly, tuning, quality control, and support for every StealthMiner.
Technical Specifications
| Specification | Details |
|---|---|
| Algorithm | SHA-256 (Bitcoin) |
| Hashrate Range | 26 — 38 TH/s (variant dependent) |
| Power Consumption | 650 — 930W (variant dependent) |
| Efficiency | 24.5 — 33.1 J/TH (variant dependent) |
| Noise Level | <60 dB (conversational volume) |
| Cooling | 4x Noctua NF-F12 iPPC 3000 RPM (perpendicular airflow) |
| Dimensions | 300 x 300 x 146 mm (11.81 x 11.81 x 5.75 in) |
| Weight | 7.26 kg (16 lbs) |
| Input Voltage | 115 — 240V AC (runs on standard 120V outlets) |
| Input Current | 12A |
| Frequency | 47 — 63 Hz |
| Network | RJ45 Ethernet 10/100M + WiFi adapter included |
| DC Output | 5.5 x 2.1 mm barrel jack, DC 12V |
| Operating Temp | 0 — 45 C |
| Storage Temp | -40 — 85 C |
| Humidity | 10 — 90% RH (non-condensing) |
| Altitude | Up to 2,000 m |
| Power Supply | Loki Rig Build (APW3++ PSU, 120V residential) |
| Firmware | VNish (pre-configured) |
| Warranty | 90 days |
| SKU | DC-MINER-STEALTH |
StealthMiner Variants
Three hashboard options are available, each offering a different balance of hashrate, power draw, and efficiency. All three share the same purpose-built enclosure and Noctua cooling system — the difference is the Antminer generation inside.
| Variant | Hashrate | Power | Efficiency | Noise | Best For |
|---|---|---|---|---|---|
| S19 Edition | 26 TH/s | 860W | 33.1 J/TH | <60 dB | Budget entry, cool environments (<25 C intake) |
| S19j Pro Edition | 32 TH/s | 900W | 28.1 J/TH | <60 dB | Best balance of hashrate and efficiency |
| S19k Pro Edition | 38 TH/s | 930W | 24.5 J/TH | <60 dB | Maximum hashrate, best efficiency (J/TH) |
All variants use Noctua NF-F12 iPPC 3000 fans. The S19 Edition can also be configured with Arctic P12 Max fans for slightly lower noise in cool environments — ask our team at checkout.
Why It Is Called “Stealth”
Standard Antminers produce 75-80 dB — the volume of a vacuum cleaner running non-stop. That is fine for a garage or a basement, but it is completely unacceptable in a bedroom, home office, or apartment.
The StealthMiner solves this with three engineering decisions:
1. Perpendicular Noctua Cooling
Instead of the stock barrel fans that push air straight through (and generate most of the noise), the StealthMiner uses 4x Noctua NF-F12 iPPC 3000 fans in a perpendicular orientation. Noctua fans are the gold standard in the PC enthusiast world for a reason: they move serious air at a fraction of the noise. The perpendicular layout creates a more efficient temperature gradient across the hashboard, meaning the fans do not need to spin at maximum RPM.
2. Purpose-Built Enclosure
The enclosure is not a modified off-the-shelf case. It was designed specifically for this application — every dimension, vent placement, and baffle angle is optimized for sound dampening without restricting airflow. The compact 300 x 300 x 146 mm footprint means it fits on a shelf, desk, or nightstand.
3. Loki 120V Power System
The Loki Rig Build by Pivotal Pleb replaces the stock control board, enabling single-hashboard operation on a standard 120V residential outlet. No 240V circuits, no electrician visits, no PDUs. Plug it in like a toaster. This also means lower total wattage (650-930W), which keeps the heat and fan speed manageable.
The result: sub-60 dB operation. That is quieter than a normal conversation. You can run this in a bedroom while someone sleeps in the same room.
Dual-Purpose: Mine Bitcoin, Heat Your Home
Every watt the StealthMiner consumes is converted into two outputs: SHA-256 hashes and heat. At 100% electrical-to-thermal efficiency (because physics), the StealthMiner produces 2,218 to 3,171 BTU/hr depending on variant and power setting.
| Variant | Power Draw | BTU/hr Output | Heats Approx. |
|---|---|---|---|
| S19 Edition | 860W | ~2,934 BTU/hr | 150-200 sq ft |
| S19j Pro Edition | 900W | ~3,069 BTU/hr | 150-225 sq ft |
| S19k Pro Edition | 930W | ~3,171 BTU/hr | 175-250 sq ft |
Actual room coverage depends on insulation quality, ceiling height, outside temperature, and airflow. Use our Space Heater BTU Calculator for a personalized estimate.
During Canadian winters, this heat is not waste — it is a direct offset against your furnace or baseboard heaters. You pay for electricity either way. With the StealthMiner, that electricity also earns you Bitcoin. Read the full breakdown: Bitcoin Space Heater vs. Electric Heater — The Complete 5-Year Cost Comparison.
Plug-and-Play Setup
Every StealthMiner ships fully assembled, tuned, and tested. Setup is three steps:
- Plug in power — standard 120V outlet, dedicated 15A circuit recommended
- Connect network — Ethernet cable (included) or WiFi adapter (included)
- Point to your pool — access the web interface from any browser on your network and enter your pool URL + worker name
That is it. No firmware flashing, no frequency tuning, no voltage tweaking. Each unit is pre-configured with VNish firmware at three tested operational settings, optimized in our lab for the specific hashboard inside your machine. You can fine-tune later if you want, but it mines out of the box.
Network options: The StealthMiner includes both a wired Ethernet port (RJ45 10/100M) and a WiFi adapter (Pixlink or Vonets), so you have full flexibility regardless of where your router sits.
What Is Inside the Box
| Item | Details |
|---|---|
| StealthMiner enclosure | Custom sound-dampened chassis, fully assembled |
| Antminer hashboard (1x) | Recycled S19 / S19j Pro / S19k Pro (variant selected at purchase) |
| Noctua NF-F12 iPPC 3000 fans (4x) | Perpendicular cooling configuration |
| Loki control board | By Pivotal Pleb — enables 120V single-hashboard operation |
| APW3++ PSU (silenced) | Recycled, tested, 120V-compatible |
| Power cord | North American standard |
| Ethernet cable | For wired connection |
| WiFi adapter | Pixlink or Vonets (for wireless operation) |
How the StealthMiner Compares
Not sure which D-Central custom build is right for you? Here is how the StealthMiner stacks up against our other residential mining solutions.
| Feature | StealthMiner | Slim Edition | S19 Space Heater | Loki Edition |
|---|---|---|---|---|
| Priority | Minimum noise | Compact size | Maximum heat output | Budget / DIY |
| Hashrate | 26-38 TH/s | 26-44 TH/s | 40-56 TH/s | 26-38 TH/s |
| Power | 860-930W | 860-930W | 1100-1200W | 860-930W |
| Noise | <60 dB | ~55-60 dB | ~50-55 dB | ~55-60 dB |
| Voltage | 120V / 240V | 120V / 240V | 120V / 240V | 120V / 240V |
| Form Factor | Compact cube (300mm) | Slim profile | Full-size heater | Bare-bones |
| Best Placement | Bedrooms, offices | Shelves, desks | Living rooms, hallways | Basements, workshops |
| Sound Dampening | Premium | Good (3D-printed chassis) | Good (custom case) | Basic |
The short version: If noise is your number-one concern — if you are putting a miner in a bedroom, a home office during Zoom calls, or a small apartment — the StealthMiner is the right choice. If you need more hashrate and can tolerate slightly more noise, look at the Antminer Slim Edition or the S19 Space Heater Edition.
Frequently Asked Questions
How loud is the StealthMiner, really?
Under 60 dB at all power settings. For context, a normal conversation is 60 dB, a refrigerator hum is 40 dB, and a stock Antminer S19 is 75-80 dB. The StealthMiner sits right at the boundary where most people can sleep through it. In a separate room with a closed door, it is effectively inaudible. Read our full guide: ASIC Noise Reduction Guide.
Can I run it on a standard 120V household outlet?
Yes. The Loki Rig Build enables full operation on a standard North American 120V / 15A circuit. No electrician needed, no 240V wiring, no special outlets. Just plug it in. We recommend a dedicated circuit (nothing else on the same breaker) since the StealthMiner draws 7-8A continuously. It also works on 240V if you have it available.
Which variant should I choose?
The S19k Pro Edition (38 TH/s, 24.5 J/TH) is the best overall value — highest hashrate, best efficiency, same noise level. Choose the S19j Pro Edition (32 TH/s) for a middle ground, or the S19 Edition (26 TH/s) if you want the lowest power draw and electricity cost. All three are under 60 dB.
What does “recycled components” mean?
The hashboards and APW3++ PSUs inside each StealthMiner are recovered from decommissioned commercial mining operations. They are fully functional components that institutional miners replace when they upgrade to newer generations — not because they are broken. Every component is tested, cleaned, and tuned before assembly. This approach reduces e-waste and keeps the price accessible for home miners. It is the Mining Hacker way: give perfectly good hardware a second life in someone’s home.
How much Bitcoin will I mine?
Mining revenue depends on Bitcoin’s price, network difficulty, your pool fees, and your electricity cost. At current difficulty levels, a 38 TH/s StealthMiner (S19k Pro Edition) will earn a small amount of sats daily. The key insight: when you use the StealthMiner as a heater, your effective electricity cost drops to near zero because you were going to spend that money on heating anyway. Use our Mining Profitability Calculator to model your specific scenario.
Can I use it as my only heat source?
For a small room (150-250 sq ft), yes — the StealthMiner produces 2,934-3,171 BTU/hr depending on variant, which is comparable to a standard portable space heater. For larger spaces, pair it with your existing heating system. The StealthMiner offsets a significant portion of your heating bill while stacking sats. See our BTU Calculator to estimate coverage for your room.
What if it needs repair?
Every StealthMiner comes with a 90-day warranty. If anything goes wrong, you are covered with prioritized repairs at our ASIC Repair facility in Laval, Quebec. D-Central has repaired thousands of ASIC miners since 2016 — we know these machines inside and out. Keep the security seals intact to maintain warranty coverage.
Is the StealthMiner good for apartment mining?
The StealthMiner was specifically designed for apartments. Sub-60 dB operation means your neighbours will not hear it. Standard 120V power means no electrical modifications. The compact 300mm cube fits on a shelf or desk. And the heat output replaces your electric heater, so your landlord sees the same power bill. Read more: Bitcoin Mining in Apartments.
What firmware does it run?
VNish firmware, pre-configured with three tested operational profiles optimized for your specific hashboard. VNish provides fine-grained frequency and voltage control, which is how we achieve the target hashrates at reduced power consumption. You can adjust settings through the web interface, but we recommend keeping the factory profiles unless you are experienced with ASIC tuning.
How does it compare to a Bitaxe for quiet home mining?
Different tools for different jobs. A Bitaxe is a solo lottery miner doing ~500 GH/s — it is ultra-quiet, ultra-low-power, and you are hoping to hit a full block reward (~3.125 BTC). The StealthMiner does 26,000-38,000 GH/s on a pool, earning consistent daily sats. If you want steady income and serious heat output, choose the StealthMiner. If you want the thrill of solo block hunting with minimal power draw, grab a Bitaxe. Many of our customers run both. See the full comparison of quiet home miners.
Why D-Central
D-Central Technologies has been building, repairing, and hacking Bitcoin mining hardware since 2016. We are not a dropshipper. We are not a reseller with a warehouse full of machines we have never opened. We are Bitcoin Mining Hackers — a team of technicians and engineers in Laval, Quebec who take industrial-grade mining equipment and re-engineer it for the home miner.
The StealthMiner represents everything we believe in: decentralization at the individual level. Every unit that ships moves hashrate out of corporate data centres and into someone’s bedroom, office, or apartment. It heats their home. It stacks their sats. It strengthens the Bitcoin network.
Every unit is hand-assembled, tuned on three nominal settings, and stress-tested for 24 hours before it earns the D-Central seal. If it does not perform to spec, it does not ship.
Every hash counts.
Reconditioned Excellence — Our machines are not just refurbished; they are revitalized. Each unit passes a rigorous reconditioning process before the 24-hour stress test. When you buy from D-Central, you are securing top-quality equipment on a first-come-first-served basis.
90-Day Warranty — Should any issues arise, we offer prioritized repairs at our Laval repair facility. Keep the security seals intact to maintain coverage.
Shipping and Customs — Prices do not include shipping, customs fees, or taxes. International buyers should review local import regulations before ordering. Standard processing time is under 48 hours; allow up to 5 business days for testing, packing, and shipping.
Final Sale — Due to the dynamic nature of cryptocurrency markets, all sales are final. We cannot honour refund requests due to price adjustments. By purchasing, you agree to our return and refund policy.
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