Whatsminer 140 mm to 8″ Expansion-Chamber Shroud Silencer

Description

Whatsminer silencer shroud — 140 mm fan to 8-inch duct

A Whatsminer silencer shroud solves a harder version of the problem than an Antminer part does, and this one is drawn for it: a 140 mm fan face on the intake, a reactive expansion chamber through the middle, a full 8-inch collar on the way out. The 8-inch outlet is a design decision. An M-series machine moves a serious column of air, and a narrow throat on the end of a chamber puts the acoustic body and the duct in competition for the same pressure.

Whatsminer noise also travels. It is a hard, carrying sound that gets through a garage wall and across a property line, which is why most M-series owners duct the exhaust somewhere else entirely. This part sits between the fan and that duct and does acoustic work on the way past.

What it fits

Dimensioned to the MicroBT Whatsminer 140 mm fan flange on its 124.5 mm screw pattern, and named machine by machine: the M30S+, the M50, the M50S+ and the M60. The outlet is a standard 8-inch collar, so it mates with 8-inch flex, 8-inch rigid pipe and 8-inch inline fans such as an AC Infinity Cloudline S8.

Choose it with both eyes open. A silencer is a bigger object than a plain shroud — 230 × 230 × 228.2 mm of body behind the machine — and a chamber draws on the same pressure budget the duct run spends. If your M-series already sits at the top of its thermal range, or the duct is a long run with several bends before it reaches outside, the Whatsminer 140 mm Fan to 8" Duct Shroud is the part to buy and routing is the better lever on noise. For metric ducting, the 140 mm to 200 mm metric shroud covers European and Australian sizing today.

How it installs

1. Fit the shroud to the exhaust-side 140 mm fan on the machine’s own fan screws.
2. Clamp 8-inch duct to the collar, supporting the duct’s weight near the machine rather than on the collar.
3. Carry the run to a wall port, an inline booster or the next room.

No wiring, no fan change, no firmware anything. The machine keeps its own fans and its own curve, and the shroud lifts off with a screwdriver.

Why the chamber and the 8-inch collar work together

An expansion chamber is a reactive silencer: it works by geometry rather than by soaking energy up. Sound running down a duct is a wave in a pipe, and a wave in a pipe partially reflects whenever the cross-section changes abruptly. Widen the path, carry that volume for a length, bring it back down to the collar, and part of the sound heading for your duct is turned back toward the fan. Same principle as an engine exhaust, drawn here around a 140 mm fan.

The collar keeps that body honest on a machine of this class: an 8-inch outlet carries roughly 1.8 times the open area of a 6-inch one, and that area is the headroom the chamber spends. There is no absorptive lining in it — nothing to compress, embrittle in hot exhaust or shed downstream into the air crossing your hashboards.

• Fits the 140 mm Whatsminer fan face that most silencers on the market skip entirely
• Reflects sound energy with a reactive expansion chamber instead of foam packing
• Terminates full 8-inch, so the acoustic body is not competing with the duct for pressure
• Mates directly with 8-inch inline fans and 8-inch insulated flex duct
• Arrives as one continuous PETG body — no seams to leak, nothing to assemble
• Stands up to M-series exhaust temperatures that soften PLA parts

Specifications

Open source — print it yourself, or buy it finished

The Whatsminer side of this market is thin on real parts and thick on files of unknown origin. D-Central’s answer is to draw our own and publish them: this silencer is released open source under CC BY-SA 4.0 through the 3D models download center, free to use, modify, remix, print and sell.

D-Central Technologies designed this body, drew the 230 mm chamber onto a 140 mm fan flange, and open-sourced it. Ours, published. The card is at the Whatsminer silencer entry; the file is silencer_140_to_8in.zip, carrying the STL, the CC BY-SA 4.0 licence and the installation and safety guide.

What is on sale here is the finished object, made to order in PETG and shipped from Montreal, Quebec, sized so it seats on the fan flange the first time. Pick it in black or in orange. The files stay free; buying the printed part or backing D-Central’s fund page is what pays for the next design.

Works with

• Whatsminer 140 mm Fan to 8" Duct Shroud
• Whatsminer 140 mm Fan to 6" Duct Shroud
• 140 mm Intake Filter Ring
• 8-Inch Long-Radius 90° Airflow Duct Elbow
• 8" Window Exhaust Port

The whole chain from fan face to window sits in the D-Central shroud and ducting system — one vendor, one tolerance standard, end to end.

Frequently asked questions