Spherical Speaker Enclosure for Fostex FE83NV2 (Beta)

Designer

euxnas

Designer relation

Ingen

Kategori

Audio

Licens

Creative Commons Attribution NonCommercial Creative Commons - Attribution - Non-Commercial

$ ↺

Attribution påkrævet; kommerciel brug er ikke tilladt.

Designer commercial

None

Først set

2026-07-24 11:54

Sidst set

2026-07-24 20:41

Tags

audio desktop DIY audio FE83NV2 Fostex full range hifi speaker speaker enclosure sphere spherical

Beskrivelse

A fully 3D-printed spherical sealed enclosure for the Fostex FE83NV2 full-range driver. Designed for a clean, natural, vocal-focused sound on a desktop. The seamless sphere hides all fasteners — a threaded equatorial joint and a clamping grille mean no screws are visible from the outside. ⚠️ Beta release. Fully functional, but a few things are still being refined (see Known Issues). Feedback welcome. Features 146 mm sphere — compact and desktop-friendly (stand adds a little height) Spherical shape minimizes edge diffraction and internal standing waves Sealed design, ~0.9 L effective internal volume No visible screws — threaded equatorial joint + clamping grille Multi-part, multi-color friendly (body / grille / stand / feet) Vocal-forward with a strong sense of presence — tight, controlled low end rather than deep bass Files / Parts 01_Front-Enclosure.stl — Front enclosure ×1 (clearance is on the generous side, so it assembles even if the print is slightly off) 02_Rear-Enclosure.stl — Rear enclosure ×1 03a_Grille_Embedded-Nut.stl — Grille, embedded-nut version ×1 (choose one grille) 03b_Grille_Side-Insert.stl — Grille, side-insert version ×1 (choose one grille) 04_Stand-Base.stl — Stand base ×1 05_Feet.stl — Feet: three feet joined by a ring, printed as one part ×1 SphericalSpeakerEnclosureforFostexFE83NV2.3mf — Full project (all print settings included) Two grille options — print only one: 03a Embedded-Nut — the nut is embedded inside during printing. In the .3mf , this plate has a scripted print pause : the printer stops mid-print, you drop in the 4 nuts , then resume to finish. No supports, cleaner finish. (Recommended) 03b Side-Insert — push the nut in from the side after printing. Needs supports, but no pause required. Sourced parts (not printed) — per unit Fostex FE83NV2 driver ×1 Gold-plated brass speaker binding posts, M4 mounting shaft ×2 (one +, one −) — with #205 male faston tabs, so the wiring needs no soldering. The rear has Ø4.2 mm mounting holes for this type; larger posts need the holes enlarged M4 × 12 mm screws ×4 and M4 nuts ×4 (driver mounting) Internal wire: AWG20, 20 cm ×2 (AWG18 also works here — all four terminals are #205, which accepts up to AWG18. I use AWG20 so the same wire fits the #110 terminal on the P650K version too) Faston (spade) terminals, female — 4 per enclosure: #205 ×4 (driver, and both binding posts) Damping: felt (speaker damping sheet) + a little polyester wool Double-sided tape to fix the damping material Print settings Walls: 5 perimeters Infill: 20% (gyroid) Recommended filament: Bambu PLA (Basic / Matte / Silk all verified) Tested on: Bambu Lab P1S with the textured PEI plate STLs are already oriented for printing; the .3mf has everything set up for Bambu Studio Supports — differs per part: 02_Rear-Enclosure — supports on , with the overhang threshold set to 28° 03b_Grille_Side-Insert — supports on (default threshold is fine) All other parts — no supports needed Print pause (03a grille): The .3mf for the 03a grille has a scripted pause . When the printer stops, insert the 4 M4 nuts into the pockets, then resume the print to seal them inside. Assembly (short version) Check the thread fit — stiff on the first turn, but it beds in after a few in/out cycles; a firm final push seats it Mount the terminals to the rear (seal with a gasket or caulk) Place damping — felt on the lower inner wall, a little wool in the center (keep it clear of the cone) Mount the driver — crimp the faston terminals and connect the wiring (pre-twist it opposite to the closing direction), then clamp the driver between the grille and the front part Join the enclosure — screw front and rear together at the equator; press firmly at the end to seat it Assemble the stand — snap the one-piece feet ring into the stand base Set it up — place the sphere on the stand 👉 Full illustrated build guide — written for the P650K version, but the assembly is essentially the same: note.com/euxnas Known Issues (Beta) The inner thread surface prints a little rough (overhang without support). It's not visible and doesn't affect function. The threaded joint is sensitive to filament and print accuracy — even color and lot can matter. If the fit is too tight, run a flow calibration or test-print the thread section first. About the driver / Related The Fostex FE83NV2 is a well-regarded 8 cm full-range driver. This is the 8 cm version of my P650K enclosure: 👉 Spherical Speaker Enclosure for Fostex P650K ☕ If this was useful, you can buy me a coffee — thank you!