PK Sound · T series · 2025

Ts15
subwoofer

A compact, self-powered 15-inch sub for corporate events, backstage fills and small venues. 136.5 dB from a 31 kg cabinet.

Research (shown)
Sketch (not shown)
Prototype (shown)
Test (shown)
DFM (shown)
Production (shown)

Outcome In production. I led research, prototyping, testing and DFM over about six months, working with an acoustic engineer.

Render of the Ts15 subwoofer — 01Final design: full-face grille, omnidirectional handle, M10 rigging points

02Finished cabinet: amplifier panel and handle pocket

Spec	PK SoundTs15	Meyer750-LFC	d&bT-Sub	L-AcousticsSB15m
Amplifier	Built in	Built in	Passive	Passive
Range	33–100 Hz	35–125 Hz	47–140 Hz	40–100 Hz
Max SPL	136.5 dB	130.5 dB	130 dB	137 dB
Weight	31 kg	48 kg	17 kg	36 kg
Castors	Yes	No	No	No

04Benchmarked against the closest competitors (published specs, range at −10 dB)

Client: In-house
Company: PK Sound
Role: Industrial and mechanical design, accessories, project management, vendor relations and sourcing. Toolpaths, CNC machining and cabinet builds.
Product: Ts15 1 × 15" self-powered subwoofer

01Concept to prototype

Brief and
concepts

PK's point-source series needed a sub for rooms too small for an 18-inch box. The challenge: a small cabinet with a large amplifier, and a port that stays quiet at full output.

Specification

I drafted and refined the product architecture specification, and secured sign-off before detailed design.

Use cases

Corporate events and conferences
VIP and backstage fills
Installs in bars, clubs and theatres
Not for sub walls or flown arrays

Key choices

Handles: off-the-shelf omni handles cut cost and keep a good grip in any orientation
Grille: one grille over the driver and port gives a cleaner look and a lower BoM

Driver selection

Two 15-inch drivers built for mid-bass were compared with the Meyer 750-LFC in listening tests. Neither sounded as good in a sub, which reopened the driver choice.

Prototypes

I wrote the toolpaths, CNC-machined and built the plywood test cabinets myself, to prove the port, bracing and handle pockets.

05Concept Reused T18 handle: port noise, lifts one way

06Concept Handle cut into the cabinet: more woodshop time

07Chosen Off-the-shelf omni handle: lower cost, grips all the way around

12Prototype Plywood test cabinet: baffle and bracing

13Prototype Rear panel, cut for the amplifier

14Prototype Side panel with the handle pocket

02Development

Quieter port, proven rigging

In a cabinet this small, the amplifier crowds the port entry. The port was reshaped, and the rigging was load-tested before release.

15Before Straight port wall, crowded by the amp

Flared port A 48° flare with an R80 edge smooths the airflow at the amp. It reuses the curved-edge process and tooling from the Tx14.
Rigging points, not a flying frame M10 points carry the install bracket now. A flying frame could bolt to the sides later, the same route as the L-Acoustics SB15m.
Two brackets, not a U The heavier cabinet needed more strength than a U-bracket, so the install kit is a pair. Shackle holes allow chain suspension.
Castors as an option Installs don't need castors, so they're a kit. One standard cabinet, and the cost stays off the main BoM.

03Accessories

A kit for each kind of job

Castors, a soft cover and an install bracket are sold separately, so touring and install customers buy only what they need. I oversaw CB Scheme certification for the sub and each accessory.

136.5dB max SPL
33–100Hz range
31kg

Ts15subwoofer

Brief andconcepts