GMK Audio — Precision Tools. Unmatched Power.

Car Audio Tools · High Output Alternators · Custom Printing

Your Build.
Engineered Right.

SlotStudio is my free enclosure design tool - built to give the car audio community a better way to design boxes. I’m also an authorized Apex alternator dealer and print custom UV-DTF logos and branding for audio companies. Let’s work.

SlotStudio → Apex Alternators Custom UV-DTF
A white T-shirt with a logo in orange and black. The logo features large orange text reading 'GMK AUDIO,' a black speaker icon above it, a black wave outline crossing the text, and a website URL 'WWW.GMKAUDIO.COM' in orange at the bottom.
Close-up of a disassembled automotive alternator with visible copper windings and internal components.
Open hood of a Volkswagen car showing the engine bay with a green battery and red cables.
Red wooden subwoofer box with a black speaker on top inside the trunk of a vehicle.
Shelf filled with numerous speaker woofers in processing or assembly area, with some stacked in the background. The room has industrial equipment and a window allowing natural light.
A blue wooden speaker cabinet with a curved side and black screws on top, sitting on a wooden workbench in a workshop.
A pink wooden box with a graffiti-style white writing on its side, next to a blue wooden box, inside a workshop.
Close-up of a car alternator with visible vents, pulley, and internal components, placed on a wooden surface.
Close-up view of a robotic arm in a workshop, with a black circular mechanism and a white frame, equipped with a cable, mounted on a sturdy round metal base.
Car trunk with a large, dark blue subwoofer speaker box labeled 'GMK AUDIO' and a few miscellaneous items.
Close-up of a person's fingers holding a small bundle of copper wires wrapped in red insulation.
Top view of a custom audio amplifier chassis showing internal components including copper coils, capacitors, resistors, and circuit boards.
A green battery holder with 6 cylindrical batteries labeled 'positive' in pink and purple text.
Close-up of an automotive alternator with a green pulley, white housing, and black end cap on a black cloth surface.
Hand holding a cylindrical object labeled 'DURAFIELD' with a gold and black design, and close-up of a container with bottles in the background.
A green wooden box with electronic components mounted on top, including two circuit boards with threaded holes and screws, and a metal part with circles and screws.
A wooden box with multiple circular holes on the top and side panels, resting on a stool in a workshop.
A piece of furniture being painted with blue paint, revealing a dark interior.
Black shirt with bright green text that says "Team Shakin Headz" and a dotted semi-circle design below the text.
Multiple large white speaker frames with black speaker cones on a dark floor, with some stacked on pallets in the background.
Four large audio speakers with black tops and white bases placed in a wooden enclosure.
Woodworking workshop with a partially assembled wooden cabinet on a workbench, various power tools and tools scattered around, including a cordless drill, clamps, a tape measure, and a sanding disc, with a box of Milwaukee M18 fuel tools on the cabin
Close-up of shiny red plastic or rubber tubing coiled together.
Back of a black shirt with the word 'RANKS' and green decorative lines.
Close-up of a Apex Alernator with a black and silver design, featuring a large machined pulley cover.
A collection of three large speaker cabinets, one painted gray with a black front, one painted green with open circular holes for speakers, and one with a black wood finish with 4 circular speaker cutouts .
Gray T-shirt with a black logo that says 'SUOER'.
Green box with a logo featuring a red speaker emitting sound waves and black and gray text behind it.
Yellow wooden speaker box with four large black speakers installed, placed in the trunk of a vehicle.
Close-up of wire gauge comparison.
A partially assembled speaker box with a large speaker on top and wiring inside, placed on a green wooden panel labeled 'Team Shakin' Headz' in a room.
The trunk of a car containing a large subwoofer box labeled 'GMK Audio' and some small items in a plastic container.
Close-up of a speaker cone with a black surround, showing the detailed pattern of its surface. The background includes some cardboard boxes and packing materials.
Electrical equipment and cabling inside a vehicle, including a large amplifier, a fuse block, and power batteries.
Close-up of a yellow wooden surfboard with white lettering spelling 'GOLDEN ALOHA', mounted with screws, and a black leash coiled on top.
A wooden speaker cabinet with four large circular cutouts for speaker drivers, with some interior black mesh and visible screws.
Top view of a black, textured speaker cone with the brand name 'GMK AUDIO' written in gold letters.
Rear window of a gray Volkswagen SUV with various stickers, including a website URL 'www.gmkaudio.com' and a sticker for 'Team Shakin' Headz,' on a car parked outdoors with leafless trees and houses in the background on a clear day.
A partially assembled blue and black speaker cabinet with circular cutouts, situated in a workshop or storage space.
Pink wooden subwoofer box with five large speakers inside the trunk of a vehicle.
Close-up of a white fabric item with the words "GMK Audio" printed in camouflage-patterned bold letters.
A painted wooden box with two compartments, one in green at the top and one in red at the bottom, with the words 'GNYK AUDIO' written on the red section.
An acoustic guitar lying on a beige carpeted floor near a large rectangular subwoofer enclosure.
White automotive alternator with black pulley and silver logo on center, placed on a white surface.
Stacks of stickers with the word 'Apex Alternators' in bold, with lightning bolt symbols, in colors including blue, red, gray, green, and white.
Sticker with orange and white text that says "GMK AUDIO" on a black background.
A sticker with the words 'STUPID LOUD' in bold, blue letters outlined in black on a white background, placed on a light wooden surface.
Close-up of a car speaker with a carbon fiber pattern in the center and a black outer rim with white stitching.
Close-up of a 4" subwoofer coil.
Close-up of several stickers with the text 'Stupid' in gold and 'Loud' in blue, overlapping on a dark textured surface.
Close-up of a Zapco Class A/B sound amplifier with a metallic, ribbed design and visible branding.
Blue wooden subwoofer enclosure with a single speaker and a front opening, marked with the text 'GMK AUDIO'.
A black Apex Alterantor high-performance automotive alternator with a polished silver pulley and green internal components, placed on a white foam cushion on a reflective metallic surface, with drill bits visible in the background.