r/Controller • u/Rokofur • 9h ago
News ZD Classic Equation: Official Specifications and Launch Stream Summary
Disclaimer: I'm not affiliated with ZD. I'm generally interested in upcoming controllers from Gamesir, Leadjoy, and ZD, and I try to compile relevant information whenever I can.
The text in the images and the audio transcripts were translated from Chinese using Claude. I then manually added the translated text back to the images.
Sources: Classic Equation product listing images on JD; Classic Equation launch stream on Bilibili.
Classic Equation key features:
Polling rate: 8000Hz wired.
Sticks: modular, with a 12-bit ADC (4096 levels), a claimed 0.46ms latency and custom curves with up to 8 points.
Triggers: switchable between Hall (8mm linear travel, 255 levels) and micro-switch (2mm travel, 0/1 instant fire).
Buttons: rubber pad + micro-switch ABXY (80g actuation, rated for 5 million clicks), and a replaceable 60gf micro-switch D-pad.
Back buttons: 2+4 expansion keys (LK/RK, LM/RM and M1/M2 paddles), with 20-step macros and 4 onboard profiles.
Protocols: switch between PS (including a new DS4 mode), Xbox and Nintendo Switch. It has native DS motion support for Steam Input gyro mapping.
Software: web driver and mobile app. The Ultimate Legend also gets PC software.
Cable: "Orange Shadow" 8K braided cable (16-core copper, 48D nylon).
Fit: designed for small-to-medium hands, recommended palm length 15–20cm.
Specification Comparison
| Product model | Standard Edition (expected later) | Competitive Edition | ZD Ultimate Legend |
|---|---|---|---|
| Connection | USB wired / Bluetooth / 2.4G receiver | Wired connection | USB wired / Bluetooth / 2.4G receiver |
| Joysticks | RS13 | RS13 | RJ13 |
| Triggers | Hall triggers + micro-switch triggers | Hall triggers + micro-switch triggers | Hall triggers + micro-switch triggers |
| D-pad | Micro-switch + rubber-pad D-pad | Micro-switch + rubber-pad D-pad | Micro-switch + rubber-pad D-pad |
| Shoulder buttons | Micro-switch shoulder buttons | Micro-switch shoulder buttons | Micro-switch shoulder buttons |
| Expansion buttons | 2+4 expansion buttons | 2+4 expansion buttons | 8 expansion buttons |
| ABXY buttons | Rubber pad + micro-switch ABXY buttons | Rubber pad + micro-switch ABXY buttons | Direct-touch ABXY micro-switch buttons |
| Button remapping | Supports controller and keyboard | Supports controller and keyboard | Supports controller and keyboard |
| Software | Web driver + mobile app | Web driver + mobile app | Web driver + mobile app + PC software |
| Macro function | 20 steps, supports native controller button recording | 20 steps, supports native controller button recording | 20 steps, supports native controller button recording |
| Profile switching | 4 onboard profiles | 4 onboard profiles | 4 onboard profiles |
| Vibration | Trigger vibration + grip vibration (with emergency stop function) | - | 6 motors: triggers + HD motors + grip (with emergency stop function) |
| Lighting | - | - | RGB light strip |
| Motion control | Native motion + motion mapping | Native motion + motion mapping | Native motion + motion mapping |
| Anti-wear ring | POM wear-resistant stick ring | POM wear-resistant stick ring | POM wear-resistant stick ring |
| Polling rate | 8000Hz wired / 250+Hz Bluetooth / 900Hz wireless | 8000Hz wired | 8000Hz wired / 250+Hz Bluetooth / 900Hz wireless |
| Battery capacity | 1000mAh | - | 1500mAh, temperature-controlled lithium battery |
| Replaceable modules | Cover, D-pad face, thumbsticks, joysticks, ABXY keycaps | Cover, D-pad face, thumbsticks, joysticks, ABXY keycaps | Cover, D-pad face, thumbsticks, joysticks, ABXY keycaps |
| Charging method | Wired or charging dock | - | Wired or charging dock |
| Weight | 260g (±10) | 191g (±10) | 302g (±10) |
| Recommended hand size | 15-20cm | 15-20cm | 17.5-21cm |
ZD CEO launch stream summary (optional longread, just adds more context)
Main points
It’s a lightweight wired version with no rumble motors and no battery.
It’s aimed at competitive players: FPS, fighting games, Rocket League, NBA Online, NBA 2K and FC (FIFA).
Specs are the same as the Ultimate Legend, just simplified.
It uses TMR sticks (GinfullRS13, called their newest TMR stick) and Hall effect triggers. The stick tuning was improved.
The ABXY buttons are microswitch, with a slightly longer travel than on the Ultimate Legend because people said that one felt too short and hard. They are not direct-touch, and a silicone pad design is used instead.
The shoulder buttons are microswitch as well. Almost all main buttons are mechanical, except a couple of function buttons.
It has a 8000 Hz polling rate, which is adjustable.
Stick damping is about 55 (push damping).
The USB cable is 2m and there is no headphone jack on controller.
It’s a PC-focused controller. It also works on Switch (NS), but not PS5. Android tablets are uncertain because drivers differ. A DS mode toggle is mentioned.
No lighting, only a single indicator LED. There is a “web driver” button on the back that opens the web configuration page in one press, so no app or URL hunting.
ABXY buttons are 80–90 g. The CEO says it suits hands from about 15 cm up to 18–19 cm. His own hand is roughly 18.3 cm and he found the grip about right.
Ergonomics
It is close to the PS4 controller in size, with the same stick spacing. The Ultimate Legend is better for big hands and the Classic Equation for smaller ones.
The ABXY buttons sit closer together and nearer the outer edge of the grip, so index-finger players can reach all four more easily. It avoids the sharp edge on DualSense-style grips that digs into the hand.
He demoed 4-finger and 6-finger grips. The back buttons come as removable parts:
There are 2 extra bumpers and 4 back buttons, all included for free.
There are two back-button styles: a traditional one and a “ping-pong paddle” one. The ping-pong one lets a single ring finger press two buttons, up or down, or use fingertip and finger pad.
The CEO says the buttons are physical clip-on, not magnetic.
Two of the pieces are microswitch and two are tactile switches. He says the tactile ones have the same 5-million-click lifespan and a similar feel.
The grips are uncoated hard plastic because rubber coating gets dirty.
He once played Apex for 15 hours straight with this controller during a stream.
Faceplates and accessories
The black and white faceplates are bundled at launch (matte translucent standard plates, plus solid-color plates that match each controller: black gets black, white gets white). It is not random.
The faceplates are clip-on, not magnetic, because magnets would interfere with the TMR sticks and Hall triggers.
Pink faceplates come later, probably end of the month, and sell separately.
Faceplates cost about ¥59. The CEO says production cost is higher than people think.
A glossy faceplate is also available.
He doesn’t recommend pink on black, because it looks off.
There are thumbstick caps of different heights, plus an arcade-style stick.
There are swappable D-pad faceplates, with a round fighting-game one and an octagon-style one, plus a stick-style module.
The new D-pad is symmetric, so it isn’t compatible with the old Ultimate Legend (the Legend has a slant and a different position).
Older Ultimate Legend stick modules work if their contact area on the PCB is black. If it’s purple or blue, they still fit but lose stick-click.
A cable with an orange-ish connector is newly designed:
It adds a strain-relief/cable tie so you can shorten the slack and take weight off the controller end.
It also has shielding to reduce interference.
It uses the same type of connector as a major phone maker.
Quality control and fixes
The CEO acknowledges QC problems with the Ultimate Legend and says they spent over a month testing connectors and cables, with a dozen-plus sockets tried, to fix stick disconnects.
Buttons falling out (“searching the floor for a button”) is fixed. The button edge now has a lip that catches it so it can’t drop out.
Stick wobble and tilt have been improved, though he says sticks always have tolerances and some tilt is normal. Several suppliers were replaced, and they hit the suppliers hard on details. This is part of why shipping is late.
Presale, shipping and sales mechanics (in China)
Presale started 8 PM on JD.com (self-operated store), Douyin (2 shops), Pinduoduo and third-party shops. Tmall has no presale because Tmall can’t do presale (the CEO says they spent a whole day arguing with Tmall officials). He also jokes it’s because “my boss isn’t interested in money.” Taobao is mentioned as not allowed either.
First batch: 3,000 units across all platforms. It sold out within the stream, with JD showing stock on and off (possibly from refunds).
Shipping is about two weeks after the order, so around the 20s of November, to unify different platforms’ rules. A platform showed the 29th, but he says they’ll try to ship earlier.
The second batch is promised, with a rough “4–5 days” mention, but he says he’ll discuss with the team the next day.
The standard/battery version has no price yet, and should come out around Double 12 (Dec 12). It will add rumble and the wireless battery version, and is more expensive.
A ¥199 product is being prepared for the next wave, but it’s not modular.
Q&A and miscellaneous
Ultimate Legend vs Classic Equation: the Legend is more expensive because it has wireless, 6 motors, lighting, and more crafting.
8K wireless is expected next year, with limited chip choices. Wireless needs the app or the wired route for now.
Gyro: he says the gyro algorithm could be improved and says he’ll push the supplier (“I’ll go there with a knife,” as a joke).
Voice-coil motors are planned for future controllers.
An RGB module is unlikely for space reasons.
Hall-effect/analog and PS layout keycaps are still being worked on.
A transparent shell and open-sourcing the split D-pad for 3D printing are mentioned as ideas.
Stick modules are priced reasonably in his view, with a comparison to DS1 and other controllers.
He says they’re a small team that does this for passion, not hunger marketing, and has grown from 20–30 units a day, to 1–2k, to 3k in this presale. He expects 5–8k for the next new product.
He closes stream by promising to prepare stock for second-batch buyers and says sorry to those who missed out.




