THIS BUNDLE CONSISTS OF:
UNIT-4 SPEAKER + DDJ-FLX4 DJ CONTROLLER + HD 25 DJ HEADPHONES
AIAIAI UNIT-4 Wireless+ (Portable Powered Speaker)
The AIAIAI UNIT-4 Wireless+ is a rare thing in the DJ world: a speaker setup that’s portable and clean, but still honest enough to practice properly. Aimed at DJs who need a compact, high-quality monitoring solution for home practice, content creation, small gatherings, or flexible setups, UNIT-4 fits beautifully.
Powered, 2-way speakers designed to give you clear detail in the mids and highs (where your mix decisions live), with a tight low end that helps you judge transitions and EQ without everything turning to mud. The result is a setup that feels more like “real monitoring” than a typical portable speaker — so you’re not training your ears on hype-y sound.
Where UNIT-4 really earns its place in a DJ bundle is the workflow: wireless capability for a tidy setup, quick repositioning, and fast “pack up / reset / move rooms” flexibility — plus wired options when you want the most traditional, bulletproof connection from controller to speaker.
Whether you’re practicing in a bedroom, teaching in a studio room, building a travel-friendly rig, or setting up for a small gathering, UNIT-4 gives DJs something they actually need: great sound with minimal friction.
KEY FEATURES
DJ-FRIENDLY SOUND THAT HELPS YOU MIX (NOT JUST “FUN” SOUND)
UNIT-4 is tuned to keep things clear and controlled — so when you adjust EQ, levels, and transitions, you can actually hear what’s happening. Great for beatmatching, phrasing, and learning how your mixes translate.
PORTABLE, CLEAN SETUP FOR DJ PRACTICE + LESSONS
Perfect for DJs who don’t want a full PA at home, but still want speakers that feel “proper.” Compact footprint, quick to set up, and easy to move between rooms or locations.
WIRELESS FLEXIBILITY FOR A TIDY DJ STATION
Wireless mode is a game-changer for home and teaching setups — fewer cables, faster setup, and easier positioning (especially in tight rooms where your desk layout changes constantly).
WIRED WHEN YOU NEED IT (CONTROLLER → SPEAKER, THE CLASSIC WAY)
When you want maximum simplicity and zero variables, run them wired. This makes them easy to bundle with a controller: plug in, set levels, and you’re off.
GREAT FOR CONTENT + LIVESTREAMING SETUPS
UNIT-4 fits beautifully into a modern DJ workflow where you’re mixing + filming. Clean cabling, easy placement, and controlled sound make it ideal for creating content without overcomplicating your audio routing.
SMALL GATHERINGS + “MICRO SETS” WITHOUT THE BULK OF A PA
For DJs doing casual sessions — rooftop hangs, small house parties, intimate vibe sets — UNIT-4 gives you a confident sound without hauling speakers designed for big rooms. (Think: quality and convenience, not “festival loud.”)
EASY SOUND SHAPING FOR DIFFERENT ROOMS + USE CASES
Because DJs move between “practice mode,” “party mode,” and “content mode,” it helps to have quick sound shaping. UNIT-4 is built for that kind of real-world flexibility.
WHY IT’S GREAT FOR DJs
Aimed at DJs who are starting, upgrading, or building a portable setup, UNIT-4 solves a real pain point:
“I want better sound than laptop/portable speakers or commercial bluetooth speakers, but I don’t want a full PA or expensive Hi-Fi solution.”
It becomes the perfect companion to a controller because it supports:
• Better practice decisions (EQ, gain staging, transitions)
• A clean, modern setup aesthetic
• Quick setup/pack-down for mobile DJs, instructors, and content creators
PRODUCT DETAILS AND SPECIFICATIONS (BUNDLE-FRIENDLY SUMMARY)
• Portable powered speaker system (pair)
• 2-way design for clear mids/highs and controlled low-end
• Wireless + wired connectivity options for flexible DJ setups
• Compact footprint for desks, studios, and small rooms
• Designed for fast setup, repositioning, and tidy cable management
Perfect for: DJ practice • DJ lessons • Home setups • Livestreaming/content • Portable DJ rigs • Small gatherings
Pioneer DJ DDJ-FLX4
The DDJ-FLX4 is the sweet spot for anyone who wants to start DJing properly (or upgrade from a basic controller) without feeling boxed in later. It gives you a pro-style layout, a built-in USB audio interface, and a workflow that feels familiar the moment you step up to bigger club setups — while still being compact enough to throw in a backpack for practice, lessons or house parties. 
What makes the FLX4 stand out is how confidently it supports both learning and performing. You can mix the “normal” way, or lean on the built-in Smart Fader and Smart CFX to help you nail smooth transitions and exciting effects while your hands are still learning the muscle memory. 
It’s also built for modern DJ life: rekordbox + Serato compatibility, multi-device support, and streaming-friendly features (including mic audio routed through USB) so you can go from bedroom practice → livestream → real gigs without swapping your whole setup. 
KEY FEATURES
REKORDBOX + SERATO COMPATIBILITY (START FREE, UPGRADE LATER)
Use rekordbox or Serato DJ Lite for free with a simple connection to your Mac/PC, and upgrade to Serato DJ Pro if/when you want the extra features. 
SMART FADER: CLEAN TRANSITIONS, EVEN IF YOU’RE NEW
Smart Fader helps you move between tracks smoothly by automatically adjusting key mix elements like BPM, volume, and bass balance — so your transitions sound controlled while you build confidence. 
SMART CFX: BIG MOMENTS WITH ONE KNOB
Smart CFX applies a curated combination of effects with a single control, giving you instant “lift” moments without complex effect routing. 
MULTI-DEVICE SUPPORT (INCLUDING BLUETOOTH)
Connect to a computer, or use it with compatible mobile setups via Bluetooth® or USB — great for portable practice and flexible setups. 
STREAMING-READY WITH USB MIC AUDIO
The FLX4 can blend microphone audio + music and send it out via USB, which is ideal for livestreaming or recording without needing an external mixer/soundcard. 
STREAMING SERVICES INSIDE REKORDBOX
rekordbox supports integration with platforms like TIDAL, Beatport Streaming, Beatsource Streaming, and SoundCloud Go+ (subscriptions required), so you can explore and mix huge libraries when you’re building your taste and sets. 
CLASS-COMPLIANT + USB BUS POWERED
Simple setup, minimal fuss: it’s designed to be easy to connect and run, including USB bus power options. 
BONUS: TRaktor Play SUPPORT (NEWER OPTION)
AlphaTheta has also announced DDJ-FLX4 compatibility with Native Instruments’ Traktor Play, giving you another software path if that’s your world. 
PRODUCT DETAILS AND SPECIFICATIONS
• Type: 2-channel DJ controller with built-in USB audio interface 
• Frequency response: 20 Hz – 20 kHz 
• Signal-to-noise ratio: 103 dB 
• Total harmonic distortion: 0.005% 
• Sampling rate: 44.1 kHz / 48 kHz 
• A/D, D/A: 16-bit / 24-bit 
• Inputs: Mic x 1 (1/4-inch TS) 
• Outputs: Master x 1 (RCA), Headphones x 1 (3.5 mm stereo mini) 
• USB: USB Type-C x 2 
• Power: via USB adapter (DC 9V, 3A) or USB bus power (DC 5V, 500 mA) 
• Dimensions (W x D x H): 482 x 272.8 x 59.2 mm 
• Weight: 2.1 kg 
• Included accessories: USB Type-C cable + quick start / safety docs (may vary by region) 
Perfect for: Beginner → intermediate DJs • Lessons • Home practice • Livestreaming • First gigs • Portable setups
Sennheiser HD 25
The Sennheiser HD 25 is a true DJ booth legend — trusted for decades by working DJs, touring crews, and broadcast professionals who need reliable monitoring in loud environments. It’s a closed-back, on-ear headphone built to deliver clear, punchy sound with excellent isolation, so you can lock in your mix even when the room is doing the most.
Designed for long sessions, the HD 25 stays lightweight, secure, and comfortable, with a split headband and grippy fit that doesn’t shift when you move. Add in its rotatable earcup for single-ear listening and a tough, replaceable build, and you’ve got a headphone that’s less “studio ornament” and more “daily weapon.”
KEY FEATURES
BOOTH-PROVEN SOUND YOU CAN TRUST
The HD 25 is tuned for real-world monitoring — tight low-end, clear mids, and the kind of detail that helps you beatmatch, EQ, and phrase with confidence. Whether you’re mixing at home or in a packed venue, it stays focused and musical.
HIGH ISOLATION FOR LOUD ENVIRONMENTS
The closed-back, on-ear design blocks a surprising amount of ambient noise, making it ideal for DJ booths, live stages, events, and any space where speakers are competing for your attention.
ONE-EAR MONITORING, THE WAY DJs ACTUALLY WORK
A rotatable earcup makes single-ear cueing effortless — perfect for checking your next track while staying connected to the room and your main output.
TOUR-READY, MODULAR, REPLACEABLE
The HD 25 is built for the long run. Key components are replaceable (including the cable and ear pads), which means these headphones are designed to be maintained — not thrown away.
LIGHTWEIGHT + SECURE FIT FOR LONG SETS
Comfort matters when you’re practicing for hours or playing extended sets. The HD 25 is famously light with a snug, stable clamp that keeps it locked on during performance without constantly readjusting.
UNIVERSAL COMPATIBILITY
With a wired connection and a practical impedance that plays nicely across DJ gear and everyday devices, the HD 25 is easy to plug in and get straight to work.
PRODUCT DETAILS AND SPECIFICATIONS
- Type: Dynamic, closed-back, on-ear (supra-aural)
- Frequency response: 16 Hz – 22,000 Hz
- Max sound pressure level: 120 dB
- Nominal impedance: 70 Ω
- Total harmonic distortion: < 0.3% (at 1 kHz)
- Load rating: 200 mW
- Cable: Tough, detachable, single-sided (approx. 1.5 m)
- Connector: 3.5 mm (with screw-on 6.3 mm adapter)
- Weight: approx. 140 g (without cable)
- Perfect for: DJs • Live sound • Broadcast • Studio monitoring • Practice rooms • Event work
