I work at Lesound. We’re a China sound system manufacturer – a real factory, not a trading desk. Every week, someone from the US, Europe, or Australia asks me: “Can I get a portable line array that’ loud enough for 200 people outside, without spending thousands?”
Yes. Our S18L224A does that. I’ll show you the specs, answer the 5 most common questions buyers ask, and give you a table so you can compare yourself.
But first – what’s in the box?
- One 18″ powered subwoofer
- Two 4″ line array tops (each has 2x4″ fullrange drivers + 1″ HF driver)
- Speaker pole, line array bracket, speaker cable
- Built‑in 5‑channel mixer, DSP, Bluetooth 5.0 (TWS), MP3 player with LCD
No external amp. No mixer to buy. Plug power, plug your mic or phone, and go.
Real specs – no marketing fluff
| Parameter | Value |
|---|---|
| Frequency response | 50Hz – 20000Hz |
| Max SPL @1m | 121 dB |
| Crossover points | 150Hz, 2.5kHz |
| Sensitivity | 95dB |
| RMS power | 500W (sub) + 200W (tops) = 700W |
| Peak power | 1000W + 400W = 1400W |
| Amp type | Class‑D digital |
| Coverage angle | 60° horizontal x 90° vertical |
| Sub driver | 18″, 3″ voice coil, 80oz ferrite magnet |
| Top drivers | 4″ fullrange x2 + 1″ HF (25mm) |
| Inputs | Combo (XLR/TRS) x2, 6.35mm x2, 3.5mm x1, USB‑A x2 |
| Outputs | Speakon x1, 6.35mm x1 |
| Protections | Thermal, RMS overload |
| DSP functions | EQ (±6dB), Limiter, ECHO, GT Effects, REVERB |
| Bluetooth | TWS, version 5.0 |
| Cabinet materials | MDF (subwoofer), PP (line array), steel grille |
| Power supply | AC 110V‑220V auto |
One customer from Texas tested the 121dB claim with an SPL meter outdoors. He emailed me: “It touched 119dB at 1m before limiting. Close enough – plenty for my wedding gigs.”
Question 1: “Is the 121dB real or just peak?”
Real max SPL at 1 meter. Not “calculated”. We test every batch in our small anechoic‑like room. The system hits limit around 121dB – after that the DSP limiter kicks in to protect drivers. So you get clean output, not distortion.
For a 150‑person outdoor party or a school sports event, it’s enough. If you need louder, you can link two systems via TWS Bluetooth as left/right.
Question 2: “Can it handle both deep bass and clear vocals?”
Yes, because it’s a custom 3 way line array speaker design. The crossover is set at 150Hz and 2.5kHz:
- Below 150Hz → 18″ sub (kick drum, bass guitar, low synth)
- 150Hz – 2.5kHz → the two 4″ drivers (vocals, guitar, snare)
- Above 2.5kHz → 1″ HF driver (cymbals, consonants, air)
So at a wedding: speeches are clear because the vocal range stays in the 4″ drivers. Then for the dance set, the sub kicks in. No need to bring two separate systems.
Question 3: “How reliable is Bluetooth outdoors?”
We use TWS Bluetooth 5.0. Two modes:
- Normal mode – stream music from your phone to the system.
- TWS mode – wirelessly link two S18L224A systems as stereo left/right. No cable between them.
Range is about 20‑25 meters line of sight. Works fine for most backyard parties or small festivals.
But I’m honest: for a paid corporate gig or a live band, use wired connection. That’s why we give you combo jacks, 6.35mm, and 3.5mm. Bluetooth is great for background music or quick setup. Professionals always have a backup cable.
Question 4: “How do I tune the sound for different rooms?”
Use the built‑in DSP and 5‑channel mixer. You get:
- ±6dB EQ per channel (boost or cut bass/mid/treble)
- ECHO (for karaoke or to make vocals thicker)
- GT Effects (reverb‑type effect, good for guitar or general ambience)
- REVERB (room simulation – make a dry hall sound wet)
And there’s an LCD screen showing your settings. No hidden menus.
One UK church buyer told me: “I was going to buy a separate digital mixer for £400. Then I saw your system has everything inside.”
Question 5: “Is it durable? I rent to different venues.”
Here’s a table that shows build quality – not guesses, just facts.
| Feature | What you get | Why it matters |
|---|---|---|
| Sub cabinet | MDF (approx 15mm) | Heavy, low resonance – no rattling |
| Top cabinet | PP (polypropylene) | Light, strong, won’t crack easily |
| Grille | Steel metal | Protects drivers from bumps and drunk guests |
| Inputs | Combo x2, 6.35mm x2, 3.5mm, USB‑A x2 | Connect any source – mics, phones, guitar, USB stick |
| Outputs | Speakon x1, 6.35mm x1 | Link to another speaker or record out |
| Protections | Thermal + RMS overload | Amp shuts down before damage – saves your investment |
| Included extras | Speaker pole, bracket, cable | No extra shopping – unbox and set up |
| Power | 110V‑220V auto | Use in US, Europe, Asia – no voltage mistake |
We also include a line array bracket. So you can angle the tops down if the sub is on the floor and audience is far. Small detail, but rental guys love it.
OEM and custom – put your own brand on it
You don’t want to sell “Lesound”. You want your name. I understand.
We are an OEM dual 4 line array factory. That means:
- You send us your logo (AI or CDR file) – we laser or silk‑screen it on the cabinet.
- You choose a custom color – even RAL code.
- You design the packaging – we print your boxes.
We also do ODM sound system factory work: you give us a rough idea (e.g. “I want a smaller sub, 15″ instead of 18″”) and we engineer a sample.
Minimum order for full OEM: 50‑100 systems, depends on changes.
Lead time: 30‑35 days for first order.
Sample policy: We ship one working unit. You test it. Then you decide.
Amazon sellers – yes, we work with you
We supply several amazon dual 4 line array sellers. We know FBA rules:
- Double‑wall cartons (survives shipping)
- Barcode stickers on each unit
- English manual included
- We can even pre‑print your ASIN on the box
One US Amazon seller switched to us last year. His return rate dropped from 8% to 2%. Reason: our amps don’t fail after three months.
Are you really a China line array speaker maker?
Yes. Our factory is in Ningbo. You can video call us and watch the assembly line. We burn‑in every system for 4 hours before packing – not one hour, four. We hand‑inspect soldering on the DSP board. We reject drivers that don’t meet impedance tolerance.
We are also a custom 3 way line array speaker manufacturer for several European rental companies. They trust us because we don’t swap cheaper parts after sample approval.
Common setups from real customers
- Wedding DJ in Florida – One S18L224A covers 120 guests indoors. Two units linked via TWS cover 250 outdoors.
- Fitness instructor in Australia – Uses Bluetooth from iPad, places tops on tripods (tripods not included, but any standard speaker stand works). Sub on floor. No cables.
- Small church in Texas – Fixed installation. Uses Speakon output to add a passive monitor on stage for the pastor.
- Traveling acoustic duo – PP tops are light (each about 7‑8kg). Sub is heavier (around 32kg). They put wheels on the sub – not included, but you can buy a caster board for $20.
Warranty and support
One year limited warranty. If a driver or amplifier fails within 12 months (not physical damage), we send you a free replacement part. You pay only shipping.
For OEM clients, we keep spare parts for 5 years after your last order. No orphaned gear.
Still have questions? Other buyers asked:
- “Can I use just the two tops without the sub?”
Yes, but you lose bass below 150Hz. For speech only, it’s fine. - “Does it come with a cover or flight case?”
Not standard. But we can make custom nylon covers or plywood flight cases – OEM minimum order applies. - “What’s the exact weight?”
It varies because MDF thickness can change for custom orders. Roughly: sub ~32kg, each top ~7‑8kg. Contact me for exact if you need shipping quotes. - “Can you ship direct to Amazon FBA?”
Yes. We label, pack, and send to any US or EU FBA center. You never touch the boxes.
Why Lesound?
Because you talk to me – a real person on the factory floor. I answer emails within 12 hours. I send you production photos, not stock images. I don’t hide behind “sales department” auto‑replies.
You want a 3 way line array pa supplier that tells you the truth about power, weight, and lead time? That’s us.
Ready to discuss your project?
Stop searching for China sound system manufacturer and getting 20 identical quotes. Contact me directly.
Tell me:
- How many units (trial or container)
- Custom needs: logo, color, DSP changes, packaging
- Where you sell: local shop, Amazon, rental
I’ll reply within 24 hours with:
- Factory price (no middleman markup)
- Simple drawing or sample photo
- Sample cost and lead time
Email: sales@lesound.com.cn
Website: www.le-sound.com
WhatsApp: +86 13957818349
Let’s build a PA system that sounds good, lasts long, and helps your brand grow.
– Miriam, production team @ Lesound
Post time: May-19-2026