JBL NANO K4
Delivery & payment
- Pickup at the school
- Free · 9:00–21:00
- Ho Chi Minh City
- Fee confirmed with your order
- Across Vietnam
- Courier · fee confirmed by phone
- Payment
- VietQR · cash on delivery · pay at the school
Warranty Genuine product, official warranty, 7-day exchange for factory faults.
- Type
- 4″ powered reference monitor pair (master + extension), Bluetooth
- Woofer
- 4″ (101.6 mm)
- Tweeter
- 20 mm (0.79″)
- Amplifier
- 50 W (LF) + 50 W (HF), Class AB
- Frequency range
- 55 Hz – 20 kHz
- Crossover
- 3.5 kHz
- Max SPL
- 99 dB @ 1 m
- Sensitivity
- 92 dB @ 1 m (−10 dBV input)
- Inputs
- Bluetooth, RCA, AUX (unbalanced); TRS (balanced)
- Max input level
- Unbalanced +6 dBV; balanced +20.3 dBV
- Front panel
- Power switch and volume (left monitor), 3.5 mm headphone jack
- S/N
- ≥ 85 dB
- Power
- 220 VAC ±10%, 50–60 Hz
- Enclosure
- 9 mm MDF, PVC finish, ABS + PC baffle
- Dimensions (W × H × D)
- 142.2 × 243.5 × 171 mm (each)
- Weight
- 4.35 kg per pair
Description
The JBL NANO K4 is a pair of 4-inch powered monitors, sold as a master and an extension speaker, for small studios, desk setups and content creation spaces. Alongside its wired inputs it has Bluetooth, so you can check a mix from a phone or simply play music.
Highlights
- 4″ woofer and 20 mm tweeter per speaker, with Class AB amplification (JBL lists 50 W for the woofer and 50 W for the tweeter).
- Image Control Waveguide, derived from JBL's M2 Master Reference Monitor.
- Tweeter and woofer placed for aligned acoustic centres.
- Bluetooth, RCA and AUX (unbalanced) plus balanced TRS inputs.
- Power switch, volume control and 3.5 mm headphone jack on the front.
- Dual-plane base for upright or 12° tilted placement, and an M8 thread for mic-stand mounting.
In your setup
Plug a computer, audio interface, mixer or DJ controller with RCA or TRS outputs into the speakers, and pair a phone over Bluetooth for quick reference checks. With a 99 dB maximum SPL, JBL positions the NANO K4 for small studios and production desks. The pair runs on 220 V AC (±10%), matching mains power in Vietnam, and the orange ring around each woofer gives it a recognisable look.



