Photo of this unit coming soon Fostex 6301NB 4" Active Monitor Speaker 20W D-Class (Single)

About this unit

Single Fostex 6301NB compact active monitor speaker with a 4" full‑range driver and built‑in 20W Class‑D amplifier. Designed for professional studios and broadcast environments where a small, durable reference speaker is needed. Provides unbalanced 1/4" TS analog input and a sealed die‑cast aluminum enclosure for stable, consistent monitoring performance.

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Fostex 6301NB 4" Active Monitor Speaker 20W D-Class (Single)

Fostex 6301NB

Fair — cosmetic wear 2 in stock ITEM-137
$131.67 $399.00

Plus 6% tax ($7.90) — $139.57 total. Shipping quoted separately.

Only 2 left in stock.

Local pickup in Philadelphia, PA. Shipping is quoted per order based on size, weight and destination. We will email a shipping quote for your approval before any payment is due.
Condition
Fair — cosmetic wear
Category
Audio
Item ref
ITEM-137

Full specifications

Manufacturer specifications for this model. Anything specific to this individual unit — wear, repairs, included accessories — is noted above.

Driver Size 4 inch full-range cone driver[3][8]
Amplifier Power 20 W Class-D built-in amplifier[3][6][8]
Frequency Response 70 Hz – 15 kHz[2][3][8]
Sound Pressure Level 85 dB/W (1 m)[3][8]
Max Spl 98 dB[3][8]
Enclosure Type Sealed (closed) die-cast aluminum cabinet[1][3][8]
Analog Input Type 1/4" TS phone, unbalanced[2][3][8]
Input Impedance 10 kΩ or more (analog input)[2][3][8]
Input Sensitivity -14 dBV (0.2 Vrms) for 1/4" TS input[2][3][8]
Total Harmonic Distortion 0.05% (1 kHz / 1 W output)[2][3][8]
Residual Noise -70 dBV or less[2][3][8]
Auto Standby Activates after approx. 25 minutes of low input level[2][8]
Power Requirement AC 100–240 V, 50/60 Hz universal input[2][4][8]
Power Consumption 10 W (less than 0.5 W in standby)[2][4][8]
Dimensions Mm 120 (W) × 189 (H) × 120 (D) mm[2][3][4][8]
Dimensions In 4.72 (W) × 7.44 (H) × 4.72 (D) in[4][8][9]
Weight Kg Approx. 2.2 kg[2][3]
Weight Lb Approx. 6.0 lb[7][9]
Mounting Type Tabletop / shelf use; rear M6 mounting point (per manual)[5]
Number Of Speakers Included Single speaker (sold per unit)[6][7][8]
Connector Type 1/4" TS phone jack (no XLR or digital on NB model)[2][3][8]

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