KRK S10.4 Studio Subwoofer

KRK S10G4 — Active Studio Subwoofer for Extended Low End

The KRK S10G4 is an active studio subwoofer extending the low end of near-field monitoring setups. A 10" glass-aramid woofer and 160 W Class D amplifier deliver a maximum SPL of 117 dB with bass extension to 27 Hz. The reinforced MDF cabinet and front-firing port keep the cabinet stable. This model suits engineers working on electronic, hip-hop, and film-scoring projects.

What Sets This Sub Apart in Its Category

Unlike many entry-level subs, this unit includes a four-position crossover (60, 70, 80, 90 Hz) with a matching high-pass filter on the monitor outputs, preventing overlap and phase cancellation. The optional footswitch bypass routes full-range audio back to the monitors.

Driver and Amplification — Headroom and Control

The Class D amplifier keeps the cabinet light and cool while delivering the transient response needed for kick drums and sub-bass layers. The glass-aramid cone balances stiffness and damping so transients stay defined.

• LF Driver: 10" glass-aramid composite woofer — stiff, low-distortion cone for tight transients
• Amplifier Power: 160 W Class D — high headroom, low thermal load
• Max SPL: 117 dB — enough output for near-field and small-room monitoring

Frequency Range and Crossover — Tuning to Your Monitors

The crossover is the key integration point between sub and satellites. Polarity inversion, input sensitivity, and ground-lift switches dial out phase and hum problems.

• Frequency Range: 27 Hz – 156 Hz — extends below typical near-field monitor response
• Crossover: 60 / 70 / 80 / 90 Hz selectable — matches common 5"–8" monitor low-end limits
• HPF Bypass: via optional footswitch — instant A/B between full-range and sub-filtered monitoring

Connectivity and Physical Integration

Universal I/O lets the sub slot into almost any existing rig without adapter cables. The reinforced MDF enclosure and universal-voltage power supply make installation straightforward.

• Inputs: Balanced XLR, 6.3 mm TRS, RCA, footswitch — covers pro and consumer gear
• Outputs: XLR, 6.3 mm TRS, RCA — pass-through to monitors
• Dimensions: 341 × 479 × 310 mm, Weight: 15.88 kg — fits under most desks