• 6.5 inch low mid frequency loudspeaker designed for strong midbass and vocal clarity
• Handles 125W RMS and 250W max with high efficiency 91 dB sensitivity
• Sealed back steel basket isolates rear wave for clean sound and easy installs
• 1.5 inch high-temperature KSV voice coil with improved ventilation for durability
• Ideal for vehicle doors, pro audio builds, and tight mounting locations

6.5" 125W RMS 8 Ohm Low Mid Frequency Loudspeaker Sealed Back APMB-6SB-E

This Listing Includes:

• (1) APMB-6SB-E 6.5 inch Low Mid Frequency Loudspeaker

The APMB-6SB-E is a 6.5 inch low mid-range loudspeaker engineered for powerful midbass performance, clean vocal reproduction, and reliable operation in demanding audio systems. Designed as part of the Low Mid-Range Series, this speaker uses a cloth edge surround to enhance low-frequency response while maintaining clarity across the midrange.

Its sealed back steel basket design isolates the rear wave, protecting the speaker from external interference and eliminating the need for additional enclosure volume. This makes it ideal for tight installations, door panels, pro audio builds, and vehicle applications where space and control matter.

At the core is a 1.5 inch high-temperature KSV voice coil with improved ventilation, delivering consistent performance and durability under continuous power. With 125 watts RMS handling, 250 watts peak power, and high sensitivity, the APMB-6SB-E delivers strong output with excellent efficiency.

Easy-mount installation points, a rigid steel basket, and a 20 oz ferrite magnet complete a speaker built for performance, reliability, and clean sound reproduction.

Specifications:

• Model: APMB-6SB-E


• Speaker Size: 6.5 inch


• Nominal Impedance: 8 Ohm


• RMS Power Handling: 125 Watts


• Maximum Power Handling: 250 Watts


• Sensitivity: 91 dB (1W/1m)


• Frequency Response: 350 Hz – 5 kHz


• Voice Coil Diameter: 1.5 inch


• Voice Coil Former Material: KSV


• Winding Material: EISV


• Cone Material: Paper


• Surround Material: Cloth


• Basket Material: Steel


• Magnet Material: Ferrite


• Magnet Weight: 20 oz


• Design: Sealed back steel basket

Thiele and Small Parameters:

• Vas: 0.31 ft


• Fs: 470 Hz


• Qms: 2.05


• Qes: 1.76


• Qts: 1.0


• Mms: 24 g


• Cms: 63 m/N


• BL: 12


• Le: 0.18 mH


• Sd: 137 cm


• Re: 7.4 Ohms


• Mmd: 20 g

Dimensions:

• Overall Diameter: 6.6 inch (167 mm)


• Overall Depth: 2.5 inch (64 mm)


• Mounting Depth: 2.4 inch (60 mm)


• Front Mount Baffle Cutout: 5.7 inch (145 mm)


• Motor Diameter: 4.5 inch (115 mm)