# JBL 308P MkIII

Studio monitor active loudspeaker from the 3 Series MkIII series, made by JBL (🇺🇸 US).

Source: https://truescaleaudio.com/en/speaker/jbl-308p-mkiii
Manufacturer page: https://jblpro.com/en/products/308p-mkiii

## Dimensions

| Dimension | Metric | Imperial |
| --- | --- | --- |
| Height | 444 mm | 17.5 in |
| Width | 249 mm | 9.8 in |
| Depth | 296 mm | 11.7 in |
| Weight (each) | 8.8 kg | 19 lb |

## Drivers

- 1 × 25 mm (1 in) tweeter — soft dome, in the JBL Image Control Waveguide; 120° × 90° coverage
- 1 × 203 mm (8 in) woofer — redesigned MkIII cone, materials and magnet assembly

## Specifications

| Specification | Value |
| --- | --- |
| Type | Studio monitor |
| Power | Active |
| Enclosure | Bass reflex, front port |
| Frequency response | 49–27000 Hz (±3 dB) |
| Crossover | 1960 Hz |
| Built-in amplification | 110 W per speaker |
| Introduced | 2026 |

## About

The largest two-way of the MkIII family: an 8-inch woofer down to 49 Hz and 113 dB peak, in a 444 mm cabinet that is a different proposition from the 305P on a desk. It shares the 306P's 110 W of Class-D rather than adding power, so the gain is cone area and headroom, not watts. Front-firing Slipstream port, 81 one-touch room-EQ presets. Announced November 2026, shipping in North America from January 2027.

## See it to scale

This catalogue draws cabinets at their real size side by side, which no text version can reproduce. Compare the JBL 308P MkIII against another speaker at https://truescaleaudio.com/en/compare?a=jbl-308p-mkiii