3-way 12" (300mm) Bookshelf Loudspeaker

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The JBL® 4425 studio monitor, introduced in 1985, was the company’s first compression-driver system with a Bi-Radial® horn and large-format woofer, designed to give true studio performance in transportable size without the need for subwoofer augmentation. The new JBL 4429 incorporates a number of important improvements over the 4425 and its successors. A UHF transducer, an improved HF compression driver and horn design, a new crossover network and improved internal bracing combine to give the 4429 an advantage in the naturalness, clarity and detail of its sound relative to previous models. Effortlessly delivering the full bandwidth and dynamics of the newest digital media – without suppression at any listening level – the 4429 reveals subtleties you may never before have experienced in recorded music. Every detail of the design and construction of this system has been directed toward a single goal: uncompromised sonic performance. Featuring a massive, 300mm woofer, and large HF and UHF compression drivers with a one-piece SonoGlass® horn, the 4429 delivers quick, tight bass, a natural, well-focused midrange and clear, distinct highs to create listening experiences with all the richness and detail of the original performances.


Print Specifications
Low-frequency transducer300mm pure-pulp cone woofer 1200FE-8
High-frequency transducer50mm titanium diaphragm 175Nd-3
Ultrahigh-frequency transducer19mm titanium diaphragm 138Nd
Recommended amplifier power200 watts RMS
Frequency response40Hz – 45kHz (–6dB)
Nominal impedance6 ohms
Sensitivity91dB (2.83V/1m)
Crossover frequencies800Hz, 7kHz
ControlsAttenuators for MF and HF drivers
Enclosure type25mm (1")-thick MDF (medium-density fibreboard) stock, ported
Connector typeDual gold-plated five-way binding posts
FinishTopcoated walnut veneer
Grille colourMonitor Blue
Dimensions (H x W x D)635mm x 400mm x 300mm (25" x 15-3/4" x 12")
Weight32.3kg (71 lb)

Awards & Reviews

2017 The Speaker Shack Review and Outstanding Badge