Kramer CL-4P 4-inch 2-Way Passive Ceiling Speaker

The Kramer CL‑4P is a plenum-rated in-ceiling speaker that delivers precise sound reproduction and a modern, unobtrusive design for demanding audio applications in conference rooms, educational facilities, and public spaces.

Technical specifications at a glance:

• Type: 4″ two-way coaxial in-ceiling speaker, closed back
• Certification: Plenum rated UL2043 & UL1480A, TAA compliant
• Power: 20 W (rms) continuous (pink noise) / 30 W (rms) continuous (programmed) at 8 Ω; alternative high-voltage options (70V/100V)
• Sensitivity: 87 dB SPL (1 W@1 m, free field)
• Max. sound pressure level: 100 dB SPL (continuous), 102 dB SPL (peak)
• Frequency range: –10 dB: 90 Hz–18kHz, ±3 dB: 110 Hz–18kHz
• Mounting: In-ceiling installation with C-ring, 3-point screw-down dog-ear clamp (up to 60 mm ceiling thickness)
• Materials: LF driver (100 mm, polypropylene, rubber surround), HF driver (19 mm, liquid-cooled, soft dome), ABS765A and powder-coated steel

Precise sound reproduction and midrange optimization

The CL‑4P impresses with its 100 mm LF driver with polypropylene cone and 19 mm liquid-cooled soft dome HF driver, which together deliver balanced sound with a particular focus on speech intelligibility and background music. The optimized midrange ensures that conversations and acoustic content are reproduced clearly and distinctly.

Robust technology and secure installation

The speaker meets the highest safety and fire protection standards, as confirmed by its UL2043 and UL1480A certifications. Thanks to its plenum-rated design, it can be used with absolute confidence in ventilated installation spaces, as the device has been specifically tested against strict fire protection and smoke behavior requirements. Tool-free front access for wiring and the included cutout template enable fast, precise installation, while the 3-point mounting ensures reliable anchoring in ceilings up to 60 mm thick.

Elegant, low-profile design and flexible connection options

The flat, lightweight design of the CL‑4P enables integration into ceilings with limited space without compromising sound quality. With dual impedance options (8 Ω and 70V/100V), the speaker flexibly adapts to different system requirements. The included bezel-less, magnetic grille covers not only offer an attractive appearance but also versatile design options for installation.

Environmentally friendly packaging and comprehensive accessories

The sustainable mono-material packaging made from recyclable cardboard underscores the commitment to environmental responsibility while ensuring reliable protection during transport. In addition to the speaker, the delivery includes a C-ring, two magnetic grilles (white and black), a Euroblock terminal block, a cutout template, and various accessories such as mounting bolts, UL-compliant silicone-based cable grommets, and a cable fastening eye, ensuring a complete and hassle-free installation.