Pure Resonance Audio C5 4 Inch 70V Micro Ceiling Speaker

Compact Ceiling Speaker for Music, Paging and Sound Masking

The Pure Resonance Audio C5 is a compact 4" full-range ceiling speaker designed for background music, foreground music, paging, and sound-masking applications. Sold individually, it combines a small recessed footprint with flexible 70V, 100V, and 8-ohm operation for offices, retail stores, restaurants, hotels, reception areas, waiting rooms, classrooms, and other distributed-audio installations.

The C5 uses a full-range 4" paper-cone driver with a butyl rubber surround and provides broad 120° × 120° nominal coverage for even sound distribution across the listening area.

Key Specifications

• Model: C5
• Product type: Full-range ceiling speaker
• Sold as: Single speaker
• Driver: 4" paper cone with butyl rubber surround
• RMS power rating: 10W
• Frequency response: 90Hz–20kHz
• Nominal impedance: 8 ohms in bypass mode
• Sensitivity: 91dB ±3dB
• Maximum SPL: 104dB ±3dB
• Nominal coverage: 120° × 120°
• Transformer: Built-in 70V/100V multi-tap transformer
• Connection: 4-pin Euroblock screw terminal
• Mounting: Threaded Easy-Mounting ring included

Who Should Choose the C5?

Choose the C5 when you need a discreet ceiling speaker for speech, background music, foreground music, or sound masking and want the flexibility to use either a distributed-voltage system or a conventional 8-ohm amplifier.

Its compact footprint and wide coverage make it especially useful where larger ceiling speakers would be visually intrusive.

4-Inch Full-Range Driver

The C5 uses a 4" full-range paper-cone driver with a butyl rubber surround.

The single-driver design keeps the enclosure compact while providing broad frequency coverage for speech and general music reproduction.

10W RMS Power Rating

Pure Resonance Audio rates the C5 at 10W RMS.

When used in 8-ohm bypass mode, the manufacturer also specifies a maximum input voltage of 12.8V, equivalent to 20W into an 8-ohm load.

70V and 100V Distributed-Audio Operation

The built-in transformer provides selectable taps for distributed-audio systems:

• 70V: 2.5W, 5W, or 10W
• 100V: 5W, 10W, or 20W

When using multiple speakers on a 70V or 100V amplifier, add the selected tap wattages and allow appropriate amplifier headroom.

Selectable 8-Ohm Bypass

The C5 also provides an 8-ohm bypass setting for connection to a compatible low-impedance amplifier.

Confirm the total connected impedance before wiring multiple speakers to the same amplifier channel.

120° × 120° Coverage

Pure Resonance Audio specifies a nominal 120° × 120° coverage pattern, helping distribute sound broadly across the listening area.

Actual coverage and speaker spacing depend on ceiling height, room geometry, background noise, and required listening level.

90Hz–20kHz Frequency Response

The C5 is rated for a 90Hz–20kHz frequency response with 91dB ±3dB sensitivity and maximum output of approximately 104dB ±3dB.

This makes it well suited to speech, paging, sound masking, and general background or foreground music.

Compact Recessed Installation

The C5 uses a recessed enclosure and ultra-thin bezel designed to blend into drop-tile and other compatible ceiling installations.

• Ceiling cutout: 6.25" (158.75 mm)
• Overall diameter: 6.7" (170.2 mm)
• Mounting depth without connector: 5.24" (132.84 mm)
• Mounting depth with connector: 5.51" (139.83 mm)
• Weight: 2.93 lb (1.33 kg)

Easy-Mounting Ring Included

The included threaded Easy-Mounting ring allows the speaker to be secured quickly in compatible drop-tile ceiling installations.

For additional support or different ceiling types, Pure Resonance Audio offers optional C5-TB tile bridges and C5-DM drywall-mount accessories.

Euroblock Speaker Connection

The C5 uses a 4-pin Euroblock screw-terminal connector for speaker wiring.

Use appropriately rated speaker wire based on the amplifier type, system voltage, and cable length.

What's Included?

• 1 Pure Resonance Audio C5 4" ceiling speaker
• 1 threaded Easy-Mounting ring

Amplifier, speaker wire, tile bridge, drywall mounting kit, and pendant mounting kit are sold separately unless specifically included in another package.

Complete Your Ceiling Audio System

• Pure Resonance Audio
• In-Wall & In-Ceiling Speakers
• Speaker Wire

Need Help Planning Your Speaker System?

Send Bear Security Shop your room dimensions, ceiling height, speaker quantity, and amplifier model. We can help confirm transformer tap settings, amplifier power, and whether 70V, 100V, or 8-ohm operation makes the most sense.

Is the Pure Resonance Audio C5 sold individually or as a pair?

The C5 is sold individually.

What size driver does the C5 use?

The C5 uses a 4" full-range paper-cone driver with a butyl rubber surround.

What is the power rating?

Pure Resonance Audio rates the C5 at 10W RMS.

Does the C5 support 70V systems?

Yes. Available 70V taps are 2.5W, 5W, and 10W.

Does it support 100V systems?

Yes. Available 100V taps are 5W, 10W, and 20W.

Can I use the C5 with an 8-ohm amplifier?

Yes. The C5 includes a selectable 8-ohm bypass for use with a compatible low-impedance amplifier.

What is the frequency response?

Pure Resonance Audio specifies a 90Hz–20kHz frequency response.

What is the sensitivity?

The C5 is rated at 91dB ±3dB sensitivity.

What is the maximum SPL?

Pure Resonance Audio specifies approximately 104dB ±3dB maximum SPL.

What is the coverage pattern?

The C5 provides nominal 120° × 120° coverage.

What size ceiling cutout is required?

The required ceiling cutout is approximately 6.25" in diameter.

How much mounting depth is required?

The C5 requires approximately 5.24" of depth without the connector or 5.51" with the connector installed.

What type of speaker connection does it use?

The C5 uses a 4-pin Euroblock screw-terminal connector.

Is mounting hardware included?

Yes. The C5 includes a threaded Easy-Mounting ring. Optional tile-bridge, drywall-mount, and pendant-mount accessories are sold separately.