PSB CS610
Overview
The PSB CS610 is a 2-way in-ceiling loudspeaker developed from the brand’s more than forty years of accumulated experience. Designed in the anechoic chambers of the National Research Council of Canada, it features a 165 mm carbon-loaded polypropylene woofer and a pivoting 19 mm aluminum dome tweeter. Its in-ceiling format allows seamless integration into home audio or home theater systems, delivering sound true to PSB’s sonic signature.
Technical design in service of musicality
The CS610 is built around a 165 mm polypropylene woofer loaded with carbon particles, a composite material PSB has used for years for its distinctive acoustic properties. This rigid yet lightweight cone provides a balanced response in the mid-bass range, with remarkable power handling thanks to its high-temperature voice coil. The cone is mounted on a compliant rubber surround that ensures controlled excursion and limits distortion, even at higher listening levels.
The 19 mm black anodized aluminum dome tweeter is the other defining element of this speaker. Positioned concentrically at the center of the woofer, it uses a ball-joint mount that allows precise aiming toward the listening area. This clever mechanical design is complemented by a carefully engineered waveguide that extends the tweeter’s response toward lower frequencies, creating a smooth transition with the woofer in the crossover region. Ferrofluid in the magnetic gap improves thermal dissipation and dome motion control.
A precision crossover ensures optimal frequency distribution between the two transducers. This passive filter, the result of PSB’s acoustic tuning expertise, delivers a smooth, natural wideband response with no noticeable irregularities in the transition zone. The resulting time coherence enables precise imaging, even in ceiling-mounted installations.
Installation flexibility and acoustic adjustment
The CS610 has been designed to simplify installation for both professionals and DIYers. The mounting system uses robust dogleg clamps that automatically deploy behind the wall as the screws are tightened. This rotating-cam mechanism provides a firm, long-lasting hold without risking damage to the surface. Included cutout templates make it easy to prepare the required 212 mm circular opening, while the 114 mm mounting depth is compatible with most standard drop ceilings.
PSB also offers optional accessories for more complex installations: pre-construction brackets let you reserve speaker locations before the ceiling is installed, and backcans can be added to acoustically isolate the speaker from the ceiling cavity, improving bass definition and limiting sound transmission to adjacent spaces.
A front-accessible switch lets you adjust the tweeter level from 0 dB to +3 dB. This feature allows fine-tuning of the treble response to suit room acoustics and listening preferences. In a very absorbent environment or to compensate for an off-axis listening position, the +3 dB setting restores sparkle and presence to the high frequencies. Conversely, in a reverberant room with hard surfaces, the neutral position avoids excessive brightness.
Visual integration and aesthetic versatility
PSB supplies the CS610 with two types of frameless magnetic grilles: a round version with a 240 mm diameter and a square version measuring 240 x 240 mm. These white-painted perforated steel grilles snap into place instantly thanks to high-strength magnets, with no visible screws or clips. The zero-bezel design enables near-invisible integration into the ceiling, with only the fine perforation of the grille remaining visible.
Both grilles can be repainted to perfectly match the ceiling color. The steel structure accepts acrylic or alkyd paints, preferably applied with a spray gun to preserve perforation uniformity. This aesthetic flexibility allows the speaker to blend with any interior decor, from classic whites to bolder tones in contemporary spaces.
An invisible scrim backing the grille protects the drivers from dust while remaining acoustically transparent. This technical fabric keeps the grille’s appearance uniform while preserving the speaker’s sonic performance.
Technical Specifications
Highlights
- Precision crossover for a smooth, natural wideband response
- Pivoting tweeter to tailor acoustics to the room
- Tweeter level adjustment to optimize high frequencies
- Simplified installation with complete accessories
- Discreet architectural integration thanks to paintable magnetic grilles
Drivers
- 16.5 cm carbon-loaded polypropylene woofer
- Rubber surround
- Warm, balanced sound with high power handling
- 1.9 cm black anodized aluminum dome tweeter
- Mounted concentrically on a swivel with waveguide
- Ferrofluid for optimal cooling
- Aimable to fine-tune sound imaging
- Optimized dispersion for the listening position
Acoustic Performance
- On-axis frequency response at 0° ±3 dB: 50 – 20,000 Hz
- Sensitivity
- Anechoic chamber: 86 dB
- Listening room: 88 dB
- Impedance
- Nominal: 6 Ω
- Minimum: 4 Ω
- Recommended input power: 10 – 100 W
- Acoustic design: 2-way open-back speaker
- EQ setting: tweeter level switch
Installation and Dimensions
- Mounting depth: 11.4 cm
- Cutout diameter: 21.2 cm
- Simplified installation with robust mounting clamps
- Cutout templates included
- Round grille: 24 cm diameter
- Square grille: 24 x 24 cm
Finish and Accessories
- Finish: white
- Frameless magnetic grilles: round and square included
- Paintable grilles for discreet integration
- Available accessories: pre-construction brackets and back boxes
Frequently Asked Questions
Is the CS610 suitable for use in a Dolby Atmos setup?
Absolutely. The CS610 integrates perfectly into a modern home theater as a height-effects speaker for Dolby Atmos or DTS:X formats. Its ability to aim the tweeter toward the listening area optimizes the precise localization of overhead effects, while its extended 50 Hz–20 kHz response covers the full spectrum required by contemporary soundtracks.
What is the difference between the CS610, CS630, and CS650 models in the CustomSound range?
The CS610 is the entry-level model with a 165 mm woofer and a 19 mm aluminum tweeter. The CS630 uses the same woofer but with a dual voice coil and two tweeters, enabling stereo playback from a single speaker. The CS650, the premium model, features an upgraded woofer technology borrowed from the Imagine T3 speakers and a 25 mm titanium tweeter with an indexed waveguide for even finer adjustment.
Do the binding posts accept all types of cables?
The CS610’s gold-plated spring terminals accept multiple connection formats: bare wire up to 12 AWG, single banana plugs, and pin connectors. This versatility simplifies installation with existing wiring, whether in professional or residential setups.
Can the CS610 be installed in a bathroom or kitchen?
While robust, the CS610 is not specifically designed for humid environments. For bathrooms or kitchens, install in areas least exposed to water splashes and steam. PSB’s outdoor models like the CS500 are more appropriate for truly challenging conditions.
How do I determine the number of speakers needed for a room?
The number of speakers depends on the room size, ceiling height, and intended use. For background music, plan on one pair for roughly 20–30 m². In a home theater setup, follow the recommendations of the chosen format: two speakers for rear effects, and two to four for Atmos height effects. The CS610’s aimable tweeter helps optimize coverage even with a limited number of speakers.
The recommended amplification of 10 to 100 watts seems broad. What power should I actually choose?
This wide range reflects the CS610’s versatility. With 10 watts, you’ll already achieve a comfortable level for background listening thanks to its 88 dB sensitivity. For dynamic listening or home theater use, 50 to 75 watts per channel will provide comfortable headroom without risking damage to the drivers. The woofer’s high-temperature voice coil tolerates occasional power peaks up to 100 watts.
- Eco-contribution included in the sale price.
