PSB CS AIC 860 Angled In-Ceiling

PSB CS AIC 860 Angled In-Ceiling Speaker at Vinyl Sound Buffalo NY

The PSB CS AIC 860 is an angled in-ceiling speaker built around a 6½-inch fiber-filled polypropylene woofer and a 1-inch titanium dome tweeter with a pivoting wave guide, delivering a frequency response of 48Hz to 20,000Hz (±3dB) — among the deepest bass extension specifications available in a residential in-ceiling speaker format. Available at Vinyl Sound in Buffalo, New York, the CS AIC 860 features individual EQ level adjustment switches for both the tweeter and woofer, allowing on-site acoustic calibration to compensate for room boundary effects, ceiling height variation, and listening distance. The wave guide tweeter rotates on an indexed axis, enabling the high-frequency acoustic axis to be aimed precisely at the primary listening position independently of the physical installation angle. An open-back design allows installation without an enclosure, with an optional integrated acoustic backbox available for installations requiring fire-rated ceiling compliance or consistent acoustic performance independent of the ceiling cavity volume. Both frameless round and square grilles are available. Final voicing was performed by PSB Founder and Chief Designer Paul Barton at Canada's National Research Council. The CS AIC 860 is part of Vinyl Sound Buffalo's full speaker collection, which covers in-ceiling, in-wall, outdoor, powered, and floorstanding speakers from leading audio brands.

Pivoting Wave Guide Tweeter, 6.5" Woofer, and EQ Switches

The CS AIC 860's 1-inch titanium dome tweeter is mounted in a wave guide that both controls high-frequency dispersion and pivots on an indexed axis, allowing the tweeter's acoustic axis to be rotated toward the primary listening position after installation. The indexed detent positions allow the installer to set the tweeter angle to a specific pointing direction and verify it is securely locked rather than floating freely. Wave guides reduce the effective acoustic size of the tweeter aperture at high frequencies, which narrows the radiation pattern in a controlled and predictable way and allows more precise aim of the on-axis high-frequency response at the listener. The 6½-inch woofer's fiber-filled polypropylene cone is installed on an injection-molded basket at an angle that aligns the woofer's axis toward the listening position, consistent with the angled baffle principle shared with the C-LCR. Individual EQ level switches for the tweeter and woofer provide boost or cut at the speaker enclosure, allowing the installer to compensate for high-frequency brightness from reflective room surfaces or bass emphasis from ceiling-boundary proximity without requiring external equalization from the amplifier or receiver.

Open-Back Design, Optional Backbox, and Installation

The CS AIC 860's open-back design installs without a dedicated rear enclosure, using the ceiling cavity volume as a natural acoustic chamber behind the woofer. This allows rapid installation without fitting a backcan during the rough-in phase and takes advantage of a large ceiling cavity to extend bass output. However, open-back performance varies with ceiling cavity volume, surrounding insulation, and proximity to HVAC ducts or structural elements, which affect the acoustic loading on the woofer's rear cone. The optional integrated acoustic backbox provides a controlled, consistent enclosure volume behind the woofer regardless of ceiling cavity conditions — recommended for fire-rated ceiling assemblies where the ceiling cavity must be sealed, for attic-adjacent installations where temperature extremes would affect an open cavity, and for installations where consistent bass performance between multiple speaker positions is critical. Gold-plated spring-loaded connectors accept up to 12 AWG wire, reducing connection resistance on longer in-wall cable runs between the amplifier and speaker positions.

Specifications

Frequently Asked Questions

What does the pivoting wave guide tweeter do on the CS AIC 860?

The CS AIC 860's tweeter is mounted inside a wave guide that serves two functions. First, it controls the tweeter's high-frequency dispersion pattern — a wave guide reduces the tweeter's effective aperture at high frequencies, narrowing the radiation pattern in a predictable way and reducing the level of high-frequency energy reflected from the ceiling surface surrounding the speaker. Second, the entire wave guide assembly rotates on an indexed axis, allowing the installer to point the tweeter's on-axis high-frequency response toward the primary listening position on the floor below. Because the tweeter is physically the highest-directivity driver at the highest frequencies, adjusting where it points has the largest perceptible effect on the clarity and brightness of the speaker's sound at the listening position.

What do the EQ adjustment switches do?

The CS AIC 860 includes two separate level adjustment switches — one for the tweeter and one for the woofer — accessible from the front of the speaker after grille removal. These switches provide level boost or cut at each driver independently, allowing the installer to adjust the speaker's tonal balance on-site to account for room-specific acoustic conditions. Tweeter level cut is commonly applied in rooms with highly reflective ceiling surfaces that emphasize high-frequency energy, or when the speaker is installed at closer-than-typical listening distances. Woofer level adjustment compensates for bass buildup from ceiling-boundary proximity, which can make bass frequencies sound boomy when the speaker is close to a wall junction. The ability to set each driver level independently provides more precise on-site calibration than a single global level trim switch.

What is the difference between open-back installation and the optional backbox?

An open-back installation relies on the ceiling plenum cavity behind the speaker as the acoustic chamber. The plenum volume, insulation, and surrounding structural elements all affect bass output and midrange coloration in an open-back installation, which means the CS AIC 860's measured performance may vary between installation positions with different ceiling cavity conditions. The optional integrated acoustic backbox provides a sealed, fixed-volume enclosure that clips behind the speaker cutout and gives the woofer a consistent acoustic load regardless of the ceiling cavity. The backbox is required or strongly recommended in fire-rated ceiling assemblies where the plenum must be acoustically sealed, in heated or cooled attic-adjacent spaces where temperature extremes affect the cavity, and in any installation where consistent bass performance between multiple speaker positions is a priority.

How does the CS AIC 860 compare to the C-LCR in-ceiling speaker?

The CS AIC 860 uses a single 6½-inch woofer mounted at an angle in a round cutout (9¾" diameter), while the C-LCR uses dual 5¼-inch woofers in an MTM array in a square cutout (13³⁄₁₆" × 13³⁄₁₆"). The CS AIC 860 has a deeper bass extension at 48Hz (±3dB) compared to the C-LCR's 65Hz, with higher 86dB sensitivity and 8-ohm nominal impedance making it easier to drive from standard AV receivers. The CS AIC 860 adds individual EQ tweeter and woofer level switches, an indexed pivoting wave guide tweeter for on-site high-frequency aiming, and the optional backbox for fire-rated or variable-cavity installations. The C-LCR uses a sealed enclosure and derives its drivers from the Imagine Series. The AIC 860 is positioned as a more versatile single-point ceiling solution with more on-site tuning flexibility; the C-LCR is positioned as a premium LCR installation with Imagine Series driver pedigree.

Is the CS AIC 860 mounting hole round or square?

The standard CS AIC 860 mounting hole is round — 9¾-inch (245mm) diameter — suited for installation between ceiling joists without the need to align a rectangular cutout parallel to the joist direction. A round hole saw or jab saw cuts the rough-in opening quickly without template marking. The frameless grille is 10¾ inches (272mm) in diameter, covering the rough-in cutout edge. PSB also supplies a frameless square grille option for installations where a square ceiling grille appearance is preferred aesthetically over the round profile — both grille styles fit the same round 9¾-inch mounting hole.

What amplifier power does the PSB CS AIC 860 need?

The CS AIC 860's recommended power range is 10–100 watts into its nominal 8-ohm load, with a minimum impedance of 6 ohms. The 86dB anechoic sensitivity and 8-ohm nominal impedance make it one of the easier-to-drive PSB in-ceiling options — a 50-watt per channel AV receiver will produce approximately 103dB at one meter, which is more than adequate for typical ceiling-to-floor listening distances in home theater applications. The 100-watt maximum is conservative; the gold-plated 12AWG spring-loaded connectors are rated for substantial current, but the speaker's program power specification should be confirmed with PSB directly for sustained high-output commercial use.

Where to buy PSB CS AIC 860 in-ceiling speakers in Buffalo NY?

The PSB CS AIC 860 is available from Vinyl Sound, an authorized PSB Speakers dealer in Buffalo, New York. Vinyl Sound also carries the C-LCR sealed in-ceiling speaker and the W-LCR in-wall speaker for comparison across PSB's architectural speaker range. Free shipping is available across the continental United States. Contact Vinyl Sound Buffalo by phone or email to purchase the CS AIC 860, inquire about the optional backbox, or discuss ceiling installation and amplifier requirements for your home theater project.