PSB CS810 8" In-Ceiling Speaker

PSB CS810 8" In-Ceiling Speaker at Vinyl Sound Buffalo NY

The PSB CS810 is an 8-inch two-way flush-mount in-ceiling speaker designed for whole-home audio and home theater installations, pairing an 8-inch polypropylene cone woofer with a cast basket and foam surround against a 1-inch ferrofluid-cooled titanium dome tweeter with a wave guide and ball-joint pivot mount. Available at Vinyl Sound in Buffalo, New York, the CS810 delivers a frequency response of 48Hz to 20,000Hz (±3dB) at 85dB anechoic sensitivity into a nominal 8-ohm load, with a 3,100Hz Linkwitz-Riley 4th-order (LR4) crossover providing 24dB per octave driver rolloff through the crossover frequency. A high-temperature voice coil in the woofer extends power handling capacity for sustained-level whole-home audio installations. A dual-position high-frequency level switch allows on-site tweeter calibration to compensate for room acoustic conditions. The open-back design uses the ceiling plenum as the acoustic chamber, and both round (10⅝" diameter) and square (10¾") magnetic frameless grilles are included. The 9¾-inch round cutout is the same diameter as the CS850 and CS AIC 860, allowing the CS810 to be installed in the same rough-in opening. The CS810 is part of Vinyl Sound Buffalo's full speaker collection, which includes in-ceiling, in-wall, outdoor, powered, and floorstanding speakers from leading audio brands.

8" Woofer with Cast Basket, High-Temperature Voice Coil, and LR4 Crossover

The CS810's 8-inch woofer uses a cast basket — a basket formed by pouring molten metal into a mold rather than stamping a steel sheet — which provides a more rigid, precisely dimensioned driver frame with better dimensional stability under heat and sustained output levels. The polypropylene cone is bonded to a foam surround that provides a compliant, consistent suspension throughout the woofer's excursion range. The high-temperature voice coil is wound with a material that maintains its adhesive bonds and dimensional tolerances at elevated temperatures encountered during high-output sustained playback, which is relevant in whole-home audio applications where background music runs at continuous levels for many hours. The 3,100Hz LR4 crossover delivers the audio signal to the 1-inch titanium dome tweeter at a frequency where the 8-inch woofer's cone motion is already well managed, preventing the high-frequency distortion that occurs when a large-diameter woofer is operated at frequencies where its cone begins to flex and break up rather than moving as a rigid piston.

Ball-Joint Tweeter, HF Switch, and Installation

The CS810's tweeter is mounted on a ball-joint pivot assembly that allows continuous angular adjustment in any direction within its range of travel — different from the indexed detent adjustment on the CS850, which locks the tweeter into specific calibrated positions. The ball-joint provides finer angular resolution for installations where the exact aim angle falls between indexed detent positions, at the cost of not providing tactile confirmation of a specific set angle. The dual-position high-frequency level switch reduces or boosts tweeter output to compensate for listening room treble response variations — useful in rooms with reflective tile or glass surfaces that accumulate high-frequency energy, or in installations with significantly above-average ceiling height where the tweeter output arrives at the listening position with greater air-path attenuation. The heavy-duty dogleg mounting system clamps the CS810 to the drywall from the front face after insertion through the 9¾-inch cutout, without requiring above-ceiling access. At 4.95 lb (2.25 kg), the CS810 is manageable for a single-person installation.

Specifications

Frequently Asked Questions

How does the PSB CS810 compare to the CS850?

Both speakers use an 8-inch woofer with a 3,100Hz LR4 crossover, the same 9¾-inch round cutout, 10–100 watt power range, and 8-ohm nominal impedance. Key differences: the CS850 has 1dB higher sensitivity (86dB vs 85dB anechoic), 3Hz deeper bass extension (45Hz vs 48Hz at ±3dB), and a lighter weight (3.25 lb vs 4.95 lb). The CS850 uses an indexed tweeter wave guide adjustment with individual EQ switches for both tweeter and woofer; the CS810 uses a ball-joint tweeter pivot with a single high-frequency level switch only. The CS810 uses a cast basket woofer and includes a high-temperature voice coil for sustained high-output applications. Both include round and square grilles. The CS850 is the higher-performing option; the CS810 is suited to whole-home audio applications where the high-temperature voice coil and cast basket construction are prioritized over the CS850's additional sensitivity and bass extension.

What is the ball-joint pivot mount on the CS810 tweeter?

The ball-joint pivot mount is a continuous adjustment mechanism that allows the tweeter assembly to be tilted in any direction within its angular range of motion — as opposed to an indexed adjustment that moves between discrete, locked positions. After inserting the CS810 through the ceiling cutout and before tightening the doglegs, the tweeter can be aimed toward the listening position by hand. Once the speaker is secured, the ball-joint friction holds the set position. The continuous adjustment provides fine angular resolution for aiming toward a listening position at any offset from directly below the speaker, without being constrained to the nearest indexed position. The trade-off is that there is no tactile click or position marker to confirm the set angle, unlike indexed adjustments that provide a positive lock at each detent.

What does the high-frequency level switch do?

The CS810's dual-position high-frequency level switch boosts or cuts the tweeter's output level relative to the woofer. This compensates for room-to-room variation in high-frequency acoustic conditions: a room with hard, reflective ceiling materials accumulates high-frequency energy that makes the speaker sound bright at the listening position, which the switch corrects by reducing tweeter level. Conversely, a room with heavy acoustic treatment that absorbs high frequencies may benefit from the boost position to restore treble presence. The switch is accessible from the front of the speaker after grille removal and requires no tools to adjust. Unlike the CS850, the CS810 provides only a tweeter level switch and does not include a separate woofer level adjustment switch.

What does "high-temperature voice coil" mean for whole-home audio?

A high-temperature voice coil uses a voice coil former and adhesives rated to withstand elevated operating temperatures without degrading — typically 155°C or higher for high-temperature voice coils versus 100–120°C for standard voice coils. In home theater installations, speakers are driven at high power for short periods during action scenes and then rest. In whole-home audio applications, background music plays continuously at moderate levels for many hours per day, and the voice coil accumulates heat over time rather than dissipating it between short high-output bursts. The high-temperature voice coil in the CS810 maintains its dimensional tolerances and adhesive bonds under these extended moderate-output thermal conditions, which is a practical reliability advantage for background music applications compared to a standard voice coil of equivalent rated power.

Does the CS810 use the same mounting hole as the CS850 and AIC 860?

Yes. The CS810 uses a 9¾-inch (245mm) round cutout — the same diameter as the CS850 and CS AIC 860. This means all three speakers can be installed in the same rough-in opening if a system upgrade or model change is made during or after construction. The CS810 requires 5 inches (127mm) of mounting depth, slightly more than the CS850's 4⅜ inches, so confirm ceiling cavity clearance with the deepest model being considered before cutting the rough-in opening. Both round (10⅝") and square (10¾") frameless grilles are included and fit the same 9¾-inch cutout.

Is the CS810 a good choice for a whole-home audio system?

Yes. The CS810's design prioritizes features relevant to whole-home audio installations: the high-temperature voice coil handles sustained moderate-level playback over long periods without thermal degradation, the 10–100 watt power range covers standard whole-home amplifier zone outputs, and the 8-ohm nominal impedance is compatible with standard multi-zone matrix amplifiers without impedance-related output current stress. The CS810's 85dB sensitivity is 1dB below the CS850, which has a negligible effect on background music volume levels in typical room sizes. The open-back design's ceiling cavity loading works well for residential rooms where ceiling cavity volume and insulation are reasonably consistent between speaker positions.

Where to buy PSB CS810 in-ceiling speakers in Buffalo NY?

The PSB CS810 is available from Vinyl Sound, an authorized PSB Speakers dealer in Buffalo, New York. Vinyl Sound also carries the CS850 and CS AIC 860 in-ceiling speakers for side-by-side comparison across PSB's in-ceiling range. Free shipping is available across the continental United States. Contact Vinyl Sound Buffalo by phone or email to purchase the CS810 or discuss which PSB in-ceiling speaker best fits your installation depth, sensitivity, and application requirements.