{"product_id":"psb-csir-sub-slim-in-room-subwoofer","title":"PSB CSIR SUB Slim In-Room Subwoofer","description":"\u003ch2\u003ePSB CSIR SUB In-Room Subwoofer at Vinyl Sound Buffalo NY\u003c\/h2\u003e\n\u003cp\u003eThe PSB CSIR SUB is a passive 10-inch in-room subwoofer built around a glass fiber and PMI foam sandwich cone driver with die cast basket, rubber surround, and Balanced Drive motor structure, housed in a slim MDF cabinet measuring 15¾ inches wide by 17 inches tall by 5¼ inches deep. Available at Vinyl Sound in Buffalo, New York, the CSIR SUB is a room-placement passive subwoofer — it sits in or against the room rather than fitting inside a wall — and includes both a wall mounting bracket and a floor stand for flexible positioning. IsoAcoustics isolators are built into the CSIR SUB, decoupling the cabinet from the floor or wall surface it rests against to prevent bass energy from coupling into the room structure. The frequency response extends from 25Hz to 150Hz (±3dB) with a -10dB cutoff at 20Hz — very deep bass extension from a cabinet only 5¼ inches deep. Sensitivity is 88dB anechoic into a nominal 8-ohm load. Recommended amplifier power is 40–200 watts. The CSIR SUB is designed to pair with the PSB CS 500W architectural subwoofer amplifier, which includes a predefined DSP EQ profile calibrated for the CSIR SUB enclosure. Satin Black and Satin White finishes allow the CSIR SUB to blend into residential or commercial room decor. The acoustic transparent cloth grille on a wood frame provides a finished appearance consistent with quality audio furniture. The CSIR SUB is part of Vinyl Sound Buffalo's full \u003ca href=\"https:\/\/vinylsound.com\/collections\/speakers\"\u003espeaker collection\u003c\/a\u003e, which includes in-room subwoofers, in-wall subwoofer systems, on-wall speakers, and amplification from leading audio brands.\u003c\/p\u003e\n\n\u003ch2\u003e10-Inch PMI Sandwich Cone, IsoAcoustics Isolators, and Balanced Drive Motor\u003c\/h2\u003e\n\u003cp\u003eThe CSIR SUB's 10-inch driver uses the same glass fiber and PMI foam sandwich cone construction found in PSB's CSIW SUB10 in-wall subwoofer. The sandwich cone pairs thin glass fiber skins with a PMI (Polymethacrylimide) rigid foam core, producing a diaphragm that is significantly stiffer than solid polypropylene or standard fiberglass cones of the same mass. For a high-excursion subwoofer driver that must move large volumes of air to produce deep bass at 20Hz, cone stiffness controls the breakup resonances that occur when the cone flexes unevenly at high excursion values and introduces harmonic distortion into the bass output. The Balanced Drive motor structure generates symmetrical electromagnetic force on the voice coil through the driver's full excursion range in both forward and backward directions, minimizing the second-harmonic distortion that asymmetric motor force produces at high output levels. The die cast basket provides a rigid, precision-machined chassis that maintains voice coil-to-gap alignment at large excursion values where a stamped steel basket would flex under the mechanical loads. IsoAcoustics isolators are incorporated into the CSIR SUB's mounting points — whether on the floor stand or the wall bracket — and physically decouple the MDF cabinet from the contact surface using geometrically shaped elastic elements that absorb and dissipate bass energy at the cabinet-to-surface interface rather than transmitting it into the floor or wall structure.\u003c\/p\u003e\n\n\u003ch2\u003eWall Bracket, Floor Stand, IsoAcoustics Isolation, and CS 500W Integration\u003c\/h2\u003e\n\u003cp\u003eThe CSIR SUB includes both a wall mounting bracket and a floor stand, and PSB describes three placement options: wall-mounted via the included bracket, floor-standing via the floor stand, or placed behind or under furniture such as a sofa or cabinet where it remains out of sight. In all three placements, the IsoAcoustics isolators between the CSIR SUB cabinet and its mounting surface prevent bass vibrations from coupling mechanically into the wall, floor, or furniture structure — a source of secondary resonance that colors bass output and can transmit low-frequency energy into adjacent rooms through the building structure. The CSIR SUB pairs with the PSB CS 500W amplifier, which at 8-ohm load delivers 250 watts RMS — slightly above the CSIR SUB's 40–200 watt recommended power range. PSB explicitly designates the CS 500W as the companion amplifier for the CSIR SUB; the CS 500W's built-in limiter circuit and predefined CSIR SUB DSP EQ profile work together to keep the subwoofer operating within its design parameters even when the amplifier's rated output exceeds the recommended power ceiling. The EQ profile calibrates the frequency response for the CSIR SUB enclosure's dimensional constraints, and the limiter prevents excursion overload at the output levels the 250-watt amplifier section could otherwise deliver.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eFrequency Response (±3dB)\u003c\/th\u003e\n\u003ctd\u003e25Hz – 150Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLF Cutoff (-10dB)\u003c\/th\u003e\n\u003ctd\u003e20Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSensitivity (Anechoic)\u003c\/th\u003e\n\u003ctd\u003e88dB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eSensitivity (Listening Room)\u003c\/th\u003e\n\u003ctd\u003e90dB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eImpedance Nominal\u003c\/th\u003e\n\u003ctd\u003e8 Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eRecommended Power\u003c\/th\u003e\n\u003ctd\u003e40–200 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWoofer\u003c\/th\u003e\n\u003ctd\u003e10\" (254mm) Glass Fiber \/ PMI Foam Sandwich Cone, Die Cast Basket, Rubber Surround, Balanced Drive Motor Structure\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eIsolation\u003c\/th\u003e\n\u003ctd\u003eIsoAcoustics Isolators (Included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCabinet\u003c\/th\u003e\n\u003ctd\u003eMDF\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eGrille\u003c\/th\u003e\n\u003ctd\u003eAcoustic Transparent Cloth, Wood Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eNet Width\u003c\/th\u003e\n\u003ctd\u003e15¾\" (400mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eNet Height\u003c\/th\u003e\n\u003ctd\u003e17\" (432mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eNet Depth\u003c\/th\u003e\n\u003ctd\u003e5¼\" (133mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e24⅘ lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e32½ lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eAvailable Finishes\u003c\/th\u003e\n\u003ctd\u003eSatin Black, Satin White\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eWall Bracket Included, Floor Stand Included\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCompatible Amplifier\u003c\/th\u003e\n\u003ctd\u003ePSB CS 500W (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat are IsoAcoustics isolators and why does the CSIR SUB include them?\u003c\/h3\u003e\n\u003cp\u003eIsoAcoustics is a Canadian audio accessory company whose isolation products have become a reference standard for decoupling speakers from the surfaces they rest on. IsoAcoustics isolators are elastic geometric elements — typically cylindrical or disc-shaped — positioned between a speaker cabinet and its contact surface (floor, shelf, wall bracket, stand). They work by absorbing and dissipating the vibration energy transmitted from the speaker cabinet into the contact surface, rather than allowing it to pass through rigidly. When a subwoofer vibrates against a floor or wall surface, that vibration couples mechanically into the building structure and can cause secondary resonances — the floor itself begins to radiate bass energy, adding coloration — and can transmit low-frequency energy through the building frame into adjacent rooms. IsoAcoustics isolators interrupt this coupling path at the point of contact. In the CSIR SUB, PSB integrates IsoAcoustics technology into the floor stand and wall bracket mounting points, ensuring that the subwoofer remains isolated from its contact surface regardless of whether it is placed on the floor, mounted on the wall, or positioned under furniture.\u003c\/p\u003e\n\n\u003ch3\u003eWhat placement options does the CSIR SUB support?\u003c\/h3\u003e\n\u003cp\u003eThe CSIR SUB supports three placement configurations, all included in the box. First, wall mounting via the included bracket: the subwoofer mounts flush against the wall surface at any height, with the IsoAcoustics isolators in the bracket decoupling the cabinet from the wall. This eliminates the floor footprint entirely and positions the subwoofer at any wall location suited to the room's bass response. Second, floor standing via the included stand: the subwoofer sits on the floor on the floor stand, with IsoAcoustics isolators between the cabinet and the stand preventing bass coupling into the floor. Third, concealed placement: the CSIR SUB's 5¼-inch depth and compact 15¾ × 17-inch footprint allow it to be placed behind a sofa, inside an entertainment unit with an open back, or under a raised cabinet where it is acoustically present but visually hidden. The placement flexibility is a practical advantage over conventional subwoofers, which typically require a specific floor position and cannot be wall-mounted.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the CSIR SUB pair with the CS 500W amplifier?\u003c\/h3\u003e\n\u003cp\u003eThe CS 500W subwoofer amplifier includes a predefined DSP EQ profile calibrated for the CSIR SUB enclosure. When the installer selects the CSIR SUB profile in the CS 500W's DSP menu, the amplifier applies a frequency response correction curve designed for the CSIR SUB's enclosure volume, driver parameters, and cabinet depth. This correction extends and flattens the subwoofer's bass response below its natural rolloff point, allowing the CSIR SUB to achieve its 20Hz (-10dB) extension despite its 5¼-inch depth. The CS 500W delivers 250 watts RMS at 8 ohms — slightly above the CSIR SUB's 40–200 watt recommended range. The CS 500W's built-in limiter circuit monitors output and prevents the amplifier from exceeding the driver's safe excursion limits, even at the 250-watt output level. PSB designates the CS 500W as the companion amplifier for the CSIR SUB, and the predefined profile plus limiter are specifically tuned to protect the driver while maximizing the subwoofer's performance envelope.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does \"Balanced Drive motor structure\" mean in a passive in-room subwoofer?\u003c\/h3\u003e\n\u003cp\u003eThe Balanced Drive motor refers to the electromagnetic motor assembly that drives the 10-inch woofer cone back and forth in response to the audio signal. A standard single-magnet motor generates force on the voice coil that decreases as the coil moves to the extremes of its travel and begins to exit the uniform magnetic field region of the gap. This force variation is asymmetric — the coil exits the gap differently in the forward and backward directions due to manufacturing tolerances and magnet geometry — and asymmetric force generates second-harmonic distortion: a bass coloration that adds an unwanted harmonic at twice the fundamental frequency of the signal being played. The Balanced Drive motor structure addresses this by designing the motor geometry to produce equal, symmetric force on the voice coil throughout its full travel range in both directions. For a subwoofer producing low frequencies at high output levels — where the cone excursion is large and motor asymmetry is most pronounced — the Balanced Drive motor reduces the second-harmonic distortion that would otherwise add audible coloration to bass guitar, kick drum, and low-frequency effects channel output.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the CSIR SUB differ from the CSIW SUB10 in-wall model?\u003c\/h3\u003e\n\u003cp\u003eThe CSIR SUB and CSIW SUB10 share the same 10-inch glass fiber \/ PMI foam sandwich cone driver format, Balanced Drive motor structure, and CS 500W compatibility, but they differ in installation method, cabinet design, and application. The CSIW SUB10 is installed inside a wall — it is a new construction in-wall model that mounts to stud beams before drywall, is completely hidden after installation, and uses rubber-isolated mounting brackets to decouple the cabinet from the wall structure. Its cabinet depth is 3⅞ inches and frequency response is 25Hz to 150Hz (±3dB). The CSIR SUB is a room-placement subwoofer — it sits in the room on a floor stand, mounts on the wall surface via a bracket, or is placed behind furniture — and uses IsoAcoustics isolators at its mounting contacts for the same decoupling function as the CSIW SUB10's rubber brackets. The CSIR SUB extends bass slightly deeper to 20Hz (-10dB) compared to the CSIW SUB10, and its 5¼-inch depth and cloth grille give it a finished appearance suited to visible room installation. Choose the CSIW SUB10 when hiding the subwoofer entirely in the wall is the priority; choose the CSIR SUB when room placement flexibility and visible in-room installation are preferred.\u003c\/p\u003e\n\n\u003ch3\u003eCan the CSIR SUB be used with amplifiers other than the CS 500W?\u003c\/h3\u003e\n\u003cp\u003eYes. The CSIR SUB is a standard 8-ohm passive subwoofer enclosure that accepts a speaker-level connection from any amplifier rated for 8-ohm loads and within the 40–200 watt recommended power range. An AV receiver with a dedicated subwoofer amplifier channel capable of speaker-level output, a separate subwoofer amplifier plate, or a two-channel amplifier bridged to mono can all drive the CSIR SUB without requiring the CS 500W. The advantage of the CS 500W is the predefined CSIR SUB DSP EQ profile — when using the CS 500W with the CSIR SUB profile, the amplifier applies PSB-calibrated equalization specific to this enclosure's design, which extends and optimizes the bass response without requiring manual EQ adjustment or a separate room correction system. Using the CSIR SUB with a generic amplifier or receiver produces functional results but requires the user to apply their own bass equalization to optimize the response. The CS 500W is the simplest path to calibrated, optimized performance from the CSIR SUB.\u003c\/p\u003e\n\n\u003ch3\u003eWhere to buy the PSB CSIR SUB in-room subwoofer in Buffalo NY?\u003c\/h3\u003e\n\u003cp\u003eThe PSB CSIR SUB is available from Vinyl Sound, an authorized PSB dealer in Buffalo, New York. Vinyl Sound also carries the PSB CS 500W subwoofer amplifier — the recommended pairing for the CSIR SUB — as well as the CSIW SUB10 and CSIW SUB28 in-wall subwoofer models for customers who prefer a hidden in-wall installation. Free shipping is available across the continental United States. Contact Vinyl Sound Buffalo by phone or email to purchase the CSIR SUB, pair it with the CS 500W, or compare in-room versus in-wall subwoofer options for your installation.\u003c\/p\u003e","brand":"PSB Speakers","offers":[{"title":"Black","offer_id":53576088813875,"sku":null,"price":1599.0,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":53576088846643,"sku":null,"price":1599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/0293\/0739\/files\/psb_csir_sub_-_black.png?v=1782796904","url":"https:\/\/vinylsound.com\/products\/psb-csir-sub-slim-in-room-subwoofer","provider":"Vinyl Sound USA","version":"1.0","type":"link"}