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DAMAGED SUNFIRE XTEQ8 SUBWOOFER #485

End: 15.05. 2024 14:12:08 on Wednesday
  • Condition: For parts or not working
  • Price: 230.23 EUR FESTPREIS
  • Status: sold
  • Item number: 226066980283
  • Seller: mr.tubedude (552|99.0%)
  • Seller information: Commercial (with base shop)
  • Item location: Hampden, Massachusetts USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY

DAMAGED SUNFIRE XTEQ8 SUBWOOFER #484

End: 25.04. 2024 15:29:01 on Thursday
  • Condition: For parts or not working
  • Price: 326.71 EUR FESTPREIS
  • Status: sold
  • Item number: 226062800879
  • Seller: mr.tubedude (532|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: Hampden, Massachusetts USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY

DAMAGED SUNFIRE XTEQ8 SUBWOOFER #486

End: 17.04. 2024 23:10:10 on Wednesday
  • Condition: For parts or not working
  • Price: 351.12 EUR FESTPREIS
  • Status: sold
  • Item number: 226066980813
  • Seller: mr.tubedude (533|98.9%)
  • Seller information: Commercial (with base shop)
  • Item location: Hampden, Massachusetts USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY

Carver Sunfire XT CRM-2 Ribbon Speakers 400W ~High End~ No Box

End: 16.04. 2024 19:16:13 on Tuesday
  • Condition: Used
  • Price: 564.1 EUR Auktion
  • Status: sold
  • Item number: 285806226140
  • Bids: 1
  • Seller: heatherfitz (446|100.0%)
  • Seller information: non commercial
  • Item location: Edison, New Jersey USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY

Sunfire Atmos XT Series XTATM265 Powered Subwoofer (Black) Excellent n353

End: 23.03. 2024 12:32:57 on Saturday
  • Condition: Used
  • Price: 438.61 EUR FESTPREIS
  • Status: sold
  • Item number: 176276961639
  • Seller: broomstick6 (19018|99.5%)
  • Seller information: Commercial (with base shop)
  • Item location: Scottsdale, Arizona USA
  • Ships to: Worldwide
  • Shipping: 27,0 EUR
  • on EBAY

Sunfire Cinema Ribbon CRM-2C Center Speaker XT Series Rosewood

End: 16.03. 2024 20:42:07 on Saturday
  • Condition: Used
  • Price: 371.04 EUR FESTPREIS
  • Status: unsold
  • Item number: 226039536893
  • Seller: arnous_vfbgmgi6m (14|100.0%)
  • Seller information: non commercial
  • Item location: Paia, Hawaii USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY

Sunfire Subwoofer XTEQ8

End: 16.03. 2024 16:29:03 on Saturday
  • Condition: New: Other
  • Price: 550.15 EUR Auktion
  • Status: sold
  • Item number: 196285671681
  • Bids: 1
  • Seller: davius.alpy2uy (425|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY

Sunfire Subwoofer XTEQ8

End: 09.03. 2024 18:19:20 on Saturday
  • Condition: New: Other
  • Price: 546.53 EUR Auktion
  • Status: unsold
  • Item number: 196273903242
  • Bids: 0
  • Seller: davius.alpy2uy (425|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY

Sunfire ATMOS Subwoofer XTATM265 

End: 04.03. 2024 00:30:01 on Monday
  • Condition: Used
  • Price: 244.57 EUR Auktion
  • Status: sold
  • Item number: 156082322439
  • Bids: 19
  • Seller: 2210aaronm (799|100.0%)
  • Seller information: non commercial
  • Item location: New London, Wisconsin USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Sunfire ATMOS Subwoofer XTATM265 Comes with power cable and measurement microphone! Condition is Used. Shipped with USPS Ground Advantage.

Sunfire ATMOS Subwoofer XTATM265

End: 27.02. 2024 17:50:53 on Tuesday
  • Condition: Used
  • Price: 549.07 EUR FESTPREIS
  • Status: sold
  • Item number: 166596041551
  • Seller: 112815 (137|100.0%)
  • Seller information: non commercial
  • Item location: Minneapolis, Minnesota USA
  • Ships to: US
  • Shipping: 95,0 EUR
  • on EBAY
  • Description

    I have 1 Sunfire ATMOS Subwoofer XTATM265 this is an amazing little subwoofer that doesn’t know its little! I have the original box that it will be shipped in. I also have the microphone that I will include in the sale for the buyer of the subwoofer. If you have any questions please ask. Willing to sell it locally with no shipping for less. I will only ship to the lower 48 not Alaska or Hawaii I will not ship to a P.O. Box. Thank you!

Sunfire Subwoofer XTEQ8

End: 24.02. 2024 18:18:46 on Saturday
  • Condition: New: Other
  • Price: 552.0 EUR Auktion
  • Status: unsold
  • Item number: 196250186752
  • Bids: 0
  • Seller: davius.alpy2uy (425|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    I purchased this subwoofer a few years ago but never installed it. The box was opened but nothing was removed. The item essentially brand new. This subwoofer was a little over $2,000 when it was able to be purchased new. Happy bidding

Sunfire ATMOS Subwoofer XTATM265 

End: 19.02. 2024 00:59:01 on Monday
  • Condition: Used
  • Price: 335.96 EUR Auktion
  • Status: sold
  • Item number: 156057526858
  • Bids: 35
  • Seller: 2210aaronm (798|100.0%)
  • Seller information: non commercial
  • Item location: New London, Wisconsin USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Sunfire ATMOS Subwoofer XTATM265 Comes with power cable and measurement microphone! Condition is Used. Shipped with USPS Ground Advantage.

Sunfire Subwoofer XTEQ8

End: 17.02. 2024 18:17:51 on Saturday
  • Condition: New: Other
  • Price: 574.66 EUR Auktion
  • Status: unsold
  • Item number: 196237126125
  • Bids: 0
  • Seller: davius.alpy2uy (425|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    I purchased this subwoofer a few years ago but never installed it. The box was opened but nothing was removed. The item essentially brand new. This subwoofer was a little over $2,000 when it was able to be purchased new. Happy bidding

Sunfire Cinema Ribbon CRS-3 XT Series

End: 12.02. 2024 18:31:34 on Monday
  • Condition: Used
  • Price: 410.58 EUR FESTPREIS
  • Status: sold
  • Item number: 404793767430
  • Seller: du-9484 (11|100.0%)
  • Seller information: non commercial
  • Item location: Porter Ranch, California USA
  • Ships to: US
  • Shipping: 65,0 EUR
  • on EBAY
  • Description

    Sunfire XT series CRS-3 speaker / Pair. Rosewood

Sunfire ATMOS Subwoofer XTATM265

End: 12.02. 2024 05:53:24 on Monday
  • Condition: Used
  • Price: 438.41 EUR FESTPREIS
  • Status: sold
  • Item number: 166572036508
  • Seller: 112815 (137|100.0%)
  • Seller information: non commercial
  • Item location: Minneapolis, Minnesota USA
  • Ships to: US
  • Shipping: 95,0 EUR
  • on EBAY
  • Description

    I have 1 Sunfire ATMOS Subwoofer XTATM265 this is an amazing little subwoofer that doesn’t know its little! I have the original box that it will be shipped in. I also have the microphone that I can sell the buyer of the subwoofer, free shipping with this purchase. If you have any questions please ask. Willing to sell it locally with no shipping for less.

Sunfire Subwoofer XTEQ8

End: 03.02. 2024 18:17:19 on Saturday
  • Condition: New: Other
  • Price: 647.1 EUR Auktion
  • Status: unsold
  • Item number: 196213373693
  • Bids: 0
  • Seller: davius.alpy2uy (424|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    I purchased this subwoofer a few years ago but never installed it. The box was opened but nothing was removed. The item essentially brand new. This subwoofer was a little over $2,000 when it was able to be purchased new. Happy bidding

Sunfire ATMOS Subwoofer XTATM265

End: 28.01. 2024 22:08:41 on Sunday
  • Condition: Used
  • Price: 465.38 EUR FESTPREIS
  • Status: unsold
  • Item number: 166538885355
  • Seller: 112815 (137|100.0%)
  • Seller information: non commercial
  • Item location: Minneapolis, Minnesota USA
  • Ships to: US
  • Shipping: 95,0 EUR
  • on EBAY
  • Description

    I have 1 Sunfire ATMOS Subwoofer XTATM265 this is an amazing little subwoofer that doesn’t know its little! I have the original box that it will be shipped in. I also have the microphone that I can sell the buyer of the subwoofer, free shipping with this purchase. If you have any questions please ask. Willing to sell it locally with no shipping for less.

Sunfire Subwoofer XTEQ8

End: 20.01. 2024 18:16:51 on Saturday
  • Condition: New: Other
  • Price: 643.5 EUR Auktion
  • Status: unsold
  • Item number: 196187804879
  • Bids: 0
  • Seller: davius.alpy2uy (424|100.0%)
  • Seller information: non commercial
  • Item location: Lascassas, Tennessee USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    I purchased this subwoofer a few years ago but never installed it. The box was opened but nothing was removed. The item essentially brand new. This subwoofer was a little over $2,000 when it was able to be purchased new. Happy bidding

Sunfire Brand XTEQ 8 Model Powered Subwoofer w/ Power Cable

End: 11.01. 2024 02:45:37 on Thursday
  • Condition: Used
  • Price: 168.47 EUR Auktion
  • Status: sold
  • Item number: 166533776346
  • Bids: 25
  • Seller: goodwillrs (237458|99.6%)
  • Seller information: Commercial (with base shop)
  • Item location: Racine, Wisconsin USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    Sunfire Brand XTEQ 8 Model Powered Subwoofer w/ Power Cable Condition: Used The item appears to be functional and is being sold in AS IS condition (the system was plugged in and powered on with the included power cable, lit up, and began to vibrate and hum). The system was not tested any further. Weight: 44.00 This is a pre-owned item being sold AS IS. Unless noted, electronic/electrical/mechanical items are NOT tested for functionality and should be considered in for parts and repair condition. We describe each item to the best of our ability; however, we are NOT experts in any field. All measurements are approximated. Items may show wear consistent with usage and age, such as: discoloration, scratches, scuffs, dents, cracks, chips, holes, loose threads and stitches, edge and corner wear, box wear, oxidation, dirt; dust, other residue, owner-added markings, and signs of repair such as tape and glue. Lot items may not contain all original parts or accessories and may have been outfitted with replacement pieces and/or modifications by previous owners. Items and autographs without certificates or markers of authenticity cannot be guaranteed authentic. While we do our best to identify and discard fakes, we are not experts. Any certificates and markers of authenticity referenced in this listing are assertions of authenticity by the manufacturer, production company, or a third party, and not a guarantee of authenticity by Goodwill. Unless noted, collectibles such as coins, comics, and trading cards are ungraded. If you have any questions regarding this item, please contact us PRIOR to bidding. Bulk lots such as trading cards, sports cards, LEGOs, and more are not returnable.

Sunfire ATMOS Subwoofer XTATM265 

End: 21.12. 2023 16:13:15 on Thursday
  • Condition: Used
  • Price: 431.32 EUR FESTPREIS
  • Status: unsold
  • Item number: 155655653386
  • Seller: bayougoldllc (7817|97.2%)
  • Seller information: Commercial (with base shop)
  • Item location: Baton Rouge, Louisiana USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    tested used as shown.

Sunfire XT Series 7.1 Theater Speaker System

End: 10.12. 2023 22:30:57 on Sunday
  • Condition: Used
  • Price: 4607.66 EUR Auktion
  • Status: sold
  • Item number: 285590780588
  • Bids: 1
  • Seller: bwestlakecdi (67|80.0%)
  • Seller information: non commercial
  • Item location: Chesterfield, Missouri USA
  • Ships to: None
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    This system consists of: 6 CRS-3 (Left Front, Right Front, Left Surround, Right Surround, Left Back, Right Back) Speakers1 CRS-3C (Center Channel) Speaker1 TS-EQ12 Subwoofer One pair of the speakers has never been opened. The other speakers were used to demo the system in our showroom by appointment only so they were only used occasionally. There are a few scratches on a couple of the cabinets from handling but they mostly look like new. Sunfire CRS-3 and CRS-3CLow frequencies are handled by three 4.5 High Back-emf woofers (four on the CRM-2C) that are based on Sunfires subwoofers. The CRS-3 handles up to 450 watts of power. The CRS-3 boasts a sensitivity rating of 90dB and a nominal impedance of 6 ohms. The CRS-3C center channel speaker utilizes the same 4.5 High Back-emf drivers in a 2-½ way tapered array and 6 ribbon as the CRS-3. The CRS-3 and CRS-3C are both finished in hand-rubbed ebonized rosewood. Both models also feature a boundary compensation switch that allows the user to tailor the sound for the specific room or placement. Key Cinema Ribbon Trio Features: Three 4.5 high back-emf drivers for astonishing bass (four on the CRM-3C) 6 High efficiency ribbon delivers amazing detail and lifelike imaging Boundary compensation switch for flexible placement Hand Polished, Ebonized Rosewood Finish Product Weight15Depth (in.)4.1Width (in.)7.9Height (in.)23.1Impedance8 ohmsRms Power Handling400Woofer Size4.5Maximum Power Handling (Watts)400 Sunfire TS-EQ12 SubwooferSpeci?cations (Signature Edition)Ampli?er Output: 2,700 watts rms (3.3 ? impedance)High Cut Filter: 30 Hz - 100 Hz adjustable, with a Bypass position.Frequency Response: 16 Hz - 100 HzPower Line VoltageUS model 120 VAC 50/60 HzDimensions: 13 x 13 x 13Weight: 53 lbsFinish: High gloss, dark rosewood ?nish (also referred to as Deep Bing Cherry Lacquer).Line Power Consumption:800 watts average, at maximum continuous output. 8 watts at idle. 2,700 watts peak, time limited basisOutput Levels: Greater than 116 dB peak SPL (includes room gain) from 16 Hz to 100 Hz. Measurement is one meter, anechoic.A typical Sun?re subwoofer can be expected to ‘best’ its speci?ed minimum peak SPL by several decibels.Total Harmonic Distortion: Typically less than 1/10 of the fundamental between 18 to 80 Hz.Input Sensitivity (full output): 250 mVrms from left input with volume control at 0 dB, 60 mVrms volume control fully clockwise *0.75 Vrms from right input with volume control at 0 dB, 200 mVrms volume control fully clockwise *Input Impedance:30 k? for Line-Level inputs56 k? for Hi-Level inputs40 k? for XLR input, each leg balanced to groundXLR InputPin 1 GroundPin 2 Positive Pin 3 NegativeDriver: 12 inchExtra large magnet and long throw mechanical design yield very high back-emf. The result is extraordinarily high operating ef?ciency - that is, more acoustic output for each watt of input.Internal System Gain:50 dB from left input jack to speaker with volume control at 0 dB, 62 dB with control fully clockwise * 40 dB from right input jack to speaker with volume control at 0 dB, 52 dB with control fully clockwise * * TheSun?re True Subwoofer utilizes differential gain on the left and right inputs to retain both L+R and L-R information.12 VDC Trigger InputInput voltage range: 5 -18 VDC Impedance: approx 600 ? (20 mA @ 12 V) Removable terminal block, and one 1/8” Mono minijack, tip positive.

SunFire XT Cinema Ribbon CRS-3C-3 Center 440 Watts-rosewood Excellent- W/Bracket

End: 01.11. 2023 05:18:48 on Wednesday
  • Condition: Used
  • Price: 372.39 EUR Auktion
  • Status: sold
  • Item number: 256269238379
  • Bids: 8
  • Seller: brown_shena (119|100.0%)
  • Seller information: non commercial
  • Item location: Avon Park, Florida USA
  • Ships to: US
  • Shipping: EUR
  • on EBAY
  • Description

    This speaker has been used very little .. is in excellent condition.. ( two of the dust covers have a small dent in them which does not affect the sound and probably would be an easy fix for someone qualified).. beautiful glossy rosewood finish.. includes mounting bracket.. has been kept in climate controlled storage for several years.. bought and used for 6 months while my main theater was being built... my main theater consists of all M&k S-150Thx .. the Sunfire is very good competition and for music beats the M&K.. many prefer the Sunfire for theater as well .. but, I lean towards M&K ..and I do have a separate music room .. I fought off selling this ( along with my other sunfire speakers) for years.. but, time to let go of all the extra audio equipment.. Im tired of moving them around.. this comes from a smoke and cat free environment.. . Speakers have always been properly equipped with proper power needs ( Sunfire Grand Cinema ,Krell , Harman Kardon Citation 7.1 , Parasound , amplifiers ) as well as a Marantz sr7010 ( used as a preamp ).. recently tested using a Marantz 8805A.. never pushed to near capacity ..Includes speaker and wall bracket.. The grill is in perfect shape.. Will be packed very well .. will not ship to a P.O. Box ... Will only ship to the Continental United States.. will only ship to the address provided by eBay.. here is the AI description provided by eBay ~~CRS-3C-3 Center Speaker is a powerhouse with 440 watts of RMS power. Its cinema ribbon technology delivers crystal clear sound for an immersive experience. The speaker is wired and comes with a bracket for easy installation. The rosewood finish adds a touch of elegance to any home audio setup. This speaker is a great addition for those who want top-notch sound quality.thank you very much.. feel free to message me with any questions..and if youd like more pictures.. hopefully better ones.. having a hard time with getting enough light to really get the beauty of this speaker... It is a beast as well !

Sunfire XT Series 7.1 Theater Speaker System

End: 30.10. 2023 13:47:51 on Monday
  • Condition: Used
  • Price: 4526.32 EUR Auktion
  • Status: unsold
  • Item number: 285528446326
  • Bids: 0
  • Seller: bwestlakecdi (68|100.0%)
  • Seller information: non commercial
  • Item location: Chesterfield, Missouri USA
  • Ships to: None
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    This system consists of: 6 CRS-3 (Left Front, Right Front, Left Surround, Right Surround, Left Back, Right Back) Speakers1 CRS-3C (Center Channel) Speaker1 TS-EQ12 Subwoofer One pair of the speakers has never been opened. The other speakers were used to demo the system in our showroom by appointment only so they were only used occasionally. There are a few scratches on a couple of the cabinets from handling but they mostly look like new. Sunfire CRS-3 and CRS-3CLow frequencies are handled by three 4.5 High Back-emf woofers (four on the CRM-2C) that are based on Sunfires subwoofers. The CRS-3 handles up to 450 watts of power. The CRS-3 boasts a sensitivity rating of 90dB and a nominal impedance of 6 ohms. The CRS-3C center channel speaker utilizes the same 4.5 High Back-emf drivers in a 2-½ way tapered array and 6 ribbon as the CRS-3. The CRS-3 and CRS-3C are both finished in hand-rubbed ebonized rosewood. Both models also feature a boundary compensation switch that allows the user to tailor the sound for the specific room or placement. Key Cinema Ribbon Trio Features: Three 4.5 high back-emf drivers for astonishing bass (four on the CRM-3C) 6 High efficiency ribbon delivers amazing detail and lifelike imaging Boundary compensation switch for flexible placement Hand Polished, Ebonized Rosewood Finish Product Weight15Depth (in.)4.1Width (in.)7.9Height (in.)23.1Impedance8 ohmsRms Power Handling400Woofer Size4.5Maximum Power Handling (Watts)400 Sunfire TS-EQ12 SubwooferSpeci?cations (Signature Edition)Ampli?er Output: 2,700 watts rms (3.3 ? impedance)High Cut Filter: 30 Hz - 100 Hz adjustable, with a Bypass position.Frequency Response: 16 Hz - 100 HzPower Line VoltageUS model 120 VAC 50/60 HzDimensions: 13 x 13 x 13Weight: 53 lbsFinish: High gloss, dark rosewood ?nish (also referred to as Deep Bing Cherry Lacquer).Line Power Consumption:800 watts average, at maximum continuous output. 8 watts at idle. 2,700 watts peak, time limited basisOutput Levels: Greater than 116 dB peak SPL (includes room gain) from 16 Hz to 100 Hz. Measurement is one meter, anechoic.A typical Sun?re subwoofer can be expected to ‘best’ its speci?ed minimum peak SPL by several decibels.Total Harmonic Distortion: Typically less than 1/10 of the fundamental between 18 to 80 Hz.Input Sensitivity (full output): 250 mVrms from left input with volume control at 0 dB, 60 mVrms volume control fully clockwise *0.75 Vrms from right input with volume control at 0 dB, 200 mVrms volume control fully clockwise *Input Impedance:30 k? for Line-Level inputs56 k? for Hi-Level inputs40 k? for XLR input, each leg balanced to groundXLR InputPin 1 GroundPin 2 Positive Pin 3 NegativeDriver: 12 inchExtra large magnet and long throw mechanical design yield very high back-emf. The result is extraordinarily high operating ef?ciency - that is, more acoustic output for each watt of input.Internal System Gain:50 dB from left input jack to speaker with volume control at 0 dB, 62 dB with control fully clockwise * 40 dB from right input jack to speaker with volume control at 0 dB, 52 dB with control fully clockwise * * TheSun?re True Subwoofer utilizes differential gain on the left and right inputs to retain both L+R and L-R information.12 VDC Trigger InputInput voltage range: 5 -18 VDC Impedance: approx 600 ? (20 mA @ 12 V) Removable terminal block, and one 1/8” Mono minijack, tip positive.

Sunfire ATMOS Subwoofer XTATM265  In Excellent Condition 1400 watts.. . Nice!

End: 30.10. 2023 04:33:15 on Monday
  • Condition: Used
  • Price: 181.04 EUR Auktion
  • Status: unsold
  • Item number: 256267626298
  • Bids: 0
  • Seller: brown_shena (118|100.0%)
  • Seller information: non commercial
  • Item location: Avon Park, Florida USA
  • Ships to: US
  • Shipping: 0,0 EUR
  • on EBAY
  • Description

    This subwoofer is extremely powerful.. especially for its size.. has not been used much and when used volume was never more than half.. . It works best with a trigger switch ( cable included).. otherwise you have to wake it up with a jolt of volume.. I just ran 12v trigger cable from my Marantz 8805A to sunfire and it worked great.. it really is incredible that this can put out the power it.does... absolutely zero issues.. never used as a sole subwoofer.. only used while my new theater room was being built and space Was limited.. decided to keep and put in storage for several years.. but time to unload a lot of my home theater retiries .. always very well taken care of .. comes from smoke and cat free environment.. I will not mail outside of the Continental United States.. I will not Mail to a P..O. box. .. will only mail to the address provided by eBay .. please do not send offers.. I will ignore your message..this will be for sale on other sites.. so it may be pulled at any time.. It will be very well packed ! Includes subwoofer ,power cable and 12v trigger cable .. Here is the AI description ~~ The Sunfire ATMOS Subwoofer XTATM265 is a powerful addition to any home audio system. With a driver size of 8 inches and an RMS power of 1400 watts, it produces deep, rich bass that will enhance any music or movie experience. The subwoofer is in excellent condition and has been used very little. Its cube shape and wired connectivity make it easy to integrate into any home audio setup. The stereo L/R RCA audio inputs ensure compatibility with a wide range of devices. This is a great opportunity to add a high-quality subwoofer to your system.