This is listed as a speaker system. How many speakers are included?

One speaker only. You may consider it a system as they are active. They have a Class D amplifier and a DSP built in.

Can I use this for my home stereo, in 14’ by 25’ living room

This is designed more for a 140' by 250' living room.... I'm guessing that, if you have 2 grand to spend on a sub, and have to ask this question... Return the stolen money.

I am planning to buy a sound system for 1000 people venues or a little more mostly out door. What would you guys recomend me tu buy and quantities?

Buy 4 of these, 2 per side and 2 or 4 subs. I would say 4 subs.

What cables (short) are needed connect my phone's audio out to srx835p? should modify anything when providing unbalanced mono input from phone?

First I will say the speakers are killer and destroy they can go so loud perfect for my outside venue. I run mine off of a mixer board (they are not expensive) so I have a Blootooth reciever into the board going into the speakers. I have not tried it but on other speakers like this I simply used a 3.5mm output from my phone with a 3.5mm TRS to two 6.35 mm TRS plugs that go into the speakers. search for example on amazon "UGREEN 3.5mm 1/8" TRS to Dual 6.35mm 1/4" TS Mono Stereo Y-Cable Splitter Cord Compatible for iPhone, iPod, Computer Sound Cards, CD Players, Multimedia Speakers and Home Stereo Systems 15FT" You could also buy a bluetooth reciever/transmitter and plug the 3.5mm into that so you can walk around with your phone and play tunes that way. For example something like this again on amazon (there are many) APEKX Clip Bluetooth Audio Adapter for Headphones, Headset, Speaker, Wireless Receiver with MIC for Hands-Free Call and Music

Srx828s Portable Passive Non Powered Subwoofer System Dual 18 Inch

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🎶 Own the low end, dominate the room with JBL SRX828S!

BUILT TO ENDURE - Rugged 18mm wooden enclosure with steel grilles and DuraFlex finish for road-ready durability.
PRO LEVEL CONTROL - Fully supported in Audio Architect app for ultimate sound customization.
SEAMLESS INTEGRATION - Standard M20 pole cup and indexing feet for effortless stacking and setup.
UNMATCHED BASS POWER - Delivers thunderous 4800W peak output for earth-shaking low end.
PRECISION DUAL 18 DRIVERS - Two massive 18-inch woofers engineered for crystal-clear, deep bass.

The JBL Professional SRX828S is a passive dual 18-inch subwoofer designed for professional live sound and installed applications. With a peak power handling of 4800W and a max SPL of 141dB, it delivers powerful, precise bass across a 30Hz-150Hz frequency range. Built with a durable 18mm wooden enclosure and steel grilles, it’s engineered for rugged touring and installation use. Features like an M20 pole cup and indexing feet enable flexible setup, while full Audio Architect app support allows detailed sound control. Ideal for musicians, DJs, and venues seeking premium low-frequency performance.

Specifications

ASIN	B013LGCSWW
Additional Features	Portable
Antenna Location	public
Audio Driver Size	18 inches
Audio Driver Type	Dynamic Driver
Audio Output Mode	Mono
Best Sellers Rank	#155,816 in Musical Instruments ( See Top 100 in Musical Instruments ) #252 in Stage Subwoofers #51,081 in Music Recording Equipment
Brand	JBL
Color	Black
Compatible Devices	Amplifier
Compatible with Vehicle Type	Car
Connectivity Protocol	Wired (speakON NL4)
Connectivity Technology	Wired
Control Method	App
Controller Type	Remote Control
Customer Package Type	FFP
Customer Reviews	4.2 4.2 out of 5 stars (15)
Enclosure Material	Wood, Steel
Frequency Response	120 hertz
Global Trade Identification Number	00691991001666
Is Waterproof	False
Item Dimensions D x W x H	22.6"D x 47.4"W x 26.8"H
Item Type Name	JBL Professional SRX828S Compact Dual Passive Subwoofer System, 18 Inch (SRX828S)
Item Weight	137 pounds
Manufacturer	JBL Professional
Model Name	SRX828S
Model Number	SRX828S
Mounting Type	Tripod, Floor
Number of Audio Channels	2
Number of Items	1
Number of Power Levels	1
Power Source	Corded Electric
Signal-to-Noise Ratio	141 db
Speaker Maximum Output Power	4800 watts
Speaker Size	18 inches
Speaker Type	Passive Subwoofer
Specific Uses For Product	live music performances, mobile DJs, fixed DJ setups, singers, bands, corporate spaces, public speaking PA systems, houses of worship, sound system rentals, tours, and permanent installations
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	18 inches
UPC	691991001666
Unit Count	1 Count
Warranty Description	This product is sold by an authorized jbl professional north american dealer and includes the official jbl professional manufacturer’s warranty. The warranty is valid only for products purchased from authorized sellers within the united states. Full details are available on the jbl professional website.
Warranty Type	Limited Warranty
Water Resistance Level	Not Water Resistant
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	18 inches

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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SRX828S Portable, Passive, Non-Powered Subwoofer System, Dual 18-Inch, Black

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