Speaker impedance and frequency response ?

8 Ohms each, 60 - 24,000 Hz response but without a decibel variation or a response curve that is meaningless. They do say the -3db useful low end is 65 Hz. Over all it is a good value for use in a small room like a small bedroom or computer office say about 10' x 10'. I play mine with "loudness" on and have the bass turned up a bit to give a nice balanced sound on most material. These would obviously benefit from being paired with a subwoofer, but they are still adequate even without for normal listening. You'd have to spend at least double the money to get much better speakers. Note that oftentimes through the year, Amazon and Best Buy will have these on sale for about $49 for the pair, which is when I bought mine, so obviously THAT makes them an even better deal. I've compared a lot of small bookshelf speakers and to my ears, you'd have to get some Boston Acoustics at $250 for the pair to offer anything much better than these, but you may wish to compare them to others by Klipsch and JBL. But really, when I got them for $49 I was VERY happy with them and how they have grown on me after I broke them in for a few hours. Do be aware that playing them overly loud can result in some "noise" or "rattle" from pushing the little 5.25" woofer too hard. You just need to use some common sense and have realistic expectations for such small speakers in terms of volume.

Should I set this speaker to "Small" or to "Large" in my receiver? My Yamaha RX-V581 automatic calibration sets this to Large.

So this depends on your receiver. I realize this is an old question, but could be helpful for others. Many receivers have the speaker size selection and many newer (last several years) receivers may also allow you to tweak your crossover settings for each set of speakers. Basically, what that means is that if your sub crossover is set at 150 hz, you want your other speakers to pick up the frequency where the sub left off. So you would want your other speakers to "crossover" at 150 hz. This means that those speakers will play frequencies from 150 hz and higher. If you set your sub for 80 hz and your other speakers at 150 hz, you'll miss all of the sounds between 80 and 150. All that to say, if you set your speakers to small, you'll want to look in your receiver manual to see what the low frequency cut-off is so you know what to set your sub crossover at. This way, you won't lose part of your sound.

Do you need a receiver to use these? or can i just hook up to my tv?

I have seen TVs that have speaker outputs, but it's pretty rare. If your TV has those, they'd be labeled "External Speakers" or something like that. Otherwise you need a receiver or at least an amplifier.

Is this price for one speaker or the pair

Try to confirm: As of today 12/03/2021, the price list is $99.00 and in the title, it says: "single" and in "What in the box" says: 1 tower speaker. So this price is for 1 single speaker and not a pair of speakers. Is this correct?

Input voltage	240 Volts
Mounting type	Wall Mount
Material	Wood
Model name	T15BK
Speaker type	Bookshelf
Special features	Bass Boost, Built In Microphone, Hi Res Audio, Multi Room Audio
Recommended uses for product	For Indoor Use, For Music Players, For Surround Sound Systems, For Televisions
Compatible devices	Gaming Console, Home Theater, Television
Subwoofer diameter	5.25 Inches
Unit count	1 Count
Surround sound channel configuration	2.1, 5.1
Colour	Black
Included components	Remote
Product dimensions	19D x 28W x 17H centimeters
Item weight	3.74 kg
Is waterproof	FALSE
Warranty type	Limited
Maximum range	7 Meters
Number of Items	2
Control method	Touch
Wireless communication technologies	Bluetooth
Speaker size	5.25 Inches
Power source	Electrical Wire
Manufacturer	POLK AUDIO
Country of origin	Japan
Item model number	T15
ASIN	B002RJLHB8

Polk Audio T15 Bookshelf Speakers, Speaker System for Home Cinema Sound System, 0.75'' Tweeter & 5.25 Dynamic Balance Driver, Wall Mountable, Dolby & DTS - Black, wired

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