The ad shows: "Phase and frequency controls for customizable setup." Where are these controls located? Thank you.

There are no controls on this speaker. It is just one very nice speaker for a really incredible price. I have purchased several and they give you a budget audiophile experience. I have 4 pairs. I gave a pair to my son with a sub I made for him. I also set up a stacked pair run in parallel for my daughter a old hifi trick. In this set up you can tune the bass some what by plugging the vent, this reduces bass output but gives some what tighter bass.We found that doing one pair and leaving the other open gave the best results. The last pair I am modifying to see how good a perforce I can extract from these speakers without changing the drivers or major expense. I see easy mods that should make a noticeable change.

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Pioneer SP-BS21-LR Bookshelf Loudspeakers Pair

REFURBISHED

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Superior Crossover for Full-Spectrum Clarity
Curved Cabinet Designed to Reduce Vibration
4" woofer, 1" soft dome tweeter, 80w @ 6 ohms
Phase and frequency controls for customizable setup

Overview

Specs

Reviews (4)

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When you're looking for bookshelf speakers, the desire is always the same: to find high-quality, great-sounding speakers that don't require a co-signer to buy. And it wouldn't hurt if they could look spectacular sitting on your shelf as well.

That's always been the challenge. Until now. Introducing the SP-BS21-LR Bookshelf Speakers from Pioneer.

Model
Brand	Pioneer
Model	SP-BS21-LR

Details
Type	Bookshelf Speakers
Sold As	Pair
Speakers Configuration	2-way
Driver Units	One 4" Woofer and One 1" Tweeter
Frequency Response	65 Hz-20 kHz
Nominal Impedance	6 Ohms
Sensitivity	84 dB
Remote Control	No

Features
Features	Oversized magnets for powerful bass Superior crossover design for full-spectrum clarity Curved cabinet construction designed to reduce vibration 1" soft dome tweeter for crisp, accurate high frequencies Designed for both 2-Channel Music and Home Theater applications

Dimensions & Weight
Dimensions & Weight	7.1" x 12.6" x 8.1" (W x H x D) / 8.4 lbs.

Additional Information
First Listed on Newegg	September 24, 2013

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 90 days
Limited Warranty period (labor): 90 days
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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Newegg.com's 30-Day Return Policy.
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Pioneer SP-BS21-LR Bookshelf Loudspeakers Pair

Refurbished

Learn more about the Pioneer SP-BS21-LR

Customer Reviews of the Pioneer SP-BS21-LR

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: N82E16886983001

Pioneer SP-BS21-LR Bookshelf Loudspeakers Pair

Refurbished

Learn more about the Pioneer SP-BS21-LR

Customer Reviews of the Pioneer SP-BS21-LR

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info