are the tweeter angles adjustable?

No, the angle is not adjustable.However, both the tweeter and the main driver are not "flat" facing directly downwards; both are mounted tilted at a fixed angle. And since you can rotate the speaker, you have reasonable postition nadjustment towards the listening point.Besides... sound quality is AWESOME!!!

Anybody match this line up with any monitor series towers? How do they sound together? I got some 70s...

I guess you will use your Monitor Series tower speakers as front speakers and the in-ceiling 70-RT as rear/surround speakers.Haven't done that exact match. However, I checked specs for the Monitor Series towers and the RT floor standing speakers the RT-70 are designed to match. Both speakers are full range (as the RT-70) and appear to have the same tweeter (1" silk/plymer). Midrange and Subwoofer differ a bit in size and type.My guess is, considering the RT-70s specs and superb performance (I use mine in a 2.1 arrangement in my bedroom), any acoustic mis-match (if any) should be hard no notice. I would say, go ahead!

Can i install 7 polk audio 70rt speakers for 7.1 system

Yes, if you have a hollow ceiling and you want discreteley mounted recessed speakers, I'm sure these will work great!Polk has available in-ceiling subwoofers, or you can hide the sub behind a couch or sofa...

ASIN	B0057XVZ72
Audio Driver Size	7 Inches
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#56,259 in Electronics ( See Top 100 in Electronics ) #80 in Ceiling & In-Wall Speakers
Color	White
Compatible Devices	Laptop, Speakers
Control Method	Remote
Customer Reviews	4.6 4.6 out of 5 stars (222)
Date First Available	June 24, 2011
Department	Grocery & Gourmet Food
Global Trade Identification Number	00747192120771
Impedance	8 Ohms
Included Components	Polk’s Wafer-thin Sheer Grille - White, Paintable
Is Discontinued By Manufacturer	No
Is Waterproof	False
Item Weight	1 pounds
Item model number	70 RT
Manufacturer	Polk Audio
Material	Fire-resistant plastic or composite material
Model Name	70RT
Number of Items	1
Power Source	Corded Electric
Product Dimensions	11"D x 13"W x 9.8"H
Recommended Uses For Product	paint
Series Number	70
Set Name	Vanishing Series
Shape	circular
Speaker Size	7 Inches
Speaker Type	In Ceiling
Special Feature	Built In Microphone
Specific Uses For Product	home audio, custom home theater, discreet installation, permanent installation, spacesaving, high-quality audio, full-range performance
Style	Speaker
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	2.5 Inches
Surround Sound Channel Configuration	3.0
Tweeter Diameter	0.75 Inches
UPC	747192120771
Unit Count	1.0 Count
Warranty Type	Lifetime
Woofer Diameter	7 Inches

70 RT Full-Range Bandpass Dual-Port In-Ceiling Loudspeaker

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