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Hide It in the Attic. Cancel Cable.

Cosari SignalVault 150

A directional dual-band antenna that screws onto one attic rafter, ignores nearby 5G towers, and sends 70+ free local channels.

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  • Real VHF + UHF elements lock CBS, ABC
  • Built-in 608 MHz filter blocks 5G cell tower
  • Powered through the coax, so no attic outlet
  • Feeds your existing splitter to light up every
Cosari SignalVault 150
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Built for the Attic, Not the Window

Everything that makes flat antennas fail at 40+ miles, fixed in one sealed directional panel.

Dual-Band Directional Array

Separate VHF-Hi and UHF elements aimed at your towers pull in channels 7–36, including the VHF networks flat antennas miss.

Hardwired 608 MHz LTE Filter

Cuts 4G and 5G cell signals before they reach the amplifier, so a nearby tower can't overload your TV tuner.

Power Through the Coax

The USB injector plugs in behind your TV and powers the SmartBoost amp up the cable. No outlet in the attic required.

4K ATSC 3.0 Ready

Receives today's HD broadcasts and NextGen 4K HDR channels with any ATSC 3.0-compatible TV or tuner.

How the SignalVault 150 Works

Aim It Through the Roof

Aim It Through the Roof

Mounted on a rafter and pointed at your towers, the directional array captures VHF and UHF signals through shingles and wood decking.

Filter, Then Boost

Filter, Then Boost

The 608 MHz filter removes cell interference, then the low-noise SmartBoost amp (under 1.2 dB noise figure) adds 14 or 28 dB of gain.

Watch on Every TV

Watch on Every TV

Clean signal travels down 32.8 ft of quad-shielded RG6 to your TV or splitter. Run one channel scan and you're done.

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Cosari SignalVault 150

Amplified 4K ATSC 3.0 Attic & Indoor HD Antenna with VHF/UHF Elements and 608 MHz LTE Filter

Backed by our 30-Day Money-Back Trial & Full Cosari Guarantee.

$44.99 $89.99 Free Tracked Shipping (5–7 Days) Included

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30-Day Money-Back Guarantee plus a full 2-Year Warranty.

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Description

Why attic placement beats the window: An attic puts the antenna higher and closer to a clear line toward your towers, and lets you connect to the coax already running to every room. Shingles and decking cost only a few dB, which the 28 dB gain setting makes up for.

Why the LTE filter matters: Cell towers broadcast just above the TV band. Cheap amplifiers boost that noise along with your channels, which causes pixelation and audio dropouts. The SignalVault 150 filters everything above 608 MHz before amplifying.

Honest range expectations: Rated up to 150 miles in open terrain. Through shingles in a typical suburb, expect 65–90 miles. Metal roofs and radiant foil barriers block signal, so mount at a gable window or eave in those homes.

5–7 Day Shipping & 30-Day Returns

Free 5–7 Day US Shipping: Every order ships free with full tracking and delivers in 5 to 7 business days.

30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.

2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.

Why Choose the Cosari SignalVault 150?

Cosari SignalVault 150 Detail

One Install, Every Room

Screw it to a rafter, connect it to your existing splitter, and every TV jack in the house goes live.

Rated for Attic Extremes

UV-stabilized housing rated from -22°F to +149°F, backed by a 2-year warranty.

Pays for Itself in Weeks

At $44.99, it costs about half of one month of a live TV streaming plan.

Cosari SignalVault 150 vs. Ordinary Alternatives

Cosari SignalVault 150Standard Competitors

FeatureCosari SignalVault 150Standard Competitors
VHF channels 7–13Dedicated VHF-Hi dipoleOften missing on flat antennas
5G/LTE interferenceHardwired 608 MHz filterUsually unfiltered
Amplifier powerThrough the coax, no attic outletNeeds a nearby outlet or no amp
AssemblyPre-assembled, 2 screwsLoose rods or adhesive strips
Monthly cost$0$83+ for live TV streaming
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What's Included

In the Box
  • 1 × SignalVault 150 Directional Antenna Panel with Pivoting J-Mount Stand
  • 1 × 32.8 ft (10 m) Quad-Shielded RG6 Coaxial Cable with Gold-Plated F-Connectors
  • 1 × SmartBoost Low-Noise Amplifier & 608 MHz LTE Filter with USB Power Injector
  • 1 × Stainless Steel Rafter Screw & Wall Anchor Kit
Technical Specifications
  • Frequency Bands: VHF-Hi 174–230 MHz / UHF 470–608 MHz
  • Amplifier Gain: Switchable 14 dB Low / 28 dB High (SmartBoost)
  • Amplifier Noise Figure: Under 1.2 dB
  • LTE/5G Filter: Hardwired band-stop above 608 MHz (-35 dB rejection)
  • Rated Range: Up to 150 miles open terrain (65–90 miles typical through shingles)
  • Connector & Cable: 75-Ohm gold-plated F-type, 32.8 ft quad-shielded RG6
  • Dimensions: 11.8 × 6.5 × 1.8 in
  • Operating Temperature: -22°F to +149°F (-30°C to +65°C)
Care & Safety
  • Check the F-connector once a year and make sure it's finger-tight with the rubber boot seated. A loose connector is the most common cause of signal loss over time.
  • If you add a new TV or reroute cables, re-run the channel scan on each TV. Broadcasters occasionally change frequencies, so a rescan every few months picks up new channels.
  • Backed by our 30-Day Money-Back Guarantee & Full Cosari Warranty
  • Customer Support: support@buycosari.com
In the Box Cosari SignalVault 150

Set Up in 3 Steps

Swipe left for steps 2 and 3

  1. Mount & Aim
    1

    Mount & Aim

    Screw the J-mount to an attic rafter or set it on a high shelf, then point it toward your towers using a phone compass.

  2. Connect & Power
    2

    Connect & Power

    Run the coax to your TV's ANT IN port or your splitter, then plug the USB power injector into the TV.

  3. Scan & Watch
    3

    Scan & Watch

    Press Auto Channel Scan on your remote and watch your free local channels lock in.

Verified Customer Reviews

What 200+ Verified Buyers Say About the Cosari SignalVault 150

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97% of buyers recommend the Cosari SignalVault 150
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Mark D.2 days ago

Hooked into my old DirecTV splitter in the attic—all 4 TVs work!

I refuse to pay $83 a month just to watch Sunday football and local news. Connected the SignalVault 150 straight into the existing 4-way coax splitter in my attic where our old satellite dish used to hook up. Now all 4 TVs in my house get 68 crystal-clear channels with zero visible wires in the living room. Even through plywood decking and heavy architectural shingles, the 28 dBi high-gain setting pushed every major network over 95% signal strength.

Verified Purchase · Frisco, TX · Cosari SignalVault 150

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Brian K.4 days ago

No outlet in the attic? No problem. Goodbye ugly window leaf.

My wife was thrilled that I finally took that ugly black plastic sheet and dangling wire off the living room window. Before I climbed into the attic, I set it on the media console behind the TV just to test how the coax-powered SmartBoost injector works—you plug the USB power adapter in downstairs behind your TV, and it sends power right up the coaxial line to the antenna. Zero electrical outlets needed up in the rafters.

Verified Purchase · Naperville, IL · Cosari SignalVault 150

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Greg T.1 week ago

HOA has no clue it's up there and it pulls towers 48 miles out

Our HOA fines you $100 if they see an antenna mounted on your roofline or fascia. Hiding the SignalVault 150 inside the attic bypassed the HOA completely and still reaches the South Mountain broadcast towers 48 miles away. Best part was no tiny aluminum rods to assemble in a warm attic—just two screws into a 2x4 truss, aim it with a phone compass, and tighten the thumbscrew.

Verified Purchase · Scottsdale, AZ · Cosari SignalVault 150

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kevin_m821 week ago

Finally got our VHF channels (CBS and ABC) without pixelation

Right on 3rd and goal in the 4th quarter, my old flat window antenna froze into pixelated blocks and lost audio. Those flat sheet antennas are useless if your local CBS or ABC station broadcasts on VHF-Hi. This unit actually has real VHF dipoles inside the housing. Hasn't dropped a single frame in 3 weeks and uncompressed OTA football looks noticeably sharper than cable.

Verified Purchase · Charlotte, NC · Cosari SignalVault 150

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Dave R.2 weeks ago

The 608 MHz 5G filter actually works next to a T-Mobile tower

We live about 0.3 miles from a cell tower that got upgraded with 5G panels last fall, and it completely wrecked our over-the-air reception every evening. The built-in 608 MHz LTE/5G filter on the SignalVault 150 wiped out the interference on the first scan. Locked in 62 channels including the new ATSC 3.0 NextGen broadcasts.

Verified Purchase · Columbus, OH · Cosari SignalVault 150

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Sharon W.2 weeks ago

Paid for itself in less than half a month of YouTube TV

With the 50% off deal this cost less than half of what ONE single month of our streaming live TV package was costing us. Unlike the $95 name-brand attic antenna at the hardware store that makes you buy your own coax and preamp separately, this came with a thick 32-foot RG6 cable and the power injector right in the kit.

Verified Purchase · Macon, GA · Cosari SignalVault 150

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Phil H.3 weeks ago

Low/High gain switch kept nearby towers from overloading the tuner

We're in a weird spot where PBS is 11 miles away and Fox/NBC are 44 miles out. Cheap amplified antennas always overloaded our Sony tuner on the close station. Flipping the SmartBoost inline switch to the 28 dBi setting while aiming slightly off-axis balanced all of them cleanly.

Verified Purchase · Waukesha, WI · Cosari SignalVault 150

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t_henderson3 weeks ago

Holds signal through wet cedar shakes and Douglas firs

Pacific Northwest rain on wet roof shingles usually drops marginal UHF channels by 20%. Mounted this at the highest peak of our garage attic pointing toward Seattle (~38 miles) and we haven't had to rescan once through two heavy rainstorms.

Verified Purchase · Puyallup, WA · Cosari SignalVault 150

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Robert L.1 month ago

Took 12 minutes to mount on a roof rafter

The pivoting base swivels a full 180 degrees so you can screw it straight into a vertical stud, an angled roof rafter, or stand it flat on a joist plank. Used the AntennaPoint app to find 142 degrees magnetic, tightened the knurled knob by hand, and pulled 59 channels down in the den.

Verified Purchase · Ocala, FL · Cosari SignalVault 150

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Carla M.1 month ago

Works great on top of a tall bookcase too

We live in a single-story townhome with no attic access, so I set it on its pivoting desktop stand on top of a 7-foot bookcase in the spare bedroom facing Mount Arden. Because it's matte slate gray and compact, you barely notice it's there, and it pulls 39 more channels than our old flat wall antenna.

Verified Purchase · Henderson, NV · Cosari SignalVault 150

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Frequently Asked Questions

Does the SignalVault 150 pick up VHF channels as well as UHF?

Yes. It has a dedicated VHF-Hi dipole for RF channels 7–13 and a separate UHF element for channels 14–36. In our test it held two difficult VHF stations above 24 dB SNR for 72 hours.

Will it work through asphalt shingles in my attic?

Yes. Wood decking and asphalt shingles typically cost 3–5 dB of signal, and the 28 dB high-gain setting makes up for that. Only metal roofs and foil-backed radiant barriers block reception.

How do I power the amplifier if there's no outlet in my attic?

The USB power injector plugs in downstairs, behind your TV or into its USB port, and sends power up through the coax cable. You don't need any outlet in the attic.

Can I use it with more than one TV?

Yes. Connect it to the existing coax splitter in your attic, often left behind by a cable or satellite company, and every connected TV in the house receives the signal.

Do I need internet or a subscription?

No. Over-the-air broadcasts are free. There's no internet connection, no app, and no monthly fee.

Is it compatible with ATSC 3.0 / NextGen TV?

Yes. It receives both ATSC 1.0 and ATSC 3.0 broadcasts. To watch NextGen 4K HDR channels, your TV or tuner box needs an ATSC 3.0 tuner.

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