Mountain Audio and Video 307 - Mav307

Mountain Audio and Video 307 - Mav307 Premier sales and install of mobile media electronics in Powell, WY

10/29/2025

Come grab our last pair of DBZ 12’s until we get our next shipment in!! Paired with the correct air space box also by Down4Sound, you are sure to not only enjoy your music but everyone will hear you coming! Pair these with the JP13 amplifier (shown here) you are sure to love it!

This is a HUGE build in Nelli’s 1994 Toyota Celica! Take a look at the process and the build today. There are a few twea...
09/04/2025

This is a HUGE build in Nelli’s 1994 Toyota Celica! Take a look at the process and the build today. There are a few tweaks, as this is Tony’s daughter’s vehicle so things can be changed easily on site.

• Custom subwoofer box by Mountain Audio and Video 307 - Mav307

•Custom Plexiglass Down4Sound logo designed by me, cut in vinyl and sandblasted by Austin of 307 Vinyl Guy

• Teal powder coated high output alternator @ 280amp by Singer Alternators

Lots from Down4SoundShop ↓

• 2 Down4Sound 12” dBz Subwoofers 1300w RMS 2ohm

• Down4Sound JP77 in teal, 7channel amplifier rated at over 3000w RMS

• 2 Down4Sound Hexicone 4ohm 8” speaker, one in each door @ 300W RMS

• 2 Down4Sound JFXTW1 Silk Dome Tweeters, one on each door @ 100W RMS

• 2 Down4Sound JFX653S 6.5” speakers with 1” silk dome in rear seat panels

• 2 Down4Sound JFX35 3.5” speakers with 1” silk dome tweeters in custom footwell kick panels

• Down4Sound EZY DSP68+ , adjust on the fly every aspect of all 8 channels of high & low level inputs

• Over 100’ of Full Tilt Audio 1/0 power wire in teal

• LED light features in subwoofer box, front kick panels, battery balancer panel in rear, amp fuse panel in rear. Soon to come, LED features for both lithium batteries, amp rack and under dash.

• Decibel, wattage and voltage meters by ʙᴀꜱꜱʜᴇᴀᴅ ɢᴀʀᴀɢᴇ

• 2 230aH 16v LiFePO4 batteries in trunk by JAG35

•D3400R 12v battery by XS Power Batteries (new battery coming soon, this one is now in Austin’s RX-8 build)

• Body and paint by Nelli

MAV307 can make all your build dreams come to life, from mild to W I L D!!! Be a show stopper, and upgrade your tunes into a one-of-a-kind build!

Another recent install, this customer had purchased a pre-built amp rack, Mosconi amplifier, 2 Focal 10” subwoofers and ...
09/04/2025

Another recent install, this customer had purchased a pre-built amp rack, Mosconi amplifier, 2 Focal 10” subwoofers and a prebuilt box, for us to install. Paired with the factory B&O sound system, this Raptor has crisp, clean sound and bass.

Handled with the utmost care and installed with precision, we enjoyed doing this install!

Recent custom build in a 2024 Chevrolet Silverado! Custom amp rack with the JP84 powering the mids and highs, and the JP...
09/04/2025

Recent custom build in a 2024 Chevrolet Silverado! Custom amp rack with the JP84 powering the mids and highs, and the JP13 powering 2 shallow DD 12’s in a custom box under the rear seat. Custom plexiglass done in house by Austin of 307 Vinyl Guy. Integration with the factory head unit, factory subwoofer still in use as a mid range woofer.

You have visions, we make it happen. 🔊

Summer was full of installs! This 1964 Suburban is bumping' around Powell, now with a pair of Down4Sound 6x9" and enclos...
08/27/2025

Summer was full of installs! This 1964 Suburban is bumping' around Powell, now with a pair of Down4Sound 6x9" and enclosures. We love the car community and helping them have some sweet tunes!

Just completed this single din install paired with Digital Design 6x9” speakers in the rear, in a 1987 Mercedes 560 SL i...
06/16/2025

Just completed this single din install paired with Digital Design 6x9” speakers in the rear, in a 1987 Mercedes 560 SL in a beautiful red! The car is FOR SALE BY OWNER! Perfect summer car, shifts wonderfully and is ready to play some tunes!

Mountain Audio and Video 307 - Mav307 in Powell is running Fathers Day specials on select headunit inventory! Come score...
06/13/2025

Mountain Audio and Video 307 - Mav307 in Powell is running Fathers Day specials on select headunit inventory! Come score 1/2 OFF on the Nakamichi NA3600M 6.75" double din AM/FM/DVD/BT Receiver, 1/2 OFF on the Pioneer DMH-342EX 6.8" AM/FM/BT Double Din Receiver and $100 OFF on the Pioneer DMH-T450EX 9" AM/FM/BT Double Din Receiver!

Stop by MAV307 for all of you car audio needs, installs and even remote starts! PLUS on Saturday June 14 join us for FREE HAMBURGERS AND HOT DOGS starting at 11a!! A fun time for all!

Mav307
907 E 3rd St, Powell, WY
Weekdays 9a-6p
Saturday 9a-5p
Sunday CLOSED

Single din upgrades are oh so nice! We were very glad to help this family upgrade one of their trucks with a new Alpine ...
01/18/2025

Single din upgrades are oh so nice! We were very glad to help this family upgrade one of their trucks with a new Alpine single din system.

Thank you guys for coming up from Worland and choosing MAV307!

Jeeps are popular! Join the party of folks who have upgraded their stock stereos for a new double din, complete with the...
01/18/2025

Jeeps are popular! Join the party of folks who have upgraded their stock stereos for a new double din, complete with the Jeep dash kit.

Thank you for choosing MAV307 to upgrade your ride!

Back up cameras are SO useful! Upgrade your vehicle with one today, installed by us! Wires are always ran safely, as saf...
01/18/2025

Back up cameras are SO useful! Upgrade your vehicle with one today, installed by us! Wires are always ran safely, as safety is our top priority when you are on the road.

Thank you for coming in to MAV307 after your hunting day!

This client knew he wanted bass, so we gave it to him! This Bronco had the work started for us, so we worked our magic t...
01/18/2025

This client knew he wanted bass, so we gave it to him! This Bronco had the work started for us, so we worked our magic to replace and mount the front door speakers and rear speakers. We cleaned up the wiring so our client will have no issues with catching a wire and disconnecting something!

We also know these Broncos are a gem, so we ensure we cut as little as possible to retain the value of the vehicle.

Thank you so much for choosing MAV307, we can’t wait for your next vehicle!

Client already had the subs, they just needed an amp and radio, and our magic of wiring! This truck left with the owner ...
01/18/2025

Client already had the subs, they just needed an amp and radio, and our magic of wiring! This truck left with the owner smiling ear to ear. That’s what we love!

Thank you guys for coming to MAV307!✨

Address

907 E 3rd Street
Powell, WY
82435

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm
Saturday 9am - 5pm

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