Cameras that cover the whole diamond
Wired lenses, quiet alarm panels, and rooms that sound like they should — pulled by a Houston crew that still shows up on Johns Rd.
Kit cameras leave the alley dark
Stick-on Wi-Fi pucks look busy on a phone and still miss the side gate. We run cable, set angles, and leave you a map — not an app you have to baby.
Big-box kit
- Battery cams that die on a Houston summer week
- Cloud login you share with a stranger’s data center
- One doorbell covering the porch and nothing else
Grand Slam walk
- Powered runs so the night shift stays on
- Recorder on your wall, not a monthly mystery fee
- Alley, driveway, and the door the kids actually use
Lenses, panels, and a room that sounds right
Security and AV sit on the same low-voltage board. David keeps both in one visit when the job allows.
Video that actually covers the property
We walk the lot, mark the dark corners, and hang cameras that stay powered. You get a coverage sketch, not a box of leftovers.
Alarm panels that stay quiet until they should not
Contacts, motions, and a keypad your family will actually arm on the way out.
AV racks that do not hum through the movie
Displays, distributed audio, and cable that hides instead of draping the baseboard.
Add-a-lens and retune visits
New angle on the shop door, a dead drop, a zone that chirps at 2 a.m. — we come back.
Questions we hear on the porch
Short answers. If yours is weirder, leave a number and David will talk it through.
Do I have to pay a monthly cloud bill?
Not from us. Recorder stays on your wall. If you want a monitoring company later, that is a separate conversation.
Can you work around a kit we already stuck up?
Usually. We keep what still covers a corner and replace the ones that die every August.
Do you do shops as well as houses?
Yes — bay doors, alley cameras, a quiet office TV. Same crew.
How do I start?
Leave a phone on the lineup card. You will see a thank-you on the screen, then we call.
Mertins still pulls cable himself
David S Mertins runs Grand Slam AV and Security LLC from 9597 Johns Rd in Houston. The van is not a franchise wrap. If the job is on the board, he is usually the one fishing the wall.
Security systems and AV share the same holes in the studs. We treat them as one trade so you are not coordinating two calendars.
- Local to 77049 and the east Houston loop
- Callback the same day when the board allows
- No scripted upsell on monitoring you did not ask for
Leave the number. We call the next inning.
Drop a phone on the lineup card. You will see a thank-you on the screen, then David calls from Houston.
Open the lineup card