Church AV calculators and gear specification
Church AV advice is almost all written by people selling systems. This is the neutral tool. Put your seat count, your ceiling height and your screen width in, get a specification you can take to a committee meeting, and see the gear whose numbers actually match the answer.
Last updated
Start with your own numbers
The whole answer on one page
Every number a first-pass specification needs, computed from one input: amplifier watts, loudspeaker count, console channels, wireless channels, monitor mixes, screen size, reverberation target and ADA receiver counts.
The decisions that cost the most
A beautiful console feeding inadequate loudspeakers is the most common way a church wastes a building fund. Loudspeakers and their amplification set the ceiling on everything else, so they get about a third of the budget and they get bought first.
The console most churches actually end up with, and for good reason: 32 Midas-designed preamps, 25 motorized faders, full scene recall and an AES50 port that carries a 32 channel stage box on one cable.
Best for: A 250 to 800 seat room with a band, where volunteers rotate weekly and scene recall saves the service
Check price on Amazon
The default answer for a church main speaker, and the one most rental companies own. A 2,000 watt class D amplifier, a 75 degree conical pattern that throws evenly to the back, and preset voicings that get a volunteer close on the first try.
Best for: A 150 to 400 seat sanctuary on stands or flown, for almost any service style
Check price on Amazon
The SM58 capsule on a BLX transmitter, which is the wireless most churches settle on. Up to twelve compatible channels per band, and the capsule is the one every singer already knows how to use.
Best for: Worship vocals and a roaming handheld in a 100 to 500 seat room
Check price on Amazon
Four HDMI inputs, a hardware encoder that streams straight to YouTube or Facebook with no computer, and a multiview output so the operator sees every camera at once. The no-computer part is what makes it work with volunteers.
Best for: The standard church livestream: two or three cameras plus slides
Check price on AmazonComplete systems, priced
Not a shopping list: a complete system. If a church buys one of these, it can hold a service. Each build says plainly what to skip and what to upgrade first, and the totals are computed from the listed prices rather than estimated.
Browse by category
Quick answers
| Question | Short answer |
|---|---|
| How many watts for a 250 seat church? | About 640 watts per loudspeaker, or 1,900 watts across three boxes, for a blended service at 88 dBA with 12 dB of headroom and a 62 foot throw. |
| How far apart should ceiling speakers be? | At a 10 foot ceiling, a 90 degree speaker covers 12 feet at seated ear height, so 8.5 feet apart for speech. Measure to ear height, never the floor. |
| How many lumens for a church projector? | A 12 foot wide screen under normal service lighting needs about 2,600 lumens. Lumens alone means nothing: it is screen area times foot-lamberts divided by gain. |
| Which wireless frequencies are legal? | In the US, 470 to 608 MHz is the working band. 617 to 652 and 663 to 698 MHz are illegal to operate, and secondhand gear tuned there is worthless. |
| What upload speed does a livestream need? | A 1080p30 stream runs about 4,700 kbps, so roughly 10 Mbps of measured upload. Measure it wired, at service time, not on the bill. |
| How many assistive listening receivers? | A 250 seat church needs 10 under the 2010 ADA table, of which 3 must be hearing-aid compatible. Houses of worship are exempt, but most meet it anyway. |
Every figure here is computed by the linked calculator from standard engineering formulas, which each page shows.
Every pick is matched to a real room size, seat count or input list using manufacturer specification sheets, operator manuals, FCC rules where spectrum applies, published standards, warranty terms and the recurring themes in verified owner reviews. We do not test products in person and we never claim to. Picks are split into small church, mid-size and large or multi-campus tiers so the recommendation fits the room rather than the price bracket.
They are planning tools built on standard audio and video engineering formulas, and every page shows the formula it used so you can check the working. Amplifier power comes from target level, loudspeaker sensitivity, throw distance and peak headroom. Ceiling spacing comes from coverage cone geometry measured to ear height. Real rooms vary, so use them to size equipment and budget, then confirm with a measurement before a permanent installation.
As an Amazon Associate we earn from qualifying purchases made through product links, at no extra cost to you. That is why every product link points at a specific verified listing. It is also why we regularly recommend buying less: a system that does not fit the room gets replaced, and that costs us your trust, which is worth more than one commission.
A volunteer can specify and run a system in most rooms up to a few hundred seats, which is who this site is written for. Three things always need a professional: anything flown overhead needs a structural engineer or certified rigger, all electrical work needs a licensed electrician, and any room above roughly 500 seats needs an integrator who can produce a coverage prediction for your actual drawings.
Researched, not professional advice. Everything here is compiled from published manufacturer specifications, operator manuals, FCC rules, published standards and owner-review consensus, not hands-on testing. The calculators size equipment; they do not design a system. For a permanent installation engage a qualified integrator, have any flown loudspeaker and its attachment points signed off by a structural engineer or certified rigger, and have all electrical work done by a licensed electrician to your local code. As an Amazon Associate we earn from qualifying purchases.