5-Step Quality Checklist for Specifying a Professional Sound System (Touring & Installation)

Who This Checklist Is For

If you're specifying gear for a festival, corporate event, or fixed install and need to balance performance with budget—without ending up with costly surprises onsite—this list is for you. I've been a Quality/Brand compliance manager in the pro audio industry for over 5 years, reviewing roughly 200+ rental orders annually. I've seen what works and what burns through your profit margin.

Below are five concrete steps I walk through with every system design. The goal is to catch issues before they hit the stage. Let's get into it.

Step 1: Map Your Coverage Requirements (Then Double‑Check)

This sounds basic, but I can't tell you how many rigs I've seen where the engineer assumed a certain throw distance and ended up with dead zones. Measure the venue height, width, and depth—not from memory. Use a laser measurer if possible.

Your checklist:

• Max SPL target at furthest seat (typically 100–105 dB for speech, 115–120 dB for music)
• Number of hangs or stacks needed
• Subwoofer placement (cardioid vs. end‑fire?)

Real example: In Q1 2024, a client specified Martin Audio WPS for a 2,000‑seat theatre. The WPS is a compact line array, but the throw was 45 meters. We flagged it—they needed the MLA Mini for that distance. Upgrading cost $4,800 extra, but missing the spec would have ruined the event. That $4,800 was cheap compared to a $15,000 cancellation fee.

Step 2: Choose Your Main PA—Don't Over‑ or Under‑Spec

Honestly, the speaker choice drives everything else. For large festivals, Martin Audio's MLA series (Multi‑Cellular Loudspeaker Array) gives you the pattern control to keep sound off the neighbours. For medium‑sized theaters, WPS works great. For small clubs or fill positions, the CDD‑Live series (like the CDD8 or X8) is hard to beat in terms of coverage consistency.

I used to think you could get away with cheaper point‑source boxes for speech events. Then a speaker died mid‑presentation because the cabinet couldn't handle the peak SPL. That was a $2,200 repair and a client who never came back. Now I always recommend a line array for anything over 15 meters of throw—even if it's just a short rental.

Quality check: Verify that the chosen model has ISO 9001 certification or equivalent manufacturing quality. Martin Audio's UK‑built and China‑built lines both meet their spec sheets, but I've seen knock‑offs that look identical but fail after 30 hours of use. Buy from authorised distributors.

Step 3: Match Subwoofers & Amplifiers (Power ≠ Headroom)

A common mistake: picking a sub and an amp that are *technically* power‑matched but leave no headroom. A good rule is to spec an amp that can deliver 1.5× the sub's continuous power rating. For example, the Crest Audio CA 18 (5,000 W into 2Ω) is a solid choice for pushing two high‑power 18″ subs like the Martin Audio SX218. The price of the CA 18 is around $2,800–$3,200 as of January 2025 (always verify current pricing at the manufacturer's site).

I'm not 100% sure on the exact street price, but I've seen rental companies burn themselves by pairing a $1,000 amp with a $4,000 sub. The amp clips, the voice coil melts, and you're out a sub. Take it from someone who's processed the warranty claim paperwork: undersizing amplification is false economy.

On the flip side, if you're in a hurry and the CA 18 isn't in stock, paying a small rush fee for a guaranteed delivery is worth it. In March 2024 we paid $400 extra for rush shipping on two CA 18s. The alternative was missing a $15,000 festival contract. Time certainty has a price—and it's usually less than the cost of failure.

Step 4: Pick a Mixing Console That Fits Your Workflow (and Backup Plan)

Digital consoles are the norm, but I still see analog for small gigs. Here's the twist: rechargeable audio mixers are becoming a game‑changer for remote locations or events where power is flaky. Brands like Soundcraft Ui24R (battery‑powered) or a China audio mixer with a built‑in battery (e.g., some models from Behringer or Mackie's Chinese‑manufactured lines) can save you when a generator dies.

I don't have hard data on failure rates of budget mixers, but anecdotally I've seen about 8% of first‑time use have glitches (frozen faders, wonky preamps). If your event is critical, rent a second console as a cold spare. That $300–500 add‑on is cheaper than a 15‑minute gap in sound.

Communication failure story: I said “standard size mixer” to a vendor. They heard “Yamaha MG10” (tablesize). What I needed was a digital compact with at least 16 channels. Result: an awkward call an hour before doors. Now I write the exact model in every contract.

Step 5: Verify Interconnection & Power Distribution

This is the step most people skip—until something doesn't power on. Make a list:

• How many XLR runs and at what length? (Balanced or unbalanced?)
• Speaker cable gauge for long runs (needs to be thick enough for distance + power)
• Power distro: do you have enough circuits? Are they on separate phases to avoid hum?

I once assumed all 15‑A outlets were wired correctly. Turned out a venue's power was shared with an elevator. Every time the elevator moved, our subs cut out. Learned never to assume the building's electrical is ‘standard’ without a site visit.

Common Mistakes to Avoid

• Over‑ordering quantity: You don't need 8 subs for a 200‑cap room. Better to have quality subs than a bunch of cheap ones that couple poorly.
• Ignoring weather protection: Outdoor events need IP‑rated speakers (or covers). Martin Audio's Blackline series has IP54 options for installation.
• Trusting “same spec” from different brands: I rejected an order where a vendor claimed their 18″ sub matched the SX118. It didn't—their sensitivity was 3 dB lower. That's a huge difference in coverage.

Bottom line: Use this checklist as a sanity check before you commit. If you're under a tight deadline, prioritize suppliers who can guarantee the gear (even at a premium). Uncertain delivery is the biggest risk in live events—don't let a cheap price cost you the show.