We read the spec sheets for 340 pieces of home theater gear. Here’s what the makers won’t tell you.

I run a small site that does one unglamorous thing: we read the official spec sheet for every product in our catalog, record exactly what the manufacturer states, and refuse to fill in the blanks. No estimates, no “probably.” If a maker doesn’t publish a number, our database stores “unstated” and the page says so.

After 340 products (327 currently listed), the blanks have a shape. Here is what stood out.

1. If you game, the spec sheets abandon you

Buying a display or receiver for a PS5 or Series X is the single worst spec-sheet experience in home theater.

Of the 38 projectors we track, the number whose spec sheets state whether VRR works is zero. Not few. Zero. Two of 38 state ALLM. TV makers manage to state VRR support on 38 of 40 models, so the projector industry can’t claim the field is too obscure to print.

TVs have their own version of this. Only 5 of 40 state input lag at 4K/120, the number a gamer would actually want. And only 22 of 40 say how many of their HDMI ports are actually HDMI 2.1. The box says HDMI 2.1. Which ports? How many? Usually silence.

Receivers are worse: 14 of 40 state their HDMI 2.1 port count. You can spend four figures on a receiver and not know, from the official sheet, whether your second console gets a full-bandwidth port. We track one that proves it, and it’s in the next section.

And when the sheets did state it, it wasn’t always true. In 2020, an entire generation of Denon, Marantz, and Yamaha receivers shipped with an HDMI 2.1 chip that couldn’t actually pass 4K/120 from an Xbox Series X. Spec sheet: compliant. Reality: black screen. The fix required a free external adapter box, and in some cases a physical board swap. Later reporting found the same chip also breaks QMS permanently, with no firmware fix possible. Every current model we track is a later generation and unaffected, but it’s the clearest proof that “HDMI 2.1” on a sheet is a version number, not a promise.

2. Paying more can buy you less information

Here’s a pair that surprised us. The Denon AVR-X1800H tracks at $550. Its bigger sibling, the AVR-X2800H, tracks at $1,299. Same 7.2 channel count. The power gap is 95W vs 80W, which both companies honestly measure the same way, and which works out to about 0.7 dB. That’s near the edge of what anyone can hear.

Now the strange part. The cheaper X1800H states four HDMI 2.1 ports and nine processing channels. The X2800H, at 2.4 times the price, states no HDMI 2.1 port count at all, and carries seven processing channels to its cheaper sibling’s nine. On the published numbers, the more expensive receiver discloses less and does less. Maybe it has advantages the sheet doesn’t mention. That’s exactly the problem. The field-by-field comparison is here.

3. The sensitivity number you’re comparing is not one number

46 of our 47 speakers publish a sensitivity figure, and it looks wonderfully comparable: 85 dB, 88 dB, 94.5 dB. Then you ask how it was measured, and only 5 of the 46 say.

This matters more than any other omission on this list, because the two common methods differ by roughly 3 dB, and 3 dB is the entire audible gap between “efficient” and “hungry.” SVS states its figures anechoically, the strict method. Klipsch publishes 94.5 dB on the RP-600M II with no stated method at all. Those two numbers get compared side by side in a thousand forum posts as if they came from the same ruler. They didn’t, and 41 of 46 sheets won’t even tell you which ruler they used.

The other half of the amplifier question is worse: only 19 of 47 speakers state their minimum impedance, the number that decides whether a budget receiver can drive them safely. The rest publish a nominal “8 ohms” and let you find out.

4. Nobody will tell you if the price is for one speaker or two

Of our 47 speakers, 8 don’t state anywhere on the official page whether the listed price buys one speaker or a pair. Retailer listings are far worse, and they compound it: while auditing prices we removed 23 offers where the listed price covered a different quantity than the maker’s page implied.

We learned this the embarrassing way. Early on, our own site briefly showed a $5,192 total for a speaker set that actually costs $699 a pair, because a retailer listing had doubled an already doubled price and our tracker believed it. We fixed ours and now audit every speaker’s sale unit by hand. Most price sites have never done that pass, and the doubled listings are still out there.

5. Theater seating specs are the emptiest of all

We tried to catalog 29 home theater seating models. Only 16 survived our listing bar, which asks for four numbers any buyer needs: per-seat width, reclined depth, recline type, and per-seat weight capacity. Thirteen models are held back because their makers won’t publish enough to compare them.

The recurring trick: publishing total width, arms included, and nothing else. One recliner we track has a 23.5 inch seat inside a 34.5 inch chair. If you planned a three-seat row off the wrong number, that’s a 33 inch mistake. Missing dimensions like reclined depth, the number that decides whether your back row physically reclines, are a big part of why those thirteen models didn’t make the bar.

6. Silence is not a no

The deepest problem isn’t any single blank. It’s that a blank is ambiguous. Sometimes “no VRR listed” means no VRR. Sometimes it means the copywriter didn’t bother. A buyer can’t tell the difference, which is why we store absence as “unstated” instead of “no,” and why our compatibility checker reports “we can’t verify this” instead of guessing.

Across 327 listed products, the pattern is consistent: makers publish the numbers that flatter and omit the numbers that decide. The fix isn’t more marketing. It’s boring: state the measurement method, state the port count, state what the price buys. Until then, the blanks are the most informative spec on the sheet.