Short answer: the Triad In-Room Gold LCR, though neither ranks well in its class. It ranks #203 of 222 bookshelf speakers by sound quality, rated 2.7/5, at $6,600. The ATC SCM19 ranks #209, rated 2.4/5, at $3,750, $2,850 cheaper, not enough of a saving to outweigh the sound-quality gap. Both are rated below 3.0/5 among the 222 bookshelf speakers, so if sound quality matters, consider the Perlisten S4b instead, ranked #2 at $8,000.
The Triad In-Room Gold LCR is the better-sounding option. A sealed three way home theater speaker with dual 8.5 inch woofers, very low distortion at high volume and broad coverage. The catch: At $6600/pair, Erin found the raw response and value hard to defend without EQ: a 100-300Hz dip makes male vocals thin, a 1kHz dip adds hollowness, and a 4-5kHz rise makes sibilants harsh.
The ATC SCM19 is the more accurate pick. A heavy, sealed pro style ATC bookshelf speaker with a very dense cabinet and low distortion at high volume. Its measured preference score, a predictor of how neutral it sounds, is 4.61 against 4.04 for the Triad In-Room Gold LCR. Watch for: Some stored energy resonance around 500-700Hz, 4dB bump around 700Hz.
Buy the Triad In-Room Gold LCR. It is rated higher for sound quality, and saving $2,850 with the ATC SCM19 does not make up for the sound-quality gap.
Still deciding? The full Passive Home rankings cover every ranked option.
Measured Differences
- Bass depth: the ATC SCM19 reaches 34 Hz (10 dB down) against 40 Hz for the Triad In-Room Gold LCR, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Tonal accuracy above the bass: with a subwoofer taking the low end, the ATC SCM19 scores 7.0 against 6.4 for the Triad In-Room Gold LCR on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
- Efficiency: the Triad In-Room Gold LCR is rated at 88.9 dB sensitivity against 85 dB for the ATC SCM19, so it plays as loud with roughly half the amplifier power.
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Specifications Side By Side
| Triad In-Room Gold LCR | ATC SCM19 | |
|---|---|---|
| Price | $6,600 per pair | $3750 per pair |
| Ranked | #203 of 222 in Large Size Bookshelf Speakers | #209 of 222 in Large Size Bookshelf Speakers |
| Drivers | Two 8.5” metal woofers, 5.5” paper/fiber midrange, 1” fabric-dome tweeter | 5.9” Super Linear Magnet cone woofer, 1” soft dome tweeter |
| Dimensions | 29”H x 10.75”W x 11.375”D | 17.2”H x 10.4”W x 11.8”D (436.9 x 264.2 x 299.7 mm) |
| Weight | 54.9 lbs (24.9 kg) each | 39.2 lbs (17.8 kg) each |
| Impedance | 4 ohms nominal; dips below 3 ohms (measured, Erin’s Audio Corner) | 6 ohms |
| Sensitivity | 88.9dB (2.83V/1m, measured, Erin’s Audio Corner; 92dB manufacturer specified) | 85dB (measured, Audio Science Review) |
| Bass Extension (-3dB) | 57Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 40Hz (measured, Erin’s Audio Corner) | 34Hz (measured, Audio Science Review) |
| Power Handling | 100W - 450W recommended (manufacturer specified) | - |
| Frequency Response | 50Hz - 20kHz +/-3dB (manufacturer specified) | - |
| Woofer Cabinet | sealed / acoustic suspension | sealed |
| Country | USA (handcrafted, manufacturer specified) | - |
| Spinorama Preference Score | 4.04 | 4.61 |
| Spinorama Preference Score with Perfect Sub | 6.41 | 7.03 |
| DIY Kit | No | No |
Where the Ratings Come From
- Triad In-Room Gold LCR: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- ATC SCM19: Spinorama.org measurements and reviews by Audio Science Review.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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