ATC SCM20PSL is a 2-way Passive Sealed Bookshelf speaker by ATC. It was released in 2018. It features a Tweeter and 1 x " Woofer. ATC lists the drivers as 1 x 150mm/6", SB75-150SL 8Ω; 1 x 25mm/1", SH25-76S 6Ω. The speaker has a frequency range of 55-25k Hz and a sensitivity of 85 dB. ATC SCM20PSL has an MSRP of 6499$ per pair.
Room Size Suitability
The size of the room where you plan to use the ATC SCM20PSL is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Good |
| Small Room | Good |
| Mid-size Room | Average |
| Large Room | Poor |
| Very Large Room | No way |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
Frequency Response of the ATC SCM20PSL Speaker
ATC SCM20PSL has a Frequency response range of 55-25k Hz and Power Range of 75W-300W watts. With a minimum frequency of 55 Hz, SCM20PSL delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.
Here we have a comparison of how SCM20PSL's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Bookshelf Speakers
Thinking about a subwoofer for the ATC SCM20PSL?
Among the speakers in our database priced under $10,000 a pair, these are the 5 Passive Bookshelf speakers that have deeper bass than the ATC SCM20PSL's 55Hz:
Crossover frequency of the ATC SCM20PSL?
The crossover frequency of the SCM20PSL is set to 2.2kHz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
ATC SCM20PSL's nominal impedance level is
8 ohms but can go down to as low as
5.5 ohms, and has a sensitivity of
85 dB.
Sensitivity
Bookshelf Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so ATC SCM20PSL is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
With a sensitivity level of only 85 dB, ATC SCM20PSL is a difficult to drive speaker from Sensitivity perspective, make sure to choose an amplifier with a high output if you like listening to your music at high volume levels. You may especially have a hard time using Tube amplifiers which are traditionally very low power compared to Class A/B or Class D amps. Work out how loud the ATC SCM20PSL plays in your room →
Minimum Impedance of the ATC SCM20PSL
Even though the nominal impedance of the SCM20PSL is 8 ohms, the minimum impedance level of this speaker according to ATC is 5.5 ohms ATC SCM20PSL so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.
What amplifier does the ATC SCM20PSL need?
At normal listening levels in a medium room, about
24–300 W
per channel into 8 ohms.
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Input Type
SCM20PSL features 1 x Rear Panel Mounted Female XLR, pin 2 hot type connectors.
Work out what gauge speaker cable this run needs →
ATC SCM20PSL External Dimensions and Weight
ATC SCM20PSL has external dimensions of (Height x Width x Depth) .
Work out where they should sit in the room →
Cabinet type and Materials
ATC SCM20PSL has a
Sealed type cabinet.
Wall Mounting
SCM20PSL doesn't sport any built-in mounting bracket, so you need an external structure to mount it on walls.
Does the ATC SCM20PSL come with a Grille?
SCM20PSL comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.
Recommended Accessories
Here is a list of accessories that we think you may need for the ATC SCM20PSL.
- Speaker Cable and Connectors
- Vibration Isolators: IsoAcoustics isolators are our favorite isolators but you may find more affordable options too.
- Acoustic Panels and Treatments: Your room is as important as your stereo equipment so acoustic treatments goes a long way in improving the overall performance.
- Speaker Stands: Stands bring your bookshelf speakers to ideal height (rule of thumb is to have the tweeter level with your ear in your listening position), helps stability and acoustical isolation.
Official Product Page
Official manufacturer's product page for the ATC SCM20PSL speaker can be found below:
Official Product Page for ATC SCM20PSL