Definitive Technology DI 5.5S is a 2-way Passive In-wall In-wall speaker by Definitive Technology. It was released in 2016. It features a 1" Hard-Dome Tweeter and 1 x 5.25" Polymer Woofer. The speaker has a frequency range of 28-30kHz and a sensitivity of 89 dB. Definitive DI 5.5S has an MSRP of 558$ per pair.
Room Size Suitability
The size of the room where you plan to use the Definitive DI 5.5S 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 | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
(* 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.)
Definitive Technology's DI Series of Loudspeakers
DI 5.5S is a member of Definitive Technology's DI series of Passive speakers. The DI range are Definitive Technology's disappearing in-wall and in-ceiling custom-install speakers. Below you can see the main specs of these speakers.
See all 5 Definitive Technology DI models compared »
Definitive Technology DI Series Speakers
Frequency Response of the Definitive DI 5.5S Speaker
Definitive DI 5.5S has a Frequency response range of 28-30kHz and Power Range of 10-175 watts. With a minimum frequency of 28 Hz, DI 5.5S delivers deep bass that will likely satisfy most listeners, especially those who enjoy music. However, movie enthusiasts and music fans who prefer a full range of sound may still benefit from adding a subwoofer.
Here we have a comparison of how DI 5.5S's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
In-wall Speakers
Thinking about a subwoofer for the Definitive DI 5.5S?
Impedance and Sensitivity
Definitive DI 5.5S's nominal impedance level is
8 ohms and has a sensitivity of
89 dB.
Sensitivity
In-wall Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Definitive Technology DI 5.5S is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
89dB of the Definitive Technology DI 5.5S is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the Definitive DI 5.5S plays in your room →
What amplifier does the Definitive DI 5.5S need?
At normal listening levels in a medium room, about
9.5–150 W
per channel into 8 ohms.
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Prefer to browse? Integrated amplifiers under $750, or every amplifier we cover.
Input Type
DI 5.5S features Spring clip type connectors. Bi-amping and Bi-wiring are not possible.
Work out what gauge speaker cable this run needs →
Definitive DI 5.5S External Dimensions and Weight
Definitive DI 5.5S has external dimensions of (Height x Width x Depth) 6.3125-inch x 6.3125-inch x 3.6250-inch (161.0 x 161.0 x 93.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Definitive DI 5.5S is approximately 149.7cm2 / 23.2inch2.
Find speakers that fit your shelf or alcove →
Cabinet type and Materials
Definitive DI 5.5S has a
In-wall type cabinet.
What's in the Box of Definitive DI 5.5S?
Here are the items that are included inside the box of DI 5.5S:
Recommended Accessories
Here is a list of accessories that we think you may need for the Definitive Technology DI 5.5S.
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.