In this review, we will be comparing IW Sub Reference and B28W, two Passive In-wall speakers from Definitive Technology and Revel.
Let's have a brief look at the main features
of Definitive IW Sub Reference and Revel B28W first before getting into our more
detailed comparison.
Definitive IW Sub Reference Key Specs
- 1-way Design
- " Tweeter
- 13" Not given Woofer
- 14-200Hz Frequency Response
- Impedance: 4ohms
- Power Range:up to 275watts
- Dimensions (H x W x D): 639.0" x 14.3750" x 4.0000"( 639.0 x 366.0 x 102.0mm )
Revel B28W Key Specs
- 1-way Design
- " Tweeter
- 2 x 8" Polymer-coated aluminum Woofer
- 36-150Hz Frequency Response
- 0 dB Sensitivity
- Impedance: 8ohms
- Power Range:350watts
- Dimensions (H x W x D): 597.0" x 14.5000" x 4.0000"( 597.0 x 369.0 x 102.0mm )
What size room are the Definitive IW Sub Reference and Revel B28W speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
Definitive IW Sub Reference |
Revel B28W |
| Near-field |
Poor |
Are you nuts? |
| Small Room |
Poor |
Bad |
| Mid-size Room |
Good |
Poor |
| Large Room |
Good |
Good |
| Very Large Room |
Average |
Good |
(* 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.)
In the following sections, we will get into more detail in order to better understand how the Definitive IW Sub Reference and Revel B28W compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both IW Sub Reference and B28W are 1-way speakers.
| Driver |
Definitive IW Sub Reference |
Revel B28W |
|
Driver Setup
|
1-way
|
1-way
|
|
Tweeter
|
-inch
|
-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 13-inch
|
2 x 8-inch
|
IW Sub Reference features a " Tweeter and 1 x 13" Not given Woofer . On the other hand, the B28W features a " Tweeter and 2 x 8" Polymer-coated aluminum Woofer .
Frequency Response
IW Sub Reference has a frequency range of 14-200Hz whereas B28W has a frequency range of 36-150Hz. With a minimum frequency of 14Hz, the IW Sub Reference can go significantly deeper on the low side and provide stronger bass compared to the B28W's min frequency of 36Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the In-wall class in our database.
Low Frequency
In-wall Speakers
High Frequency
In-wall Speakers
Definitive IW Sub Reference
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using
an amplifier within this range ensures the nominal performance , inputting a power that is higher than the
max wattage can result in a damaged speaker.
IW Sub Reference can handle a max power of 350 watts RMS from the amp the whereas IW Sub Reference has a max power handling value of 275 watts RMS , 75 watts less than the B28W.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
IW Sub Reference features Spring post type posts and B28W has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.
Physical Specs
Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Definitive IW Sub Reference's and Revel B28W's external dimensions. Definitive IW Sub Reference has external dimensions of 639.0 x 366.0 x 102.0mm ( 25.1250-inch x 14.3750-inch x 4.0000-inch) whereas Revel B28W has external dimensions of 597.0 x 369.0 x 102.0mm ( 23.5000-inch x 14.5000-inch x 4.0000-inch) .
What's in the Box of Definitive IW Sub Reference?
Here are the items that are included inside the box of IW Sub Reference:
In-wall subwooferGrille (attached)4 Long self-adhesive foam gaskets3 Short self-adhesive foam gaskets8 ScrewsWall-templatePaint maskOwners ManualOnline Product Registration card
What's in the Box of Revel B28W?
Here are the items that come with the B28W:
In-wall subwooferGrille8 Screws8 Washers8 IsolatorsOwners Manual