In this review, we will be comparing AMBEO Sub and KC62, two Powered Subwoofer speakers from Sennheiser and KEF. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of Sennheiser AMBEO Sub and KEF KC62 first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Sennheiser AMBEO Sub and KEF KC62 have a totally different setup: the Sennheiser AMBEO Sub features 1 x 8-inch drivers whereas the KC62 features 2 x 6.5-inch drivers.
Frequency Response
AMBEO Sub has a frequency range of 27-80 Hz whereas KC62 has a frequency range of 11-200 Hz. With a minimum frequency of 11Hz, the KC62 can go significantly deeper on the low side and provide stronger bass compared to the AMBEO Sub's min frequency of 27Hz.
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 Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
High Frequency
Subwoofer Speakers
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Sennheiser AMBEO Sub's and KEF KC62's external dimensions. Sennheiser AMBEO Sub has external dimensions of 366.7 x 269.9 x 269.9mm () whereas KEF KC62 has external dimensions of 245.0 x 258.0 x 281.0mm (9-5/8inch x 10-1/8inch x 11-1/16inch).
KEF KC62 is 11.9mm narrower and 121.7mm shorter than Sennheiser AMBEO Sub but it is also 11.1mm deeper.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the Sennheiser AMBEO Sub is approximately 728.5cm2 / 112.9inch2 and base area of the KEF KC62 is approximately 725.0cm2 / 112.4inch2. The AMBEO Sub requires 0% more surface area than the KC62 which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The Sennheiser AMBEO Sub weighs 8.16kg / 18lbs and the KEF KC62 weighs 14.05kg / 30.9lbs. This makes the KC62 72% heavier than the AMBEO Sub.
Here is a comparison of how AMBEO Sub and KC62's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
8 inches
vs
6.5 inches
|
Larger woofer |
 Price per pair* |
500USD
vs
1500USD
|
costs less (*prices may change depending on the seller, location and time) |
| Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
27 Hz
|
Generates deeper bass |
 High Frequency Response |
200 Hz
vs
80 Hz
|
Generates higher frequency |
 Height |
245mm
vs
366mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
728cm2
|
Takes less floor space |
Size, drawn to scale
Both subwoofers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same floor and pushed back to the same wall, so the bigger one visibly takes more of the room.
Near-identical footprints. Sennheiser AMBEO Sub is 122mm taller.
| General |
Sennheiser AMBEO Sub |
KEF KC62 |
| Brand |
Sennheiser |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
27-80 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
350-watt RMS |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
8" |
6.5" |
| Woofer Composition |
|
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
366.7mm (14.4") |
245.0mm (9.6") |
| Width |
269.9mm (10.6") |
258.0mm (10.2") |
| Depth |
269.9mm (10.6") |
281.0mm (11.1") |
| Weight |
8.16kg (18lbs) |
14.05kg (30.9lbs) |
| Enclosure |
|
Acoustic Suspension |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
2 Years |
| Labor Warranty |
2 Years |
2 Years |
Different price classes - KEF KC62 costs roughly 3x what Sennheiser AMBEO Sub does. Before paying it, read the note below about two smaller subwoofers.
| Area | Better | Why |
|---|
| Bass depth | B | KEF KC62 goes deeper - 11Hz against 27Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | B | KEF KC62 has the bigger amplifier - 1000W against 350W RMS, about 4.6dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | B | KEF KC62 moves more air: 2 x 6.5" against 8" is 1.32x the cone area, not the 1.15x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | evenly matched | Both are sealed designs, so they roll off in much the same way. |
| Cabinet size | depends | KEF KC62 is about 34% smaller by volume. In a subwoofer that is a real trade rather than a preference: box volume is how you get output low down without a bigger amplifier. |
| Price | A | Sennheiser AMBEO Sub costs less - $500 against $1,500, about 67% less. |
A Sennheiser AMBEO Sub B KEF KC62
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both subwoofers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
The usual trade-off: KEF KC62 measures better, Sennheiser AMBEO Sub costs about 67% less. In a normal room, placement will make a bigger difference than the gap between these two. Two small subwoofers beat one big one in most rooms - a pair evens out the room modes in a way no single box can, whatever its specs. At $500 each, two Sennheiser AMBEO Sub cost about $1,000 against $1,500 for one of the other, which is worth a thought. If placement is the constraint - a corner, behind a sofa, under a desk - KEF KC62 is the one that will actually go there, and a well-placed small subwoofer beats a badly-placed big one every time.
One thing outweighs everything above: where the subwoofer stands. Room modes can add or remove 10dB or more at a given seat, which is far larger than any difference on this page. Before spending more, try the sub in two or three positions - the crawl test, where you put it in the listening seat and crawl the room to find where the bass sounds best, costs nothing and usually beats an upgrade.