In this review, we will be comparing Nero DueVoce DualX8 and SA-CS9, two Powered Subwoofer speakers from OSD and Sony. 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 OSD Nero DueVoce DualX8 and Sony SA-CS9 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.Both OSD Nero DueVoce DualX8and Sony SA-CS9 have a single woofer setup however the OSD Nero DueVoce DualX8's woofer is 8-inch whereas the Sony SA-CS9 features a 10-inch woofer.
Frequency Response
Nero DueVoce DualX8 has a frequency range of 17-165 Hz whereas SA-CS9 has a frequency range of 28-200 Hz. With a minimum frequency of 17Hz, the Nero DueVoce DualX8 can go significantly deeper on the low side and provide stronger bass compared to the SA-CS9's min frequency of 28Hz.
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 OSD Nero DueVoce DualX8's and Sony SA-CS9's external dimensions. OSD Nero DueVoce DualX8 has external dimensions of 311.2 x 265.1 x 333.4mm () whereas Sony SA-CS9 has external dimensions of 345.0 x 295.0 x 400.0mm (11.6 x 13.6 x 15.7 inch).
Sony SA-CS9 is clearly the larger of the two speakers. Its body is 29.9mm wider, 33.8mm taller and 66.6mm deeper than OSD Nero DueVoce DualX8.
Size, drawn to scale
Both speakers 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 surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Sony SA-CS9 needs about 34% more floor or shelf area. Sony SA-CS9 is 67mm deeper, so it stands that much further out from the wall. Sony SA-CS9 is 34mm taller.
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 OSD Nero DueVoce DualX8 is approximately 883.8cm2 / 137.0inch2 and base area of the Sony SA-CS9 is approximately 1180.0cm2 / 182.9inch2. The Nero DueVoce DualX8 requires 25% less surface area than the SA-CS9 which gives it a small advantage 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 OSD Nero DueVoce DualX8 weighs 7.80kg / 17.2lbs and the Sony SA-CS9 weighs 11.50kg / 25.3lbs. This makes the SA-CS9 47% heavier than the Nero DueVoce DualX8.
Here is a comparison of how Nero DueVoce DualX8 and SA-CS9's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Low Frequency Response |
17 Hz
vs
28 Hz
|
Generates deeper bass |
 Height |
311mm
vs
345mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
883cm2
vs
1180cm2
|
Takes less floor space |
| Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
 High Frequency Response |
200 Hz
vs
165 Hz
|
Generates higher frequency |
 Price per pair* |
248USD
vs
300USD
|
costs less (*prices may change depending on the seller, location and time) |
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.
Sony SA-CS9 needs about 34% more floor area. Sony SA-CS9 stands 67mm further into the room. Sony SA-CS9 is 34mm taller.
| General |
OSD Nero DueVoce DualX8 |
Sony SA-CS9 |
| Brand |
OSD |
Sony |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
17-165 Hz |
28-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
130-watt RMS |
115-watt RMS |
| Watts Peak (Max) |
300-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
10" |
| Woofer Composition |
|
foamed-mica cellular reinforced |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
311.2mm (12.3") |
345.0mm (13.6") |
| Width |
265.1mm (10.4") |
295.0mm (11.6") |
| Depth |
333.4mm (13.1") |
400.0mm (15.7") |
| Weight |
7.80kg (17.2lbs) |
11.50kg (25.3lbs) |
| Enclosure |
|
Bass Reflex |
| Available Colors |
n/a |
Black |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
|
| Labor Warranty |
2 Years |
|
A passive radiator subwoofer against a ported one. That is the most consequential line on this page: it decides how the bass rolls off, how it behaves in a small room, and how much output you get for the size of the box.
| Area | Better | Why |
|---|
| Bass depth | A | OSD Nero DueVoce DualX8 goes deeper - 17Hz against 28Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | evenly matched | Much the same amplifier (130W vs 115W RMS) - under 1dB apart. |
| Driver area | B | Sony SA-CS9 moves more air: 10" against 8" is 1.56x the cone area, not the 1.25x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | depends | OSD Nero DueVoce DualX8 is passive radiator - a passive radiator behaves like a port without the pipe noise, and suits a slim cabinet; Sony SA-CS9 is ported - a ported box gives more output low down for its size, at the cost of a steeper roll-off below tuning. Neither is better in the abstract; ported tends to suit films and sealed tends to suit music, and both generalisations have exceptions. |
| Cabinet size | depends | OSD Nero DueVoce DualX8 is about 32% 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 | B | Sony SA-CS9 costs less - $248 against $300, about 17% less. |
A OSD Nero DueVoce DualX8 B Sony SA-CS9
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?
Neither runs away with it - they trade advantages. Let your room size and where the box can actually stand settle it. If placement is the constraint - a corner, behind a sofa, under a desk - OSD Nero DueVoce DualX8 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.