In this review, we will be comparing Thetis 340 and Nero DueVoce DualX8, two Powered Subwoofer speakers from Triangle and OSD. 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 Triangle Thetis 340 and OSD Nero DueVoce DualX8 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 Triangle Thetis 340and OSD Nero DueVoce DualX8 have a single woofer setup however the Triangle Thetis 340's woofer is 10-inch whereas the OSD Nero DueVoce DualX8 features a 8-inch woofer.
Frequency Response
Thetis 340 has a frequency range of 25-120 Hz whereas Nero DueVoce DualX8 has a frequency range of 17-165 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 Thetis 340's min frequency of 25Hz.
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 Triangle Thetis 340's and OSD Nero DueVoce DualX8's external dimensions. Triangle Thetis 340 has external dimensions of 380.0 x 340.0 x 340.0mm (14-15/16 x 13-3/8 x 13-3/8inch) whereas OSD Nero DueVoce DualX8 has external dimensions of 311.2 x 265.1 x 333.4mm ().
Triangle Thetis 340 is clearly the larger of the two speakers. Its body is 74.9mm wider, 68.8mm taller and 6.6mm 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.
Triangle Thetis 340 needs about 31% more floor or shelf area. Triangle Thetis 340 is 69mm 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 Triangle Thetis 340 is approximately 1156.0cm2 / 179.2inch2 and base area of the OSD Nero DueVoce DualX8 is approximately 883.8cm2 / 137.0inch2. The Thetis 340 requires 31% more surface area than the Nero DueVoce DualX8 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 Triangle Thetis 340 weighs 16.10kg / 35.4lbs and the OSD Nero DueVoce DualX8 weighs 7.80kg / 17.2lbs. This makes the Thetis 340 106% heavier than the Nero DueVoce DualX8.
Here is a comparison of how Thetis 340 and Nero DueVoce DualX8's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
10 inches
vs
8 inches
|
Larger woofer |
| Low Frequency Response |
17 Hz
vs
25 Hz
|
Generates deeper bass |
 High Frequency Response |
165 Hz
vs
120 Hz
|
Generates higher frequency |
 Height |
311mm
vs
380mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
883cm2
vs
1156cm2
|
Takes less floor space |
 Price per pair* |
300USD
vs
825USD
|
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.
Triangle Thetis 340 needs about 31% more floor area. Triangle Thetis 340 is 69mm taller.
| General |
Triangle Thetis 340 |
OSD Nero DueVoce DualX8 |
| Brand |
Triangle |
OSD |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
25-120 Hz |
17-165 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
250-watt RMS |
130-watt RMS |
| Watts Peak (Max) |
400-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
8" |
| Woofer Composition |
Paper composite |
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
Physical Specs |
|
|
| Height |
380.0mm (15") |
311.2mm (12.3") |
| Width |
340.0mm (13.4") |
265.1mm (10.4") |
| Depth |
340.0mm (13.4") |
333.4mm (13.1") |
| Weight |
16.10kg (35.4lbs) |
7.80kg (17.2lbs) |
| Enclosure |
Bass Reflex |
|
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |
A ported subwoofer against a passive radiator 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 | B | OSD Nero DueVoce DualX8 goes deeper - 17Hz against 25Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | Triangle Thetis 340 has the bigger amplifier - 250W against 130W RMS, about 2.8dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | Triangle Thetis 340 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 | Triangle Thetis 340 is ported - a ported box gives more output low down for its size, at the cost of a steeper roll-off below tuning; OSD Nero DueVoce DualX8 is passive radiator - a passive radiator behaves like a port without the pipe noise, and suits a slim cabinet. 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 37% 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. |
| Warranty | A | Triangle Thetis 340 carries 5 years on parts against 2 years. A subwoofer amplifier works harder than anything else in the system, so this is not a throwaway line. |
| Price | B | OSD Nero DueVoce DualX8 costs less - $300 against $825, about 64% less. |
A Triangle Thetis 340 B OSD Nero DueVoce DualX8
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: Triangle Thetis 340 measures better, OSD Nero DueVoce DualX8 costs about 64% 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 $300 each, two OSD Nero DueVoce DualX8 cost about $600 against $825 for one of the other, which is worth a thought. 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.