In this review, we will be comparing Varro RS700-SB and Varro PS250-BK, two Powered Subwoofer speakers by ELAC. 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 ELAC Varro RS700-SB and ELAC Varro PS250-BK 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.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both ELAC Varro RS700-SBand ELAC Varro PS250-BK have a single woofer setup however the ELAC Varro RS700-SB's woofer is 12-inch whereas the ELAC Varro PS250-BK features a 10-inch woofer.
Frequency Response
Varro RS700-SB has a frequency range of 17-150 Hz whereas Varro PS250-BK has a frequency range of 27-150 Hz. With a minimum frequency of 17Hz, the Varro RS700-SB can go significantly deeper on the low side and provide stronger bass compared to the Varro PS250-BK'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
Cabinet Type
The ELAC Varro RS700-SB has a Acoustic Suspension type cabinet. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs. On the other hand the ELAC Varro PS250-BK have Bass Reflex type enclosure. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
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 ELAC Varro RS700-SB's and ELAC Varro PS250-BK's external dimensions. ELAC Varro RS700-SB has external dimensions of 439.0 x 418.0 x 420.0mm (17-1/4inch x 16-7/16inch x 16-1/2inch) whereas ELAC Varro PS250-BK has external dimensions of 381.0 x 361.0 x 361.0mm (15inch x 14-3/16inch x 14-3/16inch).
ELAC Varro RS700-SB is clearly the larger of the two speakers. Its body is 57mm wider, 58mm taller and 59mm deeper than ELAC Varro PS250-BK.
Below you can see the front view size comparison of ELAC Varro RS700-SB and ELAC Varro PS250-BK in scale.
Comparison image of ELAC Varro RS700-SB and ELAC Varro PS250-BK Size and External Dimensions
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 ELAC Varro RS700-SB is approximately 1755.6cm2 / 272.1inch2 and base area of the ELAC Varro PS250-BK is approximately 1303.2cm2 / 202.0inch2. The Varro RS700-SB requires 35% more surface area than the Varro PS250-BK 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 ELAC Varro RS700-SB weighs 25.35kg / 55.8lbs and the ELAC Varro PS250-BK weighs 16.44kg / 36.2lbs. This makes the Varro RS700-SB 54% heavier than the Varro PS250-BK.
Here is a comparison of how Varro RS700-SB and Varro PS250-BK's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of ELAC Varro RS700-SB?
Here are the items that are included inside the box of Varro RS700-SB:
- Grill
- Power Cord
- 4 Spikes
What's in the Box of ELAC Varro PS250-BK?
Here are the items that come with the Varro PS250-BK:
- Grill
- Power Cord
- 4 Spikes
 Woofer Size |
12 inches
vs
10 inches
|
Larger woofer |
| Low Frequency Response |
17 Hz
vs
27 Hz
|
Generates deeper bass |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
 Height |
381mm
vs
439mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1303cm2
vs
1755cm2
|
Takes less floor space |
 Price per pair* |
649USD
vs
1499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
ELAC Varro RS700-SB |
ELAC Varro PS250-BK |
| Brand |
ELAC |
ELAC |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
700 watts |
250 watts |
| Frequency Response |
17-150 Hz |
27-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
700-watt RMS |
250-watt RMS |
| Watts Peak (Max) |
1400-watt RMS |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
12" |
10" |
| Woofer Composition |
Aluminum |
Treated paper |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
bottom |
Physical Specs |
|
|
| Height |
439.0mm (17.3") |
381.0mm (15") |
| Width |
418.0mm (16.5") |
361.0mm (14.2") |
| Depth |
420.0mm (16.5") |
361.0mm (14.2") |
| Weight |
25.35kg (55.8lbs) |
16.44kg (36.2lbs) |
| Enclosure |
Acoustic Suspension |
Bass Reflex |
| Finish |
MDF |
MDF |
| Available Colors |
Gloss Black |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| USB Port |
USB-A port for firmware updates |
USB-A port for firmware updates |
| Ethernet Port |
Yes |
n/a |
Other |
|
|
| Parts Warranty |
1 year |
1 year |
| Labor Warranty |
1 year |
1 year |
A sealed 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 | ELAC Varro RS700-SB goes deeper - 17Hz against 27Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | ELAC Varro RS700-SB has the bigger amplifier - 700W against 250W RMS, about 4.5dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | ELAC Varro RS700-SB moves more air: 12" against 10" is 1.44x the cone area, not the 1.2x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | depends | ELAC Varro RS700-SB is sealed - a sealed box rolls off gently and is usually the easier one to integrate in a small or awkward room; ELAC Varro PS250-BK 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. |
| Setup and tuning | evenly matched | The same tuning tools on both (room correction, onboard DSP and app control). |
| Speaker-level inputs | A | ELAC Varro RS700-SB takes a speaker-level connection as well as line level. That is what lets it work with an integrated amplifier or a vintage receiver that has no subwoofer output at all. |
| Wireless option | depends | Only ELAC Varro RS700-SB offers a wireless link (as a paid option). It decides where the sub can go if you cannot run a cable, and is worth nothing if you can. |
| Driver placement | depends | ELAC Varro RS700-SB fires front and ELAC Varro PS250-BK fires down. A down-firing driver is more forgiving of a grille-less look and of a hard floor; a front-firing one is the safer choice on a thick carpet or a suspended timber floor. |
| Cabinet size | depends | ELAC Varro PS250-BK is about 36% 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 | ELAC Varro PS250-BK costs less - $649 against $1,499, about 57% less. |
A ELAC Varro RS700-SB B ELAC Varro PS250-BK
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: ELAC Varro RS700-SB measures better, ELAC Varro PS250-BK costs about 57% less. In a normal room, placement will make a bigger difference than the gap between these two. Films or music? If this is mainly a home cinema, ELAC Varro PS250-BK will hit harder for the money; if it is mainly for music in a normal-sized room, ELAC Varro RS700-SB is usually the easier one to make sound right. Check your amplifier first: if it has no subwoofer or preamp output, ELAC Varro RS700-SB is the only one of these two you can connect at all.
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.