In this review, we will be comparing S400 MKII and 705 S2, two Passive Bookshelf speakers from Buchardt and Bowers Wilkins. Let's have a brief look at the main features
of Buchardt S400 MKII and B&W 705 S2 first before getting into our more
detailed comparison.
What size room are the Buchardt S400 MKII and B&W 705 S2 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:
In the following sections, we will get into more detail in order to better understand how the Buchardt S400 MKII and B&W 705 S2 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both S400 MKII and 705 S2 are 2-way speakers.
| Driver |
Buchardt S400 MKII |
B&W 705 S2 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.74-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6-inch
|
1 x 6.5-inch
|
S400 MKII features a 0.74" fine weave soft fabric textile aluminum waveguide Tweeter and 1 x 6" paper Woofer with a Crossover frequency at 1800Hz. On the other hand, the 705 S2 features a 1" Solid Body Soft-Dome Tweeter and 1 x 6.5" Continuum Woofer .
Frequency Response
S400 MKII has a frequency range of 33-40k HZ whereas 705 S2 has a frequency range of 50-28k Hz. With a minimum frequency of 33Hz, the S400 MKII can go significantly deeper on the low side and provide stronger bass compared to the 705 S2's min frequency of 50Hz.
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 Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
S400 MKII is a 4 ohms speaker compared to the 705 S2 which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the S400 MKII can provide this impedance level.
On the other hand, they have the same sensitivity of 88 dBdB.
Sensitivity
Bookshelf Speakers
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.
S400 MKII can handle a max power of 200 watts RMS from the amp the whereas 705 S2 has a max power handling value of 120 watts RMS, 80 watts less than the S400 MKII.
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.
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 Buchardt S400 MKII's and B&W 705 S2's external dimensions. Buchardt S400 MKII has external dimensions of 365.0 x 180.0 x 280.0mm ( 14.4 x 7 x 11inch) whereas B&W 705 S2 has external dimensions of 407.0 x 200.0 x 301.0mm ( 16-inch x 7.8-inch x 11.9-inch) .
B&W 705 S2 is clearly the larger of the two speakers. Its body is 20mm wider, 42mm taller and 21mm deeper than Buchardt S400 MKII.
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 Buchardt S400 MKII is approximately 504.0cm2 / 78.1inch2 and base area of the B&W 705 S2 is approximately 602.0cm2 / 93.3inch2. The S400 MKII requires 16% less surface area than the 705 S2 which gives it a small advantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The Buchardt S400 MKII weighs 7.50kg / 16.5lbs and the B&W 705 S2 weighs 9.32kg / 20.5lbs. This makes the 705 S2 24% heavier than the S400 MKII.
Here is a comparison of how S400 MKII and 705 S2's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of B&W 705 S2?
Here are the items that come with the 705 S2:
2 Bookshelf loudspeakers2 Grilles2 Two-piece foam port plugs8 Self-adhesive rubber feet4 Jumper-straps Manual Bowers & Wilkins brochureWarranty Information
 Max Input Power |
200 watts
vs
120 watts
|
Handle more power from your amplifier |
 Low Frequency Response |
33 Hz
vs
50 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
28k Hz
|
Generates higher frequency |
 Passive Radiator |
one 5x8-inch
vs
None
|
Increases the bass performance |
 Height |
365mm
vs
407mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
504cm2 (180x280mm)
vs
602cm2 (200x301mm)
|
Takes less floor space |
 Price per pair* |
2200USD
vs
3299USD
|
costs less (*prices may change depending on the seller, location and time) |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
| Woofer Size |
6.5 inches
vs
6 inches
|
Larger woofer |
| General |
Buchardt S400 MKII |
Bowers & Wilkins 705 S2 |
| Brand |
Buchardt |
Bowers Wilkins |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
40-200 watts |
30-120 watts |
| Sensitivity |
88 dB |
88 dB |
| Impedance |
4 ohms |
8 ohms |
| Impedance |
n/a |
3.1 ohms |
| Frequency Response |
33-40k HZ |
50-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6" |
6.5" |
| Woofer Composition |
paper |
Continuum |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
0.74" |
1" |
| Tweeter Type |
aluminum waveguide |
Solid Body Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
1800Hz |
n/a |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
365.0mm (14.4") |
407.0mm (16") |
| Width |
180.0mm (7.1") |
200.0mm (7.9") |
| Depth |
280.0mm (11") |
301.0mm (11.9") |
| Weight |
7.50kg (16.5lbs) |
9.32kg (20.5lbs) |
| Enclosure |
Passive Radiator |
Bass Reflex |
| Finish |
n/a |
MDF/Wood veneer |
| Available Colors |
Black, White, Walnut, Rosewood, Light Oak |
Rosewood, Gloss Black, Satin White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
24-26" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
n/a |
Yes |
Other |
|
|
| Parts Warranty |
10 years |
5 Years |
| Labor Warranty |
10 years |
5 Years |