In this review, we will be comparing Sandwich 250 and Mission 770, two Passive Bookshelf speakers from Leak and Mission. Let's have a brief look at the main features
of Leak Sandwich 250 and Mission 770 first before getting into our more
detailed comparison.
Leak Sandwich 250 Key Specs
- 3-way Design
- 1.2" Dome Tweeter
- 4.25" Midrange
- 11" Aluminium-Foamcore Sandwich cone Woofer
- 42Hz-26kHz Frequency Response
- 88.5 dB Sensitivity
- Impedance: 4ohms
- Power Range:25-250watts
- Weight:27.30kg
- Dimensions (H x W x D): 655.0" x 14.6" x 11.8"( 655 x 370 x 300 mm )
Mission 770 Key Specs
- 2-way Design
- 1.25" Soft-Dome Tweeter
- 8" mineral-loaded polyproylene Woofer
- 42-20,000 Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 8ohms
- Power Range:25-200watts
- Weight:27.20kg
- Dimensions (H x W x D): 590.0" x 11-13/16" x 12-11/16"( 590 x 279.4 x 301mm )
What size room are the Leak Sandwich 250 and Mission 770 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:
| Listening Environment* |
Leak Sandwich 250 |
Mission 770 |
| Near-field |
Poor |
Poor |
| Small Room |
Poor |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Good |
Average |
| Very Large Room |
Average |
Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
In the following sections, we will get into more detail in order to better understand how the Leak Sandwich 250 and Mission 770 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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Drivers
One of the fundamental differences between these two speakers is that Sandwich 250 is a 3-way design whereas the Mission 770 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
Leak Sandwich 250 |
Mission 770 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1.2-inch
|
1.25-inch
|
|
Midrange
|
1 x 4.25-inch |
- |
|
Woofer
|
1 x 11-inch
|
1 x 8-inch
|
Sandwich 250 features a 1.2" Coated Textile Dome Tweeter , a 4.25" Midrange and 1 x 11" Aluminium-Foamcore Sandwich cone Woofer with a Crossover frequency at 470Hz and 3100Hz. On the other hand, the Mission 770 features a 1.25" Soft-Dome Tweeter and 1 x 8" mineral-loaded polyproylene Woofer with a Crossover frequency at 2900Hz.
Frequency Response
Sandwich 250 has a frequency range of 42Hz-26kHz whereas Mission 770 has a frequency range of 42-20,000 Hz.
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
Sandwich 250 is a 4 ohms speaker compared to the Mission 770 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 Sandwich 250 can provide this impedance level.
These two speakers also have different sensitivity levels. Sandwich 250 sensitivity is rated at 88.5 dB and the Mission 770's is rated at 88 dB. This 1 dB difference makes the Leak Sandwich 250 a more sensitive speaker compared to Mission 770, hence will play louder with the same amount of watts.
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.
Sandwich 250 can handle a max power of 250 watts RMS from the amp the whereas Mission 770 has a max power handling value of 200 watts RMS, 50 watts less than the Sandwich 250.
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.
Input Type and Bi-Amping / Bi-Wiring
Sandwich 250 features Post type posts and Mission 770 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
Leak Sandwich 250's Binding post terminals
Mission 770's Post terminals
Cabinet Type and Port Position
Sandwich 250 has a rear firing port whereas Mission 770 has a Front firing ports.
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 Leak Sandwich 250's and Mission 770's external dimensions. Leak Sandwich 250 has external dimensions of 655 x 370 x 300 mm ( 25.8 x 14.6 x 11.8 inch) whereas Mission 770 has external dimensions of 590 x 279.4 x 301mm ( 23-1/4inch x 11-13/16inch x 12-11/16inch ) .
Mission 770 is 90.6mm narrower and 65mm shorter than Leak Sandwich 250 but it is also 1mm deeper.
Below you can see the front view size comparison of Leak Sandwich 250 and Mission 770 in scale.
Comparison image of Leak Sandwich 250 and Mission 770 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 Leak Sandwich 250 is approximately 1110.0cm2 / 172.1inch2 and base area of the Mission 770 is approximately 841.0cm2 / 130.4inch2. The Sandwich 250 requires 32% more surface area than the Mission 770 which gives it a small disadvantage 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 Leak Sandwich 250 weighs 27.30kg / 60.1lbs and the Mission 770 weighs 27.20kg / 59.8lbs. This makes the Sandwich 250 0% heavier than the Mission 770.
Here is a comparison of how Sandwich 250 and Mission 770's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Mission 770?
Here are the items that come with the Mission 770:
Mission M770 Speaker: 2 Stand-mount loudspeakers 2 Grilles User Manual Mission M770 Stand: 2 Top-plates 2 Bases 8 Upright posts 8 Spike feet Hardware Instructions