SoundSOUL 180ml Aromatherapy Essential Oil Diffuser Review

SoundSOUL 180ml Aromatherapy Essential Oil Diffuser 2


The SoundSOUL 180ml Aromatherapy Essential Oil Diffuser was kindly provided to me by SoundSOUL Direct free of charge in exchange for a fair and unbiased review on & No additional compensation was given in exchange for posting this article on my blog.

The SoundSOUL 180ml Aromatherapy Essential Oil Diffuser is available in the UK from SoundSOUL Direct Fulfilled by at a cost of £19.99 with free P&P for Amazon Prime members. In the US the SoundSOUL 180ml Aromatherapy Essential Oil Diffuser is available from SoundSOUL Audio Fulfilled by at a cost of $26.99 with free P&P.  (Prices correct at time of posting).


To enlarge an image and view its description, please click on the image.



The SoundSOUL 180ml Aromatherapy Essential Oil Diffuser is supplied within a very thin retail style cardboard box. The box is covered head to toe with product pictures, specifications and even instructions. Inside the box the contents are all individually wrapped in plastic and held in place with an equally thin card retainer. With my particular sample the box was somewhat crushed, but thankfully the contents were unaffected.

Inside the box you will find…

– The SoundSOUL diffuser.
– A good quality small plastic measuring jug (oddly the jug is only marked 20ml, 40ml, 60ml, 80ml and 100ml. Filled to the base of the pouring lip the jug actually contains 150ml of water, this is a 180ml diffuser so why no 180ml jug?)


– A wall mains power plug.
– An illustrated English instruction leaflet.



The device measures 14.5cm high at its greatest point (including feet) and 9.1cm in diameter at the base.

At the front near the base there are two buttons, on the left is the light button and on the right is the mist button, both buttons measure 11.6mm x 6.95mm and sit flush with the surface of the diffuser.


The power brick protrudes from the socket by 50.6mm and measures 74.9mm tall, although cable reinforcement protrudes by a further 15mm. The power cable measures 170cm long excluding connector and cable reinforcement sections.



The device illumination feature is controlled by a single button on the base of the device that is marked “Light”. By default the light is off and the light can be operated entirely independently of the mist function if you just want a bit of mood lighting or a nightlight without the mist function.

Pressing the light button once and the light inside the device comes on, gradually blending from one colour to another. The sequence that I noted is as follows…

Acid green > Turquoise > Mid blue > Dark blue > Purple > Lilac > White > Pink > Red > Orange > Yellow (ish) > Pale green and then the cycle starts over again.

All of these colour changes are a constant fading and blending from one colour to another and not remaining a single colour for more than a few seconds. The change from Pink >Red > Orange > Yellow however, is notably faster compared to the other colours with orange being visible for less than a second. One entire cycle timed from white to white took exactly 51 seconds.

Pressing the light button a second time will hold the colour of light shown at the time the button was pressed and the device will remain on that colour constantly.

Additional presses of the light button will manually change the light colour, selecting one of these options will leave the colour selected on constantly. The colours on offer are…

3rd press = Red
4th press = Dark orange
5th press = Pale green
6th press = Slightly darker pale green
7th press = Apple green (I think this is supposed to be yellow).
8th press = Mid green
9th press = Turquoise
10th press = A darker / dimmer turquoise.
11th press = Mid blue
12th press = Dark blue
13th press = Lilac
14th press = Purple
15th press = White
16th press = Dim white
17th press = Turns light off

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At any time if you wish to turn the light feature off regardless what setting it is on just hold the light button down for 2 to 3 seconds.



I’ve lost count of how many essential oil diffusers that I have reviewed now, although I believe it to be in the region of 20. During this time I have come to the conclusion that in terms of effectiveness they are so similar its impossible to compare one to another at least when comparing the time taken for an aroma to take hold and how long it lasts.


The truth of the matter is the oil used is far more important than the actual diffuser when it comes to the aroma. The only real difference is their size, how much water they hold, how much power they use and how loud they are in operation. As such the only things you need consider when buying a diffuser are as follows… the cost, the quality of construction, aesthetics, operational noise and power consumption.

Simply look for a diffuser that you like the look of, is in your budget and is a quiet as possible. Don’t use it on a side table next to your sofa, place it at least a couple of meters away if possible and invest in some quality oil, or better yet, try mixing your own. Anyway, rant over and on with some testing.

The manual advises that the device should be filled with “a cup of water” (we’ll assume they mean 180ml) and 0.2ml to 0.3ml of oil. Firstly, take care not to overfill the diffuser and remember the supplied jug is only a 150ml jug. The oil that I use for testing is [10ml Lavender Pure Essential Oil] and when testing diffusers with a 100ml tank I find that about 4 to 5 drops is optimal for a large room.

In comparison to other diffusers I have reviewed the SoundSOUL manual advises on using less than most 100ml diffusers do. In reality a little experimenting will be required depending on the strength of your oil and the size of the room being used in. In a 4m x 4m x 2.4m room with my oil of choice, I found 5 drops was perhaps optimum.


The diffuser has five mist functions available…
To activate the mist function on the device the mist function button must first be held down for 2 seconds, which activates the mist function for exactly 1 hour. Tap the button again and it will become active for 2 hours, a third press will activate the mist function for 3 hours. A fourth press will switch the mist function on constantly until manually switched off or the tank is drained and a final fifth press will switch the mist function off.

Why you have to hold the button for 2 seconds to activate the mist function is beyond me, its not like its a multi function button. A tap would have sufficed as the longer you have to play with the buttons the greater chance of an accident when it is filled.

Above the “light” and “mist” buttons on the base of the device are 4 indicators (60/120/180/ON) which are illuminated to show the currently selected mist function. The device has no high or low settings and whenever either of the buttons is pressed there is a rather unpleasant loud, high pitched beep confirming your button press.


I am glad to see there isn’t a mode that turns the mist on and off, usually for 30 seconds on and 30 off as the fan cutting in and out makes the sound generated by the device that more obvious. When a sound is, at a constant, stable level you quickly become accustomed to it and begin to block it out, with the sound constantly cutting in and out you simply never become accustomed to it and are there for are more aware of it.

On the underside of the device are three feet, these feet are fitted with silicone strips that offer an excellent degree of slip resistance if you try and push the device by hand. The gaps between the feet should also not be blocked; if they are it will affect the functionality of the device.


Usually these devices have a centralised exhaust for the mist on the top and the mist exudes vertically. In the case of the SoundSOUL diffuser the exhaust is actually on the rear and the mist exits at a 45 degree angle rather than upwards. Depending on your intended placement I have some reservations about this design choice as it could well lead to a patch of discolouration on a wall, curtains of other objects placed behind the diffuser.


Thankfully, it is possible to get around this as the cover does lock into place with the exhaust either facing forwards of sideways. However, if you do this the mist duration indicators on the cover will no longer serve their purpose and you will not know which setting it is at.



The following testing was conducted using an iPhone 6 and a cheap app. The figures are a guide only and I hold no responsibility for their accuracy. They are included as a guide only.

The ambient background sound level was 26dBa to 27dBa due to a ticking clock.

At a distance of 25cm from the microphone to the edge of the device the audible beep from the device when either button is pressed measures 65dBA

At a distance of 25cm from the microphone to the edge of the device the highest recorded sound level was 31Ba and the lowest recorded sound level was 30dBa.

At a distance of 177cm from the microphone to the edge of the device the highest recorded sound level was 27dBA and the lowest was 26dBA.

The sound generated by the SoundSOUL diffuser is much lower pitched than most others that I have tested and as a result the sound generated travels much less which results in it sounding much quieter. Also, unlike most others I have tested the water inside bubbling away cannot be heard over the fan which is usually the cause of the higher pitched sound that travels further.


As impressive as the results are up close it still sounds like a fridge compressor in action and I can’t help but feel the results would be even better had a traditional turbine style fan being used rather than a cross flow fan although I am sure there was a reason for that choice, it’s just not obvious to me.



The following test results were obtained using a “Brennenstuhl PM 231 E Primera-Line Wattage Meter”.

With the device plugged in and none of the functions active the device draws 0.5w from the socket.

With the light switched on in “blending” mode and the mist function switched off it draws between 1.1w and 2.0w from the socket with an efficiency of 47% to 70%.

When the mist function is active, but the lighting function is inactive the diffuser draws between 7.3w and 7.4w with an efficiency of 51% to 55%

When the mist function is active and the light is in blending mode the device draws between 7.9w and 8.9w with an efficiency of 48% to 57%.

The following is a list of constant light modes and their power consumption readings without the mist features active.

Red – 1.2w, 52% efficiency.
Dark orange – 0.8w, 100% efficiency.
Pale green – 1.7w, 73% efficiency.
Slightly darker pale green – 1.1w, 47% efficiency.
Apple green – 1.1w, 47% efficiency.
Mid green – 0.6w, 100% efficiency.
Turquoise – 1.5w, 65% efficiency.
A darker / dimmer turquoise – 0.7w, 100% efficiency.
Mid blue – 1.1w, 47% efficiency.
Dark blue – 0.7w, 100% efficiency.
Lilac – 1.6w, 70% efficiency.
Purple – 0.8w, 100% efficiency.
White – 2.0w, 86% efficiency.
Dim white – 1.0w, 100% efficiency.


Compared to some 20+ similar devices I have reviewed in the past these figures are entirely average, there are few that use less and there are some that use more, but we are talking tenths of watts at most.


Thank you for taking the time to read this review, I hope it has been helpful to you. If you have any questions or comments regarding this review, please post a comment below and I will do my best to answer them.

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