Simple, Hard and Affordable

Ratings

Construction and Design

Adjustment/Ergonomics

Accessories

Operation and Connection

Sound

Quality/Price

Pros

Ergonomics and fit.
Small size and light weight.
Durability.
Waterproof, IPX4.
Very good sound during phone calls.
Very high compatibility with current devices.
Deep and enhanced sub-bass.
Treble present but pleasant.

Cons

The battery life is not very long.
It is difficult to remove the TWS7s from the charging case because they are slippery.
The microphone is not very sensitive and lacks noise reduction technology.
It does not support the most advanced Bluetooth codecs, only AAC/SBC.
Simple sound, far away mids.
Volume not very high.
It still uses micro USB Type B connection.
Both the instructions and the box are in Chinese.

Purchase Link

https://penonaudio.com/hessian-tws7.html

Link to the Store

https://penonaudio.com/

Introduction

Hessian seems to be a new brand from China. The first model I heard about was the Ansata Pro, earbuds with a design halfway between the Ourart QJ21 and the ISN Rambo II. This time the model to review is a fairly inexpensive IEMS TWS. They are Bluetooth 5.0 compatible, waterproof and have a very light and ergonomic body, with a shape that allows a deeper insertion, without the capsule bothering the pinna. Their charging case is lightweight and allows the TWS to be recharged up to 4 times. The rest of the features will be discussed below.

Specifications

Bluetooth version: V5.0
Bluetooth chip: BK
Driver: 6mm composite
Impedance: 32Ω±3%.
Frequency range: 2.4000-2.4835GHz
Frequency response: 20-20kHz
THD: <1%@1kHz
Power rating: <10mW
Headphone battery: 45mAh x2, 3.7V
Charging box battery: 400mAh, 3.7V
Rated charging voltage: 5V
Maximum working distance: 10m (unobstructed)
Headset operating time: >3 hours (excluding charging box)
Headset charging time: approx. 1.5 hours
Charging time of the charging box: approx. 2.5 hours
Charging headset via charging box: 4 times
Standby time: approx. 200 hours
Water resistant: IPX4 (earphones)
Charging box size: 77x36x29mm

Packaging

The Hessian TWS7s come in a generic dark box, sealed in cellophane. On the lid is a drawing of a man, done in glossy black ink. The drawing is not complete, you can see the head and the chest. Below it, the name of the brand can be read. On the back is a white sticker, with the specifications in Chinese. Nothing else.
When you open the box, you can see that the product is very well protected, with large foam sheets. There is a black cardboard box, which houses the accessories, the charging box, inside which are the TWS, a warranty card and a larger card with instructions. In summary, the complete contents are as follows:

The IEMS TWS.
The charging box.
3 pairs of black silicone tips, sizes SxMxL.
3 pairs of grey silicone tips, sizes SxMxL.
1 USB 2.0 type A male to USB 2.0 micro type B male charging cable.
Warranty card.
Instruction card.

The grey tips are very soft and have a particularly conical shape, they may be useful for some people. It’s nice that two sets of tips come, but there is no cloth pouch or similar, to protect the charging box.
The presentation is very simple and generic, with a rather large box. But the price is too low to ask for more.
It should be noted that everything is written in Chinese, which makes it very difficult to understand the instructions.

Construction and Design

The TWS7s appear to be made of rigid, black plastic. They are remarkable for their light weight and can hardly be felt in the hand. Their outer face is shaped like a fairly rounded oval and their largest diameter (horizontal) is no more than 20mm and the smallest (vertical) is approximately 17mm. From the outer face to the tip of the mouthpiece, it is almost 25mm. The thickness of the capsule is 15mm and the mouthpiece and its extension, from the base of the inner face, measure almost 10mm. The mouthpiece itself is short, as usual, just 3mm. It consists of two parts: the initial part is a cylinder 4.8mm in diameter and the crown, which is 1mm thick and 5.6mm in diameter. The mouthpieces are protected by a metal grid.
On the outer face there is a physical, almost round button with the brand name inscribed in the centre, but in the same colour. There is a small hole in the crown surrounding the button. Possibly it is the opening of the microphone. Near it, on the inside, is the function LED. On the inner side, at the very bottom, are the channel indicator letters, written in raised grey ink. Near the edge of the inner side, at a higher level, there are three connection points, slightly recessed.
The charging box measures 77x36x29mm. It is also made of hard, black plastic. The lid has horizontal grooves and in the centre is a flat box with the logo and brand name. On the front side face, there is a slot for easy opening of the lid. Underneath, there is an LED protected by a rectangular visor with rounded corners. Its light is very dim and white. On the back side is the USB connection. It is a micro, type B, female connector. Finally, on the base, the bottom side, are the specifications of the charging box, in grey letters and in Chinese.
The lid does not offer much resistance to opening and its hinge feels a bit sluggish. The internal ergonomics are not the best and it is difficult to remove the TWS from the charging dock because it slips out of your fingers. The USB connection is outdated, the new, more common USB Type C connector would have been better.
It could be criticisable that the whole construction is made of rigid plastic, of the same colour, while the case doesn’t feel fragile, the capsules seem to be fragile due to their light weight. But closer inspection and the daily use to which I have subjected them, make that feeling untrue.

Adjustment and Ergonomics

The almost round, small body and the slim base of the mouthpieces make the ergonomics quite good. There is no rubbing of the capsules against the ear parts. The mouthpiece itself is somewhat short and the large, conical tips have been the best suited to my particular morphology. With them I have achieved the best fit, very durable and firm, as well as comfortable and with the best sound. Therefore, I think that with the two sets of standard tips, it will be enough for most future buyers.
Thanks to the good fit and depending on the insert, the isolation can be good, better than average, especially if you choose the conical tips, which help the fit to be deeper.

Operation and Connection

The LED display of the charging box is also its power button.
There are two methods to turn on the TWS7:
1.- Remove the headphones from the charging box.
2.- Press the L and R buttons for 3 seconds.

To switch off the TWS7, the methods are as follows:
1.- Put the TWS7s in the charging box, they will switch off automatically. To do this, the charging box must have sufficient battery power.
2.- Press the L and R buttons for 3 seconds.
3.- 5 minutes after disconnecting the headphones from the device, the headphones will turn off automatically.

To connect the TWS7 to a device follow the steps below:
1.- Enable the Bluetooth function of the source device.
2.- Search for new devices.
Turn on the charging box, the headphones will automatically turn on and enter pairing mode. The indicator on the headphones will start to alternate between red and blue lights.
4.- When the source device finds the TWS7s, it will recognise them as HESSIAN TWS7-L or HESSIAN TWS7-R.
5.- Next time, this process will be automatic.

The operation of the buttons is as follows:
Volume adjustment: Double press on the right capsule increases the volume, on the left capsule decreases the volume.
Play/pause: One press on either capsule.
Previous/next song: Long press 1.5s left/right on the earphone.
Answer/hang up a call: Double click on any of the capsules.
Reject call: Press and hold the handset for 2 seconds.
Manually enter pairing mode: Press the button on the earphone continuously for 6s.
Activate voice assistant: Press the button on the earphone three times.

Explanation of the TWS7 LED indications:
When switched on, the blue LED will light up for 2 seconds.
When turned off, the red LED will light up once.
During pairing mode, the red and blue LED lights will flash alternately.
During pairing mode, the blue LED light will flash slowly.
During reset mode, the blue LED light will flash 3 times, the red LED light will always light up 1 time,

Charging box battery indicator:
When the earphones are charging, the white LED light flashes.
When the earphones are fully charged, the LED light will be off.
When the charging box is charging, the white LED light will flash slowly.
When the charging box is fully charged, the white LED light will always be on.
75-100% power: The white LED light flashes 4 times.
50-75% power: The white LED light flashes 3 times.
25-50% power: The white LED light flashes 2 times.
Below 25% power: The white LED light is off.
0% power: LED white light does not respond.

As for the practical operation of the TWS7s, pairing with devices is fast and the sound of calls is quite good. However, the microphone sensitivity is not very high. As a result, the listener perceives our voice as low and it also seems to lack some kind of background noise cancellation.

Finally, the codecs used are AAC/SBC. They guarantee operation with almost 100% of the current devices on the market. However, they are not the latest and greatest Bluetooth audio codecs.

Reset the TWS7:
Place the earphones in the charging box and press the button on the charging box for 6 seconds to reset the headphones. The left/right LED blue light will flash 3 times and the red light will flash 1 time.

Sound

The profile of the Hessian TWS7 is a W with emphasis on sub-bass, mid-high and treble. The choice of tips will allow you to move it to a darker or more balanced area, or even to a brighter one. For the analysis I opted for the tips that gave me the best balance, which were the standard conical, large size.
The main emphasis of the TWS7’s sound is purely focused on the sub-bass. From there, the descent is clear and fast, towards a moderately sunk midrange. Turning to the sub-bass, despite the energy and its dark colour, its structure is simple, with an average roughness, which does not stand out as being very descriptive, nor does it have a punch that moves a lot of air, although the presence is undoubtedly there. The mid-bass is perceived as clean, without swelling. The recreation of planes is not very rich and the resolution is acceptable.
The mid-range feels ambivalent, as it has a slightly warm, dark edge. However, the sparks of light also give it a good clarity and sharper edges. But this ambivalence is also reinforced by the distance from the centre, which polarises the perception of the mid-range. In this way, the sensation of a V-sound in the mids can become elevated (depending on the tips), showing an imbalance that does not help to present the voices close or full, but is more lavished on the edges than in the body.
Voices and instruments are perceived at a similar distance, as I said, moderately distant, though well matched. The sound feels simple, unsurprising, despite the treble effort. It is moderate in its recreation of detail and nuance. The tone is adequate, the timbre is not unreal, although it is not very full, due to the central drop.
With the right tips, the treble level can be improved quite a lot, both in its tonality and in its sparkle, vivacity and expressiveness. Without being a waste of resolution and definition, the treble does not stray from naturalness and is quite correct. They have a good edge and an adequate thinness, so they are not too crisp, but they do have a subtle touch that enhances their quality. The treble extension, without being large, is sufficient to provide a slight sense of air, which helps to decongest the sound.
The soundstage is average, not claustrophobic, not overly intimate. There is a moderate level of depth and the right amount of separation. But again, the presentation is merely basic, without much to note.
On another note, the volume level is low to medium. It can be controlled from the headphones, but it is best to set it to maximum at the start, so that the subsequent control is from the source device.
Finally, I would like to comment that the sound of the TWS7 can be quite dependent on the tips used. Choosing some tips, with wide channel and low height, I thought I was going to enlarge the sound, give it more air and clarity. But it was totally the opposite: I got a dark and blunt sound, lacking treble and too warm. Then I used the classic SpinFit and the sound became brighter and more detailed, at the cost of losing presence in the low end and polarising the V in the midrange. Finally, the standard conical tips were the ones with which I got a more balanced sound, with more overall presence of the bass, warmer but more homogeneous mids and more controlled but present treble.

Conclusion

The Hessian TWS7 is an entry-level TWS at a fairly affordable price. Their qualities include comfort and ease of use. The technology employed allows a range of 10m and a very simple and fast operation. The buttons are physical, large, easy to use and quick to respond. Their behaviour is even better than that of many other touch devices, whose sensitivity sometimes falls short. The sound is correct, without any boasts, but without flaws. It is based on an energetic sub-bass and a profile with moderately backward, but clean mids. The treble is appreciable and in the technical aspects, the level is simply good. Its amount of volume is not very high, but its good isolation level can compensate for this limitation.
The simple but durable appearance, combined with the small size of both the capsules and the carrying case, make them suitable for everyday use at home, at work or for sports, thanks also to their very low weight and their great fit. They also meet the IPX4 specification and are waterproof.