WEE Technology Company Limited - WEE are Capacitors Specialist

Thank You Letter

Dear Sir,

It is a great pleasure to write this letter to you on behalf of WEE Technology .WEET is engaged in all kinds of music capacitors for more than 20 years, we have done lots of OEM service for overseas brands. You made the right decision to choose WEET.

From your purchase record in our eBay shop, we know you are quite interested in audio system DIY. Cool, very impressive.

WEET is ready to provide FREE samples in your next purchase order to gain capacitors reviews. If you are experienced audiophiles, who can provide WEET with detailed testing report together with WEET capacitors photos and comparison information with other brands, please do not hesitate to contact with us right now. Don’t miss the chance to show off your ideas.

E-mail: Wallis-WEET Musicaps (sales@musicaps.com)

Best regards,

Ms Wallis Tao 

WEE Technology Company Limited 

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WMH Pure Aluminum Foil and Film Metallized Polypropylene Capacitors Reviews:

Sound: The physical size and shape of the WEET WMH is very similar to that of the Jantzen Audio Alumen Z-Cap 100VDC and Cicada Pure Aluminium Foil 100VDC. The WMH has a clear top end, more detailed than that of the Alumen Z-Cap but therefore less smooth. The Alumen's smoother nature makes it sound more intimate in a direct A-B comparison. Furthemore the Alumen had better depth, imaging and a slightly richer tone. Compared to the Cicada Pure Aluminium Foil the WMH Aluminum Foil and Metallized Polypropylene is far more open and clear, it just sounds less closed-in. If we go to a different breed of capacitors from the Mundorf stables the Supreme Classic sounds less mature than the WMH although it does have a similar amount of clarity in the top end. Vocal with the WMH have more richness making the Supreme Classic sound a little forward, a little more in your face. From Mundorf's EVO range, the Supreme EVO Oil also lacks a little overview compared to the WMH. But if we go up the Mundorf scale to the Supreme EVO Silver Gold Oil we get far better reverberation information and heaps more low level detail. This makes the Supreme EVO Silver Gold Oil keep the overview in complex orchestral music where the WMH tends to get muddled up. In direct comparison the WMH sounds rather bland.Maybe not quite at the same level as the higher grade Mundorfs or Jantzen Audio's aluminium foil Alumen Z-Cap but still a reasonably neutral and very usable capacitor.

Verdict: 11

WEE Technology Company Limited - WEE are Capacitors Specialist

For easy reference, we would like to list WEET hot and common pure Aluminum Foil and Polypropylene Film Audio Capacitors values as below.

http://www.jantzen-audio.com/alumen-z-cap/

WEET WMH is cross to the Alumen Z-Cap (pure aluminum foil capacitors) , whicg was especially designed for the tweeter and mid-section of crossovers for passive hi-fi speakers.

Review by Mr. Troels Gravesen: http://www.troelsgravesen.dk/Alumen_Z-Cap.htm

Note: Other Values are available on request. WEET is capable of doing custom service for you.

WEE Technology Company Limited - WEE are Capacitors Specialist

How people comment about WEET WMH aluminum foil and film capacitors (Pure Alucaps) and sharing a review ?

From the MKT film capacitor to the aluminum foil and film capacitor, all of a sudden people have the feeling of returning from fairyland to the human world, which is more practical. The sound density of the aluminum foil capacitor is also very high, and the sound fullness is better than that of the MKT film capacitor (maybe the sound is loose and gives people the illusion). The aluminum foil capacitor is not thick and dry. It has good transparency and music details. It has strong low-frequency bounce power, large amount of music information and strong music charm. The sound performance is also relaxed and natural. It is a very listening capacitor.

The tone is golden and soft. The intensity of the tone is better than that of the reference capacitor. The performance of the intermediate frequency is very pleasing to the ears. If you do not believe it , you can have a try.

https://www.musicaps.com/WEET-Foil-and-Film-Audio-Capacitors.html

WEE Technology Company Limited - WEE are Capacitors Specialist

When talking about Audio Grade Film Capacitors, you man know some famous brands, such as ERSE, Clarity Cap , Jantzen Audio,  Mundorf MCap, Solen Capacitors.
But when you looking at the price tags, you maybe astonished too. 
As they are European brands with many years. However, some of them really look for China factories do OEM service.

WEET has 20 years’ experience in producing audio capacitors. 
Before we mostly do OEM for domestic and overseas brands, right now we begin to promote our products under our own trademark WEET. 
At the same time, we also can do OEM loge printing service for good customers. Please give you list, we will feedback you with an surprise.

https://www.musicaps.com/WEET-Foil-and-Film-Audio-Capacitors.html

WEE Technology Company Limited - WEE are Capacitors Specialist

WEET WMH 1uF 100VDC film and foil crossover capacitors are often used in Audio Crossover Networks Application

Film capacitor selection is extremely important to achieve an acceptable quality sound reproduction. Consider the Root Mean Square (RMS) AC rating of the speaker system when selecting the appropriate capacitor since over voltage of a capacitor can result in the premature failure of the component. Additional parameters are the ESR and Dielectric Absorption (DA or DF) of the film capacitors. These values must be as low as possible to avoid distortion. A typical speaker crossover network is populated with a combination of electrolytic and film capacitors. We highly introduced our WEET WMH Series of Pure Aluminum Foil Capacitors to you. For other values, please check below link, thank you.

https://www.musicaps.com/product/WEET-WMH-Pure-Aluminum-Foil-Capacitor-Cross-Reference-to-Jantzen-Audio-Alumen-Z-Cap-and-home-HiEnd-Capacitors.html

WEE Technology Company Limited - WEE are Capacitors Specialist

There are several kinds of non-polar aluminum electrolytic capacitors. 
The basic characteristics of the non-polar electrolytic capacitor have not been changed, but some measures have been taken in the structure, which can be used in reverse. 
Whether it can be used in AC circuits and circuits with large ripple current depends on other properties, such as the temperature rise of capacitors, the impedance frequency characteristics of capacitors, etc.

According to different uses, there are many types of non-polar aluminum electrolytic capacitors. The following introduces several small non-polar aluminum electrolytic capacitors with different characteristic levels.

1) Non polar aluminum electrolytic capacitor. Here "general" means that there are no other measures except for the oxide film on both poles. 
Its electrical properties are similar to those with polarity, and have the characteristics of small volume and large capacity. The capacitance error, loss tangent, DC leakage current and other indicators are similar to those of ordinary polar electrolytic capacitors. It is mainly used in the polarity conversion of DC or pulse circuit, such as color TV decoding circuit. At present, many manufacturers in China have this kind of capacitor (different series, different electrical performance indicators). 

2) A non-polar aluminum electrolytic capacitor used for frequency division in audio circuits. 
This is a special type of non-polar electrolytic capacitor, 
it is different from the general non-polar electrolytic capacitor, the volume is slightly larger than the general type, the electrical performance index is also higher than the general type, 
the capacitance error is small, the loss is low, and the DC leakage current is small.
As a frequency dividing capacitor, most of them are used at the frequency of 10-20KHZ. The frequency characteristics of wound electrolytic capacitors are also very important.

WEE Technology Company Limited - WEE are Capacitors Specialist

Is there any difference between ordinary electrolytic capacitor and audio frequency electrodeless bi-polarized and non-polarized capacitor?
Can the capacitance of loudspeaker treble be replaced by ordinary electrolytic capacitor? Is it different from that of audio frequency electrodeless capacitor?

The difference is that ordinary electrolytic capacitors have positive and negative polarity requirements, and can only work at lower frequencies. 
However, the electrodeless bi-polarized and non-polarized capacitors of loudspeakers have no polarity requirements and can work at relatively high frequencies, such as 1KHz or 100Hz.
If you need them in emergency, you can connect the two same electrodes of two common electrolytic capacitors together, and the other two terminals are used as the two poles of the combined capacitor

WEE Technology Company Limited - WEE are Capacitors Specialist

WMM 1000H 105°C,  Bi-polar Alcap Features:

Low Dissipation Factor, MAX 5% at 1KHz
Specially produced for Cross-Over Networks with high fidelity audio system
High-quality crossover non-polar aluminum electrolytic capacitors
Product mainly used: audio converters and dividers (partials), Audio amp,  automotive electronics products, speaker.
Note 1：Other Dissipation Factor 3%, 4%, 6%, 7%, 8%, 9%, 10%, 12% are available on request.
Note 2：The sleeve (PET) color of the product differs from batch to batch, so there will be slight color difference. Thank you.

https://www.musicaps.com/product/WEET-WMM-BP-AXIAL-Bi-polar-1KHZ-DF-5-Aluminum-Electrolytic-Capacitors-for-Audio-and-Speaker-System.html

https://www.musicaps.com/Uploads/PDF/WEET-WMM-BP-AXIAL-Bi-polar-1KHZ-DF-5-Aluminum-Electrolytic-Capacitors-for-Audio-and-Speaker-System.pdf

WEE Technology Company Limited - WEE are Capacitors Specialist

5. Open circuit

The open circuit failure of aluminum electrolytic capacitor may occur when it works in high temperature or hot humid environment for a long time. The reason is that the anode lead-out foil is broken due to electrochemical corrosion. For high voltage and large capacity capacitors, there are many such failure modes. In addition, if the anode lead-out foil and anode foil are riveted, the capacitor will open intermittently due to poor contact. In use, over mechanical stress may cuase the open circuit of the capacitor.

6. Deterioration of electrical parameters

① Decrease of capacitance and increase of loss

The capacitance of aluminum electrolytic capacitor decreases slowly in the early stage of operation, which is due to the continuous repair of working electrolyte and thickening of anodic oxide film during the loading process. In the later stage of use of aluminum electrolytic capacitor, due to the loss of electrolyte and the thickening of solution, the resistivity increases due to the increase of viscosity, resulting in the increase of equivalent series resistance of working electrolyte, resulting in the obvious increase of capacitor loss. At the same time, the electrolyte with increased viscosity is difficult to fully contact the oxide film on the surface of the corroded uneven aluminum foil, which makes the effective area of the electrode plate of the aluminum electrolytic capacitor decrease and the capacitance drops sharply. This is also the performance of the capacitor near the end of its service life.

In addition, if the viscosity of working electrolyte increases too much at low temperature, the loss will increase and the capacitance will drop sharply. In use, over temperature and ripple current may make the capacitance decrease and loss increase.

② Leakage current increases

The increase of leakage current often leads to the failure of aluminum electrolytic capacitor. Low process level, serious damage and contamination of oxide film, poor formulation of working electrolyte, low purity of raw materials, difficulty in long-term stability of chemical and electrochemical properties of electrolyte, low purity of aluminum foil and high content of impurities, etc., all of these factors may cause leakage current out of tolerance. The chloride ion contamination in aluminum electrolytic capacitor is serious. The leakage current leads to the decomposition of oxide film at the contaminated part, resulting in perforation, which further increases the current. In a word, the existence of metal impurities in aluminum foil will increase the leakage current of aluminum electrolytic capacitor, thus shortening the life of capacitor.