jbcapacitors blog

In the search of a affordable audio capacitors for decoupling purpose, I have got the JFX and JSX series from jb Capacitors. Now I will explain how they are compared with a a few others of similar size range.

Tested capacitors:
JSX: 2.2uF/250V
JFX: 2.2uF/400V
Mundorf Mcap 2.2uF/250V
Mundorf EVO 2.2uF/450V
Clarity Cao PX 2.2uF/250V

To have similar requirements I have a relay switch board next to my  pre-amp direct out from DAC. All DC coupled and no other capacitors in this way. DAC output impedance is 47Ohm, Pre-amp impedance is 470kOhm. These are very common values and should be give a good start point for comparisons. I can switch direct from capacitor to capacitor and DC coupled.

Mesurements are all very good. most below my measuring equipment. The tolerances where all below the printed 5%(JFX) and 3%（JSX）. I have measured 1.36% and 0.99%.
The dielectric dissipation factor has been tan:<0.001 at 1kHz.

Listening test:
JSX: Clear, detailed, wide and open up presentation
JFX:  Detailed, gives a realistic soundstage and stress free listening. very natural and a good tonal balance. My favourite for acoustic instruments and voices.

Mcap:
Clear with more midrange. Makes sound a bit hard and grained.

EVO:  
Detailed and holographic presentation, seems to be a bit louder, but tonal balance is not perfect. After longer listening I feel like disrupted soundstage. 

Clarity Cap PX:
Musical and warm, but less detailed.

After burning in with 24hrs:
JFX: well balanced with more 3 dimensional stage, warm finish
JSX: clean and clear with rich details, but flatter sound stage
Overall both types are very high quality and for sure a good choice for a competitive price.

Summary:
jb Capacitors has surprised me with excellent capacitors. They are not expensive, small sized and good sounding. They beat most of even more expensive capacitors. Well done!

Best regards
Alex
Dial-Audio

More information please check below link:
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFX-Premium-Metallized-Polypropylene-Film-Capacitors-Axial.html
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial.html

Samples Tested by Mr. HF Choi
jb JSX - Superior Metallized Polypropylene Film Capacitors - Axial
JSX  1.0uF 250V +/-3% Bulk RoHS,  4pcs 

Datasheet link: http://www.jbcapacitors.com/pdf/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial.pdf

Introduction of Mr. HF Choi
My name is HF Choi I am in the UK and looking for quality JSX cap for DIY hifi.  

Original letter from Mr. HF Choi
I received the capacitors a couple weeks ago and have installed them in my DAC.

I installed the 4 JSX 1uF caps as bypass on the output electrolytic caps of the DAC (2 caps per channel, each 150uF), so the bypass was less than 1%.
Immediately on first listen I could hear that the bass was bloated and the soundstage was closed in but the treble was a bit sweeter.

I let the DAC continue to play for 50 hours after which the bass improved dramatically.  It sounded like an extra octave lower was added.
Also, the treble was becoming more tangible and fine details throughout the frequency range became audible whereas before they were not.  
Nuances now audible in the music making instruments sound more real changed the tonality of entire pieces of music.
It slowed the music down somewhat for some fast bass music but also sped up music with fast transient treble.
Nice, as this probably means there's now less signal smearing and timing issues.

I find there's now a less of a difference between redbook tracks and DSD tracks.  
Both sound smooth and detailed now but DSD more dynamic with good recorded material.
Still very enjoyable with the improvement in tonality, timing, low level detail and nuances, and improved frequency extension - and of course price is very good. I’ve used them for hundreds of hours so far.

I chose the JSX because of the small size. Compared with large and expensive Mundorf and similar grade caps, it is an easy choice. Very high price/performace ratio with the JSX.
I am very satisfied with the performance of the JSX . Thanks for a great product! 

1. JFX &JSX - Premium & Superior metallized polypropylene film capacitors--Axial type(cross capacitors) 
Mainly used in  Audio equipement, cross overs; our MOQ is low, prices unbeatable, very excellent replacements of Mundorf, Jantzen audio , solen,ERSE etc.. 

2. JFA - Mylar Polyester Film capacitor(CL11) --- Mainly used in Energy saving lamps, demand is huge, cost is low.

3. JFB - Metallized Polyester film capacitor(CL21)--dipped type  --- cross to Vishay MKT 368, Epcos B32591~B32594, mainly used in power supplies, electronics ballasts etc..our prices & lead time are very good.

4. JFD - Metallized Polyester Film capacitors(CL23)--Box type  ---Cross to Arcotronics R60, Epcos B32520~32524, European customers prefer it, as it is box type, nicer..

5. JFG - Axial metallized polyeter & polypropylene film capcitor(CL20&CBB20) -- Cross to Arcotronics(Kemet) MKT A50, MKP A70 ,  Vishay MKT1813, MKP1839, 1845, jb capacitors prices are unbeatable.

6. JFP - High voltage Metallized Polypropylene film capacitors (CBB81), -- mainly used in electronics ballast, cross to Epcos B32692, prices and lead time unbetable, quality is very reliable.

7. JFV&JFZ - X2 Metallized polypropylene film capcaitors(ENEC VDE UL Approvals)--jb top sellers, cross to Arcotronics R46, prices & lead time are very good. with ENEC VDE UL approvals, quality is very reliable.

Please contact Ms. Lilian Zhu for more details at  info@jbcapacitors.com

We would like to show you around of our jb Capacitors Company. The best way is to check below website pages.

In this section, you will know the most strong products of our jb Capacitors Company, such as JFA, JFB, JFV, JFZ, JFX, JFS, JCS, JRA and so on .
www.jbcapacitors.com/showroom-jb-Capacitors-Products-Photos.html

In this section, you will feel impressed by our all kinds of catalogs and least, as well as our comprehensive sample kit.
www.jbcapacitors.com/showroom-jb-Capacitors-Promotion-Photos.html

In this section, we will like our international standard envelopes and packages. All we want to do is to protect our products and show our professional working manner.
www.jbcapacitors.com/showroom-jb-Capacitors-Package-Photos.html

In this section, we will talk you go with jb sales to our exhibition booth all over the world. Germany is always our priority in exhibition list.
www.jbcapacitors.com/showroom-jb-Capacitors-Exhibition-Photos.html

We will update our jb production line and safety approvals VDE, UL section very soon, please follow up with our step and enjoy your jb capacitors trip.

After a period of preparation, we finally finished JSX common items stock samples. 
Free samples are at your disposal, please feel free to contact with us. We would like to hear your voice on how our JSX works in your Hifi system.

Here you can refer to one of our valuable customers comment on our JSX great performance.

" In general, the white JSX does have more detail and sounds more open/clear.
Also the JSX with a little darker sounding but also a little more coherent and tonally richer and have warmer harmonics making it more pleasant to listen to on long listening sessions."

For more details, please check below link: 
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial.html

Every year jb Capacitors Company will evaluate our production line. 
On one hand is to find out our most strong products, on the other hand is to update our present products.

In year 2015, our upgraded JFZ series will help you win more X2 310VAC MKP capacitors business! Great price!
JFS series motor running capacitors win good feedback from our european customers. JSX is upgraded from JFX ,which with lower DF value can cross to international famous brands.
We do radial aluminum electrolytic capacitors many years, this year we expand our production line in this type of products.

JFA--Mylar polyester film capacitors
JFB--Metallized polyester film capacitors
JFL--Metallized polypropylene film capacitors
JFG--Axial lead film capacitors
JFV--X2 275VAC met polypropylene film capacitors
JFZ--X2 310VAC met polypropylene film capacitors 
JFP--High voltage metallized polypropylene capacitors
JFQ--Double sided metallized polypropylene capacitors
JFS--Motor running capacitors
JFX--Premium metallized polypropylene capacitors
JSX--Superior metallized polypropylene capacitors 
JCS--85°C SMD electrolytic capacitors
JCK--105°C SMD electrolytic capacitors
JRA--85°C Radial aluminum electrolytic capacitors
JRB--105°C Radial aluminum electrolytic capacitors

For mor products, please check our products page : http://www.jbcapacitors.com/products.html

Does your market has demand for low DF values audio capacitors, that is to say the Superior Audio Capacitors, which is a higher level of JFX both in price and quality.
We call it as JSX, we sell JSX a lot in our domestic market and enjoy extraordinary feedback.

Our JSX is online now, please check below link. We can provide common samples for testing if needed.
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial.html

We're planning to promote JSX to oversea market too, how do you think ? Free samples are ready for your testing.

JSX - 250V Superior Metallized Polypropylene Film Capacitors – Axial 
1.0uF 250V +/-3% Bulk RoHS
1.5uF 250V +/-3% Bulk RoHS
2.2uF 250V +/-3% Bulk RoHS
3.3uF 250V +/-3% Bulk RoHS
4.7uF 250V +/-3% Bulk RoHS
5.6uF 250V +/-3% Bulk RoHS
6.8uF 250V +/-3% Bulk RoHS
10uF 250V +/-3% Bulk RoHS

JSX - 630V Superior Metallized Polypropylene Film Capacitors – Axial
1.0uF 630V +/-3% Bulk RoHS
1.5uF 630V +/-3% Bulk RoHS
2.2uF 630V +/-3% Bulk RoHS
3.3uF 630V +/-3% Bulk RoHS
4.7uF 630V +/-3% Bulk RoHS
5.6uF 630V +/-3% Bulk RoHS
6.8uF 630V +/-3% Bulk RoHS
10uF 630V +/-3% Bulk RoHS

Does your market has demand for low DF values audio capacitors, that is to say the superior audio capacitors, which is a higher level of our present JFX.
We call it as JSX, we sell JSX a lot in our domestic market and enjoy extraordinary feedback.
We're planning to promote JSX to oversea market too. 

Please send us your RFQ if you are interested in pursuit higher quality products.
Limited samples are on hand now. First come, first served. We are looking forward to cooperate with you.

jb Capacitors Company produce Uncoated Stacked metallized polyester film capacitors with Short Delivery Time, Competitive Prices, good quality.

Cross to Epcos B32560~B32564 series, General purpose(Stacked) SilverCap. 

Normally used in SMPS, Converters, Electronics ballasts, Compact Fluorescent lamps(CFL), Ignitions etc.. Our prices are very attractive, lead time is short. 

jb Capacitors Strong Products:
JFA--Mylar polyester film capacitors
JFB--Metallized polyester film capacitors
JFL--Metallized polypropylene film capacitors
JFG--Axial lead film capacitor
JFV--X2 275VAC met polypropylene film capacitors
JFZ--X2 310VAC met polypropylene film capacitors
JFP--High voltage metallized polypropylene cap
JFQ--High voltage metallized polypropylene cap
JFS--Motor Running capacitors
JFX--Premium metallized polypropylene Cap
JSX--Superior metallized polypropylene Cap
JCS--85°C SMD electrolytic capacitor
JCK--105°C SMD electrolytic capacitor
JRA--85°C Radial Aluminum Electrolytic Capacitor
JRB--105°C Radial Aluminum Electrolytic Capacitor
JNE--105°C Snap Aluminum Electrolytic Capacitor
JMJ--85°C Screw Aluminum Electrolytic Capacitor
JSU--55°C Lug Aluminum Electrolytic Capacitor

Polyester films, are clearer and a higher quality than lower grade films, which tend to be foggy. Premium films also endure extreme environments and severe stress conditions more favorably. Films with higher polyester content are more rigid and feel thicker than films with more adhesive content.

Polypropylene film is softer than polyester, but still has excellent clarity. These films have strong chemical resistence, good color stability over printed sheets, and good elasticity which allows the film to lay extremely flat. Due to its softness and flatness, polypropylene films are most often used in single-sided laminating.