jbcapacitors blog

In order to give best support to fans of jb Superior Audio Capacitors, we specially arranged below stock samples on hand.
If you have interesting in testing our capacitors, please feel free to contact with us.

JSX - Superior Metallized Polypropylene Film Capacitors – Axial Test Reviews
http://www.jbcapacitors.com/pdf/JSX-Superior-Metallized-Polypropylene-Film-Capacitors-Axial-Test-Reviews.pdf

JSX-Superior Audio Capacitors 250VDC 
1.0µF 250V +/-3%  Bulk RoHS  
1.5µF 250V +/-3%  Bulk RoHS  
2.2µF 250V +/-3%  Bulk RoHS
3.3µF 250V +/-3%  Bulk RoHS
4.7µF 250V +/-3%  Bulk RoHS
5.6µF 250V +/-3%  Bulk RoHS
6.8uF 250V +/-3% Bulk RoHS
10uF 250V +/-3% Bulk RoHS 

JSX-Superior Audio Capacitors 400VDC
1uF 400V +/-5%  Bulk RoHS
2.2uF 400V +/-5% Bulk RoHS
3uF 400V +/-5% Bulk RoHS
4.7uF 400V +/-5% Bulk RoHS
10uF 400V +/-5% Bulk RoHS

JSX-Superior Audio Capacitors 630VDC
1.0µF630V +/-3%  Bulk RoHS  
1.5µF 630V +/-3%  Bulk RoHS  
2.2µF 630V +/-3%  Bulk RoHS
3.3µF 630V +/-3%  Bulk RoHS
4.7µF 630V+/-3%  Bulk RoHS
5.6µF 630V +/-3%  Bulk RoHS
6.8uF 630V+/-3% Bulk RoHS
10uF 630V +/-3% Bulk RoHS

An old saying goes "No pains, No gains."  
In this year, jb Resource and Development department sacrificed lots of time and energy on designing your new product JSX.

In the process we encountered complicated engineering problems, once upon a time, we had an idea to give up.
But we are not. Perseverance and devotion make us success in the end. 
We consulted to some rich experienced audio capacitors designers and collected vast end user's using findings to upgrade and improve our JSX.

At the moment, we would like to invite you enjoy the most true testimonials about or JSX Superior Metallized Polypropylene Film Capacitors.
Believe it or not, you can try our JSX yourself and let us know how you comment about it.

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

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! 

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

We are happy to introduce our company best product to you. Very Low Dissipation Factor :
The best choice for your audio sounding applications. 

JFX - Super Premium Metallized Polypropylene Film Capacitors – Axial
JFX series is high end audio capacitors, excellent replacements of Mundor, Jantzen Audio, Auricap, Solen, etc..

Operating temperature ：-55℃～+85℃
Capacitance range： 0.1~100uF
Capacitance tolerance ：  ±3%(I)、±5%(J) 1KHz
Rated voltage ：250V、400V、630V.DC
Withstand voltage： 1.5VR 5S
Dissipation factor :  ≤0.0020 1KHz
Insulate the electric resistance：   ≤0.33uF，≥15000MΩ，＞0.33uF，≥5000 S
Leads Diameter： 0.6、0.8、1.0、1.2 Tinned Pure Copper

jb JFX - Premium Metallized Polypropylene film capacitors, Axial

PDF Datasheet Download 

Relative JFX Blog:

♫ Testimonials of JFX capacitors

♫ Test report from an Audiophile in France (Mr. SAM BENELBAZ )

♫ JFX Distributors

♫ MOQ,  Free Samples, JFX Leaflets.

JFX-Premium Metallized Polypropylene Film Capacitor (also called Audio Film Capacitor) 

★Competitive in Price 
★Nice in Qaulity                     
★Short Delivery Time
★Lower MOQ

Description:
jb Capacitors manufactures Premium Metallized Polypropylene Film Capacitors – Axial type. This high quality Premium Audio film capacitor provide perfect sound quality. 
jb Capacitors can sell low MOQ and competitive price. Following are Premium Metallized Polypropylene Film Capacitors features, 

Features:
◆Quick transient design
◆High Precise Capacitance ±3%, ±5%
◆Very Low Dielectric absorption factor
◆Very Low Dissipation factor
◆Very Low ESR
◆Very Low Inductance
◆Excellent handling of high current audio pulses

Application: Loudspeakers, Amplifiers, Headphones ect.

jb Capacitors manufactures Premium Metallized Polypropylene Film Capacitors – Axial type. This high quality Premium Audio film capacitor provide perfect sound quality. jb Capacitors can sell low MOQ and competitive price. Following are Premium Metallized Polypropylene Film Capacitors features and specifications.

Features

• Quick transient design
• High Precise Capacitance ±3%, ±5%
• Very Low Dielectric absorption factor
• Very Low Dissipation factor
• Very Low ESR
• Very Low Inductance
• Excellent handling of high current audio pulses

Specification

If you want to more information, please click below link.
http://www.jbcapacitors.com/Plastic-Film-Capacitors/JFX-Premium-Metallized-Polypropylene-Film-Capacitors-Axial.html

jb Capacitors Company is a ISO 9001:2008 manufacturer since 1980. We achieved VDE, ENEC, UL, CE,  RoHS certifications and we believe that we are just your best choice. Visit us at : www.jbcapacitors.com

Your jfx line is a very good speaker crossover cap and at its attractive pricing should be replacing most caps in all the hi-end speakers.  All competing caps which aren't as good as the jfx.
----Paul Weitzel

jb Capacitors JFX series high end audio capacitors are more and more popular in US & European Market! Widely used in high end audio equipments, cross overs, amplifiers, loudspeakers etc...

Our advantages:  Competitive Prices , Short delivery, high quality, lower MOQ, good customer service, free samples etc..

Welcome to contact us for details.  Email: info@jbcapacitors.com

jb Capacitors Company is a ISO 9001:2008 manufacturer since 1980. We achieved VDE, ENEC, UL, CE,  RoHS certifications and we believe that we are just your best choice. Visit us at : www.jbcapacitors.com