Price List

J&K price list for your reference - not all our products are listed. If you do not find what you want, just shoot us an email.

*** Note: This is is outdated. Please email for latest quotation. *** 

J&K Audio Design
30 Aug 2014

Disclaimers:
We may make changes to specifications and product descriptions at any time, without notice. The information here is subject to change without notice. Do not finalize a design with this information. The products described in this document may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Contact us to obtain the latest specifications and before placing your product order.

*Other names and brands may be claimed as the property of others.
Copyright © 2014-15, Intel Corporation. All rights reserved.

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

Cobalt Output Transformers

We thought that this was the best we could do - the largest Amorhpous double C Core output transformer - giant C core output transformers.

We were wrong!

We're now rolling out Level 2 Cobalt based Amorphous C cores output transformers! Now that is something exotic and special. Cobalt is a rare earth mineral and is highly sought after. They have the sound of their own too that cannot be found using other cores.

Cobalt iron for transformers - this is an alloy that contains Cobalt 35. It is expensive and unusual to be used as output transformers. It has advantages of having very high permeability yet high handling power with saturation limit with a Bmax of ~24000. This equals more sensitivity to changes (micro-details), resulting to refine sound, and with ample reserve to handle high flux (high signal/power). Take a look at the table of its' magnetic properties.

We do not have to say more about Cobalt based output transformers. Just Google for it yourselves.

Cobalt based C Cores

Cobalt C Cores

Cobalt Output Transformers

Magnetic Properties

Notice the Cobalt steel properties? It has highest DC saturation limit and maximum AC operating flux among all the other materials! With reasonable Permeability that is sufficient for audio range operation, it is one of the best material for building output transformers!

Now, scroll to the bottom and fill in the form to order yourself a pair (or a couple of pairs) of Cobalt transformers before they're gone. This rare earth mineral is getting scarce everyday. We do not know when it will run out as there are very little stock left of such high grade materials.
 
J&K Audio Design
28 August 2014

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

Transformer Case

*** 12/2015 - no longer available, manufacturer stopped production ***

These are the transformer cases that we are using for some of our potted transformers. Since a lot of people asked about what we use, we might as well publish it here to save all the attaching work. :)

3 sizes:

1. 80 x 80 x 90 (H) mm, mounting hole 60 x 60 mm, 4m thread, window 46 x 46mm, 1mm thickness top, 1.8mm bottom plate, for EI76, for single C cores - U$33/pc
2. 105 x 105 x 105 (H) mm, mounting hole 83 x 83 mm, 4mm thread, window 67 x 67mm, 1mm thickness, 1.8mm bottom plate, for EI96, for single and double C cores - U$35/pc
3. 122 x 122 x 130 (H) mm, mounting hole 96 x 9 mm, 4mm thread, window 73 x 73mm, 1.2mm thickness, 1.8mm bottom plate, for EI114, for double C cores - U$D38/pc

Notes:

• Internal dimension is external - ~3mm.
• Special prices if is used with our transformers. 

J&K Audio Design
27 Aug 2014

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

Power Amplifier

This is a customer's power amplifier using our 500VA Z11 power transformers.

J&K Audio Design
27 August 2014

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

3K Single Ended Output Transformer

3K Single Ended Output Transformer In Circuit Measurement - Level 3 - Amorphous Double C Core - Made for KT88 / KT90 / EL156.

Single Ended Pentode 
15Hz to 60kHz +/- 3dB

 Above are in-circuit actual operating measurement.

KT88 Pentode Mode.

2dB per column for Y-axis

Single Ended Triode 
5Hz - 60kHz +/-3dB

Above are in-circuit actual operating measurement.

KT88 Triode Mode
2dB per column for Y-axis

Power:30W(20Hz）

Frequency response:

* 20Hz（-1.71dB）—1KHz（0db）—20KHz（0.18dB） (Pentode mode)

* 20Hz(-0.16dB) (Triode mode)

UL: 40%

Primary Impedance: 3K

Primary DCR :135Ω（B-P，28℃），

Secondary DCR: 8 Ohm @ 0.62 Ohm

Primary Inductance:26H （measured at 140mA，20Hz，5Vrms）

Max Pri DC：240mA (recommended 150mA)

Matching:

* DCR 2% （0.2 Ohm）

* Primary Inductance 5% (1H)

J&K Audio Design
8/19/2014

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

How To Order

How to order our products?

* Just email us your wish list!
* Use the contact form at every bottom of page!

J&K Audio Design
18/8/2014

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

Double C Core Power Transformers

Check out our double C core power transformer. This is a premium (level 1) grade power transformer made for a fellow local tube enthusiasts. It is about 300VA in size. Level 2 will use the Super Hi-B C cores.

It does not have any matching enclosure and therefore it will be bare naked. Afraid not, the stand and frame are very sturdy.

13 August 2014
J&K Audio Design

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.

Cheapest Tube Amplifier

It has been some time we update our blog. A lot of activities are happening at the background that tied up all our time to do some write up. Transformers order, custom amplifier orders and etc are lining up back to back and kept us busy until October-November'14.

Below is the entry level amplifier that we are building for a tube beginner with all our new old stock components from our storeroom that has been kept for some time. Those with sharp eyes will notice that even the choke is not from us. (Blush!) Well, those were the transformers we bought for comparisons or benchmark to ensure our stuff is equal or better in quality when compared to the major brands. Since they're sitting idle, we say, why not just get them utilized?! Nothing much to shout aloud with but it is still decently built.

Entry level tube amplifier

•  NOS Russian Paper In Oil coupling capacitor
• Dual Nippon Chemicon B+ PSU capacitor for EL34
• Dual LSHC electrolytic for 6SL7
• Dual Sonicap for high frequency B+ filtering
• Pseudo choke input power supply
• 6SL7 drive EL34 / 6CA7

While working on the entry level EL34 amplifier, we need to start another project soon - Level 2 PCL85  single ended tube amplifier with ALIS-5SE Ultimate output transformer. This will be the highest end PCL85 ever built. We will share more when work starts.

Below are the Z11 power transformer and Z11 power choke that will be used for the Level 2 PCL85 amplifier.

Z11 B+ power transformer and power choke

Then after this will be our 300B Level 2.5 mono-blocks with Tung-Sol and Telefunken driver tubes down the road (Kev, yes, yours!). It's the busy time of the year... :)

9/8/2014
J&K Audio Design

Product Lists  
Level 0

Level 1: link 1, link 2, link 3

Level 2: link 1, link 2, link 3, link 4, link 5, link 6 

Level 3: depends on type, size and complexity. Email us for details.

Iso-trans: link 1, link 2

* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  

* Our product lines are always improving and increasing. If you do not see what you want, contact us!  

* Please email for volume discounts, distributor and OEM pricing.