- Nanocrystalline double C core, Level 3 (U$1390 per matched pair)
- Single Ended Output Transformer, single tube use (PSE option available)
- Output power: 70W @ 20Hz (higher power available per request)
- Measured frequency response
- 20Hz (-0.2dB) – 1kHz (0dB) – 20kHz (-0.4dB), 8 Ohm, 1W
- Full bandwidth: 5Hz – 70kHz -3dB
- Primary impedance: 5KΩ，secondary: 0-6-8Ω (or 0/4/8, or 0/8/16, or user defined)
- Primary DCR: 130.1Ω （130.2Ω）（B-P，26℃）
- Secondary DCR: 0-6Ω tap - 0.27Ω，0-8Ω tap - 0.31Ω
- Primary inductance: 28.9H（28.1）（measured at primary current 150mA，20Hz，5Vrms）
- Primary current: 280mA (absolute maximum), recommended (optimal) at 150mA
- For 212 PSE, will be 300mA (or user defined)
- Efficiency：0-6（>93%），0-8（>93%）
Note: for customers ordering from us, please specify the ACTUAL running idle current to us. Please do not buffer the idle current since our transformers are designed to work at +20% over specifications. Buffering will cause the bandwidth to be less that ideal, especially for single ended output transformers with core air-gap.
Matching results:
- Primary DCR <2%（0.2Ω）
- Primary inductance <5%（0.9H）
5Hz – 70kHz +/- 3dB (ruler flat from 20Hz to 20kHz)
Note: 212 output transformer bandwidth can be tailored according to customer preference (with a price). If customer has no preference, we will optimize it to the best possible specifications.
J&K Audio Design
9/13/2015
Product Lists
Level 0
Level 3: depends on type, size and complexity. Email us for details.
* 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.
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