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Product Introduction:
1.Power Supply Voltage: defaults double AC 18V/3A, power more than 60W (the maximum voltage should be no more than double AC 19V, and it should be no less than 18V; or the digital tube will be off, and the voice will get distorted; if you want to use AC 12V, you need to modify lamp filament buck resistance 2.2 ohm; then the amplifier output power will be relatively low).
2.Headphone amplifier/pre-output: amplification times is 0.8
Im1875t amplifier output power: typical 20W (max 30W)
3.Loudspeaker impedance: 4-8 ohm
4.Total harmonic distortion: <0.04%
5.Signal noise ratio: 105dB
6.Frequency response: 14Hz-100KHz
Component List:
| NO. | Components | Silk Screen | Parameter | QTY |
| 1 | Metal Film Resistor | R1,R3,R10,R13,R17,R18,R20,R21 | 4.7K | 8 |
| 2 | Metal Film Resistor | R2,R4,R30,R31 | 1K | 4 |
| 3 | Metal Film Resistor | R5-R8 | 47ohm | 4 |
| 4 | Metal Film Resistor | R22,R23 | 56K | 2 |
| 5 | Metal Film Resistor | R11,R14 | 470K | 2 |
| 6 | Metal Film Resistor | R12,R15 | 200ohm | 2 |
| 7 | Metal Film Resistor | R9 | 3W 47ohm | 1 |
| 8 | Metal Film Resistor | R16,R19 | 100K | 2 |
| 9 | Metal Film Resistor | R24,R26,R27,R32 | 22K | 4 |
| 10 | Metal Film Resistor | R25,R28 | 10ohm | 2 |
| 11 | Electrolytic Capacitor | C13,C14 | 47uf 10V | 2 |
| 12 | Electrolytic Capacitor | C1-C4 | 2200uf 25V | 4 |
| 13 | Electrolytic Capacitor | C5-C8 | 470uf 35V | 4 |
| 14 | Film Capacitor | C15,C16 | 0.1uf 50V | 2 |
| 15 | Film Capacitor | C9-C12 | 1uf 50V | 4 |
| 16 | LM1875T | U1,U2 | TO-220-5 | 2 |
| 17 | D667 Transistor | Q1,Q4 | TO-92 | 2 |
| 18 | D647 Transistor | Q2,Q3 | TO-92 | 2 |
| 19 | Audio Socket | J3,J4 | 3.5mm | 2 |
| 20 | Terminal | J1,J2 | KF301-2P | 2 |
| 21 | Terminal | J5 | KF301-3P | 1 |
| 22 | LED | D1,D2 | 3mm | 2 |
| 23 | Rectifier Bridge | P1 | KBJ608 | 1 |
| 24 | Potentiometer | RP | 50K | 1 |
| 25 | Screw | M3*5mm | 2 | |
| 26 | Screw | M3*6mm | 2 | |
| 27 | Isolation sheet | M3 | 2 | |
| 28 | Heat Sink | 1 | ||
| 29 | Thermal Grease | 1 | ||
| 30 | Nut | 1 | ||
| 31 | 6J1 Electronic Tube | 2 | ||
| 32 | 6J1 Socket | 2 | ||
| 33 | T0-220 Insulation film | 2 | ||
| 34 | PCB | 1 |
Finished Product Picture:
Please Download the Diagram here:
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I. Tested by ICStation's Outstanding Partner arduinoLab:
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Learn More Details in Below Video:
(The language in the video is Russian)
II. Tested by ICStation's Outstanding Partner 12voltvids:
Learn More Details in the Video:
(The language in the video is English)
III. Tested by ICStation's Outstanding Partner Mundo Electrónica:
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Learn More Details in the Video:
(The language in the video is Spanish)
| Quantity | 5+ | 10+ | 30+ |
| Price | $13.20 | $12.90 | $12.50 |
Date Added: 2022-04-26 09:36:04
Date Added: 2022-03-27 23:23:47Nice amplifier for my STAX Electrostatic headphone SX34. Amplifier has enough power to drive the transformator for de elctrotatic Headphone. Sounds super.
Date Added: 2020-03-15 13:18:20
Date Added: 2018-07-21 04:41:02
Date Added: 2017-08-23 20:41:49
First we should say that ICStation doesn't accept any form of pay on delivery.Items used to be shipped after receiving the order info and payment.
1) Paypal Payment
PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account).
We are PayPal Verified 
2) West Union
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We know that some of you do not have the Paypal account.
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Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$500. The bank will charge about US$60 for the transfer fee if we do the payment in these ways.
For other payment method, please contact us at orders@icstation.com for more details.
1. Yanwen / YunExpress / 4PX / China Post Airmail Service
(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $5 is for tracking number and delivery insurance ^0^ Enjoy order from us.
Free Shipping for all orders over $20 ^0^ (with free tracking number and delivery insurance fee)
(2) Shipping time
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location.
7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries
2. DHL/FedEx Express
(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG
When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country.
Asia: Japan , South Korea , Mongolia . Malaysia , Singapore , Thailand , Vietnam , Cambodia , Indonesia , Philippines
Oceania: Australia , New Zealand , Papua New Guinea
Europe& America: Belgium, Britain, Denmark, Finland, Greece, Ireland, Italy, Luxembourg, Malta, Norway, Portugal, Switzerland, Germany, Sweden, France, Spain, USA, Austria, Canada
Note: Shipping Fee to other countries, please contact orders@ICStation.com
(2) Shipping Time & Delivery Time
Because the package would be returned to the sender if it had not been signed by the receiver , please pay attention to the arriving time of the package.
Note:
1) APO and PO Box Addresses
3. Note
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed.
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc.
3) Once your order is shipped, you will receive an email notification from icstation.com
4) Track the order which with tracking number via below links:
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