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Store Category

Nobsound & Douk Audio
Add-on Items
US Warehouse
- Add-on Items
- Amplifier
- Preamp & Phono Stage
- Headphone Amplifier
- DAC & Audio Adapter
- Audio Splitter/Switcher
- Music Spectrum & Clock
- Audio Accessories
- Other
UK Warehouse
- Add-on Items
- Digital Amplifier
- Tube Amplifier
- Hi-Fi Amplifier
- Preamp & Phono Stage
- Headphone Amplifier
- DAC & Audio Adapter
- Audio Splitter/Switcher
- Audio Processor
- Music Spectrum & Clock
- Record Player & Turntable Part
- Audio Board & DIY Kit
- Audio Accessories
- Other
DE Warehouse
- Add-on Items
- Digital Amplifier
- Tube Amplifier
- Hi-Fi Amplifier
- Preamp & Phono Stage
- Headphone Amplifier
- DAC & Audio Adapter
- Audio Splitter/Switcher
- Audio Processor
- Music Spectrum & Clock
- Aluminum Chassis
- Record Player & Turntable Part
- Audio Board & DIY Kit
- Radio Communication
- Audio Accessories
- Other
AU Warehouse
- Add-on Items
- Amplifier
- Preamp & Phono Stage
- Headphone Amplifier
- DAC & Audio Adapter
- Audio Splitter/Switcher
- Music Spectrum & Clock
- Audio Accessories
- Other
Digital Amplifier
- Multi-Function
- Mono Channel
- 2.0 Channel
- 2.1 Channel
- 4.0 Channel
- 5.1 Channel
Tube Amplifier
- DIY Kit
- Hybrid Amplifier
- Mini Tube Amplifier
- EL34 Tube Amplifier
- KT88 Tube Amplifier
- 300B Tube Amplifier
- Other Tube Amplifier
Audio Amplifier
- Mini Amplifier
- Integrated Amplifier
- Power Amplifier
- Audio Board & DIY Kit
Preamp & Phono Stage
- Tube Preamp
- Digital Preamp
- Phono Preamp
- Passive Preamp
- Audio Board & DIY Kit
Headphone Amplifier
- Mini Headphone Amp
- Desktop Headphone Amp
- Portable Headphone Amp
- Tube Headphone Amp
DAC & Audio Adapter
- Audio Adapter
- USB DAC
- Bluetooth Receiver/Transmitter
- Digital Interface
- Audio Board & DIY Kit
Audio Splitter/Switcher
- Speaker Switcher
- Bluetooth & XLR & MIC
- 2 Way
- 3 Way
- 4 Way
- Multiple Way
Audio Processor
- Guitar Effects
- Equalizer
- Audio Mixer
- Noise Isolator
Audio Player
- Digital Player
- Record Player
- CD Player
- Portable Player
Music Spectrum & Clock
- Analog VU Meter
- Tube Sound Level Meter
- LED Sound Level Meter
- VFD Audio Spectrum
- LED Clock
- Nixie Tube Clock
- VFD Tube Clock
- IPS Nixie Clock
- Oscilloscope Tube Clock
- Board & DIY Kit
- Other
Empty Chassis
- Small-sized
- Medium-sized
- Large-sized
- Personalized
Record Player & Turntable Part
- Set-up Transformer
- Record Weight & Clamp
- Cleaning Kit
- Scale Gauge
- Platter Mat
- Dust Cover
- Needle
- Other
Power Supply
- Linear Power Supply
- Switching Power Supply
- Power Supply Filter
- USB Charging Hub
- Board & DIY Kit
Vacuum Tubes
- Shuguang Tube
- PSVANE Tube
- Tube Socket
- Tube Tester Probe
Hi-Fi Speakers
- Frequency Divider
- Speaker Unit
Hi-Fi Cable
- RCA Audio Cable
- 1/8 & 1/4 Stereo Jack Cable
- Speaker Cable
- USB Cable
- Optical Fiber Cable
- Conversion Cable
- Dock Cable
- Other
Transformer
- Toroidal transformer
- Output Transformer
- Other
Radio Communication
- Tesla Coil
- Transmitter & Receiver
- Signal Generator
- Antennas & Tuners
- Shortwave Radios
- Ham Amateur Radio
Audio Accessories
- Volume Controller
- Mount Stand Bracket
- Feet & Pads
- Op Amp
- Headphone
- Current Meter
- Other
Other

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Item description

Technique Index

Low Distortion: 0.0008%
High Speed: conversion rate(120V/us) and bandwidth(8MHz)
Low Noise: 4nV/√Hz
High open-loop gain: 120dB(600Ω)
BJT Input: IB =30pA
Power Range: ±12V-±18V (standard ±15V)

Application Area

all kinds of audio pre-amplifiers, headphone amplifiers, integrated amplifiers, DAC filter circuit, electronic crossovers, active filters and so on

Features of sound quality

Loose sound filed and transparent background.
Mellow, touching and humanized.
The whole frequency band is very average with accurate and soft high frequency, full mid-frequency, flexible and strong low frequency. The sound is near to gallbladder machine and LP records.

Production and processing

All products adopt designed twin transistors to assure current of all transistors consistent.

Packing List

1× Discrete Dual Op Amp

We have many kinds of op amps, please click the LINKs for more information:

Model	Type	Price(US dollar)	ebay LINK
SX52B	Discrete Dual Op Amp	17.99	https://www.ebay.com/itm/273323782606
SX45A	Discrete Single Op Amp	18.99	https://www.ebay.com/itm/273323771373
SX45B	Discrete Dual Op Amp	26.99	https://www.ebay.com/itm/253714210210
SX52A	Discrete Single Op Amp	13.99	https://www.ebay.com/itm/263781921954
SX33A	Discrete Single Op Amp	15.99	https://www.ebay.com/itm/264136998367
SX33B	Discrete Dual Op Amp	21.99	https://www.ebay.com/itm/273655982180
SX35A	Discrete Single Op Amp	24.99	https://www.ebay.com/itm/254070663451
SX35B	Discrete Dual Op Amp	42.99	https://www.ebay.com/itm/264137246912
SX22A	Discrete Single Op Amp	41.99	https://www.ebay.com/itm/264137278226
SX22B	Discrete Dual Op Amp	76.99	https://www.ebay.com/itm/264137344322

Payment Delivery details Return Policy About us Contact us

Payment

Safe and secure payment by PayPal.

Delivery details

Please leave VALID TELEPHONE NUMBER which is necessary and very important.

Customs Clearance
We are NOT responsible for any customs duties fee.

We are NOT responsible for any import tax or customs delay.

Most item will be shipped within 2 working days. For package less than 2KG, we use Airmail (10-25 days to most countries) and for package over than 2KG we use Expedited Service such as DHL, UPS and FEDEX (5-8 days to most countries).

Return Policy

Free Return Within 30 Days

We provide return within 30 days for all items you bought on eBay, full refund and return shipping will be provided.

1-year warranty is provided for all items(Excluding: 1. Man-made damage or misuse. 2. Audio accessories and consumables such as vacuum tubes).

If you are satisfied with our products and service please leave a 5-star Star Star Star Star Star . Feedback is very important to us just like our lives, please DO contact us before you leave a neutral or negative feedback, we will provide better solutions until you are satisfied.

About us

Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including Douk Audio / Nobsound / Little Bear etc.

As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable.

We will spare no efforts to bring great products and service for customers and extremely to improve our customers’ listening experience.

Please don't hesitate to contact us if you have any questions or comments about our items. And our working time is from Monday to Friday between 9:00 am to 06:00 pm(Beijing Time), which means we can keep on-line at:

	Working time
Beijing(CN)	Monday-Friday	09:00 AM - 18:00 AM
New York(US)	Sunday to Thursday	08:00 PM - 05:00 AM
London(UK)	Monday-Friday	01:00 AM - 10:00 AM
Paris(FR)	Monday-Friday	02:00 AM - 11:00 AM

During holiday, please allow us to response you early next week. Please don't leave any negative / neutral feedback or make dispute/claim on our non-working time, thank you for your understanding and cooperation.