Nobsound NS-08E Valve Tube Headphone Amplifier User Manual
- June 14, 2024
- Nobsound
Table of Contents
NS-08E Valve Tube Headphone Amplifier
PRODUCT INFORMATION
Warm Tips
- This is a tube headphone amplifier that greatly improves sound quality for headphones. It can also be used as a tube preamp. The 3.5mm headphone jack can also connect to an amplifier or active speakers.
- Default vacuum tubes are 6J3, but they can be directly replaced by the following models: 6J1, 61, 6AK5, 6BC5, 403A/B, 5654, EF95, CV850, 6J2, 62, 6AS6, CV2522, CV4011, 6J3, 63, EF94, CV848a6BC6, 6AG5, 6J4, 64, 6136, 6BX6, 6AC7, 6AU6, 6J5, 65, CV2521, 6F36, 6AH6, 6AN5, 6K4, EF93, 6K5, 6K4, 6BA6, 6DA6, and 5749.
How to Use
- Connect an audio source such as a phone, MP3 player, TV, tablet, computer, or CD player to the 3.5mm AUX input of NS-08E.
- Connect headphones or a power amplifier or active speaker to the 3.5mm output of NS-08E. We recommend using a high-quality 3.5mm cable.
- Connect the power adapter to NS-08E and then plug it into a power socket.
- Press the red button on the back panel to power the device and let it warm up for a while.
- Play music on your audio device and adjust the volume control to achieve the desired volume for an enjoyable HiFi music experience.
Parameters
- Audio input: 3.5mm AUX
- Audio output: 3.5mm headphone jack
- Max output power: 1100 mW (32 ohm)
- Matched Headphone impedance: 18-600 ohm
- Frequency Response: 20Hz – 30KHz
- THD : (not provided in the text)
Warm Tips
- This is a tube headphone amplifier that can greatly improve the sound quality for headphones, but also can be used as tube preamp, its 3.5mm headphone jack also can connect amplifiers or active speakers.
- Default 6J3 vacuum tubes also can be directly replaced by the following models 6J1, 6ж1П, 6AK5, 6BC5, 403A/B, 5654, EF95, CV850, 6J2, 6ж2П, 6AS6, CV2522, CV4011, 6J3, 6ж3П, EF94, CV848、 6BC6, 6AG5, 6J4, 6ж4, 6136, 6BX6, 6AC7, 6AU6, 6J5, 6ж5П, CV2521, 6F36, 6AH6, 6AN5, 6K4, EF93, 6K5, 6K4П, 6BA6, 6DA6, 5749.
How to Use
- Connect audio source such as phone, MP3, TV, tablet, computer, CD player, etc. to 3.5mm AUX input of NS-08E, and connect headphone or power amplifier or active speaker to its 3.5mm output. Recommend high-quality 3.5mm cable.
- Connect the power adapter to NS-08E and then connect the power adapter to the socket.
- Press the red button on the back panel to power it on and warm up for a while.
- Play music on your audio device, rotate the volume control to adjust the volume until perfect, and enjoy HiFi music.
Parameters
- Audio input : 3.5mm AUX
- Audio output: 3.5mm headphone jack
- Max output power: ≥1100 mW (32 ohm)
- Matched Headphone impedance: 18-600 ohm
- Frequency Response : 20Hz – 30KHz
- THD : <0.005%
- SNR : ≥110 dB
- Power supply : DC 6V /2A
Warm Tips
- Not include power adapter, recommend using an original high-quality power adapter (DC5V/≥2A ). U10 won’t work normally if the current is below 2A.
- Inputs (3.5mm / RCA) and outputs (6.35mm/3.5mm jack) are connected in parallel, in other words, all inputs and outputs work simultaneously. Don’t connect 3.5mm and RCA inputs at the same time, or else audio signals will be mixed.
- Pluggable tube socket design, 6A2 can be replaced by the following models: 6J1, 6ж1П, 6AK5, 6BC5, 403A/B, 5654, EF40, EF95, CV850, 6J2, 6ж2П, 6AS6, CV2522, EF11/732, CV4011, 6J3, 6ж3П, EF96, CV848, 6BC6, 6AG5, 6J4, 6ж4, 6136, 6BX6, 6AC7, EF94, 6AU6, 6K4, 6K5, 6K4П, 6BA6, 6DA6, EF89/93, 5749.
- U10 can easily drive all headphones even with high-impedance such as HD580/HD600/HD650/ K701/K702/Q701 / DT880/T70/T90 / SR225/SR325/RS1e etc.
Introduction
U10 mini headphone amplifier, with stereo 3.5mm AUX and RCA inputs and dual headphone jacks (3.5/6.35mm) output up to 1100mW, easily drives all 18-600Ω headphones; Innovative built-in voltage boost circuit, U10 always works at a high voltage of 24V even only powered by DC 5V, 2PCS 6A2 tubes are adopted to soften and warm the audio, both tubes and op amps use pluggable sockets, convenient for tube rolling, op-amp upgrading, and sound-shaping.
How to Use
- Connect the power adapter and U10 via the default USB to the DC cable first, then insert the power adapter into the socket.
- Connect 3.5mm or 6.35mm headphone to the output of U10.
- Correctly connect your audio source to the corresponding inputs of the U10 amp with high-quality 3.5mm AUX cable or RCA cable.
- Clockwise rotate the main knob to turn U10 on.
- Play music on your audio source, you can turn up or down the volume via the volume knob.
- After use, please anti-clockwise the knob to the leftmost end until U10 is turned off, then disconnect the power adapter.
Parameters
- Brand: Douk Audio
- Model: U10
- Audio input: 3.5mm AUX / Stereo RCA
- Audio output: 3.5mm / 6.35mm headphone jack
- Frequency response: 20Hz-30KHz
- Output power: ≥1100mW (32Ω)
- Matched headphone impedance: 18-600Ω
- Signal-to-noise ratio: ≥110DB
- Input voltage: DC 5V (≥2A)
- Working voltage inside: DC 24V
- Dimensions (WDH): 95mm69mm30mm / 3.74in2.72in1.18in
- Net weight: 200g / 0.44lb
Front and Back Panel
Contact Information
- Website: www.doukaudio.com
- Email: nobsound@doukaudio.com
- WeChat / Whatsapp: +86-17704028602
- Address : Room 1329, Wang Cheng Building, Long Guan East Road, Long Hua District, Shen Zhen, Guang Dong, China, 518000C
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