Lehmann Audio Linear USB II Headphone Amplifier
- Free Mainland UK Shipping on orders over £100
- Official Hi-Fi Retailer since 1973
- Usually in stock and dispatched in 1-5 working days
We offer free delivery on all orders over £100 to mainland UK. Orders under £100 are subject to a £6.50 shipping charge.
Delivery is available across mainland UK. If you are located outside mainland UK and would like a shipping quote, please get in touch before placing your order.
We aim to dispatch in-stock items as soon as possible provided that we physically have the stock - but please note that sometimes we have to order from our supplier for certain products, in which case delivery should take place within 1-5 working days of the order being placed.
Tracking details or estimated delivery timescales will be provided once your order has been processed. If there are any delays due to stock availability, we will contact you as soon as possible with the option to wait or receive a full refund.
Please note that certain products may be subject to specific distance selling or delivery regulations. If you are unsure about a product or its delivery terms, we recommend contacting us before purchase.
You can cancel your order within 14 days of receiving your goods, in line with UK distance selling regulations. Once you’ve notified us, you have a further 14 days to return the item. Please contact us by email, phone or in writing before sending anything back.
Items must be returned in original condition and packaging, including all accessories, manuals and any promotional items. The cost of return is your responsibility and we strongly recommend insuring the goods, as refunds cannot be issued for damaged or incomplete returns. If items show excessive handling, are missing components, or cannot be resold as new, a reasonable deduction may be made.
Please note that used headphones (for hygiene reasons) and custom or special-order items cannot be returned. If you need assistance arranging a return, we’re always happy to help.
Product Summary
The Lehmann Audio Linear USB II is a premium headphone amplifier, USB DAC and streaming preamplifier designed for listeners who want serious private listening performance alongside flexible digital and analogue connectivity. It builds on the long-standing reputation of the Linear platform while adding a high-quality USB stage for customers who want to connect a computer or compatible digital source directly.
What makes the Linear USB II especially appealing is the way it combines sound quality with real-world usability. It can work as a dedicated headphone amplifier for a wide range of headphones, but it also adds USB audio input and preamp functionality, making it a strong choice for desktop systems, active speaker setups and compact high-end listening spaces.
The Linear USB II is also designed to stay simple and enjoyable to use. It automatically detects an incoming USB audio signal, offers selectable gain for better headphone matching, and provides two parallel headphone outputs for shared listening. It is an excellent choice for customers who want a high-end headphone amp with built-in USB convenience and wider system flexibility.
Key Benefits
- High-end headphone amplifier with built-in USB DAC and streaming preamplifier functionality
- Ideal for customers who want better sound from a computer-based or USB-connected music source
- Selectable gain makes it easier to match the amplifier to different headphone sensitivities
- Automatic USB signal detection keeps everyday use simple
- Two parallel headphone outputs allow two listeners to plug in at once
- Pre-out connections add useful flexibility for active speakers or wider system integration
- Compact casework makes it easy to use on a desk, shelf or hi-fi rack
- Strong option for customers who want a serious headphone amplifier without losing digital convenience
- 2 years manufacturers' warranty
Technical Specifications
Amplifier & DAC Design
- Product Type: Headphone amplifier with USB DAC and streaming preamplifier functionality
- Input Impedance: 47 kOhm
- Maximum Gain: 0 dB, 10 dB, 18 dB, 20 dB selectable via DIP switches
- Frequency Response: 10 Hz (-0.3 dB) to 35 kHz (-1 dB)
- Signal-to-Noise Ratio: More than 95 dB at gain 0 dB
- THD: Less than 0.001%
- Channel Separation: More than 70 dB at 10 kHz
Inputs & Outputs
- Analogue Input: 1 x stereo RCA input pair
- USB Input: 1 x USB Type-B
- Headphone Outputs: 2 x 6.35 mm headphone outputs
- Pre-Out: 1 x stereo RCA output pair
- Output Impedance: 50 Ohm pre-out, 5 Ohm headphone output
Output Power
- Output Power: 400 mW into 60 Ohm
- Output Power: 200 mW into 300 Ohm
Finish Options
- Silver front with black case
- Black front with black case
Power & Physical
- Power Consumption: 10 W
- Dimensions (W × D × H): 110 x 280 x 50 mm
- Weight: 1.5 kg
What’s in the Box
- Lehmann Audio Linear USB II headphone amplifier
- Power cable
- User manual
