# Headphone Amplifier InLine 33057I

**URL:** https://aio.lv/en/product--inline-33057i--1076967
**Data updated:** 2026-01-03 12:46 (EET)
**Category:** Headphones
**Manufacturer:** InLine
**Manufacturer code:** 33057I
**EAN:** 4043718237029
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 44.99 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 37.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-33057i--1076967

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

The InLine Bass Boosting Dual Output Headphones Amplifier features a signal-to-noise ratio of 90 dB, ensuring high-quality sound. With a 3.5mm headphone connectivity, it is compatible with most devices. The 200 mAh battery provides up to 8 hours of usage, making it perfect for on-the-go listening. Enjoy enhanced bass and dual output for a richer audio experience.

## Long description

The InLine Headphone Amplifier 33057I is a compact portable audio amplifier designed to improve sound quality and bass performance for headphones and earphones. Featuring dual output and a 3.5 mm connection, it is compatible with most mobile devices and audio players. The built-in 200 mAh Lithium Polymer battery provides up to 8 hours of playback, making the unit suitable for use on the go. Note: the operating instructions reference a third-party site called 'Drivers-Download' which is unrelated to the manufacturer and is known to be misused for phishing; using that site is not recommended.
Advantages
The amplifier offers Hi‑Fi grade audio performance with a signal-to-noise ratio of 90 dB and a bass-boosting function to enrich low frequencies. Dual 3.5 mm outputs allow two listeners to share audio simultaneously. Its rechargeable Lithium Polymer battery supports long playback times and the compact black housing ensures easy portability.
Suitable for
Mobile listening with headphones and earphones
Sharing audio between two listeners via dual outputs
Improving bass response on smartphones, tablets and portable players
Key specifications
Model: InLine 33057I
Connectivity: 3.5 mm headphone jack (dual output)
Signal-to-noise ratio: 90 dB
Battery: 200 mAh Lithium Polymer, rechargeable
Playback time: up to 8 hours
Colour: Black
Manufacturer part number (MPN): 33057I
EAN: 4043718237029
How to use
Charge the amplifier fully before first use using the supplied charging cable. Connect headphones or earphones to the 3.5 mm output(s) and plug the amplifier into the audio source via its 3.5 mm input. Use the device controls to enable bass boost or adjust volume according to your preference. When not in use, power the unit off to conserve battery.
Usage recommendations
Do not follow instructions on third-party sites referenced in the included manual (for example 'Drivers-Download'); these sites are not associated with the manufacturer and have been reported for phishing. Charge the device with the supplied cable and avoid using unknown chargers. Keep the amplifier dry and store it at moderate temperatures.

## Specifications

| Feature | Value |
|---|---|
| Line-out | Yes |
| Audio (L/R) in | 1 |

### Performance

| Feature | Value |
|---|---|
| Product colour | Black |

### Other features

| Feature | Value |
|---|---|
| Signal-to-Noise Ratio (SNR) | 90 dB |
| Headphone connectivity | 3.5mm |
| Battery life | 8 h |

### Battery

| Feature | Value |
|---|---|
| Battery capacity | 200 mAh |

### Supplier features

| Feature | Value |
|---|---|
| Adjustable volume | Yes |

## FAQ

### How much does the Headphone Amplifier InLine 33057I cost, and is it available for purchase?

The price is 44.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 94 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 29.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All InLine products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized InLine service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Headphone Amplifier InLine 33057I?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1076967/64133534_large.webp