# Audio adapter Hosa GPM-179 — 3.5 mm TR (male) to 1/4 in TS (male), black

**URL:** https://aio.lv/en/product--hosa-gpm-179--5017187
**Data updated:** 2026-03-11 11:49 (EET)
**Category:** Other goods
**Manufacturer:** Hosa
**Manufacturer code:** GPM-179
**EAN:** 728736014084
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hosa-gpm-179--5017187

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Hosa GPM-179 is a compact audio gender changer that converts between a 3.5 mm TR connector and a 1/4 in TS connector. Finished in black, it links devices with different mono/stereo jack formats for connection of headphones, instruments, mixers or consumer audio gear. Useful for adapting personal audio equipment to pro or semi‑pro setups.

## Long description

Hosa GPM-179 is a compact audio adapter that converts a 3.5 mm TR (mini phone) plug to a 1/4 in TS (mono phone) plug. Designed to adapt a mini stereo phone plug to a mono phone output, this adapter routes the stereo left and right channels into a single mono signal. Its black finish and metal shell provide a discreet, durable connection for linking headphones, instruments, portable players and consumer audio equipment with pro or semi‑pro gear.
Advantages
The adapter provides a simple, passive conversion between 3.5 mm TR and 1/4 in TS connectors without requiring additional cables or powered converters. It preserves signal continuity while summing stereo channels into mono so that both left and right signals are present at the mono output. The compact, robust construction makes it suitable for mobile use and studio patching where space is limited.
Suitable for
Connecting portable audio players or smartphones to a mono instrument or mixer input
Adapting stereo headphone outputs for use with mono amplifiers or PA channels
Linking keyboards, drum machines or other consumer devices to guitar amps or mono DI inputs
Temporary studio patching and live sound setups requiring a mini‑to‑phone conversion
Key specifications
Connector A: 3.5 mm TR (mini phone), male
Connector B: 1/4 in TS (mono phone), male
Function: stereo-to-mono summing (applies mono equally to left and right)
Finish: black
Construction: compact, passive adapter (no active electronics or power required)
How to use
Insert the 3.5 mm TR male end into the source device's headphone or line output and plug the 1/4 in TS male end into the destination mono input, amplifier or mixer channel. Because the adapter passively sums stereo channels to mono, ensure source volume levels are set appropriately to avoid overloading the receiving input. Remove the adapter when not in use to protect connector contacts and prevent accidental damage.
Usage recommendations
Use this adapter for signal routing and temporary connections; it is not a substitute for balanced or dedicated stereo-to-mono summing circuits when channel separation or impedance matching is required. For permanent installations or where level matching is critical, consider using a proper summing device or a DI with stereo-to-mono capability.

## Specifications

| Feature | Value |
|---|---|
| Plug and Play | Yes |
| Product colour | Black |
| Connector 1 | 3.5 mm TR |
| Connector 2 | 1/4 in TS |
| Connector 1 form factor | Straight |
| Connector 2 form factor | Straight |
| Connector 1 gender | Male |
| Connector 2 gender | Female |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Hosa GPM-179 audio adapter 3.5 mm TR to 1/4" TS cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 15.07.2026 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 Hosa 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 Hosa 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

## Image

https://aio.lv/img/cache/product/5017187/59274634_large.webp