# In Phase Car Audio XTB-828R Underseat Subwoofer

> Price comparison in United Kingdom (GBP). Lowest price right now: **£99.99** at Car Audio Centre, in stock. 2 offers from 2 shops, prices from £99.99 to £112.85. Checked 2026-10-12T01:13:39Z.

## Product
- Brand: In Phase
- Category: [Computers & accessories](https://pricuro.com/uk/computers.md) > [PC components](https://pricuro.com/uk/computers/pc-components.md)
- EAN/GTIN: 5060801411080
- Manufacturer part number: XTB828R
- Page: https://pricuro.com/uk/p/in-phase-car-audio-xtb-828r-underseat-subwoofer-16344912
- Image: https://pricuro.com/img/16344912/800/in-phase-car-audio-xtb-828r-underseat-subwoofer.webp

## Offers (2, sorted by total price incl. delivery; used/refurbished last)

| # | Shop | Price | Delivery | Total | Availability | Condition | Buy |
|---|---|---|---|---|---|---|---|
| 1 | Car Audio Centre | £99.99 | see shop | – | in stock | new | https://pricuro.com/go/43300850 |
| 2 | PCHUB.UK | £112.85 | see shop | – | in stock | new | https://pricuro.com/go/43025790 |

## Price history (lowest price per day in United Kingdom, tracked since 2026-10-07, 6 days)

- Lowest price today: £99.99
- Last 30 days: lowest £99.99, highest £99.99, average £99.99
- All-time low on Pricuro: £99.99 (2026-10-07)
- Note: the history is still short, so it does not yet show whether today's price is a good one.

| Date | Lowest price |
|---|---|
| 2026-10-07 | £99.99 |
| 2026-10-08 | £99.99 |
| 2026-10-09 | £99.99 |
| 2026-10-10 | £99.99 |
| 2026-10-11 | £99.99 |
| 2026-10-12 | £99.99 |

## Specifications


Description (from a shop): The In Phase Car Audio XTB-828R Underseat Subwoofer is a passive radiator equipped active sealed subwoofer enclosure. Hit really low frequencies and experience true bass accuracy not normally found in bog-standard active subwoofer. Equipped with an all weather glass fibre woven cone 20cm (8") drive unit. paired with a passive radiator in sealed enclosure technology. it provides deep and controlled bass frequencies. Its built-in 400W class D amplifier offers high power handling and numerous controls.XTB-828R has high and low level inputs that can be plugged with after market and OEM headunits.This FOUR-in-one enclosure reduces overall dimensions while offering a great bass level. This comes c…

## Other variants

- [In Phase Car Audio USW300 Underseat Subwoofer](https://pricuro.com/uk/p/in-phase-car-audio-usw300-underseat-subwoofer-16344502.md) – from £98.91

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Source: Pricuro (https://pricuro.com), an independent price comparison for United Kingdom. Canonical page: https://pricuro.com/uk/p/in-phase-car-audio-xtb-828r-underseat-subwoofer-16344912
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