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In Phase Car Audio XTB-828R Underseat Subwoofer – image 1In Phase Car Audio XTB-828R Underseat Subwoofer – image 2
In Phase

In Phase Car Audio XTB-828R Underseat Subwoofer

Variant: XTB-828R

£99.99
Car Audio Centre see shop

Up to £12.86 cheaper than the most expensive shop

Building the price history

We have only just started recording this price. After two weeks we will show here whether the current price is a good one.

Go to shop: Car Audio Centre 2 offers compared

2 offers compared

Sorted by total price including delivery
  1. Car Audio Centre Lowest price In Phase XTB-828R 8" 400W Active Subwoofer with Passive Radiator and Class D Amplifer
    ● In stock see shop
    £99.99
    Go to shop: Car Audio Centre
  2. PCHUB.UK In Phase Car Audio XTB-828R Underseat Subwoofer
    ● In stock see shop
    £112.85
    Go to shop: PCHUB.UK

Prices include VAT, last checked 11 October at 21:08. Prices may have changed since. Advertising: some shops pay Pricuro a commission when you buy through a link. Offers are ordered by total price only; used and refurbished offers come last.

Price history

£99.99£99.99£99.99 7 Oct8 Oct9 Oct11 Oct
Lowest price per day over 5 days.
Now
£99.99
Lowest
£99.99
Average
£99.99
Highest
£99.99

Product details

Product details
BrandIn Phase
CategoryPC components
Barcode (EAN)5060801411080
Manufacturer part numberXTB828R
Shops compared2
Price range£99.99 – £112.85
On Pricuro since7 October 2026

Description from the 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…

Read more

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 complete with a wiring kit apart from RCA cables. If fitting to an aftermarket headunit. you will need RCA cables

Frequently asked questions

Where is In Phase Car Audio XTB-828R Underseat Subwoofer cheapest?

Right now at Car Audio Centre for £99.99. We compare 2 offers.

How much does In Phase Car Audio XTB-828R Underseat Subwoofer cost?

Prices range from £99.99 to £112.85. Over the last 90 days it cost £99.99 on average.

Is now a good time to buy In Phase Car Audio XTB-828R Underseat Subwoofer?

Building the price history. We have only just started recording this price. After two weeks we will show here whether the current price is a good one.

Is In Phase Car Audio XTB-828R Underseat Subwoofer in stock?

Yes, 2 shops list it as in stock.

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