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What is B-Grade?

B-Grade includes used and unused returned products, end of line, slightly marked or refurbished products.

To ensure peace of mind each product comes with our 12 month guarantee having been fully tested by our team of in-house technicians.

What's even more attractive, all of the B-Grade products are reduced in price!

B GRADE IS ONLY AVAILABLE VIA THE WEBSITE

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Terms & Conditions

Bass Reflex Tubes

Bass Reflex 35.5mm

Bass Reflex 35.5mm

KS85G

Order Code: KS85G

Home Delivery

While stocks last

Can be delivered from store within 90 minutes

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ONLY GBP£3.69

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Bass Reflex 52.5mm

Bass Reflex 52.5mm

KS84F

Order Code: KS84F

Home Delivery

In stock

Can be delivered from store within 90 minutes

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ONLY GBP£3.79

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Bass Reflex 40.5mm

Bass Reflex 40.5mm

KS86T

Order Code: KS86T

Home Delivery

In stock

Can be delivered from store within 90 minutes

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ONLY GBP£3.79

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Bass Reflex 45.0mm

Bass Reflex 45.0mm

L99AB

Order Code: L99AB

Home Delivery

In stock

Can be delivered from store within 90 minutes

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ONLY GBP£3.79

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Bass Reflex 65.0mm

Bass Reflex 65.0mm

L00AC

Order Code: L00AC

Home Delivery

In stock

Can be delivered from store within 90 minutes

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ONLY GBP£4.29

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Bass Reflex 54.7mm

Bass Reflex 54.7mm

KS87U

Order Code: KS87U

Home Delivery

In stock

Can be delivered from store within 90 minutes

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ONLY GBP£4.29

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Bass Reflex 70.0mm

Bass Reflex 70.0mm

QQ65V

Order Code: QQ65V

Home Delivery

Out of stock - due in 30 days

Can be delivered from store within 90 minutes

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ONLY GBP£4.29

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  • Built-in grill on inner end prevents the entry of large foreign objects
  • Clever moulding means that these can be permanently mounted with a simple push fit
  • Precisely designed curve reduces imperfections in air flow and audio heard

For home constructors of speaker cabinets, these plastic tubes are essential. Attractively manufactured in a black ABS material, these tubes are required as the ports in reflex design.

Customers also looked for:

Bass Reflex Tubes
Order Code Port Cutout Flange Length
dia. dia. dia.
KS85G 35.5mm 39.7mm 58.7mm 81.3mm
KS84F 52.5mm 56.8mm 75mm 81.1mm
KS86T 40.5mm 45mm 61.8mm 121.5mm
L99AB 45mm 50mm 68.6mm 121.4mm
KS87U 54.7mm 59.6mm 71.5mm 129mm
L00AC 65mm 70mm 88.4mm 127.8mm
QQ65V 70mm 85mm 96.5mm 128mm
one text, video or picture review per month will win a £50 gift card

Customer Reviews for Bass Reflex Tubes

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Customer Questions about Bass Reflex Tubes

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Q: just a quick question on the bass reflex ports, are they RoHS compliant please as we are using them in our new product which is going on sale in Jan 2008.

andrew farrington - 08/12/2007

Maplin says: Yes they are.

We've had no feedback about this question yet.

No » « Yes

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Close Weave Loudspeaker Grille Cloth

• Acoustically transparent • Made from non-flammable 100% polyester

On promotion

from £2.99

more info »

Round Loudspeaker Grilles

• Range of protective speaker grills for custom made enclosures • Matt black finish with PVC edge strip • Available in the following diameter sizes: 254 and 457mm (10 and 18in.) diameter • Can be used with FJ40T speaker clamps

from £7.49

more info »

Fine Speaker Grills

These fine mesh speaker grilles are available in four sizes, 6” (MY44X), 8” (KS74R), 10” (KS75S), 12” (KS76H).

from £4.49

more info »

Metal Speaker Clamp Kit

A sturdy loudspeaker clamping kit comprising four 38mm long bolts, four T-nuts and four speaker clamps in 3mm thick steel. The kit may be used without the clamps to fix 10in. or 12in. speakers to the front or the rear of a baffle using the holes in the speaker chassis. The T-nuts require holes in the baffle of 9.5mm (3½8in.) clearance into which they can be tapped home lightly with a hammer. Alternatively the speaker chassis can be gripped on four points around the edge by the right-angled clamp

only £5.99

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Shop With Confidence

We offer a 28 day returns policy. We want our customers to be 100% satisfied every time they shop with us, should you change your mind we are here to help.

If you are not completely satisfied with your purchase, you can return the item to us in its original condition within 28 days of receipt and we will issue a full refund, or replace the item, if preferred.

We offer two ways to return a product either visit any one of our stores nationwide or by post which ever you prefer. For further information about our returns policy visit our help page if you wish to return an item please visit our returning an item help page.

Delivery Options

United Kingdom Options

Price Option Delivered
FREE Reserve for store pickup Ready for collection within 20 minutes✝
FREE all orders over £150 1 - 3 Working days
FREE all orders over £10 3 - 5 Working days
£2.99 all orders under £10 3 - 5 Working days
£Variable Shutl Now ASAP within as little as 90 minutes***
£Variable Shutl When Delivery within a 1 hour time slot on a date you choose✝✝
£15.00 Saturday Delivery before noon**

Republic of Ireland Options

Price Option Delivered
£8.50 Standard delivery 2-3 working days

Rest of World Options

With regret we are unable to ship to any other destinations at this time

✝ We will confirm to you by email/text message when the store has reserved the items for you. Reserved items will be held at the store until the end of the next working day after you receive notification. If the store is closed your request won't be processed until the next time they're open.

* Please ensure that your order is completed before 4pm the day prior to delivery needed (Mon-Fri)

** Saturday deliveries can only be placed before 4pm on the Friday before the scheduled Saturday delivery.

*** The Shutl express delivery service is only available if your order meets certain requirements. If it's available it will be displayed as a selectable delivery option during checkout.

✝✝ Date selection is limited to 14 days in advance including the current day. Selectable time slots are 1 hour long and vary depending on the date and delivery address.

Shop Your Way

Order Online

Browse and purchase from our entire range.

Buy Instore

From any of over 190 stores nationwide

Collect in Store

Order, confirm and collect at your nearest store

On Your Mobile

Download our App for your iPhone or use our mobile site

Order By Phone

Friendly staff waiting to help on 0844 557 6000

Home Delivery

Order in store or online and we'll deliver the item to your home or office

The prices below are per item and exclude VAT.

KS85G Bass Reflex 35.5mm (1+) £3.075 (5+) £2.677 (10+) £2.528
KS84F Bass Reflex 52.5mm (1+) £3.158 (5+) £2.677 (10+) £2.528
KS86T Bass Reflex 40.5mm (1+) £3.158 (5+) £2.677 (10+) £2.528
L99AB Bass Reflex 45.0mm (1+) £3.158 (5+) £2.796 (10+) £2.674 (25+) £2.563 (100+) £2.460
L00AC Bass Reflex 65.0mm (1+) £3.575 (5+) £3.174 (10+) £3.036 (25+) £2.910 (100+) £2.793
KS87U Bass Reflex 54.7mm (1+) £3.575 (5+) £3.060 (10+) £2.890
QQ65V Bass Reflex 70.0mm (1+) £3.575 (5+) £3.060 (10+) £2.890

If you require a price for a larger quantity than shown above:

Contact B2B Team »

Why not tell us and our B2B sales team about your specific business needs and expectations?

Offering a 1-2-1 personal account management service each representative is able to help you ensure the service from Maplin meets your approval on all levels every time.

As well as being able to help you benefit from volume quotations and bespoke product sourcing our team also offers a wide range of business services including:

  • 30 Day EOM credit terms available on application
  • FREE delivery on all orders above £35
  • A range of guaranteed delivery services to ensure your goods are with you to meet those tight deadlines
  • Proforma Invoices
  • Scheduled and forward ordering system
  • Product branding and bespoke product sourcing available on application
  • Online and in-store account use
  • 5% discount for all schools and colleges
  • 7% discount for all universities
  • Sample product service – available on application
  • Supplier cross-referencing and BOM quotations

As you can see, our range of services is comprehensive and built to service every type of business need. We are committed to providing your business with 1st class sales and customer service.

Our aim is to establish mutually beneficial long-term relationships where our customers receive a high class of reliable service.

Please contact us on 0844 557 6000 to discuss your business needs with your individual account manager.

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Website Information

28 day money back guarantee. Return via post or to a Maplin store.

Maplin Electronics is a company registered in England No 1264385 1

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