Brines Acoustics

TB-20

Tang Band W8-1772

Bass Reflex Speaker

Last Modified 6/30/11

The TB-20 is a stand mounted bass reflex cabinet using the Tang Band W8-1772 driver. The TB-20 gives you most of the benefits of the TT-2000 in a smaller package. The TB-20 provides the clear intimate mid-range that is expected from a single-driver speaker and still have plenty of output down to 40 Hz. The TB-20, as with the TT-2000, has an uncommonly good top end for an 8" driver. This is a perfect speaker for multi-purpose home theater and stereo recordings. The TB-20, as with the TT-2000, has a slightly warm sound with none of the in-your-face shout that is so common with single driver speakers. This is an easy speaker to live with. The FB20 is available as a completed speaker, plans, flats and unfinished. Specifications are:

• Nominal 41 Liter cabinet
• Dimensions: 24.25" x 11.5" x 16.5"
• Weight 40lb.
• F₃ = 51Hz
• F₁₀ = 43Hz

Frequency Response

Black = 0⁰ Red = 15^o Blue = 30^o Green = 45^o Gold = 60^o

Nearfield Response

Black = Farfield Gray = Nearfield

Because I do not have access to an anechoic chamber, the bottom end of the frequency response graphs is contaminated with room reflections. A combined nearfield measurement of the driver and port outputs is valid from the bottom to 200-300Hz. This shows what the bass response would be in an anechoic chamber. I used the nearfield graph to determine F₃ and F₁₀.

Impedance

Waterfall

I offer limited custom production here at Hot Springs Village, AR. I will provide plans, flats, assembled unfinished cabinets and completed speakers. Of course, prices may vary at my whim or due to the cost of materials. Since I am doing one-off production, I get no discounts from suppliers. I simply pass on the actual cost of drivers and filter parts. The current price list is:

Notes:

Prices are for two cabinets or speakers, delivered to your door. All shipping and handling is included.The standard material is 1" high quality plywood. Non-standard materials or finish are negotiable. If you feel that you will need grills, see Grills.

1. Plans will be delivered as PDF documents attached to e-mail. Snail mail delivery can be arranged.
2. Flats include all panels and braces ready for glue-up. The false baffle is drilled for mounting screws. Drivers, filters and all hardware will be provided by the customer. Shipping weight is 35lb.
3. Complete speakers are ready to hook up to your amplifier. Drivers and all hardware are included. The filter will be installed unless arranged otherwise. The standard finish is quarter-cut red oak veneer, stained to your specification and finished with three coats of tung oil finish. For more information about available finishes, see Fit and Finish. Shipping weight is 40lb each for two packages.

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