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SubwooferActive Transmission Line Series

A common misconception is that subwoofers are loud, boomy thump machines that simply make a lot of noise in dramatic movie action scenes, or shake your insides with the very loud beat emanating from the car next to you at the lights, or to add some boxy upper bass to a tiny tinny sounding mass market satellite system --nothing should be further from the truth.

A true subwoofer faithfully extends the music/sound on your CD, DVD, Blue Ray etc. to the frequency region below the reach of your normal speakers (or the crossover point set on your home theatre amplifier). It should simply continue the bass down, and down, without being too loud, too slow, too uneven in response, coloured or boomy. A good subwoofer is musical, accurate, has a fast response and is uncoloured; it enhances the realism of your music/movie, and your listening pleasure, and does not stand out like the throbbing of a sore thumb!

Here is a range of models that have been carefully designed with musicality and affordability in mind. The 1230RTL, 1030RTL and 1025STL are for small to medium room systems; the 1232RTL, 1225STL, 21030PTL, 1550DTL and IB1550DTL are for medium to large room systems; or you could use two smaller subwoofers. All models have a Transmission Line bass-loading channel like most of our floorstanding speakers and are musical, accurate and controlled, and perform beautifully and delicately at low volume levels as well.

Remember, the power of a subwoofer should be two to three times the power of one channel of your main HT amplifier. For instance, the 1025 subwoofer would suit amplifiers around 100 wrms per channel; or a more powerful amplifier used only to levels up to and around 100 watts per channel. The 1030, 1230, 1225, and 21030 suit amplifiers up to 125 watts per channel, and the 21050, 1550, and IB1550 suit amplifiers up to 200 wrms per channel.  Other factors like the size of the room and the size of the other speakers in the system can also have a bearing on the best choice of subwoofer. A larger room needs a larger subwoofer, and a small but powerful satellite system also requires a larger subwoofer to take over a greater proportion of the bass load.

Any subwoofer can be ordered as a passive subwoofer design without a built in plate amplifier for customers who have their own outboard  subwoofer amplification and control.

All speakers include grilles. All grilles are removable but any speaker can be made without grilles if you request.

Overview of Subwoofers
Veneers and stains
Natural semi-gloss American oak veneer, that can also be stained.
American Oak veneer
American Oak
Light Oak stain
Light Oak
Oak stain
European Oak
Baltic stain
Baltic
Walnut stain
Walnut
Dark Walnut stain
Dark Walnut
Rose Mahogany stain
Rose Mahogany
Jarrah stain
Jarrah
Black stain
Black
Non veneered colours
Soft white colour
Soft White
Black colour
Black
Premium veneers (extra cost)
Blackwood veneer
Blackwood
Queensland Walnut veneer
Queensland Walnut
Redheart Sassafras veneer
Red-heart Sassafras
Quilted Bubinga veneer
Quilted Bubinga
Blackheart Sassafras veneer
Black-heart Sassafras
See veneers, colours and finishes page.

Subwoofer 1230PTL
12" 300 wrms small/medium size

Description and Specifications

Price: $795 (or $550 kit less cabinet)
Cabinet: 500h x 400w x320d short transmission line 40 litres
Amplifier: 300 wrms
Controls: on/auto/off; level; crossover; variable phase
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 25 Hertz -- crossover +/-3dB
Inputs: low level RCA and high level (speaker leads)
Driver: 310 mm large magnet, long throw free moving driver
Description: This design gives fast response with good control; usable output below 25Hz; very satisfying and suitable for small to medium rooms.; effortless, clean, true bass good for music and movies.

Upgrades: Artisan cabinet $300

Photographs

Subwoofer 1030TTL & 1025STL
10" 300 wrms smaller size

Description and Specifications

Price: 1030TTL $750 (or $550 kit less cabinet), 1025STL $895 (or $650 kit less cabinet)
Cabinet: 500h x 300w x 420d unique short transmission line design 40 litres
Amplifier: 300 wrms
Controls: on/auto/off; level; crossover; variable 0--180 phase
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 25 Hertz -- crossover +/-3dB
Inputs: low level RCA and high level (speaker leads)
Driver: 260 mm extra long throw subwoofer with rubber suspension and enhanced gauss.
Description: Narrower powerful 10" version of the 1230RTL above; Super-extended deep and clean bass; huge power, especially in the low end where you want it; effortless, performs like the bigger 1230RTL. Can also have a high end SB Acoustics 10" driver upgrade which makes this an exceptionally detailed critical music listening subwoofer for audiophile systems for an extra $150. This is called the 1025STL and will suit small to medium rooms. Both versions are a good choice for a double subwoofer speaker system.

Upgrades: Artisan cabinet $300

1030
1025

Subwoofer 1232PTL
12" 300 wrms medium size

Description and Specifications

Price: $895 (or $650 kit less cabinet)
Cabinet: 520h x 400w x 470d unique transmission line design
Amplifier: 300 wrms
Controls: on/auto/off; level; crossover; variable phase 0--180
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 22 Hertz -- crossover +/-3dB
Inputs: low level RCA and high level (speaker leads)
Driver: 310 mm large magnet extra long throw subwoofer with enhanced gauss.
Description: This unique, hybrid transmission line gives ultra low authoritative and very tight bass with usable output below 20 Hertz. Larger cabinet than the 1230 above which allows extra bass extension.

Upgrades: Artisan cabinet $300

Subwoofer 1225STL
12" 250 wrms medium size

Description and Specifications

Price: $995 (or $750 kit less cabinet)
Cabinet: 520h x 400w x 470d unique transmission line design
Amplifier: 250 wrms
Controls: on/auto/off; level; crossover; variable phase 0--180
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 20 Hertz -- crossover +/-3dB
Inputs: low level RCA and high level (speaker leads)
Driver: 340 mm huge magnet extra long stroke high end SB Acoustics subwoofer driver.
Description: This is a similar size and has all the advanced and unique design features of the 1232 above, but uses a super detailed and fast 12" driver with an increase in efficiency,musicality and bass extension. This is one of the best subwoofers made in Australia at this price, and has lovely free flowing, controlled, musical, accurate and very satisfying deep bass in our unique, channelled bass loading design. This STL version has a high end 6 ohm 12" modified SB Acoustics driver, which reduces power slightly compared to the RTL version but is a little faster, more efficient, and suits critical music listening for audiophiles, just like the 1025STL but larger.

Upgrades: Artisan cabinet $300

Subwoofer 21030PTL
double 10" 300 wrms large size

Description and Specifications

Price: $1295 (or $850 kit less cabinet)
Cabinet: 800h x 400w x 420d, or 620h x 400w x 620d unique transmission line design using 2 x 10 inch drivers
Amplifier: 300 wrms high current amplifier panel
Controls: auto on/off; level; crossover; variable phase
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 20 Hertz -- crossover +/-3dB
Inputs: low level RCA and high level (speaker leads)
Driver: 2 x 265 mm modified Peerless long throw drivers with powerful bucking magnets and cone dampeners
Description:The 10 inch drivers have a delightfully free, natural and very extended musical response in this larger transmission line cabinet. This model has a more gradual roll-off slope which allows for ultra low bass without having to force the drivers to work overly hard -- giving longer life and reliability. Higher power 10" drivers and 500 watt amp can be used for an extra $450, making this version the 21050DTL.

Upgrades: Artisan cabinet $400

Subwoofer 1550DTL
single 15" 500 wrms large size

Description and Specifications

Price: $1595 (or $1150 kit less cabinet)
Cabinet: choice of 800h x 440w x 520d or 620h x 440w x 620d unique transmission line design
Amplifier: 500 wrms
Controls: Crossover defeat and adjustment; EQ, level and frequency adjustment; Phase 0-180
Crossover Control: adjustable 30 -- 120 Hertz
Frequency Response: 19 Hertz -- crossover +/-3dB
Inputs: low level RCA
Driver: 395 mm double magnet extra long throw, high power, high end subwoofer driver
Description: The large 15 inch driver used in this subwoofer pushes a lot of air has a very solid, natural and extended response in larger rooms with this larger Transmission Line cabinet; This is an amazing performer, especially at this price. The response is very flat and musical right down to below 20 Hz.

Upgrades: Artisan cabinet $400

800h version
620h version