The Lambda Series TD drivers are setting a new higher standard for performance and durability. Designed for punishing professional use, they also have the clean sound needed for critical monitoring and audiophile uses. The TD15H is a high sensitivity, high power handling, high excursion, wide bandwidth driver of which there is no comparison. These drivers are capable of reproducing frequencies of up to 2Khz off axis, and much higher with a more narrow dispersion pattern.

They are rated for 500W continuous power handling. Power compression is perhaps the lowest of ANY woofer currently available due to the combination of shorting rings and the phase plug. As a result, inductance and distortion is also extremely low.

Explore the Lambda 001 Motor design

TD15H - 8ohm
Fs: 21.0Hz
Qms:4.23
Vas: 467L
Cms: .45mm/N
Mms: 129g
Rms: 4kg/s
Xmax: 14mm
Sd: 855
Qes: .27
Re: 6.5ohm
Le: .3mH
Z: 8ohm
Bl: 20.1Tm
Pe(cont): 500W
Qts: .26
1W SPL: 94.0dB

The Apollo option adds two additional massive aluminum shorting rings. This further linearizes inductance and greatly adds to the heatsinking ability of the driver for high power usage.