world's finest single-driver loudspeaker in compact and affordable form

Integrum© [complete , whole, pure in Latin] creates a new standard for price/performance in high efficiency speakers for low power amplifiers - even 1-10W low power Single-Ended Triode (SET) designs. Integrum offers 103 dB sensitivity in a compact design and sound quality of $20,000 loudspeakers at a much more affordable price.


Extraordinary levels of performance – 103 dB, compared to less than 90 dB efficiency of most speakers. That represents over 10 dB difference or more than ten times – since dB is a logarithmic measure.

Single driver design with no crossover for truly natural sound. Elimination of crossover pays big dividends with sky-high levels of detail, wide-ranging dynamics and amazing coherence. Refinement and timeless beauty of musical instruments built entirely by hand – to sound like musical instruments!

High gloss finish enhances the natural wood veneer and superb craftsmanship to create an acoustic instrument for generations.

Why Integrum?

"…they're so dramatic—and so impactful! The sound of the Nibelungs' hammers in Solti's great recording of Wagner's Das Rheingold scared the bunny and the cat. There was also something about the Integrums' stereo imaging that I really liked—a sort of spatial cleanness and clarity that made it easy to tell where the soundfield began and ended."
– Art Dudley, Stereophile

“…Integrums deliver all the single-driver magic I had hoped for without any of the limitations of the other single-driver speakers I have heard... and make beautiful music!”
– Jack Roberts,

More references >>

ETQWT© transmission line

Like Ingenium, our reference model, Integrum has the same advanced design of the ETQWT© transmission line enclosure with Helmholtz resonators and world-finest components, in order to provide superior sound quality "for the rest of us."

Read more about ETQWT transmision >>

Lowther DX4 drivers

Integrum speakers are equipped with top of the line Lowther DX4 drivers with pure silver coils providing well balanced and beautiful midrange, clear treble, and well defined bass. Other Lowther drivers are also supported including DX3, PM2A, PM6C, PM2C... to satisfy any individual sound preferences. All drivers can be installed by users to allow adjustments to room and equipment changes over time.

Integrum – technical specification

Description One-way floor standing dynamic loudspeaker
Enclosure type ETQWT™ transmission line with Helmholtz resonators
Drive unit One 8” Lowther DX4 driver with Silver coils
Bandwidth 30Hz-22kHz ± 3dB
Sensitivity 103 dB @ 1W/1kHz/1m
Impedance 8 Ohms
Crossover None
Power handling Power handling 1 - 100 Watts into 8 Ohms
Connectors WBT, 24ct gold plated terminals
Internal wiring Fully shielded Clarison cables
Dimensions H x W x D : 47x10.5x20in (122x26x51cm)
Weight 70 lb (32 kg) – Each