Handcrafted Hemisphere Loudspeakers · Since 2002
Handcrafted Hemisphere Loudspeakers · Since 2002
About Hemispheres
Most loudspeakers project sound in one direction only — creating a "sweet spot" where they sound best, and destroying the spatial illusion the moment a listener moves away from it. Hemisphere speakers are entirely different.
They produce localized sound that emanates from the speaker's position and interacts with a room's natural acoustics. There is no front or back, and no sweet spot. This allows electronically-produced sound to take on the characteristic intimacy of unamplified acoustic sound — changing the experience of both performer and audience.
Hemisphere speakers have been used by electronic and acoustic musicians, sound artists, and laptop orchestras around the world, including the Princeton Laptop Orchestra since its inception, and in a permanent sixteen-speaker installation at Brooklyn's Issue Project Room.
See current models →Current Models
Each Hemisphere is available in two sizes — Baritone and Alto — and in both passive and powered configurations. All models feature hand-built MDF enclosures with a durable black powder coat finish and Polk Audio full-range drivers.
Baritone Hemisphere
The larger and deeper-voiced member of the Hemisphere family. The Baritone extends the low-frequency response of the hemispherical dispersion concept, making it ideal for installations, ensembles, and performance use.
| Required Power | 12V, 8A (power supply included) |
| Audio Input | Neutrik locking 6-pin XLR |
| Included Cables | 6-pin XLR → ¼″ (mono); 6-pin XLR → 6× RCA (6-ch) |
| Enclosure | Custom MDF, black powder coat |
| Drivers | Six Polk Audio full-range |
| Operation | Mono or six-channel array |
| Handles | Five, for rigging and portability |
| Audio Input | Neutrik locking ¼″ phono jack |
| Operation | Mono only |
| Power Handling | Up to 200W continuous |
| Impedance | 4 or 8 Ohms |
| Enclosure | Custom MDF, black powder coat |
| Drivers | Six Polk Audio full-range |
| Operation | Mono or six-channel array |
| Handles | Five, for rigging and portability |
Alto Hemisphere
The most portable option in the Hemisphere family — compact enough for the mobile electronic musician, without sacrificing the full hemispherical dispersion pattern.
| Required Power | 12V, 8A (power supply included) |
| Audio Input | Neutrik locking 6-pin XLR |
| Included Cables | 6-pin XLR → ¼″ (mono); 6-pin XLR → 6× RCA (6-ch) |
| Amp Output | 15W per channel |
| Shipping Weight (powered) | 21 lbs |
| Enclosure | Custom MDF, black powder coat |
| Drivers | Six Polk Audio db401 full-range |
| Frequency Response | 85 – 22,000 Hz |
| Height (center) | 7″ |
| Diameter (base) | 18.375″ |
| Handles | Five, for rigging and portability |
| Audio Input | Neutrik locking ¼″ phono jack |
| Operation | Mono only |
| Power Handling | Up to 200W continuous |
| Impedance | 4 or 8 Ohms |
| Shipping Weight (passive) | 18 lbs |
| Enclosure | Custom MDF, black powder coat |
| Drivers | Six Polk Audio db401 full-range |
| Frequency Response | 85 – 22,000 Hz |
| Height (center) | 7″ |
| Diameter (base) | 18.375″ |
| Handles | Five, for rigging and portability |
Prices & Ordering
How to Order
All orders are placed directly through Isobel Audio. Contact us at info@isobelaudio.com to discuss your needs, confirm availability, and arrange shipping.
We ship within the continental United States; international shipping is available — please inquire for rates.
Contact
We welcome inquiries about orders, custom configurations, institutional purchases, and general questions about Hemisphere speakers. Response times are typically within one to two business days.
Company
Isobel Audio LLC
Chicago, Illinois
Availability
Passive models available now.
Powered models: contact us for current lead times.
