Lithosphere 110
Audiophile spherical loudspeaker
Specification
Information only data
Frequency
response with +6dB bass boost applied by using a tone control with
100Hz / 1 kHz breakpoints, 1/3 octave smoothing.
TECHNICAL DATA
Nominal impedance
8 Ohms
Low frequency tuning
Closed box
Frequency response (-10 dB) 1
60Hz-24kHz
Frequency response +/-2.5dB 1
110Hz-20kHz
Rated noise power 2
50W
Sensitivity 2
84 dB SPL/2.83V RMS/m
Magnetic shielding
NO
Color
Cream white
Enclosure construction
Two spheres joined together, the bigger one is connected to a tube, with spikeable limestone foot (for 4 pcs M5 thread spikes)
Material
Concrete (spheres), plastics (tube), limestone (foot)
Weight
25 kg / pc
Overall size (Height x Width x Depth)
108 x 25 x 25 cm
Terminals
1 pair of gold-plated banana binding post
Crossover
18dB/octave @1,6kHz
Midwoofer features
Westra KW130-1398
- 110 mm diameter diaphragm
- impregnated, lacquered paper cone with rubber sorround
- smooth midrange
Tweeter features
- modified Vifa D27TG-45-06
- 25 mm diameter diaphargm
- impregnated textile dome
- ferrofluid cooling
- drilled pole piece with damping funnel behid the diaphragm
- low resonance frequency (800Hz)
Other characteristics
- smooth directivity pattern (spherical form)
- low enclosure wall resonances (concrete)
- acoustically integrated crossover
- excellent low frequency impulse response
- hand made, only 3 pairs of similar Lithosphere speakers exist
- it's recommended to use an active subwoofer for the reproduction of the the lowest sounds (those below 100 Hz), the subwoofer should be set to approximately 100 Hz cutoff frequency, inverted phase and at equal distance from the Lithosphere 110 midwoofer
Recommended amplifier power
50-100W on 8 Ohm
ROOM ACOUSTICS
Recommended room size
15-25 m2
Recommended speaker and listener position
Speaker at least 1.5 m away from walls, and listener at a distance of 0.5...1.0 m.
Characteristics: Clear, detailed sound, but 6...7 dB bass boost is required.
Alternative position
Speaker very close to back wall. In this setting a bit of treble boost may be required, especially if there is much sound absorbing material in the room.
Characteristics: The midrange clarity is gone, but bass boost is not required.
Comments
- avoid square-shaped rooms when listening to the speaker from a far distance
- it's recommended for the listener's ear to be close to the height of the acoustical axis (here 95 cm), when listening to the speaker from a close distance
- when you place the speaker close to the wall, then the advantages of the spherical shape will be diminished