Specifications
3
Speaker placement is critical for correct imaging, frequency balance,
low frequency performance, and efficiency.
Low frequency performance in particular can be determined by the shape of
the room and the speaker's distance from the wall immediately behind
them. Typically, the optimal distance between the LFTs and the rear wall
is 2 to 5 feet in an average room. Because the diaphragm of the LFT-6 is
very low in mass relative to the air around it, the air can act to mass-load
the diaphragm, preventing large physical excursions required for deep bass
reproduction; this effect occurs when the speaker is too close to the rear
wall.
The LFT-6 comes with one felt pad applied to the back of each panel.
These pads are used to reduce the amplitude (Q) of the bump int the low
frequency responce of each panel. Each panel has a diffrent resonance
frequency in an attempt to smoth the low frequency response of the
speaker. In general all three felt pads may not be necessary. This will
depend on the room and listening position. A general rule would be if more
bass output is desired from the speaker, remove felt pads, and if less bass
output is desired, add felt pads. If you need more than is supplied with each
speaker contact the factory.
The above is not, however, the only consideration in determining the best
distance between the LFTs and the wall behind them. At certain exact
distances from the wall behind them, dipole speakers can exhibit multiple
low-frequency cancellation effects, causing bumpy, “comb-filter”-like bass
response. At the same time, low-frequency information can be reinforced
by experimenting with the distance between the listening area and the wall
behind it. Generally, if the listener is seated close to the wall behind him,
there will be more apparent low frequency information; as the listener
moves away from the wall behind him, toward the center of the room, low
frequency reinforcement will decrease. Trial and error remains the best
way to sort things out and achieve the best bass response; there are no hard
and fast rules.
Positioning the
Speakers in the
listening room
Felt Dampers