Verity Audio Amadis Owner's Manual download pdf (Page 7)

AMADIS OWNER’S MANUAL

R.1.0 September 2009

VERITY AUDIO PAGE 7

You should always start to position your speakers without

any treatment. If speaker positioning cannot solve standing

waves or reverberation problems read the following.

The principal design factor for internal acoustics of a room,

in addition to shape and size, is the control of sound

absorption and reflection. The total absorption required to

give optimum reverberation is inherent to your room

characteristics, i.e., which surfaces are absorptive or

reflective, the area of these surfaces and the selection of

acoustical materials.

A flutter echo is a rapid (usually regular) succession of

reflected pulses resulting from a single pulse. Clapping

your hands while walking in the room can easily identify

them. They are frequently located at the ceiling corners or

at the center of the ceiling-wall intersections. If flutter

echoes are prominent, please consult your dealer to get

proper assistance on that matter.

The reverberation in the room is the resulting tendency

for sound level in the room to persist after direct sound

ceases. The optimum reverberation time for a room

depends upon room volume, sound frequency, and the

type of sound or reproduced music. The AMADIS performs

at its best in lively listening rooms. Overly damped room

will be detrimental to the AMADIS’s performance.

Optimum reverberation time (at 500 to 1,000 Hz) should be

between 0.4 and 0.6 second.

Standing waves are reflections from opposing parallel

surfaces resulting in serious peaks in the reverberation-

time / frequency curve. In properly proportioned rooms,

resonances can be effectively reduced and standing waves

practically eliminated by introducing numerous sound

treatment devices. The object is to prevent sound reflection

from going back to the point of origin until after several

reflections and/or after being considerably attenuated.

Once again if you feel having a standing wave problem in

your room, please consult your dealer to get proper

assistance on this matter.

Early reflections are the first sound reflections heard at

the listening position. They are usually intense and

annoying. In order of importance, they usually come from

the floor, the sidewalls and the ceiling. Placing diffusors or

absorbers at their image location can either control them.

Your dealer can be of good assistance in properly helping

you with this matter.

In an already well-damped room, we recommend

utilization of diffusion instead of damping.

If you choose to work with a specialized room treatment

device, the included manufacturer’s instructions should be

followed.

Ancillary Equipment

Your new AMADIS is an extremely precise instrument that

can clearly reveal the qualities of your upstream

equipment. Your AMADIS performance will be closely

related to the excellence of its associated equipment.

Subsequently, it would be wise to invest in high-quality

ancillary equipment as your enjoyment will be

consequently rewarded.

The AMADIS shows an easy impedance load for most

power amplifiers. It has been evaluated with a wide variety

of power amplifiers and has shown consistent results with

quality solid state and vacuum tube equipment. Superb

performance can be realized from either design.

The uniquely designed and manufactured binding-posts on

the Verity Audio AMADIS

accept banana plugs, spade

connectors or bare wires. For best results, we recommend

the use of spade connectors.

When choosing speaker cables, experimentation is the best

way to find which ones will be the most satisfying in your

installation. Your Verity Audio Dealer can be of assistance

in making recommendations.

Power Handling

The power tolerance of a loudspeaker is correlated to its

maximum voice-coil heat dissipation and to its maximum

cone displacement. These parameters are in turn

stimulated by the time, amplitude and spectral

characteristics of the applied musical energy. At low

frequencies, the maximum cone displacement is normally

reached before maximum voice-coil temperature.

With the AMADIS’s transducers, because of their superior

ventilation system, the voice-coils will most likely never

reach critical temperatures. But, low frequencies played at

high levels can ask for larger cone displacement than

allowed by the driver suspension. A driver reaching its

maximum displacement will not break unless this situation

is maintained for an inordinate period of time. Before a

driver reaches its maximum displacement, its distortion

level will increase greatly and will become audible. So when

a speaker starts sounding bright and hard or if any

“cracking noise” can be heard, just lower the level until it

sounds comfortable again.

The AMADIS has to be played unexpectedly loud before

any occurrence of compression or distortion appears.

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Verity Audio Amadis Owner's Manual Page 7

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