GoldenEar Technology
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Invisa MPX Manual
Amplifi er Distortion — #1 Threat to your New Speakers!
Amplifi er distortion is the principal cause of speaker damage. When listening at loud levels your amplifi er may run
out of clean power. It will then begin to produce speaker-damaging distorted power. This will damage any brand
of speaker very quickly! More powerful amplifi ers are actually safer — For example: A 40 Watt/channel amplifi er
will have substantial distortion above 40 Watts. If driven to 50 Watts, this amplifi er will deliver speaker-damaging
distorted power! But a 100 Watt/channel amplifi er will have very low distortion below 100 Watts. Therefore, when
the speaker requires 50 Watts, this more powerful amplifi er will deliver clean power and speaker damage is less
likely to occur. (See your GoldenEar Technology dealer for amplifi er recommendations.)
Volume Setting
Do not be fooled by the Volume setting of your receiver/preamplifi er. It only adjusts listening level — it is not
a “power-output” dial. The amount of amplifi er power actually used at a given Volume setting depends solely
on the nature of the source material you are listening to (at a given Volume setting a quiet section of music will
use less amplifi er power than a loud section). With typical material, the rated output power of many receivers/
amplifi ers is often reached when the Volume is set to around -10dB, or between the “11” and “1 o’clock”
settings with an analog control (with bass/ treble and loudness controls not used — otherwise rated power may be
reached at even lower Volume settings). Remember, all amplifi ers produce distortion when operated beyond their
rated output power. The resulting distortion will damage all speakers! If you listen at loud levels, be careful to listen
for the point of audible distortion — if the speakers begin to sound distressed, turn the Volume down or your speak-
ers and/or amplifi er(s) will be damaged! This type of damage constitutes abuse and is not covered by the warranty.
If louder volumes are desired, consider a more powerful amplifi er.
There is Actually a Limit!
Even with these safer, more powerful amplifi ers, there is a point at which you could have more power than the
speaker can handle. At that point you will overpower the speaker and damage it. At loud levels do not increase
bass/treble controls from zero and ensure that all loudness/contour/bass EQ buttons are off (otherwise rated
output power will be reached at even lower volume control settings).
The Right Amount of Power
A power-range rating is given in the specifi cations as a guide to indicate the approximate minimum and
maximum power input of your GoldenEar Invisa
®
MPX speakers. Amplifi ers that meet or even exceed the
speaker’s power-range rating are recommended as their greater power reserves provide better sound. But always
use the speakers within their power-range rating to prevent damage — that is, keep listening levels below the point
of obvious audible distortion.
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