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5. AUX INPUT.confined to the lowest audible frequencies, which are
Any Oline-level� audio signal can be connectednot present in some recordings. Only at large rota-
here, such as the playback signal from a second CDtions away from center is there a substantial boost or
player, or with an external step-up amplifier, acut at the mid-bass frequencies that are common in
turntable.music.
6. VIDEO SOUND INPUT. 3. TONE DEFEAT.
Connect a video-related audio signal here, suchWhen this button is pressed the Bass and Treble
as the audio output from a video cassette recorder,circuits are completely bypassed, restoring precisely
laserdisc player, TV monitor/receiver, or stereo televi-flat frequency response. When this button is OUT the
sion decoder. Alternatively, any Oline-level� audio sig-tone controls operate normally. By adjusting the tone
nal may be connected here, such as the playbackcontrols and then switching them in and out of the
from a spare tape deck. signal path, you can evaluate their effect on the
sound.
7. TAPEPLAY/REC. 4. TREBLE.
These jacks allow you to connect tape recorder ofThe Treble control adjusts the relative level of the
high frequencies in the sound. The response of the
any type, especially a high-performance cassette oramplifier is flattest when the control is set in the
open-reel recorder whose independent recording anddetent at the 12 oOclock position. Rotation of the
playback heads allow you to monitor the signal on theTreble control to the right (clockwise) increases the
tape immediately after it is recorded. Connect a
stereo cable from the TAPE REC jacks of this amplifi-level of high-frequency sounds, and rotation counter-
er to the recorderOs LINE IN jacks, and a secondclockwise decreases their level. Adjust the Treble
cable from the recorderOs LINE OUT jacks to thesecontrol to achieve the tonal balance that sounds most
TAPE PLAY jacks. natural to you.
The TAPE jacks may be used for a signal-process-Boosting the Treble increases the brilliance and
ing accessory instead of a tape recorder. Examplesclarity of details in the sound, but also makes any
noise more prominent. Turning down the Treble
of such accessories include a dynamic range proces-makes the sound mellower while suppressing hiss
sor, a noise filter, or a graphic equalizer. Connect aand record surface noise; but too much Treble roll-off
patch cord from the TAPE REC jacks to the proces-will make the sound dull.
sorOs inputs, and another patch cord from processorOs
outputs to the TAPE PLAY jacks.The Treble control has no effect if the TONE
DEFEAT button is engaged.
NOTE: At high volume settings (with the volume
control over the 12 oOclock position) both the Bass
and Treble controls do not have any effect anymore.
FRONT PANEL CONTROLS
1. POWER.
5. POWER INDICATOR.
Press this button to switch on the amplifier. ToThe POWER indicator glows green when the ampli-
switch the power off, press the button again andfier is switched on and ready for use.
release it.
NOTE: When the amplifier is switched off with a
source (such as a CD) still playing there will still be6. PROTECTION INDICATOR.
sound for as much as several seconds, depending onThe amplifier incorporates protection circuitry
the volume level, before it eventually dies out.against conditions such as overheating, short circuits,
Although completely harmless, it can be avoidedand DC off-set. Under normal conditions, this indica-
switching off the source first or by turning down thetor will not light up and the unit will operate normally.
volume first. If however one of the decribed conditions occur, the
CAUTION: In the off position the unit is still con-indicator will light up red and the unit will stop work-
nected to the mains. Disconnect the power cableing.
when the unit is not to be used for a long time.TURN DOWN the volume all the way and SWITCH
OFF the amplifier IMMEDIATLY.
2. BASS. Investigate the cause for the protection circuitry to
The Bass control adjusts the relative level of thetrip, such as a short circuit in any of the speaker
low frequencies in the sound. The response of theleads or any wire touching an adjecant terminal at
amplifier is flattest when the control is set in theeither the amplifierOs or loudspeakerOs end.
detent at the 12 oOclock position. Rotation of the knobIf overheating was the cause (the amplifierOs casing
to the right (clockwise) increases the level of low-fre-will be very warm) ensure the ventilation slots at the
quency sounds, and rotation counter-clockwisebottom and top are not blocked. Overheating can also
decreases their level. occur by playing very loud for a prolonged time. Wait
The Bass control has no effect if the TONEfor a couple of minutes for the amplifier to cool down
DEFEAT button is engaged. before switching it on again.
At moderate rotations away from center the effectIf the protection circuitry remains engaged, even
of the Bass control is subtle, because its action isafter the amplifier has cooled down sufficiently and all
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ACEC
