SWR 550x, Руководство пользователя

Страница: 11 / 24

550x • 11
EFFECTS BLEND CONTROL
The Effects Blend Control "blends" the signal sent from your instrument with the signal coming from your EXTERNAL effects
unit. (In other words, it has nothing to do with the SubWave™ effect onboard your 550x.) With the Effects Blend fully counter-
clockwise ("DRY"), no signal from your external effects unit will be heard. As you turn this control clockwise, more of the effect
can be heard in the overall sound. When the Effects Blend control is set fully clockwise ("WET"), no true or unaffected signal is
heard other than what your external effects unit provides. If your external effects unit has a similar control, adjust it to the fully
clockwise ("WET") position. This will avoid any possible phasing problems.
The Effects Blend circuit is similar to that used on recording consoles with the effects loop on a "side chain" to the normal cir-
cuit. Unless the control is set to the full "wet" position, you will always get the full sound of your instrument AND get the diversi-
ty an effects unit offers. This circuit is also effective in reducing noise generated by effects units because it is located after the
gain stages in the preamp.
The Effects Blend control functions only when the Effects Loop is being used. It is activated when a 1/4" phone plug is insert-
ed into the Effects Receive jack (for more information, please see the heading titled "Effects Loop" in the "Rear Panel
Features" section later in this manual).
LIMITER/COMPRESSOR CIRCUIT
The Limiter found in the 550x is a soft knee type limiter. The Limiter circuit is located after (post) the Master Volume and
before (pre) the power amplifier. Therefore, the Limiter is driven by the Master Volume control. Its threshold (starting point) is
preset by the factory so that the user can get maximum overall apparent volume without unduly overdriving (or "clipping") the
power amplifier, which can eventually damage the unit's internal circuitry. This can also be helpful in preventing speaker dam-
age when running your system at high volumes.
ACTIVATING OR DEFEATING THE LIMITER CIRCUIT
You may either activate or defeat the Limiter circuit via the Effects Blend control, which doubles as an on/off switch for the
Limiter. The "In" position activates the Limiter Circuit, and is the default setting as shipped from the factory. To defeat the
Limiter, simply pull "out" on the knob of this control until you hear and feel a "click." To re-engage the Limiter, push the control
back in to its original position.
LIMITER ACTIVE LED
When the threshold (starting point) of the Limiter circuit is reached, the Limiter Active LED will light, indicating that the Limiter
Circuit is active and helping to protect your power amplifier from clipping. The Limiter LED will not illuminate when: a) the
Limiter has been defeated by pulling out on the Effects Blend control; b) when playing at levels not high enough to engage the
circuit.
NOTE
: If you have defeated the Limiter and you hear a loud, sharp distortion present in your
sound–and the Preamp Clip LED is not lighting up–re-engage the Limiter by pushing the Effects
Blend control back in. If the distortion goes away, you were probably clipping the power amp, which is
not a good thing. Remember, the Limiter circuit is there to protect your amplifier from such a state of
operation.