COOLING FAN:
The internal cooling fan is powered by the amplifier’s speaker signal voltage and therefore follows the dynamics of your playing. The
fan’s threshold for operation is determined by the Output Level of the amplifier — the louder the signal, the faster the fan spins. At low volumes the fan
may run only on your most dynamic passages, or not at all. At high volumes it may run continually to provide the cooling needed for the Internal Load.
NOTE: Make sure there is clearance on either side of the unit to allow for proper cooling and ventilation.
We sincerely hope you enjoy the POWERHOUSE
®
Reactive Load Attenuator and believe it will inspire your music and expand your options when it
comes to how and where you capture guitar sounds in the future. Hopefully it will become a valuable and treasured tool in your Tone arsenal for many
years to come!
HOUSE
®
’s Front panel SPEAKER/LOAD switch is set to SPEAKER. Failure to follow this procedure may result in damage to your amplifier not covered
under its Warranty.
ATTENUATION:
This 5-position rotary switch provides five levels of attenuation ranging from 0dB (Bypassed), to -4, -8, -12, and -16dB. The
increments of attenuation and subsequent volume reduction are fairly uniform considering human hearing is variable and does not perceive volume
in a uniform manner.
Use the Attenuator to achieve a listening level that is appropriate after driving the amplifier’s output section to the desired level for your needs.
It is advisable to use the Attenuator just as much as is necessary and not much more, as there is a price to pay for running your amplifier’s output
section at high levels/Master settings all the time in terms of power tube life, as well as a point of diminishing return and in terms of overall sound and
control of it in terms of preamp effectiveness when the power section is driven into clip.
That means you should not arbitrarily set the Master volume on your amplifier all the way up, or even close, for not only will it put undue stress on your
amplifier and output tubes, it will generate excess heat in the POWERHOUSE®’s built-in load.
Therefore, set the amplifier’s Master in a range that achieves a satisfactory amount of power section coloration, but not so high that you lose the
effectiveness of the preamp’s GAIN and tone controls.
NOTE: The 16dB Attenuation position has a painted background with a matching corresponding rectangle on the LEVEL control’s far clockwise/full up
setting. In the Attenuator’s 16dB setting, this LEVEL control is brought on-line for infinite fine-tuning of the listening level in this highest level of Attenu-
ation. This allows you to achieve volume reduction down to whisper soft playing levels regardless of the Master setting on your amplifier.
LEVEL:
This control is active in the 16dB ATTENUATION setting ONLY. The LEVEL control provides nearly infinite control of the -16dB ATTEN-
UATION setting from its loudest -16dB volume when the control is full up/clockwise, to “INFINITE” attenuation (no sound) when the pot is rolled all the
way hard counterclockwise to stop/off.
WARM/BRIGHT/NORMAL:
This 3-position mini toggle provides voicing options. The bottom position creates a warmer fuller sound, the middle
position opens things up and adds more top end and the upper position is closer to neutral with low and high end response somewhere between
WARM and BRIGHT.
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