THD Electronics Hot Plate User Manual

THD HOT PLATE OWNER’S MANUAL

To avoid damaging your amp, speaker(s) or the Hot Plate, please read this manual thor-

oughly before operating the Hot Plate.

you to obtain the full output distortion of a tube amplifi er at lower volumes, without sacri-

fi cing tone.

the 4Ω (red), the 8Ω (purple), and the 16Ω (blue). To optimize the tone and function of the

4. Adjust the rotary switch on the Hot Plate to attain the volume you desire. At -0 dB the

At the -16 dB setting, the potentiometer on the right is activated (at all other settings this

When the rotary switch is at Load, there will be no sound coming through the speakers,

want to activate both or either of them (by switching them up) to com pen sate for any loss

two speaker cabinets. These output jacks are wired in parallel, so if both speaker outputs

4. Adjust the line out level as necessary.

YOUR AMP WITHOUT SPEAKERS CONNECTED.

Attenuation: 0 dB to -16 dB in four dB increments; -16 dB to -∞ dB (zero output) continu-

Weight: 4.2 lbs (1.9 kg).

WARRANTY: The Hot Plate has a two year limited warranty.

A. This is part of a noise reduction system that noticeably cuts down the amount of hiss

through an amp set at full output.

A. Only the bright and deep switches. These have a very slight effect on the line out tone,

A. The Hot Plate can get warm, so do not place objects on top of it. It has a built-in fan that

top of the unit, so do not obstruct the air below the Hot Plate by placing it on a shag rug, for

When picking it up after extended use please check that it is cool enough to carry.

A. NO! The Hot Plate and the power section of the amp will be dam aged if the amp does

the Hot Plate if it has a solid state output section. However, an amp that has a solid-state

A. Yes. Simply set the master-volume at full output, add whatever amount of pre-amp gain

you desire, and drop the decibels with the Hot Plate. You will get the same effect of distor-

tion at lower volumes, but the tone will be much warmer and fuller because your amp’s

A. NO! The most powerful amp you should use with the Hot Plate is 185 Watts RMS.

A. ONLY if the impedance of the Hot Plate is EQUAL TO OR GREATER THAN that of the

A. ONLY if the impedance of the speakers is equal to or greater than the amplifi er, AND

the impedance of the Hot Plate is equal to or greater than the amp. Again, this will lessen

the effectiveness of the Hot Plate’s tone controls.

teries in the Hot Plate?

A. The fan and light bulb are powered by the signal coming from your amp (originally gen-

full output?

A. The bulbs may need to be replaced. The Hot Plate will still function, but the noise re-

to remove the screws from the sides of the Hot Plate, then slide the chassis out. Simply

A. It is unnecessary. The 2Ω Hot Plate will be unlikely to ever see an amplifi er powerful

Watts which is capable of driving a 2Ω load.

A. This signal is generated in the cable due to the very high currents involved. To eliminate

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