Ex-pro / DM-X

This transformer-type attenuator, the world's only, connects between the amplifier head and the speaker and reduces the volume without affecting the sound quality. It can reduce the power of a 100W amplifier down to 0.01W, so you can use large amplifiers outside of live music venues and studios!

■Transformer-type attenuator
■Rated input power: 100W
■Amplifier impedance: 4-16Ω
■Speaker impedance: 4-16Ω
■Attenuation: 100% (100W), 90% (91W), 80% (64W), 70% (49W), 55% (30W),
40% (16W), 20% (4W), 5% (0.25W), 1% (0.01W)
*Figures in parentheses indicate output power when using a 100W amplifier
■Input: 1 x Phone jack
■Speaker output terminals: 2 x Phone jacks
■Headphone/line output terminal: 1 x Phone jack
■Dimensions and weight: 194W x 127H x 218D mm, 4.1kg
~From the manufacturer's website~
The Need for an Attenuator
■ Distortion in a vacuum tube guitar amp is generated in both the preamplifier and power amplifier sections. However, turning down the volume eliminates the distortion in the power amplifier section, resulting in a thin, raspy sound. Power amplifier distortion is primarily caused by excessive input power from the vacuum tube and magnetic saturation in the transformer, and this distortion is considered the origin of a dynamic, powerful overdrive sound. Sending the distorted output from the power amplifier directly to a speaker will naturally result in a loud sound, so in some cases an attenuator is required to reduce the volume immediately before the speaker. The DM-X can power down a 100W amplifier to 0.01W. Headphone use is also possible. Attenuation immediately before the speaker also reduces amplifier noise.
*Note
■ If your amplifier cannot withstand continuous full-power operation, turning down the amplifier's master output may cause damage. In particular, if you connect a speaker with the DM-X set to 100%, oscillation may occur, causing the amplifier to suffer excessive strain and resulting in breakdown. Connect the DM-X between the amplifier and the speaker, test play at 100%, and determine a usable setting (gain, volume, master, etc.) that eliminates oscillation. Then, do not turn up the knobs any further, and use the DM-X's % controller to lower the volume to a moderate level.

■Please note that the unit will heat up if used at high output for long periods of time. Also, do not place any objects on top of the unit.

■If your amplifier has an impedance switch, keep it set to the same impedance as before connecting the DM-X, even when using it.

■Always use speaker cables to connect the speaker and amplifier.

■The attenuator is not a ""master volume."" Please note that you may not notice any effect at extremely low volumes.