Guitar Gear Forum

Alright. I have an amp running into my Torpedo Captor 8Ohm. To run it to a 16 ohm cab, what does the amp need to be set to? Seems simple enough, but I couldn't get a cut and clear answer.

I've been told set the amp to 8, it's okay running the 8ohm into a 16ohm cab it just won't attenuate as much. I have done it a few times like that with no issues.

From the Two Notes manual:

If you connect a speaker cabinet to the THRU output, the internal loadbox is disconnected: your amp is directly connected to the speaker cabinet. As a result, the impedance of the speaker cabinet plugged into the THRU output should match the impedance of the amp. In this situation, the impedance of the Captor doesn't matter anymore: for example, you can use the 16 ohms output of your amp and a 16 ohms speaker cabinet in the THRU output, even if the Captor is a 4 or 8 ohms version.

The THRU output is useful to insert the Captor between your amp and speaker cabinet, as a mean to simply pick up the sound of the amp. You can keep a speaker cabinet on stage for direct monitoring, and still get a properly picked-up sound with speaker simulation in the PA.

Use a standard speaker cable between the THRU output and the speaker cabinet.

3.3 Power attenuation

captor_att.jpg The ATT output provides a -20dB attenuation. Just plug a speaker cabinet in the ATT output (use a standard speaker cable for this connection), and crank up your amp while keeping a manageable volume.

The speaker cabinet plugged in the ATT output can have a different impedance than the amp. However, this will lead to changing the attenuation ratio, which may vary from the designed -20dB. Using a speaker cabinet with a higher impedance (for example a 16 ohms cabinet on a 8 ohms Captor) will lead to less attenuation (approximately -15dB). Using a speaker cabinet with a lower impedance (for example a 4 ohms cabinet on a 8 ohms Captor) will lead to more attenuation (approximately -25dB).

Always set the amp to match the Captor. The cab after won't matter as far the amp goes. But it does change the attenuation rate as explained above.