Summit Audio TD-100 Tube Instrument Pre-amp/Direct Box

Product Description

The TD-100 is a single channel direct box and instrumentpreamp featuring a hybrid signal path utilizing a solid stateoutput device and a 12AX7A/ECC83 vacuum tube. Thisunique combination of of solid state and vacuum tube technologygives the TD-100 the benefits of both worlds: the highreliability and long life of solid state and the warm overtonesassociated with vacuum tubes. One of the coolest features of the TD100 is its variable input impedance control, which lets you perfectly match it (or intentionally mismatch it!) to a wide variety of instruments and pickups, giving you the flexibility to actually change the sound of your instruments.

TD-100 Tube Instrument Pre-amp/Direct Box Features:

Ground Lift Switch: This two-position switch removes the third prong of the power cable from the circuit. Lifting the ground can sometimes reduce the hum caused by a ground loop in your audio system.

Polarity Switch: This switch changes the polarity of the outgoing signal.

Direct Instrument Output: This jack mirrors the instrument input. Plug your instrument into the input and run a line from this ouput to the input on your amplifier. This output is not affected by the Loading control.

Instrument Input: Input for your bass, guitar, keyboard or other instrument. The maximum input level is +24dB.

Loading Control: This knob controls the loading or impedance for the instrument input. The impedance can be set from 10K ohms to 2M ohms. You can set this control to match the TD-100 to the impedance of your instrument or as a kind of tone control. In practical use you’ll set this control to get the sound you like best.

Signal LED: This green LED lights to indicate a proper level at the input.

Drive LED: This amber LED lights to indicate clipping on the input.

Output Gain Control: This control varies the output gain. The XLR output can be varied from -20dB to +4dB. The 1/4” TRS output can be varied from 0dB to +24dB.(0dB input level)

Headphone Output: Use the TD-100 as a practice amp by inserting your headphones here. Use the Output Gain control and the instrument’s volume control to control the volume.

1/4” TRS Line Level Output: This is a balanced/unbalanced 1/4” high level output designed to interface with your recording device, compressor or EQ without adding a preamplifier. Simply plug in a mono phone plug to use this output unbalanced.

XLR Mic Level Output: This is a balanced low level output used for injecting the TD-100 into another preamplifier. This is most often used in a live performance setting. Pin 2 is positive (+).