Summit Audio TD-100 Instrument Preamp and Tube Direct Box
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$699.99at AVLgear.comChecked Nov 1
Compared across 2 stores. Prices are checked against each store and labelled with when.
Compared across 2 stores. Prices are checked against each store and labelled with when.
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The Summit Audio TD-100 is a single-tube instrument preamp and direct box built around one 12AX7A tube. Its standout feature is a variable input impedance control, which lets you match or deliberately mismatch the load to a pickup and change the tone at the source. It offers 24dB of gain on a stepped pot, so settings are easy to recall, and it has an internal AC supply rather than a wall adapter. It suits studio players and touring guitarists and bassists who want tube warmth and tone shaping before the signal reaches an amp or interface. Against simpler passive DI boxes it adds gain, tube character and impedance control, but it is a single-channel unit with no digital output or onboard effects.
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Lowest price we've seen: $699.99 on Nov 1 at AVLgear.com. Tracked across 3 stores since Nov 1.
The Summit Audio TD-100 is an instrument preamp and tube direct box. It uses a single 12AX7A vacuum tube and has an internal 20-watt AC supply. It is hand-crafted in the USA and built for studio and stage use.
A variable input impedance control lets you match the preamp to an instrument or pickup, or mismatch it on purpose to change the tone. The input impedance range is 10K to 2M ohms. The gain control is a stepped pot with up to 24 dB of gain, so you can boost low-output instruments and recall settings easily.
The instrument input is a 1/4" jack, with a 1/4" direct instrument output. Balanced outputs are a +4 dB male XLR and a 1/4" -10 dB jack. There is also a 1/4" mono stereo link jack and a 1/4" stereo headphone output.
