Summit Audio TD-100 Instrument Preamplifier and Tube Direct Box

The Summit Audio TD-100 Instrument Preamplifier and Tube Direct Box features a hybrid signal path using a discrete transistor that drives the output device and a 12AX7A/ECC83 vacuum tube that drives the input secition. It's perfect for studio and live use and it offers a variable input impedance control that can dramatically change the sound of an instrument. That by decreasing the impedance on the TD-100, the instrument's pickups get loaded down which causes it to change their tone and the way they react to the string vibrations (making the tone quieter or darker). And by raising the impedance, it allows the pickups to work without distractions. It opens up the sound with a slight increase in gain and the instrument can then sit properly without EQ. The TD-100 is an instrument preamp that will bring true high-end audio quality to home studios.

Key Features

• Instrument preamplifier and tube direct box
• Variable input impedance from 10kΩ to 2MΩ provides great variation to musical instruments
• Delivers smooth and subtle tube overtones
• XLR microphone level and 1/4" TRS line level outputs
• Headphone output
• Ground lift and polarity switch
• Signal and overload LEDs
• One 12AX7A/ECC83 vacuum tube
• Internal, high voltage power supply

Technical Specs

Vacuum Tubes

Single 12AX7A

Connections

Instrument Input : 1/4" Jack

Direct Instrument Output : 1/4" -10 dB balanced

Outputs: +4 dB male XLR and 1/4" - 10 dB balanced

Stereo Link : 1/4" mono Jack

Headphone Output : 1/4" Stereo Jack (600 ohms)

Signal to Noise Ratio

140dB

Max Input Level

+23dBu

Max Output Level

TRS: +21dBu, XLR: +2dBu

Max Gain

24dBu

Frequency Response

20Hz - 100kHz - 1dB

THD + Noise

0.14%, +5dB in, unity gain

Power

Internal AC Supply

20 watts, 115, 50 or 60 Hz

Fuse Size: .5amp, slo-blo at 100/115 V

Fuse Size: .25amp, slo-blo at 230 V

Height

1.75 inches (4.44cm)

Width

8.5 inches (21.59cm)

Depth

8.5 inches (21.59cm)

Weight

5 lbs.

Specialties

Both a direct box for live use and instrument preamplifier for recording