Glass-A

The Glass-A by Effectrode, model GL-1A, is a triode buffer designed to buffer the output signal from a musical instrument fitted with high impedance pickups or transducers to prevent 'loading' which dulls and degrades the instrument's tone. Here are the technical specifications and features:

Specifications:
- Input impedance: Greater than 1MΩ
- Output impedance: Less than 500Ω
- Frequency Response: 5Hz-100KHz ±0.1dB
- Maximum Output: 50V P-P, dBu
- Features: Two parallel cathode follower stages operating in class-A
- All tube: Based on N.O.S. Sylvania mil-spec subminiature triode vacuum tube
- Gain: 0dB (unity)
- True bypass: Automatically defaults to bypass when power is removed
- Power requirements: 12VDC @ 600mA - Centre positive 2.1mm barrel connector
- Dimensions: Width 2.4"; Length 4.5"
- Weight: 6oz (on Earth); 7oz (Neptune)
- Construction: Solid die-cast aluminum box
- Finish: Tough racing-green powder coat

Features:
- All Tube: 100% pure analogue vacuum tube audio path operating at amp plate voltages ensures the GL-1A buffer has phenomenal headroom and very quiet, natural sound reproduction
- Frequency Response: Essentially flat between 5Hz-100KHz ±0.1dB
- Class-A operation: Pure class-A operation ensures outstanding detail and resolution
- Input impedance: Greater than 1MΩ
- Output impedance: Less than 500Ω
- Fitted with N.O.S Sylvania tube: Each GL-1A buffer is fitted with a hand- selected 6111 sub-miniature tube
- True Bypass Switching: Automatically defaults to bypass when power is removed
- Includes 12V Wall-wart Power Supply: High quality low-noise switched mode 12VDC at 1.5A wall-wart compatible with all Effectrode pedals

The Glass-A buffer utilizes high voltage tube circuitry coupled with audiophile passive components, making it a sonic dream with a flat frequency response from 5Hz to over 100KHz and a shallow roll-off to maintain low phase distortion. Its wide linear region of a tube operating at 300V allows the buffer to handle signal levels of over 50V P-P, and its parallel cathode follower circuitry ensures whisper quiet operation and superb line-drive capability.

The GL-1A buffer is designed to handle active 5-string bass guitars, NS Stick, and even 'difficult' instruments with fast transients such as lutes, harpsichords, and hammered dulcimers to reveal more detail and improve the depth and clarity of these instruments.

tubes, and Effectrode cannot guarantee continued production of this pedal for any amount of time.