Congratulations on your purchase of a Seta® Buffer! The Seta Buffer is a low noise, fully balanced
design featuring an ultra-wide frequency bandwidth of 20 MHz. This provides you with the key to
obtaining stunning, detailed three-dimensional music reproduction from your computer audio system. The
Seta Buffer is designed to be used as a back-end signal conditioning stage to facilitate setting the correct
system gain (“gain structure” in pro-audio parlance) of your digital audio playback system.
Unlike passive attenuators, the Seta will present a negligible (2 megohm) load to your audio interface or
DAC output, while also providing extremely low output impedance. This is suitable for driving any
power amplifier with a low noise, low distortion signal.
The Seta Buffer incorporates several design features which contribute to its high performance:
•Ultra low impedance AGM rechargeable batteries used as charge storage reservoir and power supply filter;
proprietary, exclusive charging and maintenance circuitry specially designed by Channel D and proven,
refined and used exclusively in our phono stage designs for over 5 years
•Carefully selected low noise switching power supply, with additional filtering for ultra low noise
•State of the art, premium quality low - ESR polymer dielectric electrolytic and tantalum filter capacitors
•Ultra precision (0.1% tolerance) metal film low noise 1206 / MELF surface mount resistors used throughout
•Ultra low distortion, low impedance differential output stage with greater than 40 MHz signal bandwidth
Getting Started
Please take the time to read this Installation and Use Guide, to familiarize yourself with the installation
and operation of the Seta Piccola Buffer.
Important: If the package you received from your shipper is below room temperature, please allow the
package to acclimate at room temperature for a few hours before opening it, to avoid moisture condensa-
tion on cold internal surfaces.
The following items are included. Please check the package and notify Channel D of any shortage:
• SetaPiccolaBufferwithInternalAGMBatteriesInstalled
• RCAfemaletoXLRmaleadapters,pin1open
• ExternalDCpowersupply,110/220VoltInput
After unpacking, connect the provided external power supply to an AC power source and plug the barrel
connector into the power jack on the rear panel of the Seta. Note: the switching type, “wall wart” supply
was carefully selected for its especially low noise. The switching power supply also provides much better
galvanic and high frequency noise isolation from utility power than a linear power supply.
Signal connections can safely be made to the Seta Buffer whether or not the power supply is connected.
However, be sure to mute or power down your power amplifier(s) while making signal connections, to
avoid generating transients which could damage loudspeakers.
Signal Inputs
•The XLR inputs are intended for connection to the balanced outputs of your audio interface or
DAC. Adapters are included for connecting single ended (unbalanced) sources.
Signal Outputs
•The balanced XLR outputs are for connection to the balanced inputs on your power amplifier.
•The RCA outputs are true single ended (unbalanced) outputs, for connecting to single ended
equipment.
