Ellais hand built to the finest standards, using the excellent 6SN7 dual triode, one of the best octal preamp tubes available.
We chose this tube due to it being the perfect preamp tube, giving the listener unparalleled tone quality and listening pleasure.
There are literarily 1000's of NOS 6SN7's available, allowing the user to try out many different brands with varying carachteristics of this classic preamp tube, also known as tube rolling, which can have a positive effect to the overall sound of this preamp.
Ella is shipped with a quad set of factory new matched Tung Sol 6SN7's, or, we can use client supplied 6SN7's. Please note, it will take time for these factory new Tung Sol 6SN7's to settle in and mellow, generally about 50-100hrs!
Ella is a classic line preamp employing the simple yet elegant Aikido circuit. Care was taken in this design to keep the circuit as straightforward as possible to avoid manipulating the signal more than is strictly necessary. The result is this outstanding classic line preamp.
A lot of time and care was taken in the design of the power supply, as any shortcomings here will show themselves in the resulting tone of this preamplifier. To that end, we chose a solid state power supply, a regulated B+ high voltage, and a regulated DC filament supply - one for each channel. This results in an ultra quiet power supply that is extremely stable with NO variations no matter what variations there may be from your household 120VAC power outlet.
Two low noise toroidal transformers, one for B+ and one for filament, housed in a fully shielded aluminum enslosure contribute to the ultra low noise environment.
A 120V/240VAC 60/50Hz selector switch on the rear panel allows Ella to be used anywhere in the world.
Only high quality components are used in the construction of Ella. Low noise, +/-1% variation Vishay metal film resistors are used throughout the signal circuit, as are high quality Panasonic metal oxide resistors in the power supply circuit. WIMA film and Nichicon electrolytic capacitors are used throughtout. Coupling capacitors are Mundorf MCap EVO series. The gain controls are precision 24 step stepped attenuators using Vishay Dale film resistors.
The printed circuit board is designed in house and manufactured to FR4-TG standards, and is double layer with full ground planes on both sides to ensure complete screening of the circuits.
RCA sockets are gold plated and mounted directly onto their dedicated printed circuit board, which also carries the selector switch thus keeping wiring within the preamp to an absolute minimum. The selector switch is connected via a stainless steel shaft and supported by a miniature ball bearing, running through the front panel to the selector knob.
Tubes are a factory new, quad set of matched Tung Sol 6SN7's.
Preamplifier gain - 13dB
Frequency response is 15Hz to 35KHz
1.5V @ max volume
Chassis size: 14.5"W x 12"D x 8"H