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Ergo-Ella
60W Push-Pull power amplifier kit
One of our most successful kits has been the Ella amplifier. Still we have found a way to improve the design. The Ergo chassis is new and with the use of the state-of-the-art power supply FCUPS (all Film Capacitor Universal Power Supply) and ABS (active bias supply) this Ella is the most dynamic and quiet amplifier we've ever had.
Ergo-Ella power amplifier
The Ergo-Ella retains the solid acoustics of the original Ella, but adds state-of-the-art power supply FCUPS, ABS and premium parts.
FCUPS is an all film caps power supply in a package comparable in size to normal electrolytics. Electronic choke on board with equivalent 500h allows use as virtual battery supply.
ABS module locks the bias of each tube so anode current is in perfect balance so no DC goes across the OPT core.
FCUPS/ABS Protection Link. Any fault with a tube - runaway, whatever, Protect Link shuts done the B+
On the right of the chassis all the AC stuff : IEC connector, power switch power transformer matrix: 1 large transformer for B+ and 2 small transformers for filament supply - terminal strips allow easy switching and adding/subtracting voltages for many circuits (KT88/2A3/300B PP or SE)
On the left of the chassis all the DC stuff : FCUPS (film cap universal power supply), ABS (active bias supply), input filter caps.
Down the middle: All the signal stuff - includes adapter plates so completely configurable from 6 to 8 tube, SE or PP, octal, UX4, noval or blank out one section with included cover plate.
Hardware: premium connectors, binding posts, and passive parts are used throughout, silver wire, teflon composite sockets Kiwame, Obbligato etc etc, yup she's loaded.
Output transformers having 30% larger cores, made from imported Japanese grain oriented silicon steel. This gives at least another 10hz power bandwidth but retains the high frequencies as the windings are wound with a 'perfect lay' technique, allowing tighter windings and less capacitance that scatter sound.
4/8/16ohm speaker taps: Why? It is needed. Really. Nominal impedance ratings are often misleading. An 8 ohm rated speaker may be 6 or 12 ohms and often sounds better on 4 or 16 ohm taps. Always try different taps to determine which gives best sound. When the right tap is selected, soundstage will be bigger and sounds more energetic. Also 16 ohm taps allow using vintage high efficiency speakers. Connecting them to 8 ohms is a compromise.
Power transformer is also improved with EI H14 cores. This massive beating heart provides a very low power supply impedance virtually eliminating voltage sag on transients.
The chassis is solid, heavy and non-magnetic for best sound. Bamboo wood cheeks and fascia.
The Ella tube amp is highly reviewed Internationally and our best selling amp kit. Includes picture-based buildup instructions
Reduced resolution version of the Ergo-Ella instruction manual
Specifications: (may change without notice)
• Power output: 60Wx2 RMS @ 1KHZ Class AB
• Frequency response: 6-60kHz (-3dB@10W)
• THD: <1% (53W@1KHz), 0.1% (1w@1KHz)
• Signal to noise: 90dB
• Inputs: 1 set RCA and space for 1 set of XLR
• Input sensitivity/impedance: 100mV, 50K
• Output impedance: 4, 8, or 16 ohm
• Power: 110/120/220/230/240V AC +- 10% 90W
• Weight: 25 Kg
• Tubes: 4xEL34 (or 6550/KT88), 2x6922, 2x6SN7
(Tubes are not included in the kit)
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Ergo-Ella Max
With the allready packed Ergo-Ella there isn't a whole lot of room to go up but so as not to disappoint....
Here it is, the dream: includes premium teflon tube sockets,
6 pcs teflon tinfoil coupling caps, tantalum resistors
pure copper premium binding posts
No tubes as standard, no power cord.
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