OOQ 20 Amplifier

Twenty watts was enough. The first milliwatts mattered more.

The OOQ 20 began with a simple requirement: an amplifier quiet enough for a TAD compression driver. In a system this efficient, even the smallest amount of noise becomes audible.

20 watts into 8 ohms. Transformer-balanced inputs. A MOSFET output stage. Enough power for conventional loudspeakers, but designed around the first milliwatts.

The OOQ 20 was made for high-efficiency systems, where an amplifier spends most of its life far below one watt.

Here, noise, gain and the quality of the first milliwatts matter more than headline power.

At the core is the Soul Circuit.
One amplifier architecture, scaled to the job.
Here: twenty watts into 8 ohms. Built to stay quiet when almost no power is needed.

The front-panel meters put the idea into perspective. With the scale calibrated for 8 ohms, 0 dB corresponds to 20 watts. Drop by 20 dB and the output is only 200 milliwatts; another 20 dB and just 2 milliwatts remain.

For a high-efficiency system, much of the listening happens down here. So did the design work.

The front shows what the amplifier is doing. The rear is where it is set for the system.

Balanced inputs. Individual level control for each channel. WBT binding posts for the loudspeakers. Nothing more than needed.

No potentiometers. Each channel uses a discrete stepped ladder attenuator.

The signal enters through a Lundahl transformer, passes through the stepped ladder attenuator, and only then reaches the amplifier itself. A deliberately simple sequence, with every part there for a reason.

The OOQ 20 ended up as a very simple proposition: transformer in, stepped ladder, MOSFET out. Twenty watts. That was enough.

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