Lotus JohnH Attenuators
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The other end

The back panel

Amp in, speakers out, the bypass switch, power for the fan, and the code that brought you here.

The back panel of the 2 ohm, 60 watt model: Amp jack, speaker outputs lettered for 2 ohms, Bypass and Run, EXT Power jack, QR code and the copper lotus
The 2 Ω back panel, drawn from its circuit board files. The 120 W panel reads the same apart from its wattage.

Left to right, on the 2 Ω model

Amp
From your amp's 2 Ω speaker output. The copper ring marks it.
2 Ω, the stacked pair
One 2 Ω cab in either jack. Two 4 Ω cabs, one in each jack: that is the 2×4 Ω between them.
Bypass / Run
Up is Bypass, down is Run, through the attenuator. Don't switch it while the amp is running.
EXT Power
Optional power for the fan: 9–18 V AC or 9–24 V DC. With nothing plugged in, the fan runs off your amp's own signal.
The QR code
Opens this site. It is drawn in copper from the panel's own teardrops, with leaf-shaped eyes.
The back panel of the 4 ohm, 60 watt model: Amp jack, speaker outputs lettered for 4 ohms, Bypass and Run, EXT Power jack, QR code and the copper lotus
The 4 Ω back panel, drawn from its circuit board files. The 120 W panel reads the same apart from its wattage.

Left to right, on the 4 Ω model

Amp
From your amp's 4 Ω speaker output. The copper ring marks it.
4 Ω, the stacked pair
One 4 Ω cab in either jack. Two 8 Ω cabs, one in each jack: that is the 2×8 Ω between them.
2 Ω
One 2 Ω cab, or two 4 Ω cabs with the center jack (2×4 Ω).
Bypass / Run
Up is Bypass, down is Run, through the attenuator. Don't switch it while the amp is running.
EXT Power
Optional power for the fan: 9–18 V AC or 9–24 V DC. With nothing plugged in, the fan runs off your amp's own signal.
The QR code
Opens this site. It is drawn in copper from the panel's own teardrops, with leaf-shaped eyes.
The back panel of the 8 ohm, 60 watt model: Amp jack, speaker outputs lettered for 8 ohms, Bypass and Run, EXT Power jack, QR code and the copper lotus
The 8 Ω back panel, drawn from its circuit board files. The 120 W panel reads the same apart from its wattage.

Left to right, on the 8 Ω model

Amp
From your amp's 8 Ω speaker output. The copper ring marks it.
8 Ω, the stacked pair
One 8 Ω cab in either jack. Two 16 Ω cabs, one in each jack: that is the 2×16 Ω between them.
4 Ω
One 4 Ω cab, or two 8 Ω cabs with the center jack (2×8 Ω).
Bypass / Run
Up is Bypass, down is Run, through the attenuator. Don't switch it while the amp is running.
EXT Power
Optional power for the fan: 9–18 V AC or 9–24 V DC. With nothing plugged in, the fan runs off your amp's own signal.
The QR code
Opens this site. It is drawn in copper from the panel's own teardrops, with leaf-shaped eyes.
The back panel of the 16 ohm, 60 watt model: Amp jack, speaker outputs lettered for 16 ohms, Bypass and Run, EXT Power jack, QR code and the copper lotus
The 16 Ω back panel, drawn from its circuit board files. The 120 W panel reads the same apart from its wattage.

Left to right, on the 16 Ω model

Amp
From your amp's 16 Ω speaker output. The copper ring marks it.
16 Ω
One 16 Ω cab.
8 Ω
One 8 Ω cab, or two 16 Ω cabs with the 16 Ω jack beside it (2×16 Ω).
Bypass / Run
Up is Bypass, down is Run, through the attenuator. Don't switch it while the amp is running.
EXT Power
Optional power for the fan: 9–18 V AC or 9–24 V DC. With nothing plugged in, the fan runs off your amp's own signal.
The QR code
Opens this site. It is drawn in copper from the panel's own teardrops, with leaf-shaped eyes.
50rem) 48rem, 100vw:The Lotus M3 from behind: the back panel with its chrome jacks, Bypass toggle and EXT Power jack under the copper lotus
Rendered from the CAD model.