Threshold Audio

Threshold is associated with US high-end power amplifiers, including Nelson Pass-era designs. The units featured here are vintage equipment maintained in active use.

Amplifiers

Equipment index

Products in the rooms

Browse all Threshold Audio equipment

Venue equipment records, including their original model uncertainties. Shared-system entries retain the full recorded context.

400A
Amplifiers & receivers
Threshold 400A Class-A power amplifier. Nelson Pass-era high-bias American Class A; runs hot, drives real current.
Bonsai HiFi
S/150
Amplifiers & receivers
Threshold S/150 stereo power amplifier. Stasis-series Class AB from the same Pass/Threshold family.
Bonsai HiFi

Hear it in the rooms.

Equipment, commissions and collaborations.

Cali / Colombia

Bonsai HiFi ↗

Equipment in use

Bonsai HiFi lists Threshold in its amplifiers setup. The equipment details below reflect the venue record.

Amplifiers in rotation: 400A and S/150

Inside the system

Bonsai’s signal chain puts the selector at the centre: the Technics decks feed the ARS Model 9900, while the GR-Research X-CS Encore speakers reproduce the main programme through the currently listed Sansui BA-2000. The sealed main cabinets and separate bass system allow the upper-bass and midrange presentation to be considered separately from the room’s deeper bass demands.

Read the system story ↗