Major-brand $5500 Preamp

Just two tubes (mounted directly to circuit board), solid-state rectification, volume control chips, and C-core transformer. Total weight 13 pounds. $423 per pound.

 
 
 

Major-brand $5000 Preamp

Just one tube (mounted directly to circuit board), solid-state rectification, single IE-core transformer. Total weight 13 pounds. $385 per pound.

 
 
 

PrimaLuna DiaLogue Premium Preamp - $3199

Eight tubes in ceramic sockets mounted to steel chassis, tube rectification, Takman audiophile-grade resistors, Takamisawa relays, and Alps Blue Velvet volume control all from Japan, Mundorf EVO SilverGold capacitors from Germany, point to point wiring with Swiss-made silver-plated OFC cable, dual toroidal transformers utilizing an exclusive AC noise filter, all employed in a dual-mono preamp design. Total weight 53 pounds. $60 per pound.

 
 
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PrimaLuna ProLogue Premium Preamp - $2199

Six tubes in ceramic sockets mounted to steel chassis, tube rectification, Takamisawa relays and Alps Blue Velvet volume control from Japan, point to point wiring, dual toroidal transformers, all employed in a dual-mono preamp design. Total weight 37.5 pounds. $59 per pound.

 
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