US 12,107,560 B2
Valve amplifiers
Paul James Stevens, Northampton (GB)
Assigned to Blackstar Amplification Ltd., Northampton (GB)
Filed by Blackstar Amplification Ltd., Northampton (GB)
Filed on May 26, 2022, as Appl. No. 17/825,544.
Claims priority of application No. 2107724 (GB), filed on May 28, 2021.
Prior Publication US 2022/0385253 A1, Dec. 1, 2022
Int. Cl. H03G 3/00 (2006.01); G10H 1/06 (2006.01); H03F 3/185 (2006.01); H03F 3/28 (2006.01); H03F 5/00 (2006.01)
CPC H03G 3/004 (2013.01) [G10H 1/06 (2013.01); H03F 3/1855 (2013.01); H03F 3/28 (2013.01); H03F 5/00 (2013.01); G10H 2210/311 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A valve amplifier comprising:
a valve power amplifier switchable between a high-power mode and a low-power mode; and
a loudspeaker simulator circuit;
wherein the valve amplifier is configured such that the valve power amplifier drives the loudspeaker simulator circuit in the low-power mode;
and wherein a set of switches is configured to implement switching between the valve power amplifier driving the loudspeaker simulator circuit in a first output mode and the valve power amplifier driving a loudspeaker in a second output mode.