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Audio and Video Talk
Valves / Vacuum Tubes
Vta st-70 or 120
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<blockquote data-quote="marantz123" data-source="post: 795738" data-attributes="member: 16849"><p>Charles</p><p></p><p>No intention to hijack this thread, but in your referred posting you questioned if anyone has used a stereo valve amp (the ST70 in this case ) in mono mode and if safe to do so ? From what is understood regarding the mono mode on a 2-channel amp is a single rca input that is divided with some separation and then fed to both channels resulting in dual mono output or a dual (stereo) input that is summed and then divided? I used a Pioneer s4100 (sx410) as a subwoofer power amp for abt 8 years with no problem by dividing a signal via two 10k resistors (the separation) and then feeding the other end of each resistor to the aux or tape input of both input channels. That mono switch is probably bringing in a divider/summing network with separation before feeding the first input stage. Valve amp fundis pls keep me honest and amps safe here .. comments pls.</p><p></p><p>Thanks.</p></blockquote><p></p>
[QUOTE="marantz123, post: 795738, member: 16849"] Charles No intention to hijack this thread, but in your referred posting you questioned if anyone has used a stereo valve amp (the ST70 in this case ) in mono mode and if safe to do so ? From what is understood regarding the mono mode on a 2-channel amp is a single rca input that is divided with some separation and then fed to both channels resulting in dual mono output or a dual (stereo) input that is summed and then divided? I used a Pioneer s4100 (sx410) as a subwoofer power amp for abt 8 years with no problem by dividing a signal via two 10k resistors (the separation) and then feeding the other end of each resistor to the aux or tape input of both input channels. That mono switch is probably bringing in a divider/summing network with separation before feeding the first input stage. Valve amp fundis pls keep me honest and amps safe here .. comments pls. Thanks. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Vta st-70 or 120
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