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#1
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Hybrid Connection
1.Is it possible to connect a Valve and solid state Amplifier into a none
bi-wire type speakers ? I was told that the Amp would blow up. true? 2. In a bi wire type speakers, why is it not recommended that the Highs be connected to valve and the mid/sub be connected to SS Amp? Curiously yours. |
#2
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Chelvam wrote:
1.Is it possible to connect a Valve and solid state Amplifier into a none bi-wire type speakers ? I was told that the Amp would blow up. true? You would probably blow the O/P-transformer of the tube amp, if the transistor amp has more power. You can not connect any amps in parallel. There is the possibility of using two amps in a bridged configuration on a single speaker, but only if they have the same output rating 2. In a bi wire type speakers, why is it not recommended that the Highs be connected to valve and the mid/sub be connected to SS Amp? Probably because the dealer wants to sell you another expensive tube amp. I do not know of any reason for this, but if you ask Hoffmann... -- ciao Ban Bordighera, Italy |
#3
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Actually Ban, you can indeed connect two transformer coupled tube amps in
parallel. That is the bridging mode used with tube amps usually. But otherwise for the original question, connecting solid state and tube amps together at the amp outputs will likely do some damage. Don't try it. Dennis "Ban" wrote in message ... Chelvam wrote: 1.Is it possible to connect a Valve and solid state Amplifier into a none bi-wire type speakers ? I was told that the Amp would blow up. true? You would probably blow the O/P-transformer of the tube amp, if the transistor amp has more power. You can not connect any amps in parallel. There is the possibility of using two amps in a bridged configuration on a single speaker, but only if they have the same output rating 2. In a bi wire type speakers, why is it not recommended that the Highs be connected to valve and the mid/sub be connected to SS Amp? Probably because the dealer wants to sell you another expensive tube amp. I do not know of any reason for this, but if you ask Hoffmann... -- ciao Ban Bordighera, Italy |
#4
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"Ban" wrote in message
... snip..snip... You would probably blow the O/P-transformer of the tube amp, if the transistor amp has more power. You can not connect any amps in parallel. There is the possibility of using two amps in a bridged configuration on a single speaker, but only if they have the same output rating Many Thanks to you, Ban. Even though, the question was not well phrased you managed to provide the answer. 2. In a bi wire type speakers, why is it not recommended that the Highs be connected to valve and the mid/sub be connected to SS Amp? Probably because the dealer wants to sell you another expensive tube amp. I do not know of any reason for this, but if you ask Hoffmann... Who is Hoffmann? Meanwhile my handyman friend told me it cannot be done because SS Amp is fast and valve is slow (or the other way round). Frankly, I don't know what's that and never experienced one even though in one listening session that I attended, sometime back, that was the most spoken word. And one say, Valve is more suitable for heavy bass and SS for High frequencies and or the opposite is true. Any idea? |
#5
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"Dennis Moore" wrote in message ...
Actually Ban, you can indeed connect two transformer coupled tube amps in parallel. That is the bridging mode used with tube amps usually. Even with tube amps that use negative feedback? That sounds a bit scary to me. |
#6
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In article ,
"Dennis Moore" wrote: Actually Ban, you can indeed connect two transformer coupled tube amps in parallel. I suspect that connecting the outputs of tube amps in parallel does unpleasant things to the load reflected through the transformers to the output tubes. That would be a Bad Thing.Tubes, unlike transistors, need to work into a rather narrow range of load impedance. Even an "identical" pair of tube amps might not be well-enough matched to avoid unpleasant currents flowing from one amp into the other. That is the bridging mode used with tube amps usually. "Bridging" doesn't mean "parallel"; it means that the two amp outputs are connected one to each of the two speaker leads, but the amps are driven "out of phase". That topology doubles the available output voltage and halves the apparent load impedance seen by each amp. IF the amplifiers are able to deliverthe increased current into the lower load impedance, you get four times the power capability of one amp into the given speaker. It's like giving the speaker a "center tap" and grounding it. cf. "Wheatstone Bridge". Isaac |
#7
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I suspect that connecting the outputs of tube amps in parallel does
unpleasant things to the load reflected through the transformers to the output tubes. That would be a Bad Thing.Tubes, unlike transistors, need to work into a rather narrow range of load impedance. Even an "identical" pair of tube amps might not be well-enough matched to avoid unpleasant currents flowing from one amp into the other. Not a problem at all. For years, Bogen amps had cathode follower output/input jacks which could be daisy chained together to ensure the output stages would all be on the same page at the same time. In my work, sound reinforcement, we routinely paralleled two MO-100 power amps and had no problem whatever. Measured output was, as expected, 200 watts into a proper load. Regards, Tom |
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