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Carver Home Audio (Stereo) Discussions and Questions
(pair of) SILVER-7 TUBE AMPs
Joined: Sun Jan 14, 2007 12:53 pm
Location: TN Native Languishing in MD
From FrankieD's lips to your ears: Sunfire: a quiet box of endless power.
Sunfire TG-IV/400~7 Amp
Carver SD/A-360 CDP
Active bi-amp: Ashly XR-1001 & 2 Rane PEQ-15s
Main: HotRodded AL-IIIs
Sub: Klipsch RT-12d
Center: Sunfire CRS-3c
Surround: Sunfire CRS-3 (x 2)
OconeeOrange wrote:"Gary likes to play it 'loud' as do I. His system begs you turn it up until you die"
RIP WIlliam B. Dibble, 1948-2012. I'll miss you my friend.
Loading. In voltage transfer, the rule of thumb to avoid excessive loading and rolling off HF response is a 10:1 ratio. So if the output impedance is 200 ohms, then your max load you want to drive is 2000 ohms. Most devices you can find input impedance listed for, output impedance is sometimes hard to find out. If you are driving tube amps, then you're in luck as they are a very high load and that would help a lot.
Grounding. Ground should not be considered zero. If only it was! Currents flow through the ground side of circuits equal to the driven side. So all the slight impedances of connections and distances back to the common ground point mean there starts to be voltage above absolute zero. With the unfortunate design of unbalanced circuits and interconnects, all of sudden when we make connections we start effecting current flow which now has paths back through other components. Splitters do nothing to imped this and you are sharing current loops in undesirable ways.
A distribution amp helps in this problem giving an op-amp (and level control) to each output. Transformers break grounds and eliminate the ground sharing. But good ones are expensive.
You may get away with several splits as long as the loading doesn't become excessive. Don't do it if the combined load exceeds the 10:1 rule. Listen for high freq roll off and noise problems. You can try it with a batch of the one to two splitters but if it works ok, then replace them with better to avoid all those connections. Certainly make sure all are fed from the same power source! Do not have some getting their power from a different circuit.
Hope that helps some Gene!
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