[sdiy] Multiples - passive vs. active?

[Tom Wiltshire]

One other difference is that you can use a passive multiple either way around, whereas you'd need different arrangements for a buffered 1 in- 4out and a 4-in 1-out mixer.

T.

On 17 Jan 2011, at 13:03, Justin Owen wrote:

> On 17 Jan 2011, at 11:31, Justin Owen wrote:
> 
>>> Is there any reason or advantage - other than cost and PCB space -  
> that someone would choose a passive multiple over an active/buffered  
> multiple? Is it always one is better than the other - or is there a  
> time and place for both - or it really matters not in the real world?
> 
>> Multiples are passive, an active "multiple" is a unity gain mixer /  
> amplifier.
> 
>> If the destination(s) is(are) high impedance, passive multiples will  
> work, however modules with a lower input impedance will load the  
> source hence the need for active mixing.
> 
> To clarify - by 'active' I meant 'buffered'.
> 
> So for peace of mind on impedance issues - it's active/buffered.
> 
> Any other takers?
> 
> Ta,
> 
> J
> 
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