Not much, if any at all. This is how I have my sub amps connected. I do recommend, however, the same type and size wire, as to your mains, if at all possible, for the best sq, based on my experience. Enjoy !, and be well.
How Does a "HI-LEVEL IN" Affect Impedance Load?
I'm looking at adding a sub (possibly a used Sunfire MK2) to a 2-Channel integrated tube amp, with no pre-amp/sub outputs. Would it be ill-advised to connect (in parallel)
the speaker outputs with the Hi-Level In, on the sub? What effect. if any, does this have on the impedance load? The currently-used (custom built) speakers run around 6-ohm, and the amplifier (Jolida) does have both 4, and 8-ohm terminals, for whatever that information is worth.
Thanks!
-Brian
Thanks!
-Brian
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- 8 posts total
Sub speaker level inputs are usually in the range of hundreds to tens of thousands of Ohms. So, doing the normal math for parallel resistance (which is close enough to impedance for us to illustrate) : R = 1 / (1/8 + 1/10000) where 8 is the speaker impedance, and 10,000 is the sub impedance, gives us 7.99 Ohms, and a difference of around 00.1%. It’s insignificant to a power amp. |
Right. No effect. This paper explains exactly what is going on. If you can find the circuit diagram for your sub you will find this same circuit inside the sub. The values of the resistors may be different to accommodate a wider range of amplifiers, and there will be a trim pot to adjust level, but its really the same basic circuit inside all of them. https://www.epanorama.net/circuits/speaker_to_line.html |
- 8 posts total