srizbf said:testing car audio means , it can be just go/nogo test.
frequency response test, power output test etc.
by 'test' which test you mean ?
can you give some more details?
the forum member , especially 'audioguru ' may give valuable advice.
srizbf said:then this what i understood. i may be wrong.
make a cable set-up to connect to the 'DUT'
one for power supply and one set for speakers .
so that you can quickly connect and disconnect the DUT for testing .
if the test involves many units , then a power meter can be substituted instead of speakers.
how many numbers of units to be tested per session ?
or is it enough that if you play a song through respective media that it souns is enough ? or you want to test the fidelity ?
may be , as said , i was not able to get the full requirements of your setup.
srizbf said:that means you want to connect all 4 units' output to one set of 4 speakers at the 'same time'
and play all units with one set of 4 speakers?
srizbf said:so here again:
have one set of 4 speakers.
one possibility:connect one unit output to speaker and test.
connect second unit output to the same speakers and test . and ...
is it ok ?
or connect all units output(corresponding ones ) parallely to speakers and want to test all 4 units at the 'same time'?
srizbf said:paralleling of all units output at the same time to one speaker set is not feasible .
power involved is high . and therefore 'test one unit at a time' is the recommended one .
to ease the test , make speaker connection through a switch in the outupt of units to speakers .
sounds right ?
srizbf said:probably you put the switch thinking logically that "because as a mixer mix more than one signal to one output , speakers output can also be "mixed" ' ?
srizbf said:not possible to mix in 'speaker' output.
a conventional 'mixer ' operates at low signal level and impedance matching is also taken care of .
but 'speaker ' mixing impedance matching ' is not feasible .
moreover , due to high power level ' power flow from one unit to other unit may also be a problem.
so drop mixing at speaker level idea .
have a simple switch as said earlier.
srizbf said:since it takes some time to draw the switch diagram , i will post it afterwards .
srizbf said:in your car audio amplifier , can you give the details of , how many speaker connection terminals are available ?
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