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Old 5th February 2013, 03:07 PM   #11
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The C-B of the two transistors are coupled in blocked mode.
There will not flow any current from the collector up to the B-E-joint.

Again, what ais the purpose of the two PNP-transistors on the diff input stages collectors?
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Old 5th February 2013, 03:25 PM   #12
Stee is offline Stee  Italy
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normally in the input stage using transistors with low Ic on the natural bias voltage 0.6 V
this method allows to obtain a driving current of the stadium in tension much wider because the BJT PNP has deliberately characteristics of current@0.6V higher
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Old 5th February 2013, 04:29 PM   #13
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Exclamation Crossover

I would like to do the speakers for amplifier 60W RMS / 8 ohm. I watched the speakers Woofer Beyma 8BR40/N - 50W RMS, 35 - 6000 Hz, 90 dB, 8 ohm and Tweeter Beyma T2030 - 15W RMS, 1,5 - 20KHz, 95 dB, 8 ohm with crossover Beyma V2 hifi, 300 W, freq 3 KHz, 8ohm.

I turn to you, because I'm not so sure that this is a good relationship and frequency of cutting 3 KHz correct

Would it be better if I would use stronger tweeter and would cut the freq to 4 or 5 KHz
.
Does anybody can help me with advice and calculation for crossover

Best regards
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Old 5th February 2013, 05:02 PM   #14
llwhtt is offline llwhtt  United States
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Why are you asking about speaker crossovers in an amplifier forum?

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Old 5th February 2013, 08:29 PM   #15
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Quote:
Originally Posted by llwhtt View Post
Why are you asking about speaker crossovers in an amplifier forum?

Craig
Probably because I registered for the first time today and I'm still a beginner. Please help me.
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Old 5th February 2013, 08:42 PM   #16
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Quote:
Originally Posted by jancopanco View Post
Probably because I registered for the first time today and I'm still a beginner. Please help me.
Go to the forums list, Look up the group "Speakers"
There You will find "Multi-Way" as the forum where it would suit fine to post your question.

Start by clinking this link: http://www.diyaudio.com/forums/multi-way/
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Last edited by TANDBERGEREN; 5th February 2013 at 08:43 PM. Reason: Wrong link
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Old 6th February 2013, 04:33 AM   #17
DUG is offline DUG  Canada
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Now I see what it was supposed to be.

Base connection is in the wrong place in post #1 schematic.

OK, thanks for clarifying your intent.

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Old 6th February 2013, 05:30 AM   #18
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Stee what is TASH MA HALL ??

Or is it poor man's version of TAJ MAHAL
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Old 6th February 2013, 07:23 AM   #19
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Well, we know Stee has a good sense of humour, when you also look at the previous thread titles...
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