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4 way spekaers - is the xover schematic correct? Answered

My supplies
A Tweeter with a frequency response of 20 KHz ~ 40 KHz, 8Ohms, 75Watts RMS/3000Watts Max, and Sensitivity of 105dB.
A 4” Subwoofer with frequency response of 25Hz ~ 160Hz, 4Ohms and 25 Watts RMS
Two 4” Full Range Speakers of 4Ohms and 5 Watt RMS

Is the schematic mentioned in the pic is a suitable xover for my system
please clear the nearest values to me
Thanks in Advance

11 Replies

user
iceng (author)2013-08-08

What are you planning on doing for speaker coil ballistic pull differentiation from push ?

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user
adarshnarsaria (author)iceng2013-08-09

!@#$%^&*()_
what do they mean?
I am not an audiophile neither i am a pro so speak simple think simple write simple
i am really very sorry dude
but your words bounced above my head

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user
iceng (author)adarshnarsaria2013-08-09

In a speaker with a voice coil that moves the sound cone in response to electrical signals
that represent your desired audio.

Sound engineers test a speaker with different frequencies of sine waves and measure
the response of air pressure that your ears actually hear.

You have already started to separate the frequency amplitudes to enhance the
Low frequency response to your Subwoofer with an inductor and
High frequency response to your Tweeter with an AC capacitor.

Sound engineers have discovered for a true sine_wave to your ear.
The voice coil in your Mid-range speakers needs push or pull ballistic movement difference compensations.
A designer should adjust the electrical voice coil energy being pushed or being pulled
with additional LRC elements.

This is something like phasing a pair of stereo speakers so that thy both  push at the same time etc.

Sometimes it can help to think of a speaker like a DC motor ... which it is !

A

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user
adarshnarsaria (author)iceng2013-08-10

will a 2000 watt pmpo amp be able to drive these

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user
iceng (author)adarshnarsaria2013-08-11

A 2000 watt Peak Music Power Output can drive all your speakers no_sweat.

........................ BUT ...........................

2000 only means your amp can feed 2 watts up to 2000 watts

What is seriously Difficult in your situation are the 4 inch 5 watt speakers !
The first time you turn up the volume because you like a bass response
those Little speakers will get toooo much power and go pOOFF as the
Voice Coils Burn Out

In a speaker the Wattage value is a peak-never-go-higher value controlled
by the Volume knob.

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user
adarshnarsaria (author)iceng2013-08-11

Dude I am not questioning your wisdom but i wrote PMPO not RMS

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user
iceng (author)adarshnarsaria2013-08-11

PMPO == Peak Music Power Output a value for an amp in my lexicon
.................and
RMS == Root Mean Squared a method for calculating non-sine heating power

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user
adarshnarsaria (author)iceng2013-08-13

can i control the power driving to the full range speaker by a potentiometer

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user
iceng (author)adarshnarsaria2013-08-13

The idea of a resistive element in series with both speakers in series can work.
A 20 watt pot would be huge and expensive, Iv only seen one such in my life..
A plain 25 watt resistor two or three times the combined speakers,
in series, resistance is where I would start.
Plus the resistor would dissipate the extra power as heat.

If you are not doing this for a learning experience.
I would just find a used  40 watt speaker and wire it direct to the amp.
And skip this torture of mismatched audio components..

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user
adarshnarsaria (author)2013-08-09

and please help with the enclosure also

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user
adarshnarsaria (author)2013-08-08

And i have a 2000 watts PMPO Amplifier can it drive the above speaker

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