Drivers matching - Forum

Very interesting, the interest on this subject it is increased 414 views in less than a month but no response

Hi,

That a difficult question and there is no easy or short answer, that's why you probably haven't received a reply yet.

There are a few key qualities when it comes to selecting a good driver for a speaker, whether it be active or passive.

- High sensitivity so that you will achieve your maximum SPL targets with reasonable amplifier power. Also power related distortion and compression are at lower level then. At low frequencies the sensitivity of the system is largely defined by the enclosure volume and alignment (sealed, vented, horn etc).

- Low distortion so that you will match your distortion targets and the speaker will sound clean without adding its own colour to the signal.

- Resonance free operation because you can't fix ringing with any sort of equalization.

- Reasonably flat frequency response when accounting for available filtering capabilities. Passive speakers need much flatter response to begin with due to lower filtering capacity. DSP based filters on the other hand can equalize with much higher precision.

DSP based filters on the other hand can equalize with much higher precision.

If we have a 2 way system with a DSP based filter that use in the crossover region a correction of 24dB/octave and one that use 6dB/octave which will be the differences of sound quality ? I'm referring just to the influences of this parameter.

Thanks

DSP based filters on the other hand can equalize with much higher precision.

If we have a 2 way system with a DSP based filter that use in the crossover region a correction of 24dB/octave and one that use 6dB/octave which will be the differences of sound quality ? I'm referring just to the influences of this parameter.

Thanks

Do you mean the slope of the crossover filter? Typically larger slope results in better sound quality because there is much less overlapping between the drivers and this results especially in better off axis response/directivity. It also improves distortion and power handling as the tweeter doesn't have to reproduce frequencies below the crossover region. Also typical cone break-up peaks seen in the woofers are filtered away with a steeper filter.

I'm referring to the situations when:
- are used two driver that was designed to work together and have a constructive fast roll-off at the crossover point, so because of that don't need a high correction in the DSP;
- are used two drivers that was not especially designed to work together and for matching is needed a high correction in the DSP. This situation is common in two cases: for expanding product range and when are minimized the costs.

Please tell me which will be the performances differences between the situation presented in the first and the second line. Thanks.

I'm referring to the situations when:
- are used two driver that was designed to work together and have a constructive fast roll-off at the crossover point, so because of that don't need a high correction in the DSP;
- are used two drivers that was not especially designed to work together and for matching is needed a high correction in the DSP. This situation is common in two cases: for expanding product range and when are minimized the costs.

Please tell me which will be the performances differences between the situation presented in the first and the second line. Thanks.

What you are stating is not correct. All drivers need crossover filtering, it is just a matter of design choice whether the engineer wants to use low or high order filters.

"What you are staying is not correct."
I was referring in general without making any mention that to specific a model/product...

"All drivers need crossover filtering"
Exactly this I was saying:" don't need a high correction in the DSP" and " is needed a high correction in the DSP".

"it is just a matter of design choice whether the engineer wants to use low or high order filters"
Are you trying to say that between a 2 way sistem that use a low or a high value filters it's no differences in performances ?

"it is just a matter of design choice whether the engineer wants to use low or high order filters"
Are you trying to say that between a 2 way sistem that use a low or a high value filters it's no differences in performances ?

I already answered to that question earlier: viewtopic.php?f=12&t=1982#p6777