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Multi-Way Conventional loudspeakers with crossovers

Combining cross overs
Combining cross overs
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Old 30th June 2020, 10:36 AM   #11
EarlK is offline EarlK  Canada
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Join Date: Mar 2006
Location: Toronto (GTA), Ontario
Here's an example where it's not really practical to combine the 2 functions of HiPass with that of Response Flattening .

Click the image to open in full size.

This "Trace" belongs to "grahamgraham" .

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Old 30th June 2020, 01:59 PM   #12
EarlK is offline EarlK  Canada
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Join Date: Mar 2006
Location: Toronto (GTA), Ontario
Kris,

Here's an example of a filter that combines the functions of the HiPass with that of a HF Compensation Circuit ( which flattens the overall HF response ).

This is one of my Peerless drivers on a 152i Clone wavequide.

BTW; R1 + R2 are bypassed here ( iow; they are not in circuit so ignore their presence or values ) ).

- The same "out-of-circuit" observation applies to the 2 pictured PEQ circuits seen ( L4,C4,R4 + L3,C3,R3 ) . They aren't active + are not there ( functionally ).

Combining cross overs-3-pole_simple_ek_2i2_-png

This filter also employs a mild "Bump-Filter" ( at cut-off ) to PEQ boost a small area .

Here's a shot of the filters transfer function.

Combining cross overs-3-pole_simple_ek_2i2_filter_-png

Again, this combo approach is only doable when the HF response presents a "good-enough" straight line.

These simple horn circuits are quite widely found in many Sound Reinforcement crossovers.



:
Attached Images
File Type: png 3-Pole_Simple_ek_2i2_.PNG (44.2 KB, 42 views)
File Type: png 3-Pole_Simple_ek_2i2_filter_.PNG (17.2 KB, 31 views)
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Old 30th June 2020, 05:06 PM   #13
EarlK is offline EarlK  Canada
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Join Date: Mar 2006
Location: Toronto (GTA), Ontario
Here's a look at one way to handle the gentle roll-off curve seen in grahamgraham's trace of the Peerless driver on the STH100 waveguide.

Again, C2 is shorted and the LCR notch ( L3,C3,R3 ) isn't engaged.

Combining cross overs-2-pole_peq-hf_ek_2i2_-png

The red curve ( seen above ) is the raw response ( I've used a zma file from my own files to make this happen > so the simulation is only so-so ).


And here's what the electrical filter is actually doing along with an impedance trace.
- Both "Peaking" filters betray their presence ( when looking at the dips in the overall impedance ).

Combining cross overs-2-pole_electrical-impedance_ek_2i2_-png

Attached Images
File Type: png 2-Pole_PEQ on HF_ek_2i2_.PNG (49.1 KB, 17 views)
File Type: png 2-Pole_electrical+Impedance_ek_2i2_.PNG (54.6 KB, 17 views)
 

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