I am struggling to model a driver in Hornresp. Help?

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Spasticteapot

Member
Joined 2006
#1
I'm currently attempting to model a simple front-loaded horn for a cone driver. (I'm aware this is not ideal, but this one has a fairly high EBP and thus should be pretty suitable.) I'd like to cross it over as low as possible.

The result is not good. Really not good. "How the heck did I lose all of my high frequency response on axis?" bad.

What did I screw up?

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#3
Hornresp appears to be yeeting my data into the abyss, but here's a copy rescued from the bit-bucket. Thanks!

ID = 55.30

Comment = NEW RECORD - NEW RECORD - NEW RECORD - Input wizard | Front loaded oblate sp

|RADIATION, SOURCE AND MOUTH PARAMETER VALUES:

Ang = 2.0 x Pi
Eg = 7.75
Rg = 0.00
Cir = 1.24

|HORN PARAMETER VALUES:

S1 = 15.00
S2 = 300.00
Obl = 17.00
F12 = 489.87
S2 = 0.00
S3 = 0.00
L23 = 0.00
AT = 0.00
S3 = 0.00
S4 = 0.00
L34 = 0.00
F34 = 0.00
S4 = 0.00
S5 = 0.00
L45 = 0.00
F45 = 0.00

|TRADITIONAL DRIVER PARAMETER VALUES:

Sd = 15.00
Bl = 2.11
Cms = 5.92E-04
Rms = 0.58
Mmd = 1.31
Le = 0.03
Re = 3.38
Nd = 1

|ADVANCED DRIVER PARAMETER VALUES FOR SEMI-INDUCTANCE MODEL:

Re' = 0.00
Leb = 0.00
Le = 0.00
Ke = 0.00
Rss = 0.00

|ADVANCED DRIVER PARAMETER VALUES FOR FREQUENCY-DEPENDENT DAMPING MODEL:

Rms = 0.00
Ams = 0.00

|PASSIVE RADIATOR PARAMETER VALUE:

Added Mass = 0.00

|CHAMBER PARAMETER VALUES:

Vrc = 0.30
Lrc = 8.00
Ap1 = 0.10
Lp = 0.10
Vtc = 0.00
Atc = 0.00

Acoustic Path Length = 0.0

|MAXIMUM SPL PARAMETER VALUES:

Pamp = 100
Vamp = 25
Iamp = 4
Pmax = 20
Xmax = 1.1

Maximum SPL Setting = 3

|ABSORBENT FILLING MATERIAL PARAMETER VALUES:

Fr1 = 0.00
Fr2 = 0.00
Fr3 = 0.00
Fr4 = 0.00

Tal1 = 100
Tal2 = 100
Tal3 = 100
Tal4 = 100

|ACTIVE BAND PASS FILTER PARAMETER VALUES:

High Pass Frequency = 0
High Pass Slope = 1
Low Pass Frequency = 0
Low Pass Slope = 1

Butterworth High Pass Order = 1
Butterworth Low Pass Order = 1
Linkwitz-Riley High Pass Order = 2
Linkwitz-Riley Low Pass Order = 2
Bessel High Pass Order = 1
Bessel Low Pass Order = 1

2nd Order High Pass Q = 0.5
2nd Order Low Pass Q = 0.5
4th Order High Pass Q = 0.5
4th Order Low Pass Q = 0.5

Active Filter Alignment = 1
Active Filter On / Off Switch = 1

|PASSIVE FILTER PARAMETER VALUES:

Series / Parallel 1 = S
Series / Parallel 2 = S
Series / Parallel 3 = S
Series / Parallel 4 = S

|EQUALISER FILTER PARAMETER VALUES:

Band 1 Frequency = 0
Band 1 Q Factor = 0.01
Band 1 Gain = 0.0
Band 1 Type = -1
Band 2 Frequency = 0
Band 2 Q Factor = 0.01
Band 2 Gain = 0.0
Band 2 Type = -1
Band 3 Frequency = 0
Band 3 Q Factor = 0.01
Band 3 Gain = 0.0
Band 3 Type = -1
Band 4 Frequency = 0
Band 4 Q Factor = 0.01
Band 4 Gain = 0.0
Band 4 Type = -1
Band 5 Frequency = 0
Band 5 Q Factor = 0.01
Band 5 Gain = 0.0
Band 5 Type = -1
Band 6 Frequency = 0
Band 6 Q Factor = 0.01
Band 6 Gain = 0.0
Band 6 Type = -1

|STATUS FLAGS:

Auto Path Flag = 0
Lossy Inductance Model Flag = 0
Semi-Inductance Model Flag = 0
Damping Model Flag = 0
Closed Mouth Flag = 0
Continuous Flag = 1

|OTHER SETTINGS:

Filter Type Index = 0
Filter Input Index = 0
Filter Output Index = 0

Filter Type = 3

MEH Configuration = 0
ME Amplifier Polarity Value = 1
 
#6
Parabolic or conical WG for least horn 'color' and either damp the terminus perimeter with a suitable density 'baffle' or Dr. Geddes' 300 ppi? horn insert. If you need horn gain, then the pioneer's exponential + damping and 'it is what it is' except maybe...... what's the driver?
 
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#7
For high frequency with cone driver, you have to raise compression ratio a little
Your SD and S1 is the same size. Make S1 smaller
You just dont want excessive compression.

If SD is 15 then try 9.2 or 5.7 likely at the most for S1

likely good old expo type horn, conical can emphasize the low end more, depends.
 
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