Echo Mountain Audio JBL 4425 User Manual Download

Page: 14 / 14

Appendix B: Measured Frequency Response

Measured response for the 4425 factory crossover (orange curves) and the Echo Mountain
Charge

Coupled Crossover (blue curves) was obtained using 8 ohm dummy loads with an RME

ADI

2 Pro FS R BE audio interface and REW software.

200

2000

20000

Magnitude (dB)

Frequency (Hz)

Model 4425 Crossover

Stock (

Orange

) vs. Echo Mountain Charge

Coupled Equivalent (

Blue

)

Both L

Pads at Max

Summary of Contents for JBL 4425

Page 1: ...JBL Model 4425 Charge Coupled Crossover User Manual echomountainaudio com echo mountain audio altadena california...

Page 2: ...E 14 Introduction Thank you for your purchase of Echo Mountain Audio s charge coupled crossover boards for the JBL Model 4425 Studio Monitor The set of bare boards you have received are intended for D...

Page 3: ...specs home speakers 1993 k2 s5500 page10 jpg http www lansingheritage org images jbl specs home speakers 1993 k2 s5500 page11 jpg http www lansingheritage org images jbl specs home speakers 1993 k2 s5...

Page 4: ...sting snap lock PCB clips An example of a completed crossover installed in the factory crossover housing is shown in Figure 3 Note that the default configuration uses the factory inductor for the woof...

Page 5: ...5 Figure 2 PCB bottom side view...

Page 6: ...pendix A and on Solen s product page Components of the same type and rating from other manufacturers may be substituted at the user s discretion but it is the responsibility of the user to measure the...

Page 7: ...s close to the PCB as possible they should all be accessible from the top side of the board 6 Once the wires are de soldered or cut from the PCB you will need to remove them from the strain relief cla...

Page 8: ...sidue with a swab and isopropyl alcohol 2 Insert and solder the small 0 25W resistors RC1 RC3 RC5 RC8 on the top side of the board Clean off any residual flux residue with a swab and isopropyl alcohol...

Page 9: ...rint so trim off the excess length leaving enough to pass through the board and allow for a solder fillet on both sides 3 Now that you ve trimmed off the excess leads to the desired length you ll need...

Page 10: ...enter it and then remove the protective layer on the exposed side of double sided tape Place the battery and clip down on the right side of the crossover assembly mounting plate choosing the location...

Page 11: ...neath the PCB You can push pull the wires through your semi tightened zip tie loop until you have everything dressed properly and then tighten it fully and snip off the excess length 4 Align the assem...

Page 12: ...12 Figure 4 Completed crossover installed in speaker cabinet as viewed through woofer cutout top of image points towards top of speaker...

Page 13: ...6 2 uF PA Series 250V Solen PA620 2 4 C5A C5B Capacitor 8 2 uF PA Series 250V Solen PA820 2 4 C8A C8B Capacitor 16 uF PA Series 250V Solen PA1600 2 4 L1 Inductor 1 0 mH Air Core Solen S201 0 1 2 R1 R...

Page 14: ...Mountain Charge Coupled Crossover blue curves was obtained using 8 ohm dummy loads with an RME ADI 2 Pro FS R BE audio interface and REW software 40 35 30 25 20 15 10 5 0 20 200 2000 20000 Magnitude...