Holm DSPre 1, User Manual

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CONTENTS iii
12.1.4 Uploading the Extended Range Filters . . . . . . . . . . . . . . . . . 50
12.2 Customization and Presentation Options . . . . . . . . . . . . . . . . . . . . 51
12.3 Correcting a Bass/Subwoofer (DSPre-2,3-way) . . . . . . . . . . . . . . . . . 52
12.3.1 Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
12.3.2 Limit the Maximum Gain . . . . . . . . . . . . . . . . . . . . . . . . 54
12.4 Correcting a Midtone Driver (DSPre-2,3-way) . . . . . . . . . . . . . . . . . 56
12.5 Correcting a Tweeter (DSPre-2,3-way) . . . . . . . . . . . . . . . . . . . . . 56
12.6 Correcting a Bookshelf Speaker (DSPre-1-way) . . . . . . . . . . . . . . . . 56
III Appendices 57
A Support 58
A.1 The Forum at www.holmacoustics.com . . . . . . . . . . . . . . . . . . . . . 58
A.2 Emails to support@holmacoustics.com . . . . . . . . . . . . . . . . . . . . . 58
A.3 Remote Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
B Frequently Asked Questions 60
C Troubleshooting 61
D Technical Note - Measuring Response 62
D.1 Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
D.2 Nonlinearities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
E Technical Note - Fourier Transforms 63
E.1 The Time Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Index 64
HOLM Acoustics
HOLMFIR User Guide v0.4.4