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RESISTOR/CAPACITOR SUBSTITUTION TABLES fOR PROGRAMMING CUSTOM CROSSOVER fREQUENCIES IN LINKWITZ-RILEY (10B-LR) MODELS
The resistors used to program specific crossover frequencies in the Linkwitz-riley filters are often installed directly on the 10B-LR main
boards, but they can also be installed on small programming boards as shown in the illustration “10B-LR PROGRAMMABLE LINK-
WITZ-RILEY STEREO CROSSOVER”. Since the resistor values are dependent on the capacitor values used on the 10B-LR main
board it is essential that the exact capacitor values are determined before attempting to find the correct resistor values for any particular
crossover frequency. You may notice that the low pass capacitors (C1a, C1b, C2a & C2b ~ six axial capacitors in a row in the front left
quadrant of the board) may be either 20nF, 22nF or 24nF. Also, please note that C1 is actually formed by paralleling two capacitors of
the same value. Parallel capacitors are also used, on occasion, to produce other values of capacitance where needed. The value of
two capacitors in parallel is equal to the sum of the two capacitances.
Please note that Bryston recommends that any component substitutions be performed only by qualified service personel and that
Bryston cannot be held responsible for any damage caused by unqualified personel. Please contact your Bryston dealer or Bryston
Limited directly if you have any questions about performing any modifications to Bryston equipment.
Capacitors: Low pass: C1=40n, C2=20n, High Pass: C(ab)=4n7
LP HP HP LP HP HP
FREQ. Ra,Rb R1 R2 FREQ. Ra,Rb R1 R2
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11278 Hz 499R 2K100 4K220 11013 Hz 511R 2K150 4K320
10761 Hz 523R 2K210 4K420 10500 Hz 536R 2K260 4K530
10251 Hz 549R 2K320 4K640 10014 Hz 562R 2K370 4K750
9771 Hz 576R 2K430 4K870 9539 Hz 590R 2K490 4K990
9318 Hz 604R 2K550 5K110 9092 Hz 619R 2K610 5K230
8877 Hz 634R 2K670 5K360 8672 Hz 649R 2K740 5K490
8463 Hz 665R 2K800 5K620 8264 Hz 681R 2K870 5K760
8063 Hz 698R 2K940 5K900 7871 Hz 715R 3K010 6K040
7688 Hz 732R 3K090 6K190 7504 Hz 750R 3K160 6K340
7328 Hz 768R 3K240 6K490 7151 Hz 787R 3K320 6K650
6982 Hz 806R 3K400 6K810 6822 Hz 825R 3K480 6K980
6660 Hz 845R 3K570 7K150 6499 Hz 866R 3K650 7K320
6345 Hz 887R 3K740 7K500 6191 Hz 909R 3K830 7K680
6045 Hz 931R 3K920 7K870 5905 Hz 953R 4K020 8K060
5766 Hz 976R 4K120 8K250 5628 Hz 1K000 4K220 8K450
5517 Hz 1K020 4K320 8K660 5360 Hz 1K050 4K420 8K870
5260 Hz 1K070 4K530 9K090 5116 Hz 1K100 4K640 9K310
4980 Hz 1K130 4K750 9K530 4894 Hz 1K150 4K870 9K760
4769 Hz 1K180 4K990 10K000 4651 Hz 1K210 5K110 10K200
4539 Hz 1K240 5K230 10K500 4431 Hz 1K270 5K360 10K700
4329 Hz 1K300 5K490 11K000 4231 Hz 1K330 5K620 11K300
4108 Hz 1K370 5K760 11K500 4020 Hz 1K400 5K900 11K800
3936 Hz 1K430 6K040 12K100 3828 Hz 1K470 6K190 12K400
3752 Hz 1K500 6K340 12K700 3654 Hz 1K540 6K490 13K000
3562 Hz 1K580 6K650 13K300 3474 Hz 1K620 6K810 13K700
3411 Hz 1K650 6K980 14K000 3330 Hz 1K690 7K150 14K300
3234 Hz 1K740 7K320 14K700 3162 Hz 1K780 7K500 15K000
3092 Hz 1K820 7K680 15K400 3010 Hz 1K870 7K870 15K800
2947 Hz 1K910 8K060 16K200 2871 Hz 1K960 8K250 16K500
2814 Hz 2K000 8K450 16K900 2745 Hz 2K050 8K660 17K400
2680 Hz 2K100 8K870 17K800 2618 Hz 2K150 9K090 18K200
2547 Hz 2K210 9K310 18K700 2490 Hz 2K260 9K530 19K100
2426 Hz 2K320 10K000 20K000 2375 Hz 2K370 10K000 20K000
2316 Hz 2K430 10K200 20K500 2260 Hz 2K490 10K500 21K000
2207 Hz 2K550 10K700 21K500 2156 Hz 2K610 11K000 22K100
2108 Hz 2K670 11K300 22K600 2054 Hz 2K740 11K800 23K700
2010 Hz 2K800 11K800 23K700 1961 Hz 2K870 12K100 24K300
1914 Hz 2K940 12K400 24K900 1870 Hz 3K010 12K700 25K500
1821 Hz 3K090 13K000 26K100 1781 Hz 3K160 13K300 26K700
1737 Hz 3K240 13K700 27K400 1695 Hz 3K320 14K000 28K000
1655 Hz 3K400 14K300 28K700 1617 Hz 3K480 14K700 29K400
1576 Hz 3K570 15K000 30K100 1542 Hz 3K650 15K400 30K900
1505 Hz 3K740 15K800 31K600 1469 Hz 3K830 16K200 32K400
1436 Hz 3K920 16K500 33K200 1400 Hz 4K020 16K900 34K000
1366 Hz 4K120 17K400 34K800 1334 Hz 4K220 17K800 35K700
1303 Hz 4K320 18K200 36K500 1273 Hz 4K420 18K700 37K400
1242 Hz 4K530 19K100 38K300 1213 Hz 4K640 19K600 39K200
1185 Hz 4K750 20K000 40K200 1156 Hz 4K870 20K500 41K200
1128 Hz 4K990 21K000 42K200 1101 Hz 5K110 21K500 43K200
1076 Hz 5K230 22K100 44K200 1050 Hz 5K360 22K600 45K300
1025 Hz 5K490 23K200 46K400 1001 Hz 5K620 23K700 47K500
977 Hz 5K760 24K300 48K700 954 Hz 5K900 24K900 49K900
932 Hz 6K040 25K500 51K100 909 Hz 6K190 26K100 52K300
888 Hz 6K340 26K700 53K600 867 Hz 6K490 27K400 54K900
846 Hz 6K650 28K000 56K200 826 Hz 6K810 28K700 57K600
806 Hz 6K980 29K400 59K000 787 Hz 7K150 30K100 60K400
769 Hz 7K320 30K900 61K900 750 Hz 7K500 31K600 63K400
733 Hz 7K680 32K400 64K900 715 Hz 7K870 33K200 66K500
698 Hz 8K060 34K000 68K100 682 Hz 8K250 34K800 69K800
666 Hz 8K450 35K700 71K500 650 Hz 8K660 36K500 73K200
634 Hz 8K870 37K400 75K000 619 Hz 9K090 38K300 76K800
604 Hz 9K310 39K200 78K700 591 Hz 9K530 40K200 80K600
577 Hz 9K760 41K200 82K500 563 Hz 10K000 42K200 84K500
552 Hz 10K200 43K200 86K600 536 Hz 10K500 44K200 88K700
526 Hz 10K700 45K300 90K900 512 Hz 11K000 46K400 93K100
498 Hz 11K300 47K500 95K300 489 Hz 11K500 48K700 97K600
477 Hz 11K800 49K900 100K00 465 Hz 12K100 51K100 102K00
454 Hz 12K400 52K300 105K00 443 Hz 12K700 53K600 107K00
433 Hz 13K000 54K900 110K00 423 Hz 13K300 56K200 113K00
411 Hz 13K700 57K600 115K00 402 Hz 14K000 59K000 118K00
394 Hz 14K300 60K400 121K00 383 Hz 14K700 61K900 124K00
375 Hz 15K000 63K400 127K00 365 Hz 15K400 64K900 130K00
356 Hz 15K800 66K500 133K00 347 Hz 16K200 68K100 137K00
341 Hz 16K500 69K800 140K00 333 Hz 16K900 71K500 143K00
323 Hz 17K400 73K200 147K00 316 Hz 17K800 75K000 150K00
309 Hz 18K200 76K800 154K00 301 Hz 18K700 78K700 158K00
295 Hz 19K100 80K600 162K00 287 Hz 19K600 82K500 165K00
281 Hz 20K000 84K500 169K00 275 Hz 20K500 86K600 174K00
268 Hz 21K000 88K700 178K00 262 Hz 21K500 90K900 182K00
255 Hz 22K100 93K100 187K00 249 Hz 22K600 95K300 191K00
243 Hz 23K200 100K00 200K00 237 Hz 23K700 100K00 200K00
232 Hz 24K300 102K00 205K00 226 Hz 24K900 105K00 210K00
221 Hz 25K500 107K00 215K00 216 Hz 26K100 110K00 221K00
211 Hz 26K700 113K00 226K00 205 Hz 27K400 118K00 237K00
201 Hz 28K000 118K00 237K00 196 Hz 28K700 121K00 243K00
191 Hz 29K400 124K00 249K00 187 Hz 30K100 127K00 255K00
182 Hz 30K900 130K00 261K00 178 Hz 31K600 133K00 267K00
174 Hz 32K400 137K00 274K00 170 Hz 33K200 140K00 280K00
166 Hz 34K000 143K00 287K00 162 Hz 34K800 147K00 294K00
158 Hz 35K700 150K00 301K00 154 Hz 36K500 154K00 309K00
150 Hz 37K400 158K00 316K00 147 Hz 38K300 162K00 324K00
144 Hz 39K200 165K00 332K00 140 Hz 40K200 169K00 340K00
137 Hz 41K200 174K00 348K00 133 Hz 42K200 178K00 357K00
130 Hz 43K200 182K00 365K00 127 Hz 44K200 187K00 374K00
124 Hz 45K300 191K00 383K00 121 Hz 46K400 196K00 392K00
118 Hz 47K500 200K00 402K00 116 Hz 48K700 205K00 412K00
113 Hz 49K900 210K00 422K00 110 Hz 51K100 215K00 432K00
108 Hz 52K300 221K00 442K00 105 Hz 53K600 226K00 453K00
103 Hz 54K900 232K00 464K00 100 Hz 56K200 237K00 475K00
98 Hz 57K600 243K00 487K00 95 Hz 59K000 249K00 499K00
93 Hz 60K400 255K00 511K00 91 Hz 61K900 261K00 523K00
89 Hz 63K400 267K00 536K00 87 Hz 64K900 274K00 549K00
85 Hz 66K500 280K00 562K00 83 Hz 68K100 287K00 576K00
81 Hz 69K800 294K00 590K00 79 Hz 71K500 301K00 604K00
77 Hz 73K200 309K00 619K00 75 Hz 75K000 316K00 634K00
73 Hz 76K800 324K00 649K00 72 Hz 78K700 332K00 665K00
70 Hz 80K600 340K00 681K00 68 Hz 82K500 348K00 698K00
67 Hz 84K500 357K00 715K00 65 Hz 86K600 365K00 732K00
63 Hz 88K700 374K00 750K00 62 Hz 90K900 383K00 768K00
60 Hz 93K100 392K00 787K00 59 Hz 95K300 402K00 806K00
58 Hz 97K600 412K00 825K00 56 Hz 100K00 422K00 845K00
55 Hz 102K00 432K00 866K00 54 Hz 105K00 442K00 887K00
53 Hz 107K00 453K00 909K00 51 Hz 110K00 464K00 931K00
50 Hz 113K00 475K00 953K00 49 Hz 115K00 487K00 976K00
48 Hz 118K00 499K00 1M0000 47 Hz 121K00 511K00 1M0200
45 Hz 124K00 523K00 1M0500 44 Hz 127K00 536K00 1M0700
43 Hz 130K00 549K00 1M1000 42 Hz 133K00 562K00 1M1300
41 Hz 137K00 576K00 1M1500 40 Hz 140K00 590K00 1M1800