Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance,
(Ohms)

1600

5

47K

374000

800

5

47K

40200

400

5

47K

15800

200

5

47K

7870

100

5

47K

4290

50

5

47K

3010

400

10

47K

374000

300

10

47K

97600

200

10

47K

40600

100

10

47K

15800

60

10

47K

9310

40

10

47K

6650

100

20

47K

374000

80

20

47K

133000

60

20

47K

62000

40

20

47K

31600

20

20

47K

14000

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

1600

5

47K

309000

800

5

47K

37400

400

5

47K

14000

200

5

47K

6570

100

5

47K

3500

50

5

47K

2100

400

10

47K

309000

300

10

47K

88700

200

10

47K

37400

100

10

47K

14000

60

10

47K

7870

40

10

47K

5360

100

20

47K

309000

80

20

47K

107000

60

20

47K

52300

40

20

47K

26100

20

20

47K

10700

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

600

8

47K

287000

450

8

47K

88700

300

8

47K

38300

200

8

47K

21500

150

8

47K

15400

75

8

47K

7870

150

16

47K

287000

125

16

47K

121000

100

16

47K

66500

80

16

47K

43000

60

16

47K

27400

40

16

47K

16500

40

32

47K

374000

30

32

47K

133000

20

32

47K

62000

10

32

47K

31600

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

600

8

47K

221000

400

8

47K

60400

300

8

47K

34000

200

8

47K

18200

100

8

47K

8060

80

8

47K

6340

40

8

47K

3240

20

8

47K

1780

160

16

47K

348000

140

16

47K

165000

120

16

47K

90900

100

16

47K

60400

80

16

47K

37400

60

16

47K

24300

40

16

47K

13700

20

16

47K

6340

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

160

16

47K

360000

140

16

47K

162000

120

16

47K

93100

100

16

47K

59000

80

16

47K

38300

60

16

47K

24200

40

16

47K

14100

20

16

47K

6540

40

32

47K

360000

35

32

47K

162000

30

32

47K

94100

25

32

47K

59300

20

32

47K

38300

15

32

47K

24200

10

32

47K

14100

5

32

47K

64900

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

250

13

47K

1430000

200

13

47K

174000

150

13

47K

73400

100

13

47K

35700

75

13

47K

24100

50

13

47K

15600

60

26

47K

649000

40

26

47K

84500

30

26

47K

47000

20

26

47K

26100

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

445

3.1

47K

5069

400

3.1

47K

4509

371

3.1

47K

4155

250

3.1

47K

2728

150

3.1

47K

1608

100

3.1

47K

1066

80

3.1

47K

853

50

3.1

47K

537

445

6.2

47K

29922

400

6.2

47K

25283

371

6.2

47K

22579

250

6.2

47K

13183

150

6.2

47K

7142

100

6.2

47K

4554

80

6.2

47K

3587

50

6.2

47K

2202

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

445

3.2

47K

4722

400

3.2

47K

4204

371

3.2

47K

3875

250

3.2

47K

2548

150

3.2

47K

1502

100

3.2

47K

996

80

3.2

47K

797

50

3.2

47K

500

445

6.4

47K

26994

400

6.4

47K

22941

371

6.4

47K

20557

250

6.4

47K

12144

150

6.4

47K

6625

100

6.4

47K

4234

80

6.4

47K

3337

50

6.4

47K

2048

Desired Cartridge Load Impedance
(Ohms)

Desired Stepup Ratio

Phono preamp input impedance

Required parallel resistance
(Ohms)

250

12

47K

160472

150

12

47K

41193

100

12

47K

21502

80

12

47K

15886

50

12

47K

8999

80

24

47K

3847570

50

24

47K

76773
