the nordstrand preamp
3b preamp
The new Nordstrand Preamp is now shipping and will be available from dealers now. There are 6 different configuations:
3B
3 band bass preamp with 3 eq pots.
3B-5a
PREWIRED - 3 band bass preamp with volume (pull passive), blend, treble, mid (pull frequency switch), and bass
3B-5b
PREWIRED - 3 band bass preamp with volume (pull passive), blend, tone, push pull frequency selector on mid, and treble/bass stack
3B-4a
PREWIRED - 3 band bass preamp with volume/volume stack, tone (pull passive), mid (pull frequency switch), and treble/bass stack
3B-4b
PREWIRED - 3 band bass preamp with volume/tone stack, blend, mid (pull frequency switch), and treble/bass stack
3B-3
PREWIRED - 3 band bass preamp with volume (pull passive), mid (pull frequency switch), and treble/bass stack
3b preamp specs:
- Overall gain is +/- 10db by a trim pot on the circuit board.
- Bass +/- 12db @ 50Hz
- Treble +/- 12db @4khz
- Midrange +/- 12db @ 1k with no external capacitors. Add two capacitors as indicated in the table to change the frequency.
Frequency |
200Hz |
300Hz |
400Hz |
500Hz |
600Hz |
700Hz |
800Hz |
900Hz |
1khz |
To outside lugs of mid pot |
68nf |
47nf |
33nf |
22nf |
15nf |
8.2nf |
5.6nf |
1.2nf |
N/A |
To gray leads from circuit board |
390nf |
190nf |
120nf |
82nf |
56nf |
47nf |
27nf |
12nf |
N/A |
We stock capacitors for the even numbered frequencies and will include one set with each preamp for a second frequency of your choice.
Battery life is estimated to be around 180 hours for an alkaline 9v. Adding a battery to make it 18v will give more headroom and longer life.
2b preamp
There are 6 different configurations:
2B
2 band bass preamp with 2 eq pots
2B-4a
PREWIRED - 2 band bass preamp with volume (pull passive), volume, bass and treble
2B-4b
PREWIRED - 2 band bass preamp with volume (pull passive), blend, treble, and bass
2B-3a
PREWIRED - 2 band bass preamp with volume (pull passive), treble, and bass
2B-3b
PREWIRED - 2 band bass preamp with volume (pull passive), blend, and treble on bass (stack)
2B-4c
PREWIRED - 2 band bass preamp with volume (pull passive), blend, tone, and treble on bass (stack)
2b preamp specs:
- Overall gain is +/- 10db by a trim pot on the circuit board.
- Bass +/- 12db @ 50Hz
- Treble +/- 12db @4khz
Battery life is estimated to be around 180 hours for an alkaline 9v. Adding a battery to make it 18v will give more headroom and longer life.
the nordstrand outboard preamp
3 band outboard
The new Nordstrand Outboard Preamp is now in it's first prototype stages and will be available soon.
outboard preamp specs:
- Preamp bypass switch
- Bass +/- 12db @ 50Hz
- Treble +/- 12db @4khz
- Midrange +/- 12db @ 1k or 400hz