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Hammond@zk3.dec.com Archives
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These are the archives from Mark Longo's original Hammond List, 1994-97
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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] 145 leslie plot
For those clone users attempting, as closely as is reasonable, to
duplicate the frequency response of the b3/leslie - included here is
the frequency response of a 145 Leslie measured with the amplifier
driving a 16 ohm resistive load. This is only partly indicative of the
frequency response of the total package - amp, x-over, drivers,
enclosure, room, ears - but it does give some indication of the
amplifier design. the amp was delivering about 10 watts for this test.
the amplifier was flat down to 20 hz or lower. i was impressed.
again, i have no knowledge of whether this response is typical though
i have no reason to suspect the amplifier is defective in any way. the
source was driven through a combo preamp.
Leslie 145 Amplifier - Response into 16 ohm Load
4 ++------+--------+-------+-------+-------+--------+-------+------++
+ + + + + + + + +
Mag | : : : : : : : |
(dB) | : : : : : : : |
| : : : : : : : |
2 ++......................*****....................................++
| : : **** : ****: : : : |
| : :** : ** : : : |
| : ***** : : ** : : : |
| :**** : : : ** : : : |
0 ++*******..............................**........................++
| : : : : * : : |
| : : : : :* : : |
| : : : : : ** : : |
| : : : : : * : : |
-2 ++............................................*..................++
| : : : : : ***: : |
| : : : : : : : |
| : : : : : ** : |
-4 ++..................................................*............++
| : : : : : : * : |
| : : : : : : ** : |
| : : : : : : * : |
| : : : : : : *: |
-6 ++........................................................*......++
| : : : : : : :* |
| : : : : : : : * |
| : : : : : : : * |
| : : : : : : : * |
-8 ++...............................................................++
| : : : : : : : |
| : : : : : : : |
| : : : : : : : |
+ + + + + + + + +
-10 ++------+--------+-------+-------+-------+--------+-------+------++
0 2 4 6 8 10 12 14 16
Frequency (kHz)
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