Showing posts with label boost. Show all posts
Showing posts with label boost. Show all posts
This preamp circuit was designed around from CD player, tuner, Tape Recorder, etc., offers 4 AC voltage gain at least sensitive power amplifiers to cope. Fi House modern devices often with small loudspeaker cabinets installed, the low frequency range rather sacrificed. This circuit includes a low amp to overcome this problem. You can use a variable resistance, Bass Boost 0 maximum value + 16 dB @ 30 Hz. If a fixed maximum necessary boost value variable resistance can be omitted and replaced by a switch.



The parts list:

Notes:
  • Diagram shows left channel only, but R1, R2, R3 and C1, C2, C3, which are common to both channels.
  • For stereo operation P1, P2 (SW1), R4, R5, R6, R7, R8, and C4, C5, C6, C7 should be doubled.
  • Figures in parentheses indicate PIN for the right IC1 channel connections.
  • A protocol for P2 type ensures a more linear regulators of bass boost.
  • Need for a simple boost with launch of thumb out - process P2 shall be omitted and SW1 added, as shown in the diagram.
  • Bipolar stereo operation must be an SW1 type.
  • Please note that the SW1, increasing use is if the switch is open and turning off closing switch.

Source: stereo with bass boost preamplifier
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