BTB MMSR Preamp by John East * à vendre : 220 €

BTB MMSR Preamp by John East à vendre.
ce préamp est conçu pour la stingray ou n'importe quelle basse avec un seul micro.
il est néanmoins possible de lui ajouter n'importe quel potard (blend ou volume) switch etc !
jamais monté, dans sa boite :

BASS & TREBLE CONTROLS
The design of the 2 band EQ in the early Stingray© basses is unusual
in that it does not follow the types of topologies around which the
majority of equalisers are designed. It would seem that Leo Fender
designed it to create a particular sound rather than follow any
conventions, such as symmetrical EQ curves. Consequently the figures
shown may appear unusual to those familiar with such specifications.
In fact it's not easy to portray what this EQ does with a few numbers,
but in any case some figures, based around a flat response input
signal, are quoted as reference points.

NOTE: Like the original Bass/Treble EQ, this circuit does not have
a flat response when the controls are set midway. This unit is not
designed as a clinical tool, where what goes in, comes out at some
reference setting. However, the Mid Sweep circuit does have a neutral
setting in order to preserve the original feel of the Bass & Treble EQ.

TREBLE (+20dB / -16dB @ 10 kHz)
There is more boost than cut, giving rise the characteristic 'sizzle'
associated with the Stingray© style of EQ.

BASS (+14dB / -7dB @ 40Hz)
The bass control has a little more boost than the original. The
boost curve continues to rise towards the lower frequencies,
without flattening out at any frequency within the normal bass
guitar range. Conversly the cut characteristic is shelving, having
an essentially flat response from 30 - 100Hz, when fully cut.

MID LEVEL & FREQUENCY BOOST/CUT (+/-12dB)
The upper knob sets the amount of Mid boost or cut at frequencies
according to the setting of the Frequency knob. The midway indent
is the 'flat' setting.

FREQUENCY (100Hz - 1kHz or 200Hz - 2kHz)
The lower outer ring sets the continuously variable Mid frequencies
for boost or cut. DIL switches on the circuit board allow low or
high ranges to be set. Both switch sections should be set to ON for
the Low Range and both set to OFF for the High Range.

VOLUME
Sets the level from the bass and treble section of the preamp
feeding the mid section. This means that the pickup feeds the
preamp directly, allowing the best possible transfer of signal,
and full interraction of the pickup with the preamp. Since the
mid section is after the volume control, it feeds the jack
directly with a low impedance output.