The final page of this catalog shows the Continental organ alongside other sound equipment: microphones, echo unit, channel mixer and the VOX treble booster:
A miniature "overtone" unit which plugs into the amplifier adding a super extra "zing" to the treble. Inexpensive and easy to use, the VOX Treble Booster brings out the full tonal range of stringed instruments. A real boon to the lead guitarist.
$4499
$4490
$3650
$3099
$2999
$2395
$1999
$1600
$1250
$1250
$1120
$1000
$880
$849
$750
$750
$625
$495
$400