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.
$699
$600
$1200
$900
$375
$1100
$750
$775
$800
$599
$150
$485
$174
$795
$675
$1000
$1000
$3960
$600
$100