TIC SP70vTA User manual

SP70vTA
8 to 70v In-Line Transformer
The TIC SP70vTA is a totally new idea in supplying a commercial grade exterior 70v in-line distribution
transformer for PA, telephony and multi line speaker use. It offers a simple alternative to the wiring,
solde ring or even poorly contained switches on speakers normally used for 70v supply.
This self contained SP70vTA unit offers weatherproof , dustproof 70v supply to almost any standard 8 Ohm
speaker including TIC’s famous Omnispeakers®, Rock Speakers or standard outdoor speakers. The
SP70vTA also offers “on the fly” switching between the most popular 70v tap wattages including 2.5W, 5W,
10W, 15W and 20W for ease of use in almost any installation.
Basic design of a 70v system:
The “standard” 70v a mplifiers shown above are set or “tapped” to 2.5W, 5W, 10W, 15W or 20W as desired

and required by the specific installation performance criteria.
The TIC SP70vTA exterior 70v switch is stated as being capable of supplying 70v installations world wide.
A b asic equivalency chart is shown below:
Tap “
5W ”“ 10W ”“ 15W ”“ 20W ”
Equivalent
output
120V 100V 70V 50V
70v in - line distributed audio systems generally require less cable gauge than standard 4/6/8 Ohm
systems. However some attention should be paid to th e cable type vs speakers used to obtain the right
output. Note the general recommendations below:
C able type 5W 10W 15W 20W
15G
( 1.29mm )
4300mm 2150mm 1400mm 1100mm
18G
( 1.02mm)
2700mm 1350mm 900mm 675mm
20G
(0.813mm)
1700mm 840mm 550mm 420mm
Please carefully select the receiver amplifier input side or “IN Amplifier” side of the TIC SP70vTA
transformer and remove the screw cap. Insert your cable from the amplifier being careful not to lose
or misplace the waterproof “O ring” or washer seal. Strip abou t half inch of insulation from the positive
and negative/ common cables and screw connect accordingly. Re-tighten the screw/ seal over the
cable to complete that connection. See picture below:

Please repeat carefully on the “Output” s ide to the speaker.
The TIC SP70vTA is normally factory pre - installed at a setting of 8Ohms to alleviate mistakes by those
less familiar with distributed audio systems. You should carefully check this setting and then choose
your preferred wattage tap 2.5/5/10/15/20W tap based upon the requirements of your particular
installation. Experienced audio installers will know and should note; not to exceed acceptable
impedance matching at the chosen receiver amplifier for the system.

Power/ voltage drops or dead zones in an audio installation or broadcast area are always of concern.
Please note the recommended cable gauge vs cable runs listed below:
Some gene ral notes to ensure a trouble free installation;
1. Pay close attention to your installation hook ups, pay attention to “phase” . Ensure it’s positive
to positive and negative to negative. I nsuring Proper Polarity; When connecting multiple
TIC outdoor speaker systems, it is absolutely vital that you observe proper polarity at all times.
If you mix the polarity, the sound delivered by your sound system will be substandard. The
system may sound excessively “boomy”, and output levels may be substantially diminishe d. It
is also possible some damage to the amplifier or TIC speaker components may occur.
2. Ensure the combined Impedance of your installation does not go below that accepted by your
chosen Receiver Amplifier as this will cause poor or lack of performance and possibly amplifier
damage.
3. Ensure your amplifier volume is set to minimal when first powering the system.
Distance 15m 45m 60m 75m
Cable
gauge
18g 16g 14g 12g