SP-BT 30 (Blister) . BATTERY TERMINAL
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SUPER POWER AUDIODESIGNED IN ITALY
MMXXVI
1 × 8 GA.
Two clamps, one job.
The SP-BT 30 is a pair of copper-finish battery terminals, positive and negative, for 8 GA cable, supplied on a ready-to-hang blister card. A ring closes around the post with a stainless clamp bolt and nut, and a two-bolt wire clamp plate grips the stripped cable directly: no soldering, no crimping tools.
Why this terminal
8 GA (≈ 8.4 mm²) is the classic gauge for a single amplifier or accessory line. The wire clamp is sized for it: no adaptors.
Two bolts spread the clamping force along the conductor, so the cable does not pull out and the contact stays tight.
Both terminals in one blister: you replace positive and negative together, so both connections age at the same rate.
A stainless steel clamp bolt with nut closes the ring on the post until the terminal cannot rotate by hand.
60 × 30 × 26 mm: fits tight battery bays.
Replacement of worn terminals, auxiliary and second-battery installs, marine, camper and workshop 12 V points with top-post batteries.
Safety, installation step by step, wiring, troubleshooting and the full specifications.
⇩ Download the manual (PDF)PDF · English · 2026 edition
What's in the box
Positive (+) battery terminal, marked + · negative (−) battery terminal · orange blister card printed with the SP mark, the model SP-BT 30, the size 1×8GA and the CE marking.
Not included: battery cable, inline fuse and holder, ring terminals, heat-shrink.
Technical specifications
| TERMINALS | |
|---|---|
| Model | SP-BT 30 (BLISTER) |
| Type | Top-post battery terminals |
| Supply | 1 pair: + and − |
| Polarity marking | + on the positive terminal |
| CABLE | |
| Cable size | 1 × 8 GA (≈ 8.4 mm²) |
| Wire connection | Clamp plate, 2 bolts, no soldering |
| Fuse | Inline, ≤ 20 cm from battery, rated for cable |
| MATERIALS & FINISH | |
| Body finish | Copper-coloured plating |
| Post clamp | Stainless steel bolt with nut |
| Wire clamp bolts | Plated steel, hex head |
| MECHANICAL | |
| L × W × H | 60 × 30 × 26 mm |
| Post hole | Ø 17.5 mm |
| Ring outer diameter | Ø 30 mm |
| Wire clamp plate width | 24 mm |
| APPLICATION & PACK | |
| System voltage | 12 V negative ground |
| Package | Ready-to-hang blister card · 2 terminals (+ and −) |
| Certification mark | CE |
| Current rating | Not declared by the manufacturer |
MANUFACTURER'S DATA · NOMINAL VALUES, TOLERANCE ±1 MM · SUBJECT TO CHANGE WITHOUT NOTICE
Complete the system
Before you install it
- Disconnect the negative first. Remove the negative (−) terminal first and reconnect it last. Never let a tool touch the positive post and the bodywork at the same time.
- Fuse the circuit. Any cable taken from the battery positive needs an inline fuse within 20 cm of the terminal, never rated higher than the cable can carry.
- Correct cable only. The wire clamp is made for 8 GA (≈ 8.4 mm²). Do not force thicker cable, do not cut strands to make it fit.
- Check the post size. The ring must close around the post with the clamp bolt still able to tighten: a terminal that closes on itself without gripping is too big.
- 12 V systems only. For 12 V negative-ground passenger-vehicle batteries. Not for 24 V trucks or as a mains connector.
Questions installers ask
spaudio@spaudio.it · +39 340 807 8778
Accepted payment methods
Visa · Mastercard · Maestro · American Express · PayPal · Apple Pay · Google Pay · Shop Pay · Klarna
SP Audio — Super Power Audio. Designed in Italy by Audiocar Import & Export SRLS, Milano, official SP Audio distributor for Europe.