Introducció
This manual provides comprehensive instructions for the installation, operation, and maintenance of your Pyramid PB2518 3,000-Watt 2-Channel Bridgeable Mosfet Amplifier. Please read this manual thoroughly before installation and operation to ensure proper use and to maximize the performance of your ampmés viu.

Figura 1: superior view of the Pyramid PB2518 ampvidador, espectacleasing its heatsink design and branding.
Informació de seguretat
Observeu sempre les següents precaucions de seguretat per evitar lesions o danys a la amplifier and connected components:
- Ensure the vehicle's battery is disconnected before making any power connections to the ampmés viu.
- Instal·leu el amplifier in a dry, well-ventilated location away from direct sunlight or heat sources.
- Feu servir un cablejat del calibre adequat per a les connexions d'alimentació, terra i altaveus, tal com s'especifica a la secció d'instal·lació.
- No opereu el amplifier if it has been exposed to moisture or shows signs of damage.
- Demaneu tot el servei a personal qualificat.
Característiques del producte
The Pyramid PB2518 amplifier incorporates several advanced features for optimal audio performance:
- Dos canals amplification with soft turn on/off circuitry.
- Remote turn-on capability for integration with head units.
- Power and Protection LED indicators for operational status.
- Maximum output of 1500 Watts per channel (2 channels) or 3000 Watts when bridged into 4 Ohms.
- 2 Ohm stereo stable operation.
- Heavy-duty aluminum alloy heatsink for efficient heat dissipation.
- Signal-to-Noise Ratio (S/N): >95dB.
- Resposta de freqüència: 15Hz-30KHz.
- Fully adjustable electronic crossovers (High Pass and Low Pass).
- Mosfet Pulse Width Modulation (PWM) power supplies.
- High and Low level inputs for versatile connectivity.
- Total Harmonic Distortion (THD): <0.04%.
- Variable Bass Boost (0-12dB at 50Hz).
- Variable Gain Control.
- High-level Molex input.
- Fully protected circuitry against overload, short circuit, and thermal issues.
Configuració i instal·lació
Una instal·lació correcta és crucial per a un rendiment òptim i una major durabilitat del vostre amplificador. Segueix aquests passos amb atenció.
1. Ubicació de muntatge
Choose a mounting location that is dry, well-ventilated, and secure. Ensure adequate airflow around the amplifier's heatsink. Avoid mounting in direct sunlight or near heat-generating components.
2. Connexions d'alimentació
Before making any connections, disconnect the vehicle's negative battery terminal. Connect the power, ground, and remote turn-on wires as follows:
- +12V (Alimentació): Connect a fused power cable directly from the positive (+) terminal of the vehicle's battery to the +12V terminal on the amplifier. The fuse should be located within 18 inches of the battery.
- GND (terra): Connect a ground cable of the same gauge as the power cable to a clean, unpainted metal surface of the vehicle's chassis. Ensure a solid electrical connection.
- REM (encesa remota): Connecteu un cable d'encesa remota des de la sortida remota de la unitat principal al terminal REM del amplificador. Aquest cable indica el amplificador per encendre i apagar amb la unitat principal.

Figura 2: posterior view of the Pyramid PB2518 amplifier, highlighting the power (GND, REM, +12V) and speaker output terminals.
3. Connexions d'entrada d'àudio
The PB2518 supports both High-Level and Low-Level (RCA) inputs.
- Entrada de baix nivell (RCA): For head units with RCA pre-outs, connect RCA cables from the head unit's audio output to the "INPUT" RCA jacks on the ampmés viu.
- High-Level Input (Molex): If your head unit does not have RCA outputs, use the supplied high-level input adapter. Connect the speaker wires from your head unit to the adapter, then plug the adapter into the "HIGH LEVEL" input on the ampmés viu.
4. Connexions d'altaveus
Connect your speakers to the "SPEAKER" terminals on the amplifier. Observe correct polarity (+ to + and - to -). The amplifier is 2 Ohm stereo stable and can be bridged for mono operation.
- Mode estèreo: Connect one speaker to the Right (+) and Right (-) terminals, and another speaker to the Left (+) and Left (-) terminals.
- Bridged Mode (Mono): To bridge the amplifier for a single channel (e.g., a subwoofer), connect the speaker's positive (+) terminal to the Right (+) terminal and the speaker's negative (-) terminal to the Left (-) terminal. Ensure the speaker impedance is 4 Ohms or higher when bridged. The amplifier can deliver up to 3000 Watts in bridged mode.

Figura 3: posterior view of the Pyramid PB2518 amplifier, illustrating the RCA inputs, high-level input, and various control knobs (Bass Boost, Crossover Mode, Gain).
Funcionant el Ampmés viu
Un cop instal·lat, ajusteu el ampConfiguració del lifer per a un rendiment d'àudio òptim.
1. Gain Control (Input Level)
The "INPUT LEVEL" (Gain) control matches the amplifier's input sensitivity to the output level of your head unit. Start with the gain set to minimum (MIN). Gradually increase the gain until you achieve a clear, undistorted sound at your desired volume level from the head unit. Avoid setting the gain too high, as this can introduce distortion and potentially damage speakers.
2. Configuració del crossover
The PB2518 features fully adjustable electronic crossovers to direct specific frequency ranges to your speakers or subwoofers.
- Crossover Mode Switch: Select between "FULL LP" (Full Range / Low Pass) or "HP" (High Pass).
- COMPLET: Passes the full audio frequency range to the speakers. Use this for full-range speakers or if your head unit handles crossovers.
- LP (Pas baix): Allows only frequencies below the set point to pass. Ideal for subwoofers. Adjust the "LOW PASS" knob to set the cutoff frequency (e.g., 50Hz-250Hz).
- HP (Pas alt): Allows only frequencies above the set point to pass. Ideal for full-range speakers or component speakers to prevent low frequencies from distorting them. Adjust the "HIGH PASS" knob to set the cutoff frequency (e.g., 120Hz-3KHz).
3. Augment dels baixos
The "BASS BOOST" control allows you to enhance low frequencies (around 50Hz) from 0dB to +12dB. Use this feature sparingly and adjust carefully to avoid distortion or damage to your speakers, especially subwoofers.
4. LED d'alimentació i protecció
- POWER (Green LED): S'il·lumina quan el ampEl transformador rep alimentació i funciona normalment.
- PROTECT (Red LED): S'il·lumina quan el amplifier detects a fault condition (e.g., short circuit, overheating, low voltage). If this LED lights up, immediately turn off your audio system and troubleshoot the issue.
Manteniment
The Pyramid PB2518 ampEl purificador requereix un manteniment mínim. Seguiu aquestes pautes per garantir la seva longevitat:
- Mantenir el ampEl lificador està net i lliure de pols i restes. Feu servir un drap suau i sec per netejar-lo.
- Ensure adequate ventilation around the heatsink. Do not block the cooling fins.
- Reviseu periòdicament totes les connexions del cablejat per assegurar-vos que estiguin ben fixades i que no presentin corrosió.
- No exposar el ampLifer a temperatures o humitat extremes.
Resolució de problemes
Si teniu problemes amb el vostre amplifier, consulteu els següents problemes i solucions habituals:
| Problema | Causa possible | Solució |
|---|---|---|
| Sense alimentació (LED d'engegada apagat) | Fusible fundit; connexió d'alimentació/terra fluixa; no hi ha senyal d'encesa remota. | Comproveu amplifier fuse and inline battery fuse. Verify +12V, GND, and REM connections are secure and receiving proper voltage. |
| LED de protecció encès (vermell) | Speaker short circuit; amplifier overheating; impedance too low; DC offset. | Check speaker wiring for shorts. Ensure adequate ventilation. Verify speaker impedance is within amplifier's limits. Allow amplificador per refredar. |
| Sense sortida de so | No input signal; gain set too low; speaker wires disconnected; incorrect crossover setting. | Check RCA/high-level input connections. Increase gain. Verify speaker connections. Adjust crossover settings. |
| So distorsionat | Gain set too high; poor ground connection; damaged speakers; incorrect crossover. | Reduce gain. Ensure solid ground connection. Inspect speakers for damage. Adjust crossover settings. |
| Soroll/xiuxiueig del motor | Poor grounding; RCA cables routed near power cables; faulty head unit. | Improve ground connection. Reroute RCA cables away from power cables. Consider a ground loop isolator. |
Especificacions
Technical specifications for the Pyramid PB2518 ampmés viu:
| Característica | Especificació |
|---|---|
| Número de model | PB2518 |
| Canals | 2 |
| Potència màxima de sortida (estèreo) | 2 x 1500 watts |
| Potència màxima de sortida (pontejada) | 1 x 3000 Watts (into 4 Ohms) |
| Impedància mínima | Estable estèreo de 2 ohms |
| Resposta de freqüència | 15Hz - 30KHz |
| Relació senyal/soroll (S/N) | > 95 dB |
| Distorsió harmònica total (THD) | <0.04% |
| Entrada Voltage | 12 volts (CC) |
| Dimensions (L x A x A) | 13.75 x 12.5 x 4 polzades (34.93 x 31.75 x 10.16 cm) |
| Pes | 3.7 quilograms (aprox. 8.16 lliures) |
Garantia i Suport
The Pyramid PB2518 amplifier comes with a limited one-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, accident, misuse, abuse, neglect, or unauthorized modification.
For warranty service or technical support, please contact Pyramid customer service. Keep your proof of purchase for warranty claims.
For further assistance, visit the official Pyramid website or contact their support channels. Refer to your product packaging or the Pyramid weblloc web per obtenir la informació de contacte més actualitzada.





