- PREMIUM MONOBLOCK BASS POWER: The Synergy Mobile Audio SYN 3.5K mono Class D amplifier is engineered with high-end circuit design and premium internal components to deliver reliable, high-output bass performance.
- AUDIOPHILE-GRADE INTERNAL COMPONENTS: Built with South Korean Samyoung capacitors, Texas Instruments op-amps and ICs, German WIMA film and filter capacitors, and Fairchild chipsets for low distortion, efficiency, and long-term durability.
- POWERFUL REAL-WORLD RMS OUTPUT: Delivers 3,500W RMS at 1 ohm @ 14.4V and up to 5,025W RMS at 16V, making it ideal for high-power subwoofer systems in daily drivers, demo builds, and SPL competition vehicles.
- FULL ACTIVE BASS CONTROL: Adjustable subsonic (10Hz–50Hz) and low-pass (35Hz–250Hz) filters combined with a high damping factor (>200) provide tight, controlled bass across a wide range of enclosures.
- OVERBUILT CONNECTIONS & THERMAL DESIGN: Features dual 0-gauge power and ground terminals, nickel-plated 8-gauge speaker outputs, locking Tiffany RCA connections, multiple power transformers, and a high-mass aluminum heat sink for stable operation under extreme load.
Synergy Audio 3500 Watts RMS 1 Ohm Mono Class D Car Audio Amplifier SYN 3.5K
This Listing Includes:
- (1) Synergy Audio SYN Series SYN 3.5K Class D Monoblock Amplifier
- (1) Remote gain control with power and clip indicators
- (1) Owner’s manual
The Synergy Audio SYN 3.5K is a 1-ohm-capable Class D monoblock amplifier built to deliver powerful, controlled bass for daily drivers, demo vehicles, and serious SPL-focused systems. Rated at 3,500 watts RMS at 1 ohm on 14.4V, it provides the current delivery and tuning range needed to support demanding subwoofer setups.
Premium internal components—including South Korean Samyoung capacitors, Texas Instruments op-amps and ICs, German WIMA film and filter capacitors, and Fairchild chipsets—support efficient, reliable performance. Four high-current power transformers, a heavy-duty double-sided 2 oz. copper PCB, and a high-mass thermally optimized aluminum heat sink help the SYN 3.5K perform under demanding conditions.
Built-in subsonic and low-pass filters, adjustable input sensitivity, and the included remote gain control allow for precise bass-system tuning. With up to 16V operating capability, the SYN 3.5K is ready for properly upgraded electrical systems.
Features
- 1-ohm-capable Class D monoblock design
- 3,500W RMS at 1 ohm on 14.4V
- Up to 5,025W RMS at 1 ohm on 16V
- Included remote gain control with power and clip indicators
- Adjustable subsonic and low-pass filters
- Up to 16V operating capability for upgraded electrical systems
- (4) high-current power transformers
- Premium Samyoung capacitors, WIMA capacitors, TI ICs, and Fairchild chipsets
- Dual 0-gauge power and ground terminals
- Nickel-plated locking Tiffany-style RCA inputs and outputs
- Nickel-plated 8-gauge speaker outputs
- High-mass thermally optimized aluminum heat sink
- Heavy-duty double-sided 2 oz. copper PCB
- Intelligent multi-level protection circuitry
Specifications:
- Amplifier Type: Class D Monoblock
- Power Output at 1 Ohm, 14.4V: 3,500W RMS
- Power Output at 2 Ohms, 14.4V: 2,600W RMS
- Power Output at 4 Ohms, 14.4V: 1,500W RMS
- Power Output at 1 Ohm, 16V: 5,025W RMS
- Frequency Response: 10 Hz–250 Hz
- Signal-to-Noise Ratio: Greater than 85 dB
- Damping Factor: Greater than 200
- Subsonic Filter: 10 Hz–50 Hz
- Low-Pass Filter: 35 Hz–250 Hz
- Input Sensitivity: 200 mV–6V
- Power and Ground Terminals: Dual 0-gauge
- Speaker Outputs: Nickel-plated 8-gauge
- Power Transformers: (4) High-current transformers
- PCB: Double-sided 2 oz. copper board with thick copper traces
- Heat Sink: High-mass, thermally optimized aluminum
Dimensions:
- Length: 19.69"
- Width: 9.45"
- Height: 2.44"
Accepted Payment Methods at Big Jeff Audio
At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:
Credit and Debit Cards
- Visa
- Mastercard
- American Express
- Discover
- Diners Club
Digital Wallets
- Amazon Pay
- Apple Pay
- Meta Pay (formerly Facebook Pay)
- Google Pay
- Shop Pay
- PayPal
International Payment Methods
Bank Transfers
Financing Options
We also offer financing options to make purchasing easier. Learn more about our financing options here.
- Klarna
- Affirm
- Sezzle
- Snap
- Acima
- Tiptop
If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.
Shipping Options and Delivery Time
Do You Offer Expedited Shipping?
Yes! At checkout, you can select from different shipping options:
- Standard Shipping: Free for orders over $100.
- Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.
How Long Does Delivery Take?
- Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
- Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.
What Happens If My Package Is Undeliverable?
If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.
Why Can’t I Track My Order?
If you're having trouble tracking your order:
- Make sure you’ve received the shipping confirmation email with the tracking number.
- Log into your account on our website and use the “Check Your Order Status” button.
- If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.
