Real answers from people
who built your gear.

Start with the basics: (1) Confirm the power switch is on and the power indicator LED is lit. (2) Check the MUTE button — it's easy to accidentally engage. (3) Verify the master volume and gain are turned up. (4) Try a different instrument cable, as cables are the most common failure point. (5) Check the speaker cable connection at both the amp and cabinet. If none of these resolve it, submit a support ticket with your serial number.

All Bi-series amplifiers are rated at full power (500W or 1000W RMS) at both 4Ω and 8Ω. You can safely run a 4-ohm or 8-ohm cabinet. Do not run below 4Ω — connecting two 4Ω cabinets in parallel creates a 2Ω load which is outside the amp's rated range. The 4/8 ohm selector switch on the rear panel must match your cabinet load.

Occasional limiter activity is normal and expected — it means the amp is protecting itself and your speakers. Constant limiter engagement usually means your gain is set too high for the input signal. Try reducing the gain control and compensating with the master volume. If the limiter stays on at low gain levels, this could indicate a preamp-stage issue — submit a support ticket.

Yes — Form Factor cabinets are designed to work together. The most important factor is combined impedance load. If running two cabinets, ensure the parallel impedance stays at 4Ω or higher. For example: two 8Ω cabs = 4Ω total load, which is safe. Two 4Ω cabs = 2Ω, which is not recommended. Ceramic and Neo drivers have different character (ceramic = warm/punchy, neo = articulate/focused) so blending can create a compelling hybrid tone.

First, check that all cabinet hardware (handles, jack plate screws, grille bolts) is tight — loose hardware is the most common rattle source. Also check that the speaker mounting screws are secure. If the rattle is from the speaker cone itself (a "voice coil rub" sound, often heard as a fuzzy or distorted tone), stop using the cab immediately and submit a warranty ticket — this is covered under our 2-year warranty.

The Form Factor Audio 2-year warranty covers all manufacturing defects in materials and workmanship, including PCB components, power supply, speaker drivers (under normal use), and cabinet joinery. It does not cover physical damage from misuse, water damage, or damage from running below the minimum impedance rating. Warranty is non-transferable and applies to the original purchaser. Download the full warranty policy above.

Download the Warranty Registration Card above, fill it out completely (including serial number, purchase date, and retailer), and email a photo or scan to info@formfactorpro.com within 30 days of purchase. Keep your receipt — you'll need it for any warranty claim.

Most warranty repairs are completed and returned within 7–10 business days of receiving the unit. We'll email you a pre-paid shipping label for warranty work. For out-of-warranty service, we'll send a diagnostic and estimate within 2 business days of receiving the unit, and complete approved repairs within 5–7 days after approval.

Technical support and access to manuals is available for all Form Factor Audio products regardless of where or when they were purchased. Warranty coverage is non-transferable, so second-hand units are supported on a paid-service basis. We still want your gear working perfectly — reach out and we'll find the right path.