Form Factor BI500DI Bass Amp Head 500W

500-Watt Solid State Bass Guitar Amplifier Head. Made in the USA.
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Form Factor BI500DI Bass Amp Head 500W

Brand New

Description & Specs

From Form Factor:

The 500 watt bass amplifier from Form Factor Audio. Next-generation solid-state preamp and a true 500 watt module, deliver unparalleled tone, sound clarity and response. MADE IN USA.

Putting out 500 watts at 4Ω, the Bi500Di outperforms the competition when it comes to palpable tone, power and headroom. The smaller, lighter version of the Bi 1000 Di shares every component with its bigger brother, except for the Class D amp module, so the sound is the same, but with a different power output.

Ideal for live work, studio and rehearsals, the Bi500Di puts out serious SLP and can be pushed to surprising output levels without losing its signature tone or breaking up or clipping.

New on this model, 2 balanced XLR DI's, one pre-EQ and one post-EQ, allowing maximum flexibility in live and studio applications. 

As with the Bi1000Di, the Bi500Di has our updated, state of the art pre-amp, which was designed from the ground up to deliver the type of clarity, response time and tone that you’ve never heard from an amp this size. It lets you hear the bass the way it was meant to be heard, by enhancing the characteristics the luthier intended the instrument to have.

Hand built in California, featuring genuine Neutrik and Amphenol connectors and aerospace-grade chassis materials, the Bi500Di is high-end enough to be precious with, but tough enough to survive years and years of gigs and rehearsals.

Model: Bi500Di
Configuration: Class D Amplifier
Power Rating:
  • 500 Watts RMS @ 4Ω
  • 270 Watts RMS @ 8Ω< 1%THD
Mains input voltage and current:
  • Nominal rating: 115 / 230 VAC, 12.5/10.0 A
  • Absolute min/max: 90-132 / 180-264 VAC
Connectors: 2 x NL4 Speakon™ | 1 x Powercon™ | 6 x Neutrik 1/4″ | 2 x Balanced XLR's
Finish Options: Powder Coated Steel
Finish Color: Black
Controls: Gain | Limiter | Master | Mute
Tone Controls: Bass | Mid | Mid Frequency Selector | Treble
Weight: 7.5Lbs / 3.4 Kg
Physical dimensions: H 2.75” (70 mm) W 11.6” (295mm) D 9” (230mm)

You read that right! Any orders over $75 ship for free!*

The CME Difference:  CME's mission is to make sure your shipment will arrive quickly, carefully, and correctly. We realize that the online ordering of guitars and instruments, in general, can be a nerve-racking experience. We are here to put your mind at ease and make your transaction smooth and enjoyable! As musicians ourselves, we want to make sure everything gets to you the way it should, every time.

Most orders ship the same or next day:  
We greatly appreciate your patience, and are working hard to fulfill all requests as quickly as possible, while practicing recommended safety guidelines.

Our Bottom line: We care! This is something we take very seriously, because it's what you deserve. Our shipping, sales, and customer service teams are always striving to create the best experience for you. If you have any questions, comments, or concerns, we want to know.

Please don't hesitate to reach out to, or call us directly at 773-525-7773.

*Special exceptions do apply.



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10AM-7PM Saturday

10AM-5PM Sunday

Before & After Hours: Try us! 
If we are not available, our commitment is to get back to you no later than the next day.

US & International: +1 (773) 525-7773

Fax: 773-525-2775


3316 N Lincoln Avenue Chicago, IL 60657

We're right off the CTA Brown Line 'Paulina' Stop Just North of Belmont and just West of Ashland.

We’re all musicians here at Chicago Music Exchange and we want you to love the gear you get from us. We understand that sometimes you get a piece of gear that doesn’t work out for you. That’s why we offer an easy return policy to take the stress out of purchasing from us.

If you decide you'd like to return an item, please contact your Sales Rep, chat us, or give us a call.

If you placed your order on Amazon or eBay, we advise issuing the return request from your account on the platform of purchase - our Customer Service team will process a refund upon receipt of the item(s).

Most new items may be returned within 30 days of delivery and most vintage & used items may be returned within 3 days of delivery for a full refund, exchange, or store credit. Please pack the product safely for the journey back to us. If the product was shipped for free, the charge will be deducted from refund, unless the reason for the return is outside normal circumstances.

Please contact us as soon as possible if your order was received incorrectly, damaged, or defective. Most times we will give you an RA number (Return Authorization). Why is that number important? This will allow us to speed up the process of the return.

We reserve the right to charge a restocking fee based on the return condition. Some items we just can’t take back for returns, due to a one time function like strings or drums heads and other times it’s not sanitary to do so with microphones or harmonicas. If you aren’t sure if what you bought falls into a category like this, call us (773) 525-7773!

We strive to get your return processed quickly. Most of the time we have it done within two business days. Funds going back to credit cards usually takes two to four business days. CME strives to make sure all customers are happy with their experience. It is our priority to provide great service along with great gear. We always want to be helpful, and open to your feedback. Please let us know your thoughts! If you have any questions, we’re here for you!

Feel free to email us at or give us a call at (773) 525-7773.