

API 6-Slot Lunchbox
The API 500-6B lunchbox is a 6-slot rack designed to accept all API standard 5.25" x 1.5" modules. This quality allows an engineer the flexibility to bring along specialised EQ effects to any situation: 550A, 550b or 560. The lunchbox has an internal power supply with a rear panel selected AC voltage switch and a removable power cord. The input/output jacks are XLR. The lunchbox comes standard with a +48 volt internal phantom power supply, bussed to pin 15 for interface with the API 512c Mic Preamplifier.
API makes several modules for the 500-6B, including the 512c Mic Preamplifier, the 525 Compressor, the 527 Compressor, the 550A 3-band EQ, the 550b 4-band EQ and the 560 Graphic EQ. Combinations of these modules make perfect stereo recording packages (two 512cs and two 550bs) or vocalist’s box (one 512c, two EQs and one 527).
NOTE: The older 560A equaliser may use pin 15 for a "direct output" and must be disabled on the 560A circuit board edge connector by cutting a trace. This will eliminate 48 volts from damaging the 560A series equalisers.
- Holds 6 API standard modules
- Optional Rack Ears available for rack mounting
- 6 Slots with 250 mA of current per slot
- DB-25 connectors for easy input and output connection
- XLRs to access channels 7 and 8 of the multipins
- Power rail LED indication
- Internal power supply; 100 to 250 Volts switchable, 47 to 63 Hz
- Rubber feet & carrying handle for portability
- Rugged steel chassis
- Perfect for remote recording of vocalist and instruments
Product Overview
Product Specifications
Product Videos
Shipping Information
We provide free shipping on most items and Next Day delivery on all orders completed before 12pm (noon!) so you don’t have to pay extra or wait long to start enjoying your new equipment.
We use DPD to ship the majority of our orders within the UK. International locations will vary, learn more here.
Product Support
We work with some of the world’s leading audio manufacturers to provide everything from the trusted studio classics to modern, innovative technologies that help you to push sonic boundaries. We pride ourselves on offering the best support both before and after sale. If you have any questions, please get in touch.

API 6-Slot Lunchbox
New Gear FAQs
Are all new items in stock?
With such a wide range of products we cant stock everything at all times.
The product page will display if an item is in stock. If it is marked as pre-order, you can place your order as normal and await its arrival into stock.
Please get in touch for an estimated shipping date. This may vary depending on stocking level with the manufacturer and/or distributor.
What warranty do you get with new gear?
Minimum 1 year manufacturer's warranty. Some manufacturers may also extend this (please see their respective websites for more information).
Can I part exchange used gear towards new gear?
Of course! Whether youre just looking to sell unused gear or looking to upgrade, get in touch here to discuss.
Can I test the equipment before I buy it?
We have a demo room at MNPA HQ where you are welcome to come and try out the equipment we have in stock. We’re not a shop and open to the general public so please get in touch via our Contact Form to book an appointment before coming to see us.
