API 500-6B Lunchbox

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$499.99 to $699.00 Price Tier: High-end

4.5 (9)

1 Critic Review

Find out who is using API 500-6B

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2 wishlisted

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Page last updated Jun 11, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 7, 2026.

Store

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Price

5.0 (10)

$699.00

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5.0 (3)

$499.99 4 available Used

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5.0 (3)

$699.00

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Average Price: $633

High-end/Boutique

$100

$501+

Price Tier

In the Effects Processors category, API 500-6B Lunchbox is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

Price History

Based on price data from 2 merchants for "API 500-6B Lunchbox". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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The API 500-6B Lunchbox is your ticket to building a custom audio experience that suits your unique sound needs. This 6-slot chassis is perfect for housing up to six API standard-format modules, allowing you to mix and match preamps, EQs, and compressors to create a personalized rig. Whether you're crafting beats in a cozy home studio or laying down tracks in a professional setting, this lunchbox has you covered.

Engineered with a rugged steel chassis, the API 500-6B is as durable as it is versatile. Its built-in 48-volt internal phantom power supply and self-powered design mean you can rely on it without worry, whether in the studio or on the road. With rubber feet and a sturdy carrying handle, portability is a breeze, making it perfect for remote recording sessions.

The API 500-6B also features DB-25 connectors for seamless input and output connections, and power rail LED indicators to keep you informed and in control. It's an indispensable tool for musicians and audio engineers who demand quality and flexibility.

Key Features:

Holds 6 API standard modules
215mA 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
Self-powered, 100 to 250 Volts switchable, 47 to 63Hz
Rubber feet & carrying handle for portability
Rugged steel chassis
Ideal for remote recording of vocals and instruments

Product specs

Number of Slots	6
Inputs	8 x XLR, 1 x DB-25
Outputs	8 x XLR, 1 x DB-25

FAQs

How many modules can the API 500-6B Lunchbox accommodate?: The API 500-6B Lunchbox can accommodate up to six API standard-format modules, allowing you to build a custom rig with preamps, EQs, and compressors.
What type of power supply does the API 500-6B Lunchbox use?: The API 500-6B Lunchbox features an internal power supply with a +48 volt phantom power option, making it suitable for modules that require phantom power.
What connectivity options does the API 500-6B Lunchbox offer?: The API 500-6B Lunchbox offers 8 XLR inputs and 8 XLR outputs, as well as a DB-25 connector for additional connectivity.
Is the API 500-6B Lunchbox compatible with non-API 500 series modules?: Yes, the API 500-6B Lunchbox is designed to be compatible with any standard 500 series modules, not just those made by API.
Does the API 500-6B Lunchbox include any modules?: No, the API 500-6B Lunchbox is a chassis only and does not include any modules. It is designed for users to install their own choice of 500 series modules.

Videos

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Red Dog Music

The API Model 500 series lunchbox - API module overview

Red Dog Music

API Lunchbox - Sweetwater NAMM 2011

Sweetwater

API-500-System: Lunchboxen im Vergleich! - Workshop/Tutorial (The Soundphile)

The Soundphile

Reviews

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PROS

Offers versatility with options for preamps, EQs, and compressors
Durable build, described as a "tank"
Enhances sonic landscape in recordings
Portable design allows for creative recording locations
Made in the USA, assuring quality craftsmanship
Easy to integrate and swap out 500 series units
Provides cost-effective solutions without sacrificing sound quality

CONS

Initial investment may be high for full customization

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about API 500-6B Lunchbox.

Comparisons

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Owners compare the Classic Audio Products of Illinois VP28 favorably to the API 512c, noting the VP28's superior sound quality at a lower price point.
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Features and functionality

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The API 512c lacks an output attenuator, making it challenging to achieve optimal sound without peaking converters.
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The API 500-6B Lunchbox's power supply has been criticized for performance issues, affecting overall user satisfaction.
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It's noted that inserting a module upside down might not cause damage due to output transformers preventing DC passage, but correct orientation is crucial.
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The API 500-6B Lunchbox's newer power supply (post-2007) is called the wire-toroid, aimed to handle power demands better, but noise issues may persist even with newer units.
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Mods and upgrades

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For API-style preamps, users suggest assembling CAPI VP26 kits for cost savings, with some reporting a $300+ price difference compared to pre-assembled units.
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User experience

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Some users report dissatisfaction with API's tech support, citing issues with diagnosing and repairing module problems.
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Some users report experiencing intermittent white noise and crackling in the API 500-6B Lunchbox, suggesting potential power supply or chassis ground issues.
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Owners express concern over high repair costs, with API's labor fees running around $110 per hour plus parts, deterring many from seeking professional repair.
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Use cases and applications

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The Standard Audio Level-Or module is recommended for aggressive drum sounds when integrated into a drum mix.
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Owners mention the necessity of hearing a "click" when inserting modules like the WA12 to confirm proper installation, crucial for studio setup reliability.
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Setup and maintenance

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Users have reported issues with proper pin connection when inserting modules; ensuring the pins properly connect is essential to avoid power problems.
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It's important to check the serial number to determine if the unit has the updated power supply; serial numbers 501.2352 and higher have the newer power transformer.
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Testing the unit in different locations may help identify if the noise issue is related to power instability at the current setup.
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Critic Reviews

Review: API 500 Series Lunchbox — AudioTechnology

audiotechnology.com

A compact powerhouse, the API 500-6B Lunchbox shines with its all-American audio quality, offering versatility and precision ideal for punchy drums, guitars, and vocals. While its mic pres might be too 'hard' for softer sounds, the unit impresses with its sonic pedigree, user-friendly interface, and robust build. A standout choice for those craving classic audio tools in a portable format, despite its hefty weight.

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Full Review

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4.5 out of 5

Based on 0 Reviews and 9 Ratings

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