API Audio 5500 Dual Equalizer
Parametric Equalizers
$3,702€3,325Check ↗
Brand profile · USA, est. 1968
API Audio
API Audio, originally Automated Processes, Inc., has long been a cornerstone of professional audio recording, renowned for its robust, sonically distinctive equipment. Their designs, initially focused on broadcast consoles, evolved into highly sought-after studio processors and preamps, prized for their character and reliability. API’s gear is synonymous with a warm, punchy, and authoritative sound that has graced countless hit records.
1604 Console Legacy312 Preamp2500 Stereo Compressor550A EQSignature 'API Sound'
1968founded
USAcountry
27products in stock
$24–$24kprice range
API Audio in the charts
Every chart where API Audio has five or more models — ranked by the AudioFu Index inside each.
All 27 API Audio products
Sorted by AudioFu Index — the strongest models of every category first.
API Audio 560 Graphic EQ
Graphic Equalizers
$1,168€1,049Check ↗
API Audio 3124MV
Preamps
$4,826€4,335Check ↗
API Audio 3124V
Preamps
$4,096€3,679Check ↗
API Audio 3122V
Preamps
$2,771€2,489Check ↗
API Audio TranZformer GTR
Equalizer Pedals
$400€359Check ↗
API Audio TranZformer LLX Bass Pedal
Equalizer Pedals
$400€359Check ↗
API Audio 500VPR
500 Series Components
$1,214€1,090Check ↗
API Audio 525 Discrete Compressor
500 Series Components
$1,335€1,199Check ↗
API Audio 512v Preamp
500 Series Components
$1,279€1,149Check ↗
API Audio ASM164
Summing Mixer
$4,341€3,899Check ↗
API Audio TCS II Channel Strip
Preamps
$4,229€3,799Check ↗
API Audio MC531 Monitor Controller
Studio Monitor Controllers
$3,105€2,789Check ↗
API Audio 527A Compressor Limiter
500 Series Components
$1,391€1,249Check ↗
API Audio TranZformer CMP
Compressor Pedals
$400€359Check ↗
API Audio 500-8P Lunchbox
500 Series Components
$890€799Check ↗
API Audio The Box II
Analogue Mixing Desks
$23,591€21,190Check ↗
API Audio 2500+
Compressors, Gates and De-essers
$3,873€3,479Check ↗
API Audio 525A
500 Series Components
$1,435€1,289Check ↗
API Audio Select SV14 4-Band EQ
500 Series Components
$834€749Check ↗
API Audio 312 Mic Pre
500 Series Components
$1,001€899Check ↗
API Audio 565 Filter Bank
500 Series Components
$865€777Check ↗
API Audio Blank Panel 500er 5B1
500 Series Components
$24€22Check ↗
API Audio 550b Discrete 4 Band EQ
500 Series Components
$1,502€1,349Check ↗
API Audio 550A Discrete 3 Band EQ
500 Series Components
$1,402€1,259Check ↗
API Audio 512c Mic Pre
500 Series Components
$1,112€999Check ↗
API Audio 505 Di Direct Input
500 Series Components
$865€777Check ↗
API Audio, honestly
What API Audio does well
- Exceptional build quality and reliability
- Distinctive, warm and powerful sonic signature
- Highly versatile across various genres
- Industry-standard for a reason
- Offers a unique character for tracking and mixing
What to watch for
- Premium-priced, investment required
- Can be perceived as 'colored' by some engineers
- Larger format rack units
- Limited range compared to some competitors
- Steeper learning curve for optimal usage
Questions about API Audio
Where are API Audio instruments made?
API Audio products are primarily manufactured in their Wixom, Michigan facility, maintaining a commitment to American craftsmanship and quality control.
Are API preamps suitable for vocal recording?
Absolutely; API preamps are widely used for vocal recording, providing a rich, full sound with excellent transient response and a pleasing warmth.
How does the API 2500 compare to other stereo compressors?
The 2500 offers a unique blend of VCA and optical compression, delivering a signature 'glue' effect and a powerful, controlled dynamic range that sets it apart from more transparent or aggressive alternatives.