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API Dual EQ with Selectable Boost Cut

The API 5500 dual-channel equalizer, like everything in APIs rackmount and module product lines, can be traced directly to its roots in the late 60s when API founder Saul Walker introduced his ground-breaking modular console component designs. In this case, the 5500 owes its existence to the original single-channel three-band API 550 EQ, as well as successive 550A and 550B (four-band) modules.

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SKU: 287287
$3,699.00
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The API 5500 dual-channel equalizer, like everything in APIs rackmount and module product lines, can be traced directly to its roots in the late 60s when API founder Saul Walker introduced his ground-breaking modular console component designs. In this case, the 5500 owes its existence to the original single-channel three-band API 550 EQ, as well as successive 550A and 550B (four-band) modules.

At a time when most equalizers could be called broad, ham-fisted tools, Walker created an equalizer with thoughtful and creative innovations such as proportional-Q, which varies bandwidth in proportion to filter amplitude, and 100-percent reciprocal boost and cut behavior. Extending the 550 lineage, the new API 5500 ($2,995) remains true to the original 550 signal path design, while adding some creative new features.

Features

The API 5500 is essentially two 550B four-band EQ modules configured in a single-space rackmount chassis with an internal power supply.

Like the individual 550 modules and, in fact, all API analog products the 5500 is a fully discrete-component device with no integrated circuits in its audio pathways. Per-channel signal gain is provided courtesy of two of the legendary, hand-built 2520 operational amplifiers. An API 2510 op amp handles the 5500s electronically balanced input section, and the API 2503 output transformer is capable of delivering up to +30 dBm at the output before clipping. A field-upgradeable transformer-coupled input section that bypasses the stock input section is available as an option.

Each channel features four bands of EQ with peaking-type filters for the inner pair and peak/shelf-switchable filters for the two outer bands. Filter frequency centers per band are as follows: Low 30, 40, 50, 100, 200, 300, 400 Hz; Low-Mid 75, 150, 180, 240, 500, 700, 1000 Hz; Mid-High .8, 1.5, 3, 5, 8, 10, 12.5 kHz; High 2.5, 5, 7, 10, 12.5, 15, 20 kHz. Each EQ band is capable of a +/- 12 dB amplitude range though the overall range of each channels filters can be reduced to .5 or .25 of the normal range via two rotary switches.

In addition to an EQ section In/Out button for each channel, the 5500 also features a global straight-wire bypass with no electronics in line.

I/O connections are XLR with additional balanced/unbalanced 1/4-inch input jacks that override the XLR inputs. The unit can be switched for 115- or 230-volt operation, has a replaceable fuse, and connects to A/C outlets via a standard IEC cable.
Brand API
Model 5500-API
Custom Stock Status Qty Rule N/A
Size N/A
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