API Audio 235L 200 series Noise Gate / Expander  From API

Discrete Channel Noise Gate

API Audio

$660.25

Retail:  $695.00

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Manufacturer's Description from API

Features

  • Threshold control from -45 to +25 dBu
  • Variable Fine Adjustable Depth to -80 dB
  • Adjustable Release/Hold Time, 50mS to 3 sec
  • 2:1 Expander or Noise Gate Selection
  • Release or Hold Switch for Release control knob
  • Always at Unity Gain, Regardless of settings
  • LED Gain Reduction Meter
  • Uses the API 2510 and API 2520 Op-Amps
  • Transformer Output, to +28 dBu

The API 235L Noise Gate/Expander has the ability to reduce noise in any type of program. The 235L can open unusually fast, without losing any part of the sound. Its extreme flexibility, repeatable settings, and superb sound make it ideal for all studio, live sound, and broadcast applications.

The 235L is one of the fastest noise gates manufactured today. When an engineer is faced with program material with a high level of background noise, the 235L can either Gate the signal at a preset Threshold, or with the use of the Expander function, can reduce the background noise to an almost undetectable level. This can be achieved without the typical loss of the program material caused by slow triggering of the signal, or "pinging" caused by false triggering.

With a wide range of adjustment, the 235L can operate from -45 to +25 dBu, fitting into any audio situation regardless of program level. Once the Threshold level is set, the Attack time can be selected to react faster than 100uS or slightly slower than 25mS to reduce false triggering. Although the Depth control has a full range of -80 dB, the scale is expanded in the first half of rotation so 0 to 9 dB is available for fine tuning of subtle, undetectable gating. The second half of rotation is from 10 to 80 dB for more drastic noise reduction.

The Expander function uses a 1:2 ratio, allowing the signal to "sneak up" to the full signal level without any loss of "under threshold" vocal or percussion nuances. Setting the threshold in the Gate function to the desired level, then switching to the Expander mode is the perfect setup.

For special gating functions such as the famed "gated snare reverb", the Release function can be switched to Hold, and the Release control becomes the Hold time. In both scenarios, the unselected function has a set time of 100mS.

When used with the other 200L series modules, a complete input strip can be built from input through dynamics, equalization, and final output.

The 235L makes use of the 2510 and 2520 op-amps and therefore exhibits the reliability, long life, and uniformity which are characteristic of all API products.

API Audio

About Manufacturer

API (Automated Processes, Inc.) is world famous for its all-discrete audio products: studio and broadcast mixing consoles, and a full line of rack mount mic preamps, equalizers and processors. It all began with a dream. It was 1968. The company: Automated Processes Inc., formed by men with a vision. Best known for their now legendary "2520 amplifier", this unique amp has been and will continue to be the heart of all API discrete products. It continues to provide reliability and sonic purity unmatched by the competition. The resulting console met the needs of the music, commercial and broadcast industry. API became the leading audio broadcast console manufacturer for radio and television networks and high profile stations. In addition, recording studios, large and small, began using API.....and receiving rave reviews from engineers and producers. There are over 700 API consoles across the nation and around the world, including the three major networks. Over thirty years later, many of these consoles are still in daily use in some of the most prestigious recording and broadcast facilities in the world because, to date, there are few, if any consoles of equal sound quality at a cost-effective price.

Specifications

Specifications

Threshold Range:

-45 dBu to +25 dBu

Depth Range:

0 to -80 dB, Fine adjust control, -9 at 50% rotation

Attack Time:

Fast = 100 u/S, Normal = 25 mS gate at 90% open

Release Time/Hold Time:

50 mS to 3 sec.

Input Impedance:

>10 K Ohms, Un-Balanced

Output Impedance:

85 Ohms, Transformer coupled, Balanced

Nominal Levels:

-45 dBu to +20 dBu

Clipping Level:

+28 dBu

Frequency Response:

0, -.3, 30 to 20 kHz

Noise:

Gate Closed: -102 dBu, Unweighted

Gate Open: -90 dBu Unweighted

Distortion:

Gate Open:

-40 dBu=.3%THD, -30=.1%, -20=.03%,

 

-10=.01%, +4=.008%, +12=.01%, +28=.1%

Connectors:

.100 spaced ELCO

Power Consumption:

±16 VDC, 100 mA max @ +24 dBu

Size:

1.25" X 2.65" X 6.5" Deep

Size (Boxed for Shipping):

4.5" X 6.25" X 10"

Actual Weight:

.61 lb.

Shipping Weight:

.98 lb.

Downloads

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set up sheet

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