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Everything In Music - Since 1958
Everything In Music - Since 1958

API 235L Discrete Channel Noise Gate / Expander

Original price $660.25 - Original price $660.25
Original price
$660.25
$660.25 - $660.25
Current price $660.25
Inventory Status:

❓ Out of stock
About Inventory Status


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In stock: It is in stock and available to ship or pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions


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Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.


Reduce Noise Fast With the API 235L Discrete Channel Noise Gate / Expander

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.


  • 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


Delivering Noise Reduction As Fast As Can Be

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.


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 s
  • Input Impedance: greater than 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
    • 0.3% THD: -40 dBu
    • 0.1% THD: -30 dBu
    • 0.03% THD: -20 dBu
    • 0.01% THD: -10 dBu
    • 0.008% THD: +4 dBu
    • 0.01% THD: +12 dBu
    • 0.1% THD: +28 dBu
  • Connectors: .100 spaced ELCO
  • Power Consumption: ±16 VDC, 100 mA max @ +24 dBu
  • Size (W x H x D): 1.25 x 2.65 x 6.5 inches / 32 x 67 x 165 mm
  • Shipping Size (W x H x D): 4.5 x 6.25 x 10 inches / 114 x 159 x 254 mm
  • Actual Weight: 0.61 lb / 277 g
  • Shipping Weight: 0.98 lb / 445 g

Manufacturer: Automated Processes Inc
Model: 235L
SKU: I384062-N-0-WHXA


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