The API 527 takes it's place alongside the family of API VCA based compressors, the 225L and the 2500 Stereo Bus Compressor. Anyone familiar with those units will immediately be at home with the 527. Features common to the line like "feed forward" (NEW) and "feed back" (OLD) gain reduction methods selectable on the front panel, provide a choice of "that old way", or "the new way" of compression, for the highest level of flexibility in signal gain control. The "old way" or Feed-Back method is what most of the classic compressors used for the gain control circuit. The "new way" gain reduction is more typical of the newer VCA type compressors that rely on RMS detectors for the gain control voltage.
There is a "SOFT"/"HARD" switch for an "over-easy" type compression resulting in a very natural, uncompressed sound or a typical sharp knee type that lends itself to a much more severe limiting effect.
The Threshold control sets the initial operating parameter. The 527 can be operated with signal input levels from +10 dBu to -20 dBu.
The 527 features an Output fader control that ranges from minus infinity to +10dB, and output capability is +28 dBu through our 2520 discrete amplifier and a large API output transformer. The output level remains fairly constant regardless of the threshold or ratio control, much like the "more/less" Ceiling control on the API 525 compressor. This allows for live adjustments without any noticeable gain changes in the program level.
The patented THRUST function can be switched in and out via the front panel as well, applying a high pass filter before the RMS detector circuit that preserves that punchy bottom end.
Attack and Release are fully adjustable on the 527. Release time can be adjusted by rotating the inner concentric RELEASE knob. Release time constants: .3 sec to 3 sec. Attack time is adjusted on the outer concentric ATTACK knob, which ranges from 1 millisecond to 25 milliseconds.
The 527 is designed for individual channel use or, through the use of the LINK switch, two units can be combined for Stereo applications via a motherboard bus connection.
The 527 Compressor/Limiter makes use of the 2510 and 2520 Discrete Op-amps and exhibits the reliability, long life, and signature sound which are characteristic of API products.
- Audio circuit uses the 2510 and 2520 Discrete Op Amps with transformer output
- Continuously variable detented Threshold control
- Continuously variable detented Attack and Release controls
- Continuously variable detented Ratio control
- Output Fader level control
- 10 segment VU/Gain Reduction meter with selector switch
- Overload LED
- "Link" switch for multiple unit interdependent compression linking
- "New"/"Old" switch for feed-forward or feed-back compression
- "Hard"/"Soft" compression curve knee switch
- Patented THRUST® switch for frequency dependent side chain control
- "IN" switch with hard relay bypass when in the "Out" position
All prices on our website include 23% Portuguese VAT and are also displayed VAT free. If you’re buying from outside of Portugal and have a VAT registered business within the EU, you can buy directly on our store without VAT. Just add the product to your cart and go to the checkout page and there will be an option for you to enter and validate your VAT ID. If it's accepted through our system your order will be completed and fulfilled without VAT. Please note, if you use an express checkout or buy it now button the option to buy without VAT isn't available, you need to add the product to cart first and use the standard checkout procedure.
We can ship worldwide but our online store is configured to only handle orders to Europe (Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Liechtenstein, Luxembourg, Malta, Netherlands, Norway, Poland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom). If you want us to ship to a country outside this list just get and touch with us so we can quote you and let you know how much it would be to fulfil such order.
We have access to all the products of the brands we represent, however not all of them are listed. Please get in touch and let us know what you’re looking for, we can pretty much guarantee the best price in Europe.
We use UPS so you can expect 1 - 3 business days to get it after we ship (1-2 days if we’re shipping to continental Portugal). If the item you bought is in stock, we usually ship the same day (for orders placed until 11AM) or the next day at the latest. If we’re out of stock, we can usually get the products in 2-5 working days. Please get in touch if you have a specific deadline you have to meet before ordering. In some cases we can ship a demo unit to get you to work if the manufacturer has a longer lead time.
Bank transfer is preferred, but we take all major credit cards, PayPal, or cash if you’re picking up the gear at our shop. We don’t accept debit cards or checks at the moment.
If you’re looking for financing for your purchase get in touch as we might be able to help you with that.
According to EU law, we accept returns for all the products purchased through our online store during the next 14 days after receiving the goods, provided that the packaging is in it’s original condition. If this is not the case, we reserve the right to refuse the return or charge a re-stocking fee.
All returns need to be pre-approved by us and must be complete including accessories and documentation with original packaging.
You are responsible for return shipping costs including shipping insurance which is recommended to protect your items, as you are liable for items damaged during return shipment. Additionally, if you received free shipping on the order when we fulfilled it, we will be deducting the value of this shipping cost from your refund/discount.
We do not accept returns of the following goods: (1) Software and computers; (2) All custom or special order items; (3) Magnetic tape or other recording medium; (4) Personal use items, such as headphones or windscreens; (5) Studio furniture, racks and chairs.
After inspection of the returned goods, and providing that they meet the conditions stated above, we will issue a refund or give you credit for another purchase.
Everything we sell is covered by the manufacture's warranty, which is a least 1 year. Special conditions may apply.
Yes, we do. Please contact us to know if the software you’re looking for has an Education licence available.
We don’t through this website, but please check our Reverb store. There you can find B-Stock and Ex-Demo gear, as well as other stuff (used and new) from brands we don’t usually represent.
At Arda we try to work with only the best brands in the business, because we know how important is reliability in a professional environment. That being said, sometimes shit happens. If you run into some issue with anything you bought from us, please get in touch and we’ll try our best to take care of it ASAP. We might even be able to provide you with some sort of replacement gear in order to minimize downtime.