







APSI 559 (Pair)
(Used)
From Avedis site: 9 band Graphic EQ, -12 dB cut, +15dB boost, Unbalanced Input w/ API 2520 Opamps.
Manufactered by APSI (Audio Processing Systems, Inc.) and distributed by API (then called Automated Processes Inc.). Unlike the 560, the 559 had an unbalanced input. The filter amps used IC’s, but had it’s own potted output stage discrete amplifier and an output transformer. The boost/cut sliders were actually mechanically stepped level switch with the numerical reading on the front. The bandwidth, or Q, was tighter than the 560, giving it a more “notch-ey” sound. Like all the other API eq’s, it has good noise and headroom specifications that holds well with 600 ohm loads
Condition: Good for their age
Price is for the pair. Screws in place to hold the front panel on, will need removing before installing in a rack. We’d suggest only installing in an API branded rack to avoid any conflict with modern rack features.
M03997
FAQs
What warranty do you offer?
Used equipment: 3 month warranty from Make Noise Pro Audio. On some occasions the original factory warranty may also remain (please see their respective websites for more information)..
B-Stock equipment: 3 month manufacturer warranty through Make Noise Pro Audio.
New equipment: Minimum 1 year manufacturer's warranty. Some manufacturers may also extend this (please see their respective websites for more information).
Do you charge VAT?
Yes and No. Items with VAT will clearly show "inc VAT”. Those without will show "no VAT"
Why is this? It’s all very dull but to put it simply; if we buy the items from a VAT registered seller, we sell with VAT included. If we buy from a private seller (non VAT registered) we do not charge VAT on those items.
For international buyers - only items with VAT included will be eligible for the 20% to be removed.
How soon will my order be shipped?
Unless specifically stated, all items are in stock for immediate despatch. If you order before 2pm GMT/BST then your order will be sent out for next day delivery. Orders after 2pm GMT/BST will be sent out the following day and you’ll receive them the day after that.
Used & B-Stock Gear: All used and b-stock gear is tested and ready to go!
New Gear: The product page will display if an item is in stock. If it is marked as pre-order, you can place your order as normal and await its arrival into stock. Please get in touch for an estimated shipping date . This may vary depending on stocking level with the manufacturer and/or distributor.
If you have any time critical requirements please get in touch ASAP to ensure we can execute accordingly.
Can I test the equipment before I buy it?
We have a demo room at MNPA HQ where you are welcome to come and try out the equipment we have in stock. We’re not a shop and open to the general public so please get in touch via our Contact Form to book an appointment before coming to see us.
I can’t find the item I want
We have a lot of items through our doors on a weekly basis, but if we don’t have what you’re looking for then please check out our FIND ME GEAR page so we can help track it down for you.
Do you ship internationally?
We ship worldwide via a range of couriers - DPD, Fedex, DHL and TNT - depending on the destination. We don’t currently fully support international checkouts through our website due to the vast differences in shipping costs from one country to another. Please get in touch if you wish to place an international order and your country is not listed on the delivery page.
Please note, VAT is no longer charged on orders to the EU but the BUYER is responsible for paying any import taxes and fees once the goods arrive in your country. We will not declare lower values to refuse these fees.