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Behringer Spring Reverberation Unit Type 646

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Product Information

We’ve brought back a legend so you can let your tone spring to life! Give your music that extra twang and sense of space with the Behringer SPRING REVERBERATION 646 – a legendary spring reverb in a compact and portable Eurorack format!


A Legendary Recreation

Emulating our heroes is one of the many things we can have fun with as musicians which is why we wanted the SPRING REVERBERATION 646 to be as faithful as possible to the original Grampian Type 636 used by Pete Townshend and legendary reggae dub master Lee “Scratch” Perry. Now you can have their legendary secret ingredient added to your setup so you can create your very own masterpiece, or to just have fun with.

Pure and Simple

The 646 is a no-nonsense reverb unit. No digital emulation here. Inside, you’ll find dual mechanical springs that provide that lush and dynamic reverb sound that no other reverb type can match. And if you bump the 646 it can even do that iconic spring reverb “sproing.” Just be gentle with it. 

Super Versatile

We built the 646 to be as versatile as possible so you can use it with any instrument you want! The 646 accepts balanced and unbalanced mic inputs where you can control the input level with the Mic Channel knob as well as high- and low-level line inputs such as keyboards or guitars. The integrated overload circuit can even give you a warm analog overdrive before the signal gets passed to the reverb. 



  • Balanced Microphone x 2
    • Impedance: 25 Ω
    • Sensitivity: 20 μv
  • Unbalanced Microphone x 2
    • Impedance: 25 Ω
    • Sensitivity: 20 μv
  • High Level Auxilliary x 2
    • Impedance: 1 MΩ
    • Sensitivity: 500 mv
  • Low Level Auxilliary x 2
    • Impedance: 50 kΩ
    • Sensitivity: 10 mv


  • Unbalanced line level x 2


  • Switches
    • Power (top panel)
  • Knobs
    • Reverberate
    • Aux Channel
    • Mic Channel
  • Sockets
    • Mute Footswitch x 2


  • Frequency Response: ±2 dB 35 Hz - 20 kHz
  • Reverberation Delay: 29 - 37 ms nominal
  • Reverberation Time: 2 seconds at 300 Hz
  • Reverberation Response: ±3 dB 100 Hz - 6 kHz
  • Size: 37.37 x 13.56 x 8.64 cm (14.71 x 5.34 x 3.40")
  • 72 hp when in Eurorack
  • Weight: 1.58 kg (3.48 lb)
  • Consumption: 1000 mA 12 V DC


3 Years Warranty

Shipping & Delivery

All orders over $100 will be automatically eligible for FREE Shipping Australia Wide, if you order is under $100 there will be a flat rate of $10.

Belfield Music is well known for its top online customer service. We treat all online customers with the same excellent service we give to our in store customer. We will ensure that you receive all the support you need while your goods are in transit and ensure the goods arrive promptly. All of our shipments have tracking numbers available and we cover every single unit by our own shipping insurance.     

Online orders are normally processed within 1-3 business days. Once processed, your order should take between 1-8 business days to arrive depending on your location. Please note that your order may take up to 10 business days to arrive from the day you place your order. 

If it transpires that the product is out of stock due to a stock discrepancy and/or there will be a delay in shipment, we will contact you within 2 business days of placing your order and give you the option of waiting or cancelling your order. The products we advertise online should show if they are in stock or not. We do our best to keep the website stock count up to date, but there may be an occasional error.

If you wish to utilize an Express Delivery Service to receive your item, please contact us for a shipping quote before you place your order at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.           

Deliver is made during the hours from 8:00am till 5:30pm Monday to Friday. As such, please ensure you nominate an address which is capable of receiving goods during 8am and 5.30pm.  Given the restrictions on PO Box deliveries we cannot deliver larger sized items to a PO Box.

If for any reason our selected carriers don't service your area we will contact you before processing your order if this applys to you.

Returns Policy

If you wish to return an item which is not damaged or faulty in any way and you have simply changed your mind or made the wrong decision, you must let us know within 7 days of receiving the item.  We will not agree to refund an item because you simply changed your mind or made the wrong decision if we have not been advised of your intention within 7 days of receiving your item. Once we have provided a return authority, it is the buyer’s responsibility to return the item, at their own costs within 30 days from original purchase. If the item is returned with any damage or alteration to its original packaging, we will refund the item subject to applying a minimum 15% restocking fee.  We will not refund the costs of the initial shipping charges.

It is in Belfield Music best interests to keep our customers happy with their purchases. If you are not happy with your purchase, please talk to us first. We will always attempt to resolve any problems you may have as best we can. To contact us please email us at admin@belfieldmusic.com.au or by using the Chat icon on the bottom right of the page.