AMT Electronics SS-20 Tube Preamp

by AMT Electronics

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  • AMT Electronics SS-20 Tube Preamp

    Quickly becoming a legend known worldwide for it’s AMAZING heavy metal style tube distortion. Brother to the SS-11 preamp, but the SS-20 was designed based on tigher, crunchier, more aggressive styles of guitar playing. Incredible Clean, Overdrive, Distortion, and Lead tones in a compact tube valve driven pedal. We are raising the bar and technology in modern day pedal design and offer affordable high end guitar tone pedals. This one is going to be finding its way onto lots of pedalboards! Our principle and motto for this device is it is the valve that sounds and sings, however, the transistors do their best to help it sound in all its beauty and originality. Next best option to buying an expensive amp head!

    • High-grade high-voltage feed of triodes.
    • Complete elimination of operational amplifiers traditionally used in hybrid preamps for sound amplification and processing.

    Application of special semi-conductor amplifiers modeling triode-based harmonics and providing signal amplitude necessary for high-grade valve operation.

    In order to achieve the full opening of input valve cascades working in the “hottest” conditions the giant amplitude of one hundred and more volts is necessary. The dynamic properties characteristic to valve based preamps are implemented in SS-20 due to the elimination of signal limiting OA (feed level of 20-25V) in the part of preliminary amplification and using special cascades capable of reaching 250V amplitude with nonlinearity similar to 12AX7 triode. Thus, we managed to achieve full dynamic characteristics of guitar signal without usual hybrid “squeeze” as well as assign special sound character to SS-20.

    Special attention was also paid to clean channel in this section we also followed the way of preserving the dynamics of guitar signal with simultaneous formation of soft “nonlinearity” inherent in the cascades on vacuum triodes. It also allowed us to escape both the “squeeze” and “refinement” peculiar to many clean-channels of hybrid devices.

    The Architecture of SS-20:

    • Two high-grade channels CLEAN and DRIVE with the possibility of Drive-channel operation in two basic modes: moderate sensitivity (CRUNCH) and high sensitivity (LEAD).
    • Effects Loop Send and Return.
    • Operation via both direct unaltered signal for guitar amplifiers heads, combos, and speakers (OUTPUT jack) as well as speaker cabinet compensated output for mixing consoles, computers, or other recording devices.

    The basis of the inner preamp structure is the principle of maximum use of amplification and nonlinear transformation of the valve part of the device. Thus, the semi-conductor part of the hybrid practically does not participate in the sound limitation (except for the use of preamp in LEAD mode at Gain LEAD level of higher than 7) and the entire spectrum is formed by the valve preamp part. In the preamp stage the quantity of semi-conductor cascades is not used in the sound processing, and in the absence of jacks in SEND and RETURN the signal is forwarded to OUTPUT through compensating circuits directly from the output triode cascade. Therefore it is advised to use high quality minimum length cables for connecting the preamp input with guitar.

    The SS-20 uses the original cabinet emulator, however, ONLY in direct out mode! It models the amplitude-frequency characteristics of guitar amplification systems for the most accurate reproduction and ease of recording direct. Secondly, it simulates own nonlinearity of dynamic head peculiar to instrumental loudspeakers, that in its turn colors the output signal with short-range harmonics making it live and closer to real. Our unique speaker emulator circuitry supplements the signal with 2nd and 3rd harmonic with smooth increase in their level at signal level growth (it actually is similar to instrumental head in the closed cabinet), not found on other manufacturers pedals.

    AMT Electronics SS-20 Tube Preamp Features:

    • Power: External Adaptor AC 120V-240V 12V DC 1.25A
    • Tubes: 1 x 12AX7 – 12.6V (6.3V)
    • Anode Voltage: DC 290V

    Outputs/Inputs

    • Amplifier Output – for Combo Connection
    • Mixer Output – for Mixer/Recorder Connection
    • Effects Loop Send and Return
    • Input In

    Footswitches

    • Left F Switch – DRIVE effect on/off
    • Right F Switch – DISTORTION effect on/off
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    Pre-Order Shipping: 

    Pre-Orders typically ship with 2 weeks. In the event a product is backordered we will contact you with an exact shipping timeframe. 

    Smaller items will ship USPS First Class. 

    What if my package gets lost in transit?
    Though we successfully ship thousands of packages a year, sometimes shipments don't always go as planned. In the event your package is lost in transit, please email sales@prymaxe.com explaining the situation. We will open a case with the shipping company to try to locate your package. If 30 business days have passed (90 business days for international customers) and your package is still lost, we will issue you a Prymaxe Digital Gift Card for the original purchase price.

    USA shipping only for Barber Electronics, Boss, Darkglass, Dunlop, DryBell, EarthQuaker Devices, Eventide, EVH, Fender, Gretsch, Korg, Marshall, Music Man, MXR, PreSonus, Roland, Schecter, Shure, Source Audio, Way Huge, Tech 21, Vertex, Voodoo Lab, Vox, Wampler.
     

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  • Please note: We are a small, family owned business. While we want to make sure you are satisfied with your purchase, we would like to try to limit the amount of returns as much as possible. This helps both us and the customer save time and money. If you are unsure about a product, please contact us before you complete the purchase, and we'll do our best to find the item that will best suit your needs. Prymaxe reserves the right to define abuse of the return policy on a case by case basis and consequently refuse subsequent return requests by said abuser and place them "All Sales Final".

    Last Updated: March 27, 2018

    45-Day Satisfaction Guarantee

    If you are not 100% satisfied with your purchase, you can return it within 45 days of the original purchase date for a store credit refund, or within 14 days of the original purchase date for a refund to the original purchase method (PayPal, credit card, etc). If an item is not received by us within the 45-day window, the package will be refused. All new items returned must be in BRAND NEW condition with zero signs of wear or use and must be returned in the original packaging with ALL materials (free/bundled items -- must be unused/unopened, warranty cards, plastic, pouches, manuals etc.). We reserve the right to charge an up to 15% restocking fee on any opened guitars, amps, or keys being returned.

    Our 45-Day Satisfaction Guarantee covers brand new products only -- it does not cover used and clearance products (see below). It also does not cover items in the “What is NOT Returnable” list below. Please note: All actual shipping fees paid by Prymaxe will be deducted from your refund. This includes orders that qualified for free or subsidized shipping. Return shipping must be paid by the buyer. If you received a defective or incorrect item, please see our FAQ section below.  

    Used and Vintage: 

    All Used and Vintage items come with a 48 hour approval period. Please contact us directly at sales@prymaxe.com within 48 hours of receiving your product for us to set up a manual return for you. Be sure to include your order number and reason for return in the email. All Used/Vintage items must be returned in the same condition they were sent to you in, as well as include all materials that came with it.

    What is NOT Returnable:

    • Accessories (this includes all pickups, strings, picks, pedalboards, tuners, etc.)
      • However, if you received accessories with the product as part of a bundle, the accessories must be returned with the product, and they must be unused and unopened
    • Clearance Items (Clearance items are clearly marked with "CLEARANCE" in the title -- INCLUDING "DEMO CLEARANCE" OR "GENTLY USED CLEARANCE")
    • Special/Custom Orders
    • Personal items (such as headphones)
    • Any item that states all sales are final/no returns on the product page

    Return Instructions:

    All returns should be insured by the buyer and sent via UPS, Fedex, or USPS with tracking. Please do not write on or attach tape or labels to the product box (these will be refused) -- use a packing box to return the product. Attach a shipping label with the RMA number onto the shipping box. Packages without a valid RMA number on the outside of the box will be refused.

    To request an RMA number, please call us at 1-(855)-PRYMAXE (779-6293) (International Customers, please use 1-(908)-272-2990) during our normal business hours (Monday - Friday, 10 AM - 6 PM Eastern, excluding federal holidays).

    FAQ

    When will I get my refund?

    Once your return is received by us, your refund will typically be processed within 10-15 business days. It typically takes a few business days for all credit card refunds to be processed and reflected on your statement. This means it will take a few extra days for your refund to show in your account after your return is processed. Store credit refunds will be given in the form of a e-gift card which will be available for immediate use after it is emailed to you. Please note: All actual shipping fees paid by Prymaxe will be deducted from your refund. This includes orders that qualified for free or subsidized shipping. Return shipping must be paid by the buyer. If you received a defective or incorrect item, please see the next question.  

    What if I receive a defective or incorrect item?

    If a product is defective upon arrival, or the wrong item was received, all the shipping fees will be covered by us and we will give you a store-credit refund on the original order. For defective items, Prymaxe reserves the right to refuse the return if we determine the reason for the unit failing was not covered under the warranty (i.e., if the item was damaged due to user fault or error). If you feel your item was damaged in shipping, please take plenty of pictures of the damaged box and item and immediately contact us so we can open a claim with the shipping company.

    Please be very diligent with testing your defective item. Be sure to try other guitars, power supplies, cables, and amps. We also request that you take a video of the item not working. If we receive your item, test it, and find it to be working, we will give you a refund minus the cost of shipping both ways.

     

    When must I ship my return?

    Your return must be received by us within 45 days of the original purchase date for store credit, or postmarked by 14 days for a refund to the original purchase method (PayPal, credit card, etc). This means you must ship your return with enough time for us to receive the package within the deadline. If it does not arrive within 45 days, we will refuse the package. If you feel you sent the package within a reasonable time frame, but it arrived late due to the shipping company’s error, please immediately contact us to make an appeal before we refuse the package.

    What if I pre-ordered an item?

    If a pre-ordered item arrives outside of the 45 day window from when you ordered it, you will have 7 days from the arrival date to send it back for store credit.

    Why was my package refused?

    There are a number of reasons your package could be refused by us, including:

    • It was a new/demo item received outside of the 45-day window
    • It was a clearance, accessory, or other non-returnable item
    • The package is missing items that were included in the original shipment
    • The item shows signs of wear
    • The original product box was damaged or written on/the item was packaged in a separate shipping box