SA-EQP1A – Analog Tube Equalizer

Historic Tube Equalization

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(8 customer reviews)


The SA-EQP1A recreates the famous tube equalizer sound of the Pultec EQP-1A and combines it with the MEQ-5, all in a 2U rackmount.

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SKU: sa-eqp1a-2019-b1 Category: Tags: ,

Two iconic tube EQs in one piece of hardware

The SA-EQP1A is one of our most ambitious projects to date. Until now, there hasn’t been any comparable product that would truly respect the sound and legacy the iconic tube EQ has been offering since the 50’s. That is, at least not without a hefty price-tag.

At the beginning of the project, we weren’t sure if we wanted to build an exact replica of the EQP-1A or the popular MEQ-5. In the end, we opted to build a fusion of both equalisers into a single unit, thus adding the coveted mid-section of the MEQ-5 (200Hz to 7kHz) into the EQP-1A, in a manner that that carefully respects the ratios and frequency response of the timeless classic.

Our version uses the exact circuit topology, with the option to add or bypass the mid-section of the popular Pultec MEQ-5. Unlike other replicas, we didn’t settle for two transformers (input/output) and decided to respect the original three transformer configuration using an inter-stage transformer: a critical component to obtain that superb low-end, silky high-end and tonal shaping heaven, with the added bonus of making the unit even more stable, providing a consistent performance and a lower noise-floor. Every single knob thoroughly follows the ratio and frequency response of the classic unit, but we also added an output gain dial so that two units can be matched with ease for stereo operation.


The SA-EQP1A is built with premium components

With the aid of a premium input and an inter-stage transformer as well as a Sowter output transformer, inductors, JJ tubes and a fully discrete class A circuit with premium Vishay capacitors, we accomplished our goal: to offer the authentic sound palette and complete functionality at an affordable price.

The timeless technique of boosting and attenuating at the same time, to make use of the unit’s sweet EQ curves, can now be in your hands, and in your studio.


100% satisfaction guarantee – if you don’t love your SA-EQP1A, we’ll refund you

If you’ve used an original Pultec EQP-1A or MEQ-5 before, we’re extremely confident the SA-EQP1A will put a big smile on your face every time you use it. However, if you’ve never touched the original before, as gear-lovers ourselves we understand that the only way to really know if this tube EQ is for you, is to put it through it’s paces. That’s why the SA-EQP1A comes with a 30 day money back guarantee. This allows you to get it into your rack and see how it impacts your recordings. If you love it (and we think you will!), great…keep the unit and create amazing music with it. If not, no problems. Just send it back to us and we’ll fully refund your purchase. Don’t worry, whichever way you decide to go we will remain friends.

Technical Specs

  • Class A, all discrete circuit
  • Sowter input , Interstage and output transformer
  • Cinemag and Carnhill inductors
  • WIMA Capacitors
  • Original circuit and schematic
  • MEQ5’s mid band section added (bypass)
  • Premium 12AX7 and 12AU7 tubes
  • XLR and TRS transformer balanced inputs
  • XLR and TRS transformer balanced outputs
  • Low frequency boost
  • Low frequency cut
  • Mid Frequency cut
  • High frequency boost
  • High frequency cut
  • Switchable 115/230 volt IEC power inlet
  • Dimensions: 19 x 3.5 x 6 inches – 2RU rack mountable
  • 1 year warranty (excluding tubes)

8 reviews for SA-EQP1A – Analog Tube Equalizer

  1. assaad.lakkis

    I bought a pair of these bad boys. The bottom end on the Stam, was tight and punchy (no flubber) and resonated beautifully! The high end was silky and smooth, it was so pleasant to the ears. The sonics were deep and 3d, I love these units. Yes do believe the Hype, Stam stands up like a champion and most importantly I love what Joshua stands for in the market, these units were made with heart & soul, you can feel it. Best investment I made! Thank you

  2. Serge monette

    Great product! The build is very good, very solid.
    Sound quality is excellent!

  3. Dylan Penney

    Increíble producto

    Gracias Joshua van der Stam y Camila junto a todo el equipo de Stam Audio que está detrás de estos maravillosos productos.

    Es increíble la magia que tiene en las voces solo aumentando los 100 hz y los 10Khz, brillan! Y le da una presencia tremenda.

    Ni hablar de la tarola y principalmente el KICK!!.
    en TODO brilla esta unidad.

    Gracias por el rango de frecuencia medio lo amo igual 🙂

  4. Stephen Kurpis

    4/5 Stars

    I have a pair of Stam’s Pultec clones and I’ve already run two mixes thrum them as part of my 2-bus chain (Manley NuMu > Massive Passive > Kush Clariphonic > Pultecs > Gyraf G-Bus).

    The good: Compared to similarly priced clones of Pultecs, the Stams clearly benefit from the inclusion of the 3rd transformer stage (as per the original design). They greatly help to round over some of the top end edges that the Clariphonic creates to give a bright, but rounded, top-end. The other clones I’ve heard I’ve heard are less ‘warm’ and add too much edge to the top-end for a Pultec style EQ; at that point, I would rather go just the UAD route. I also love the refined purist route they went; including the third transformer stage, but also morphing in the mid-band control of the M-EQ Pultec!

    The bad: Took 9 months to fulfill the order, and a bit too many paranoid e-mails with customer service to keep up to speed. They also shipped to my old studio address despite my message to them that I had moved; however, this isn’t ridiculous considering that it was the address on the PayPal invoice. That being said, I can see the improvements that Josh is making to how the ship floats (rather than just how powerful the cannons are), so I’m very optimistic that Stam will prove to be an excellent company.

    Best of luck Stam! I’ll definitely have more purchases from you in the future!

    – Stephen Kurpis / Vitruvian Sound NYC

  5. John Graves

    These EQ’s are well thought-out and faithful recreations of the originals. Bass magic attenuation? Check. Variable mid clarifying? Check. Beautiful high-end silly smoothness? Check. Two EQ’s in one, a fraction of the cost of a branded unit, and genuine, premium components. What more could you possibly ask for? I would have never afforded real Pultecs but I don’t feel I am missing a thing with these beauties. So glad I bought a stereo pair!

  6. Frank P.

    I got my pair of EQP1A yesterday

    They look and work very good.

    My first test on the mixbus was completely convincing. Very good sounding units. Clear, warm and big. Everything works perfect. So cool to have the mid band with the cut/boost/bypass option.
    This is a big bonus !

    These EQs are very effective. (The same Setting on an UAD or waves Plug In sounds absolute dull. sorry for this unworthy comparison. but other plug ins are often more similar to the modeled hardware units)

    It feels like you can boost much more with these units without getting an exhausting sound. I am absolutely satisfied. Can’t wait to use them on my next mixes and for tracking.
    Thank you so much Joshua !
    Great work

  7. Chris Kleiner (verified owner)

    Awesome. Worth the wait. EVERYTHING sounds better through them. Only wish Stam would keep making them (or hope the make something similar) so more folks have the opportunity to have these.

  8. Menno Bakker

    Bought a pair of these with the NOS option and as match pair. Well worth the wait. Dailing in the highs is a party. These is great on the masterbus. Really really nice

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