SKU: 55873674933

Solid State Logic E-Series Dynamics Module for API 500 Series Rack

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Description

Solid State Logic E-Series Dynamics Module for API 500 Series RackCompressor and Limiter Expander and Gate Five Segment LED Indicator Meters True RMS Converter on Sidechain Linear or Logarithmic Release Curve Circuitry from the SL 4000 E Console Sound of the SL 611E Channel Strip Gain Element Replicates Class A VCA Chip Fits in API 500 Series Lunchbox The Solid State Logic E Series Dynamics Module for API 500 Series Rack is a single unit API 500 Series lunchbox style compressor limiter and expander gate module. The

  • Compressor and Limiter
  • Expander and Gate
  • Five Segment LED Indicator Meters
  • True RMS Converter on Sidechain
  • Linear or Logarithmic Release Curve
  • Circuitry from the SL 4000 E Console
  • Sound of the SL 611E Channel Strip
  • Gain Element Replicates Class A VCA Chip
  • Fits in API 500 Series Lunchbox

The Solid State Logic E-Series Dynamics Module for API 500 Series Rack is a single-unit API 500 Series lunchbox-style compressor/limiter and expander/gate module. The device utilizes a similar circuit design and components as the original SSL E-Series channel strip, including a true RMS converter in the sidechain and a gain element that replicates the original Class A VCA chip.

Half of the module consists of a compressor/limiter with a ratio control that allows you to select from no compression to full limiting. You can change the curve from over-easy to hard-knee style compression with the push of a button. A threshold knob allows you to set the threshold at which point compression occurs between +4 and -26 dB. A release knob allows you to set the release time between 0.1 and 4 mS. A linear release button allows you to switch between a linear and a logarithmic release curve, and a fast attack button allows you to change the attack time from 3 ms for a 20 dB gain reduction to 30 ms for a 20 dB gain reduction. For metering, the unit has a 5-segment LED meter that shows the Compressor/Limiter activity in red and yellow and the Expander/Gate activity in green.

The Expander/Gate component of the module features an EXP button for switching between a 20:1 gate and a 2:1 expander. You can set the range of gating or expansion between totally inactive to up to 40 dB. A threshold knob sets the level at which the gate or expander engages between +4 dBu and -26 dBu. The threshold circuitry is designed with variable hysteresis which increases in relation to the threshold being lowered. This allows the sound of a musical instrument to decay below the threshold and before being gated or expanded by the module. The Expander/Gate section of the unit generally has a linear attack time of 1.5 ms per 40 dB, but this can be changed to a faster attack time of 100?s per 40 dB with the push of the FAST ATT button. A release knob allows you to adjust the time between 0.1 and 4 seconds at which the Expander/Gate will reduce the signal level after it is under the threshold. There is also a dynamics "In" button that allows you to put the entire module in or take it out of the circuit in your API 500 lunchbox-style rack.

UPC: 878076000961
In the Box
Solid State Logic E-Series Dynamics Module for API 500 Series Rack
  • Limited 1-Year Warranty
Format 500 Series
Type Discrete
I/O 500 Series with:
1 x balanced XLR input
1 x balanced XLR output
Power connection from lunchbox rack enclosure
Compressor
Ratio 1 to ?
Threshold +4 to -26 dB
Release Time 0.1 to 4 ms
Gate
Range 0 to 40 dB
Threshold -30 to 10 dB
Release Time 0.1 to 4 s
Dimensions (HxW) 5.25 x 1.5" (13.34 x 3.8 cm)
Weight 15.3 oz (434 g)
Packaging Info
Package Weight 0.75 lb
Box Dimensions (LxWxH) 10.866 x 7.402 x 2.677"
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 55873674933

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4.7 ★★★★★
Based on 26 reviews
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D
Verified Purchase
David Spencer
Lake Worth, US
★★★★★ 5
Good stuff
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Good stuff, easy to use, self adhesive backing contours around curves easily and works great.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
S
Verified Purchase
stookie778
Louisville, US
★★★★★ 5
Works amazingly, but only if you install it correctly.
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
If you purchasing Siless Liner 157 mil (4 mm) Sound Deadening mat, to block unwanted sounds in your car, this is what you need to buy. But wait! It's not the only thing you need to buy if you want to "actually" deaden sound. By itself, it will definitely block a noticeable amount of sound, and, most likely, that's all you realistically need. But... But... If you want the Siless Liner Sound Deadening Mat to really help you take it up a few notches, to get the best sound almost bordering on soundproofing, listen up. You will have to install traditional butyl rubber first. Doesn't have to be the Siless brand, but I'm sure they would love to sell both to you, I used both Killmat (80mil) and Noico (50mil). I have a Honda S2000. It's a two-seater convertible sports car if you don't know what this car is, and it's loud when I'm driving above 60mph. I also happen to have a sound system installed as well. Other than that, the car is stock. I first installed the butyl rubber on the car's interior sheet metal. I went all out and covered everything I could. I didn't need to but I wanted to. I was extremely impressed with the results. But I wanted to go further. Not because I needed to but because just wanted to see what it would be like. So I bought Siless Liner 157 mil (4 mm) 36sqft Sound Deadening mat to go on top of the butyl rubber mats. I put this over every area I installed the butyl rubber. I had to be careful of clearance issues since I added a significant amount of underlayment, and you should too. If you put butyl rubber sound-deadening materials in 50% of the total interior area, you'll hear a noticeable improvement. If you put butyl in about 80% of the total area, you'll be even more amazed at the improvement, compared to before. I originally did all the above myself, so that's my experience and so your mileage may vary. I then installed the Siless Liner Sound Deadening mat over every place I could even going further than I could with the butyl rubber. I used the Siles Liner in areas where butyl rubber would not have been effective, such as the roll bar hoop area and large empty cavities or holes. I covered everything I could, firewall, doors, floor pan, transmission tunnel, trunk, trunk lid, fuel tank area, rear quarter panels, and rear-wheel tunnels, in Siless Liner Sound Deadening Mat. WOW!! The Siless Liner Sound Deadening Mat was the icing on the cake! Let's not forget, this car is a convertible sports car so it will never be a quiet ride, ever. But I can now actually have a conversation with a passenger at a normal-ish volume! This also means I can now have a normal hands-free phone call without having to plug one ear to block out the noise! My sound system sounds so much better! Just by going through the install process, I looked for any vibration, rattle, squeak, and noise-prone areas to either eliminate or reduce unwanted noise production. If you forget this step, the inside and outside of your car will rattle and buzz. I skipped this step the first time around. But did it right before I installed more butyl rubber and the improvement was impressive, especially inside the car. Outside the car, I didn't notice a difference until I put the last layer of Siless Liner Sound Deadening Mat. The sound deadening mat works both ways from what I can tell. If I turned up my music, as loud as I occasionally do, parked in the attached garage to the house, with the garage door closed, I would be barely able to tell the car was playing music in the garage. It sounds like it is another car, just a little bit down the street, with a very loud base. If you stand 20 feet away outside the car, the sound system is noticeable, but not obnoxious by a long shot. Get a 3 piece wood/metal roller set as well, which makes quick work of large areas.
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Reviewed in the United States on December 23, 2021
L
Verified Purchase
Ligia
Pawtucket, US
★★★★★ 5
Better than Kilmat
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Great adhesion, and you can immediately see the sound difference when you rap the area and compared it to another area without it. Also, very easy to cut and apply. Once on, you may not be able to peel it and reposition it, so be sure where you want it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
J
Verified Purchase
J M.
Alexandria, US
★★★★★ 3
Not much noise reduction…
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
Easy to install but did not provide much sound dampening…
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
M
Verified Purchase
Mike
New York, US
★★★★★ 5
Great sound mat for the price!
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
This is a good product. Many people go with KILMAT because of the value to price point. I did as well. When you clean the surface (in my case it was all painted metal) this stuff sticks very well. I do recommend you use a seam roller of some type, I used Lumiteco 3 piece roller set. This will help with adhesion and mostly flatten the overlapped edges. It also helps you see where you have rolled as it leaves little grooves. The difference when we had no sound mats and after was very impressive. We haven't finished our install yet and it is quieter than when we had an interior in the van. There are thicker mats available in other brands, but this will work great for our van build, but this helps keep the weight down. It is quality material, just be careful when you are removing the backing, the edge of the foil face can cut you. I suggest you layout where you are installing the mat and cut to fit. From what I have read, you don't need to cover every inch in the vehicle, just spot install for a big difference. I chose to cover most surfaces to help keep sound out when we are sleeping in the van. We haven't finished putting the van yet, but we have driven it around and been very satisfied with this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025

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