SPL Reducer

I have a Marshall JMP 2203 Master Model Lead 100w Mk2 from 1979 with two 65W speakers and on club gigs and at rehersals was way too loud. That kind off amps start to perform best at 3/4, i used to play at 1/4 or less. USED TO!!!
With SPL REDUCER i finally have true hot tube sound of this excellent amp even in my house. I have SPL for two days and as far i played with it I think its really minimal change of sound even at bedroom level. Check yourself some videos about SPL and you will see like i did. Its great it is pasive. It gets hot so have a beer and your fingers away and wait until tubes and SPL cool down.

It looks very cool, solid. Considering the impedance setting knob is at front panel near two other volume knobs, be carefull not to change them in the dark. Don't set impedance while operating!!! I put some tape across it for safety!

If lost i would buy another!!!

This is a passive attenuator which does not alter the guitar's tone unlike active attenuators do.
It is very simple and easy to use and the minimal features may also preserve the guitar's tone, just like a simple guitar amp when compared to a more complex amp.
Also, it can attenuate up to 200W of power (for 8 ohm cabinets) which is one of the most powerful I've come across on the market.
I was considering getting an other type of attenuator which uses a speaker motor and is said to be even more transparent on tone but SPL's professional site and informative video demos on YouTube convinced me to make the choice to get this attenuator instead.
I also want to mention that SPL have a very helpful service and will answer all your questions.
Personally, I will order a second copy of this model because I have two cabinets. I could use one attenuator for both but two would handle the power more easily and the amplifier's master volume could be set higher, allowing for more power tube tone and even saturation, if desired.
As for features, it's all on the item info page; for example, variable resistance for use with different amps and the text at the back is printed both upright and inverted, for easy reading when it is connected and you want to read the connection info! Very good idea!

I bought it because of SPL great promotional videos on youtube and information in their website. I was looking for attenuator which affects sound least and fits my budget as well.

What I like about it is that it does not need a power supply to work - it is completely passive and that that saves sound quality a lot I think.

I missed some functions like other attenuators have, like additional line level output or dual output to speaker ports. All those gadgets probably do reduce the quality of sound and probably needs external power supply, but I still quite missed them :D

When I started it for the first time there was lots of plastic/chemicals smell smoke coming out from it, so if there is any possibility to play it for the first few hours outside to burn all that stuff off - I highly recommend it. In my case it was way too cold outside to do anything, so the flat was really smelly for the next few days.

Later the variable switch started to not work when in position around the middle, so I sent it back/returned it. But of course it can happen to any attenuator - probably it was defected one or something.

Visually it really does look and feels heavy-duty/high quality made.

However, I still was really happy about its sound quality - if you don't need dual speaker port out or level line port out, I highly recommend it.