stevie

Nice review, by the way. As @stewblack suspected, the noise is unusual. I checked out a few detailed reviews of the amp on German websites (where they are more likely to call a spade a spade) and they specifically say the background noise is very low. This was most likely an outlier.

@Merton is one of the few people on here with one of these. No doubt he'll be along to advise soon.

As it happens, I have a pair of 8-ohm Celestion BN10-300X drivers here, with measurements saved on my PC. Having run these through a crossover simulation program, I'd recommend that you do not use a low pass filter because the driver rolls off naturally quite early anyway and you don't want to run the risk of dropping the impedance too much below 4 ohms. Just run the driver full range. I see you've already bought the components - so try it with and without and see which you prefer.

There will be more LFSys models next year - both bigger and smaller. A 2x10 is certainly a possibility, but there may be an even better way of skinning the cat. You can always build a 2x10 from two Monzas. The corners interlock to aid stacking - and you get the option of using one or two cabs depending on the size of venue.

The cheapest high-power head available at the moment is the Bugera Veyron. Despite its modest price, it's every bit as good IMO as the more expensive offerings from Markbass, Aguilar, Ashdown, etc., all of which I've owned at one time. It's the head I was using most of the time at the SE Bash Bash, if you recall (because you were right next to me). The only amp that's impressed me more on first listening is the new £1000+ Trace Elliot. However, the Veyron is available for under £300 new with a warranty or under £200 secondhand. It weighs 3kg - so slighly heavier than some, but still very lightweight.

Excellent!

Can you close up the holes on the back panel with matchsticks or similar? Just to eliminate those as a possible cause.

I can't hear the sound files on my PC. However, if pressure on the back panel reduces the unwanted noise, it might be worth checking out the input panel. See if pressing on it helps. It might be that the input panel hasn't been tightened up properly or hasn't been sealed with foam strip. As far as I can tell from the photo, the screws are socket screws - so you'll need an allen key that fits. The upholstery job on the back looks like it was done on a Friday.

The fact that Thomann don't mention that this amp is suitable for bass should ring warning bells. I did some searching, and found a discussion by some German bass players with actual experience of the unit. One person carried out and published measurements. Unsurprisingly (to @warwickhunt at least), the tone controls are an octave higher than one would like for bass. The Bass control is centred at 160Hz, for example, and Mid at 1.2kHz. Also interesting to know, the unit contains high and low pass filters that alter the frequency response according to output level. Bass is reduced as output is increased. I can see how that would work for guitar. According to the measurements, the unit does produce 200W into 4 ohms and 100W into 8 ohms with 1% distortion. However, at maximimum output, the high pass filter starts at about 150Hz and is 12dB down at 40Hz. The frequency response looks OK up until 25W. The consensus was that it's OK for home practice for bass, but the variable filters make it unusable for anything else.

How many bass guitarists reviewed the product?

I love this song! Your transcription looks pretty accurate to me.

I took a few photos but they seem to highlight my lack of photographic skills.

Try to find @Phil Starr's cab assembly video on here. It's inspirational.

More here: https://www.katyhurt.com/video Great singer.

I like Suzuka. That'd work. Let's see.....

Great band! When I saw the first vid, I thought - why's he playing a Strat? Then I watched the second one. That's better. It's country after all.😁

I think @basstone does amp repairs. Send him a pm and ask.

I don't know what it was about the Trace, but when @Merton plugged his bass in and played through it, it seemed to take the sound quality up a notch - like he was playing through a huge sound system.

That was brilliant. The level of musicianship was off the scale - everywhere. And those tasty bass fills that drove the piece without (as it often the case) getting in the way. Loved it!

As a regular to the SW Bash, I looked forward with anticipation to my first SE Bash - and I wasn't disappointed. It was a brilliant day! First, the venue was outstanding. There were half a dozen medium-sized rooms, all with reasonable, if not wonderful, acoustics. This made playing at a decent volume possible - unlike in a single large hall, where one loud player can drown everything out and get on everyone's nerves. The organisation was as smooth as a baby's bottom - thanks to Colin and the gang. (I only realised afterwards that Colin is @Hamster. Oh well.) There were some nice goodies in the raffle, and I managed to win a practice amp for my son, who is starting to learn bass at uni and needed something tiny for his flat. Result! Like the SW Bash, everyone was exceptionally friendly and welcoming, with a good mix of beginners and advanced players. It was a joy to meet so many of the people I've chatted to here over the years. The basses on display were out of this world. But really! Quite a few custom jobbies, with more Wals than I've ever seen in my life before, plus Spectors and Musicmans galore. I think Jeff @tubbybloke68 broke the record for the number of basses at a Bash. They were all in fabulous condition and available for anyone to play. As for sounds, I was knocked out by @Merton's 1200W Trace amp. I wish I could afford one.🫤 Then there was the sound of @chyc's double bass, which was absolutely glorious. I'm so glad he went to the (not inconsiderable, I'd say) trouble of bringing it. At the SW Bash, the floorshow is usually hosted by @Phil Starr, who does a brilliant job of keeping us informed and entertained. However, even he was outshone by the brilliant combination of Laurence Cottle and Guy Pratt. Guy was exactly what we expected - interesting, witty and entertaining, and Lawrence provided a fascinating insight into the world of the pro bassist/composer/studio musician, which included a demonstration of a piece he had to sight read for a recording. Mind boggling! What really impressed me was the way both pros made a point of wandering round the rooms, chatting and joking with everyone. Kudos. I think @BassforradioDarren Redick also deserves a big hand for the professional way he introduced and interviewed the guests. I kept missing Bass Centre Barry. I wanted to say hello because I used to be one of his regular (although less important) suppliers when he ran the Bass Centre. I can, however, confirm @silverfoxnik's observation that he still has a full head of hair, although it's unsurprisingly not the same golden blond colour of yore. But hey ho. It gets us all in the end.😀 See you next year. (And thanks to all the nice people who said they liked my cabs).

The Trace was sublime. I've always thought amps were much of a muchness - but the Trace sounded ridiculously good. Thanks, @Merton for the short- term loan. They look good together, too!😄

I'm not saying your design won't work (it will) but If you make the box a bit bigger, say 35 litres, you could use a 4-inch port, which would help, as a single 68mm port is going to run out of puff quite quickly. The response also looks a bit better with the slightly larger box.

In that case, @TheGreek, I'll be canvassing opinions to find out whether people like it.😁

I have a few names in mind. The reason I haven't chosen one is that this is a brand new design that's not even been road tested yet. The paint might even be wet. I'll be canvassing opinions at the Bash to find out whether it meets a need in the market.

At least you didn't say Cabby Mccabface. 😀