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I'm not smart enough for Genzler Magellan

Boss Katana 500 he likes doesn't seem to fit that :)

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Maybe you can explain what this 'Cab Resonance' calibration is doing; Here is explanation by Designers at Bass Gear Review; I had powered cab that had Tech claimed to match Amp to that speakers characteristics this claims any Cab review also mentions their proprietary Class D fixes all of Class D Amps problems:)

From Bass Gear Mag
I had the pleasure of being in contact with the Katana designers directly, and we are lucky in that they gave me some fascinating and exclusive insights into the amp’s design to share with you! Here is some feedback directly from the “BOSS Team:”
“The impedance of a cabinet speaker is frequency-dependent. In other words, impedance changes value with frequency. This is sometimes referred to as the “impedance curve.” Typical class-D amplifiers reduce output power/wattage at frequencies with high electrical impedance.

On the other hand, traditional vacuum tube amplifiers (typically classes A, AB, and B) have been favoured for their ability to maintain a consistent power output (measured in watts/W) despite variations in electrical impedance. Furthermore, depending on the design, sound pressure can be increased at the lowest resonant frequency. However, vacuum tube amps are relatively heavy, not as portable, and often require maintenance. These problems, specifically, and others, have been solved with the Katana-500 Bass Head.

…getting the optimum sound from a head and cabinet setup requires understanding the characteristics of the many different cabinet speakers players freely choose to connect. While building a speaker cabinet fully allows you to understand its characteristics, it is time-consuming. Imagine, therefore, the value of a system that eliminates this barrier; that was the starting point for developing our Cabinet Resonance function…

…Overcoming significant challenges, a power amplifier with special electrical sensing circuitry that analyses connected speakers/cabinets was developed. This unique design allows the power amplifier to sense cabinet characteristics … while the cab is connected. Informed by our analysis results, we determined ideally how to drive the power amplifier for different cabinets. Subsequently, a new class-D power amp circuit design was developed based on feedback from professional bassists.”

TL/DR, In layman’s terms, the Katana-500’s Cabinet Resonance function optimises the interaction between amp and speaker/cabinet through a sophisticated sensing system and reactive class-D circuit. It’s designed to overcome the limitations of typical class-D amplifiers, which tend to reduce output at frequencies with high electrical impedance, causing a loss in sound pressure, particularly in the basement-dwelling frequencies.


The Cabinet Resonance function offers two selectable modes: Green and Orange. Green is tuned for a tight, fat low-end modern bass sound, while Orange produces a thicker, warmer bass tone for that vintage, laid-back feel. These modes were developed with input from professional bassists, ensuring they’re practical for a variety of musical styles and cabinet types.

Further amplifier behaviour “modelling” comes courtesy of the Amp Feel function offering “Vintage” and “Modern” tonal flavours.
“The Katana-500 Bass Head’s reactive drive class-D circuit is unique. It differs significantly from other companies’ typical class-D designs, like popular modeller/FRFR setups or modelling combos. Those designs tend to suffer from an extremely high damping factor, resulting in excessive speaker braking. This translates as an overly harsh, tight feel for the player.”
Some class-D amplifiers can be very low, but seem to lack girth in the sound.

“Using innovative DSP and hardware design, the Katana-500 Bass Head captures a wider range of damping factor characteristics, bridging the gap between the classic feel of tube amps and the modern precision of class-D. The Amp Feel control (Modern, Vintage, or off) comes into play here, working in tandem with the Cab Resonance function to achieve a variety of sounds and responses with connected speakers. With Amp Feel off, you get a flat response, but when Cab Resonance is added (Green setting), you get a great balance between dynamics and tightness. The Modern Amp Feel option provides more pronounced tightness, especially with the Green Cab Resonance setting added. Naturally, Vintage Amp Feel mode gives a warmer response, and with the Green Cab Resonance applied is the best balance between dynamics and low-end clarity.”

I'm getting TC Electronic RH450 vibes ... :).

Which is to say nothing against the amp itself -- I still have an RH450 and dig it out from time to time, but this does sound a bit like special pleading.
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Best barrel-type stereo jack: MEC vs Switchcraft vs Göldo

PureTone - The rest of their 1/4" product line are the best jacks you can get with much better design and double the contact area. So - I would assume their barrel jack is also very very good.

At Amazon
https://www.amazon.com/Pure-Tone-PTT5-Stereo-Barrel/dp/B07QFRS27C
Absolutely the best, I've put them in all of my Ibanez SR bases that use barrel jacks and they make excellent contact and firm up the physical connection to the 1/4" plug.
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Guitar Center used site

If anyone is in the Greenfield, WI area, the Music-Go-Round has a Washburn T-35 Taurus bass for $280. This bass was part of test batch of which only, not sure which it is, 35 were made, or, 35 were sent to the USA. They have this label as a T-25 which has a bolt on neck and Washburn import "J" pickups and a Washburn import preamp.

Note that the one mentioned is neck through and the electronics are stock as these were made with a Duncan MM pickup (as shown) and Duncan preamp (which, I am guessing is still in the bass.) The bridge is also stock, with 17mm (think Spector) spacing.

I have one of these babies, and it plays really nice. The neck has never moved. The pickup and preamp sound great.

Someone has attached finger rests (and removed them, leaving screw holes below the G string, and changed out the tuners and tilted them forward, like on Warwick basses. (The original tuners were gold.)

For a neck through 5 string that is quite rare, and at $280, is less than they usually sell for...

See it here... Used Washburn T25 Taurus Bass Guitar Wood 5-String @ 40015-S000345343
2bbbf8bb-f1d3-4117-93ba-77f8a618079e__04099.1785177720.JPG
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TE GP12MX Combo -- basic humming and some popp noises on shutdown?

The noises may indeed be normal, especially with the master volume turned up. There is no mute relay on these amps, so when the power supply collapses after turn-off, there can be a low transition voltage where the driver circuit becomes very unbalanced and will flip rail to rail at very low rail voltages.

The hum MAY be due to aging filter caps, but I wouldn't jump to any conclusions here. There are other things that can cause hum, including the layout, the internal ground current management and there's LOTS of circuitry that's always active before the power amp. therefore, because many parts in the amp are no longer available, I recommend that you leave it alone to avoid creating bigger (and maybe non-repairable) new problems.

These were not particularly quiet amps to begin with.
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Ibanez bass guitar

I have an ibanez bass guitar but i cant find the model online. I even tried the AI (i know shame on me) but after surfing the ibanez sites, and even this site i have found nothing. Is there anyone out there who recognizes this model? Is it a real ibanez or a copy?

Under the neck there was a sticket, but i only see the outline of the glue.

I cant upload the image so heres the link for the drive

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what scale is it?

40th Anniversary Jazz (Squier) vs Fender MIM

I had so many basses sprout fret, on high end basses even, that I bought a fret file, for DIY. I have grown to enjoy the tinkering, but once done, it's done.

I guess I could skeak into L&M with my file to have a bit of fun 😀
From '90, Jazz Plus and Ovation Premier Elite ABG, no sprout yet on either of these. Quality woods, quality build on both, USA-made.

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Two passive pickup set up, bypassing the neck pickup with a bridge pickup connected to a preamp

This may sound complex maybe someone can make sense of it, I have a humbucker connected to the mmsr preamp and I have a p pickup in the neck. Originally I was going to switch the preamp out but I like the sound of the preamp too much. So I was wondering will a unity gain buffer work for the neck pickup, isolates the signal from the preamp and can match the active preamp signal instead of coloring it? Any help will be appreciated

Medium scale bass strings that would be good for slap

Well that makes it a lot easier… yeah the D is 37.75 so it would just be the G.
Now that we've established the fact your bass can take just about any "long scale" strings, thanks to the reverse headstock, I can make a recommendation...

SIT Foundations, which come in both stainless and nickel, depending on your preference. They're designed to be relatively flexible due to a thinner hex core used, making them suitable for slapping.


Blending dirt with clean lows

I personally found that I don't like the only clean lows and only mid/top drive recipe.

I think it sounds fizzy and wrong.

I also found that some drive pedals works great just as is blended with clean signal, without it sounding like theres a clean signal sitting on top of the drive signal or vise versa, and without it getting muddy, where as others requires some EQ to the drive sound to blend in nicely, depending on the inherrent character of the drive pedal in question and which kind of drive effect exactly you are trying to obtain.

Some drive pedals do require a small low cut, others a mid hump, others again a mid scoop, to sit nicely in the mix.

That said it probably helps my cleans to blend in nicely that they are not actually all that clean but overdriven, by a preamp that sits after my drive setup, giving the clean signal natural compression, and helping the drive signal blend in more smoothly as well, since it too is running through the same overdriven preamp.

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