The cheapest is probably the Behringer Ultra-DI PRO DI800 or Behringer ULTRA-DI PRO DI4000 Direct Box.
There, I said it.
A couple more to consider at various price points:
Pro Co DB-4A Quad Direct Box
Radial ProD8 Eight Channel Rackmount DI
You're right, it's probably just an empty slot for a ROM block.
If you feel adventurous you could open it up yourself. Otherwise, it will cost you a bit to have a tech do it. Of course, for the cost of that tech service you get a working synth, so it's worth it!
If the sounds are playable, editable, and storable, then it seems like you just need a new backup battery. If there were major circuit boards missing the keyboard would be unplayable.
Have you tried a different foot pedal? There could be something wrong with the pedal, and you need to eliminate that possibility.
Also try a different midi cable from the KX88 to the Casio.
Have you done an actual hard reset of the KX88, or just cycled the power?
If you are worried about a...
I do think that tubes make a difference in the sound of the ART PRO series gear. Whether they are low voltage or not. Swapping tubes will not make as big a difference as in high voltage gear, but they will make a difference.
At least that was my experience with the ART PRO VLA units that I...
You seem to have made the decision to replace the tubes without even hearing the unit first. I suggest using it for a while with the tubes it has in it. And only after that think about which tubes to use, once you have learned the tone of the unit.
The nice thing about tubes is that you can...
A depth of 12" is too shallow. There's a lot of gear that wouldn't fit in that. But I think 22" is overkill. You'll most likely be safe with a depth of 18".
If you think about how deep 22" is, that's a pretty deep rack to be lugging around. It means extra weight and awkwardness when moving it...
Yeah, plugins sound like the real thing until you hear the real thing.
That said, I do like my PSP 42 delay plugin. But I don't expect it to have the mojo of the real PCM42.
These are all essentially clones of each other. Either of the XL units would be the "best multi-effect" in this poll. You could throw a dart and basically have virtually the same capabilities.
This all sounds good to me, just make sure you get a nice mic to go with that nice preamp.
Outboard hardware reverb does make a big difference, at least to my ears. Reverb/FX boxes that I've found to be useful and worth the money are: Lexicon PCM-91, Kurzweil KSP8, TC M3000, Klark Teknik...
Basically, only high quality components are worth the switch. For you I'll say again that if you are recording acoustic instruments and voice, the biggest improvement you could make would be with quality preamps and mics. Then after that, a good AD converter. That will be your biggest bang for...
I find I use my outboard hardware reverb units quite a bit. Then outboard compressors, and after that but much less, outboard eq. I really do believe that hardware reverb is still the way to go, it just mixes better in my opinion. Compressors too, there's just a naturalness and mixability to the...
You need to use the outboard verb unit as a send, not an insert. So you would match the hardware I/O to the corresponding software routing within PT. Should work no problem, I do it all the time with my hardware rack reverbs. The trick is in setting it up: make sure your hardware connections...
The Mackie would just be a side step, yes. No point in spending more money unless you are going to upgrade in a substantial way.
Also, the Satellite doesn't have midi, which the Firebox does.
I don't think you are going to blow your amp or speaker no matter what frequency you play. That's more about volume, no matter what type of amp you are using. The guitar amp simply won't reproduce the keyboard sound very well, and is not stereo. In short, keyboards through guitar amps sound like...