Manufactured for digitech by IVL technologies, is a High voltage mic tube pre amp, line level input, 4 band Eq, spdif and AES/EBU digital out at 18 bit 44k or 48k user selected, low cut, 20db pad, phase, and 48v phantom power, analog rms meter. Does a real good job warming things up. Nice OD is achieved using input and output gain knobs. Insert points are handy too. 2 rack space is needed for the massive power transformers. EQ is switchable to A/B adjustments. Clip meter is helpful to reproduce OD on things like snare and certain vocal sounds to imitate that vintage edge. Line level inpust are not good for instrument applications such as non-active bass and guitar.

Simple to use and better results than the sub $75.00 low voltage stand alones.

Good sound quality. Does not color the sound unless you add gain. Slightly overdriving a top snare mic or vocal really brings details out and adds a harmonic quality like a good old fender guitar amp does for guitars.

The Crossroads pedal from Digitech is like 7 distinct tones in one package. It offers a model of the following distictive Eric Clapton tones: "Sunshine of Your Love", "Crossroads", "Badge", "Layla", "Lay Down Sally", "Layla" (Acoustic), and "Reptile". The controls include a mode selector knob, 2 control knobs that allow you to tweak selected paremeters of the mode presets (like effect intensity or gain), and a level knob.

One interesting feature is the seperate amp and mixer outputs.
One frustrating thing is that the preset volumes of the different "modes" vary so much. It seems like they could have balanced them better, so you don't have to re-adjust them when you switch modes.

Not all of the 7 modes on this pedal are even usable in my opinion, let alone "good". There are a couple that are decent but it seems like Digitech bit off a little more than they could chew. The clean tones are impressive, the distorted tones are a bit bland, and the acoustic mode is just terrible. They should have gone without it. Overall, it lacked a warmth and depth to my ears.

Some effects are quite nice to have; like the rotary effect on the "Badge" model. Some effects are just cheesy, like the chorus effect on "reptile".

This is a pure distortion pedal. You can get overdrive out of it, there are even presets for it. However, I believe this pedal is specifically tailored for hard, heavy, driving distortion. The heavier, the better. It is a digital unit and cannot be edited via computer. It is a floor pedal, so it is not rackable. The unit has one input and two outputs. One output is for going to an amp. The other is a cabinet modeler that allows you to go straight into the mixing board.

Configuration is simple. It has four knobs : level, low, mid and high. As digitech says, they've set the gain on 11 and ripped off the knob ! Thus the lack of a gain knob on this unit. Sounds/effects editing is very easy and the clear, colorful manual makes it even easier. There are not only presets for just this unit, but the manual also shows how you can combine it with other effects to get a solo tone.

This pedal really only serves one purpose....it's a death metal pedal, just like the name says! As such, it sound greats for death, trash, nu-metal, and even heavy metal! I put this thing through a Fender Twin and it was palm muting hell (or heaven depending on your opinion.) It is great for heavy rhythm grind. Unfortunately, because the treble is so harsh, I don't feel this is a great pedal for soloing. The manual has a sample setup that has this pedal chained to a delay and a chorus for a smoother soloing sound. When I mimic this set up, it sounds a little better, but the treble is still too harsh in my opinion, even with the delay and chorus.

Digitech's RP line are computer chip driven multi-effects floor units boasting effects like flanger, phaser, rotary speaker, tremolo, envelope filter, chorus, delay, and reverb along with amp simulations of popular amps. Some have an expression pedal for assigning an effect to like the RP300A.
The RP300A features 1/4" input and stereo output jacks, headphone output, jam-along 1/8" input, and it includes an AC adapter to power it.

Let me just say, the presets might impress you in the store, but when you get home and really start playing you will want to start creating your own presets, which is fairly easy. Don't be deceived by the advertising, you can only use one effect at a time and not 12, but fortunately the effects are seperate from the compressor, delay, and reverb; so for example you can dial in your compressor settings, then your amp model, your effect like chorus for instance, then your delay settings, and then finally your reverb. But using chorus and phaser at the same time; you can't do that.

The effects are fairly good, maybe not as realistic as if you had individual stompboxes from Boss or DigiTech for each effect, but they certainly aren't junk by any means. They are quite usable, and they have up to 4 parameters to edit for each effect, which can be tedious but gives you more control. If you want LESS paremeters to edit and more simplicity then maybe the RP200 or 150 is for you.
I played a handful of instruments through this, mostly a Fernandes LP Junior style guitar and a custom Telecaster. I dug the clean sounds of the Blackface model with my Tele, and the Rectified model for distortion. I soon became addicted to swirling delays and whooshing flanger and phaser effects, and the spacey vintage vibe of the rotary effect. I was on an effects high for weeks. The compressor definitely comes in handy for getting even sustain as long as you arent heavy handed with it.
Ultimately, the amp models can sound a bit synthetic, and the effects don't sound analog, they are fairly obviously digital, but I think running into a good tube amp would greatly improve the sound from what I was playing it through: my old solid state Peavey combo.

I would imagine the speaker cabinet models would help in making this sound better for going direct into a PA system, but I still wouldnt want to unless I had to. Some comment it becomes thin.

Hmmm.. what are the effects used. Wellllll... this preamp/effects unit was definitely "it" back in the day... and yep. I'm the original owner. This is based upon the regular, 1-S-disc,no Artist,no chrome, no nothing GSP 2101. This is an analog preamp wed to a 24 bit digital effects processor, as well as including analog e.q.'s,compression, etc. The range of effects was pretty wide.. pitch shifting,chorus,delay,many different reverb programs ranging in complexity from basic multi effects grade reverb to close to studio quality programs... (with a veritable plethora of parameters to adjust..enough to give Bill Gates a headache.)
Not the MOST user friendly unit... but something that should be looked at as almost an instrument on its own.. It is fairly intuitive if you are just looking to adjust factory programs on your own, but if you are looking to create your own algorithms... then grab some coffee. Arm yourself with patience, the thick manual and a highlighter pen.. and you will be rewarded! ( once you understand the creating,mixing and saving patches.. it is easy... and the flexibility is unreal.)
Connections are 1/4 inch and XLR (with/without cab simulation),MIDI, and effects loop to sidechain other stuff. 2 rack spaces... Dunno if this has any USB thingie... hmmm

Easy to moderate for basic editing..a bit more difficult for creating patches, and deep parameter manipulation. Gosh. That almost sounded dirty. The manual is clear...a bit heavy to the Digitech propaganda side...however it is thick, comprehensive and has a bit to remember. Not for the plug and play guys. I mean it.

Good to great... The phaser is unreal for trippy, ambient Robin Trower, Pink Floyd stuff... with a LOT of different parameters available. Pick your wave shape. Same goes for the Chorus. Lots of delays available... very clear... total control over milliseconds you want.( no tap tempo).
Pitch shifting, extensive reverb programs ( with control over early reflections,high, low, mid freq. rolloff... and that is just the BEGINNING).
Tremolo... super. Compression.. eh. E.q.'s.. well.. there are a LOT of them. Graphic, parametric,notch... it has 'em. Panners, mixers, flangers, etc. 20-20khz clarity.

Ok.. So. The effects are pretty yummy. Just have to invest some time to really get to know the unit. The preamps... welllllll... again good to great. The cleans... amazing. I dialed mine in next to an old Fender Twin. I think I got my rig to sound sweeter. Mid level gain stuff... very very good with delays, etc. I get some great blues, edgy rock sounds. Nice and crunchy. (no factory presets...you have to adjust them to your taste.) Heavy distortion.. here is where it becomes a matter of perspective. I would say...do not use this amp with V30's or G12-75's....I would say it does best with an organic set of speakers and a good tube power amp. It seems to become a bit sterilized with modern Celestion heavy rock type speakers, and benefits greatly from some of the Eminence stuff or Greenbacks. Something warmer. This unit is great for tight hi gain rhythms.. i have had a love/hate relationship with this unit for leadwork. It does not get a very organic tone for lead.. but I have only used it with 6L6 based poweramps... maybe with an EL34 setup it would be a bit warmer... Less tight. More note bloom. Currently, I just use this as an effects device for my Voodoo Labs preamp.. but did use it extensively as my primary tone generator for years... ( Yep. I have had this unit for about 15 years.. still chugging!!) Use it with Les Pauls, Strats, Tele's, metal type guitars.
It sort-of respects the differences between these guitars... but really... on the high gain stuff it has it's own personality that it globs on to whatever guitar you play..I kinda hate that. The good news is... you can play a 2k Les Paul.. or a 200 dollar Rogue... and get them to sound close, quality wise

The Digitech Whammy is a pitch-shifting pedal that allows a variety of octave shifts and interval harmonizing. For instance, you can set the Whammy to harmonize 5ths and use the pedal to shift to 4ths. It also has a detune function, both shallow and deep, and a divebomb function which is essentially just a 3-octave drop.

Everything is spelled out on the face of the unit. It's not very hard to figure out, though it can take a little while to get used to. In order to change the pedal's function, you use the rotary knob which can be a bit touchy. I used my foot to change settings, and it's pretty easy to skip a function or two. Obviously, using your hand isn't really a problem, but for fast switching on the fly, using your foot is the easiest way. It's very easy to do, but the problem is that the control is touchy, so to change between settings with precision can be a little difficult. Not really the pedal's fault, I guess.

Alright, a lot of people seem to think that the original pedal is some kind of godsend while this newer version is crap. I disagree. Sure, there's probably some sonic differences between the two, but as far as artifacting is concerned (that "digitalness" that the sound has), you can hear the artifacts of the original WH-1 on some Rage Against the Machine songs, and they sound extremely similar to this pedal. The artifacts themselves aren't a bad thing, in my opinion. They create a dimension to the sound that either you can use to effect (like Tom Morello does) or you can't. The nature of the pedal is that it won't sound absolutely realistic, but I realize this and I don't knock the pedal for it.

The problem is that it sucks the sound out. Even when you're not changing the sound, you can hear a difference with the pedal on, and I really didn't like that aspect. It's not a true bypass pedal, none of the Whammy pedals are, but if you want a true bypass Whammy, you're only option is to by an original WH-1 and modify it, because that is the only Whammy that can be modified for true bypass.

The tracking is less than perfect. Artifacting aside, chords sound like crap and there is a perceptible delay between playing notes and hearing them. These qualities, along with the sound degradation, ultimately led me to returning the pedal. It's just not as great as it is often made out to be, and if you don't need to bend the pitch between octaves, you can get a much better octave effect with an EHX POG.

On the plus side, the detune function actually makes a great chorus, so it's not all bad. And the pedal can definitely be used to good effect, but it's got some downsides. Too many for me.

The Digitech Whammy II is a unique pedal that is a pitch shifter and has a detune option (which is like a chorus) and numerous harmony options. It is an analog effect and has a 1/4'' input and both 1/4'' wet and dry outputs. It has a bypass switch and is not a rackable effect.

This was really easy to set up - simply plug your guitar or other instrument into the input and send the wet output to an amp. The manual is very helpful for getting some sounds you might not have thought about on your own.

The pitch shifting effects on this pedal are truly great sounding on guitar. I love shifting up or down an octave and can make for some crazy effects. While I have not used it myself on keyboards, I did lend this pedal to a friend who used it a lot with his Yamaha Motif and said he loved using it with that. The detune option is also a great sounding chorus-like effect.

Analog preamp + digital multifx in a 2U rack
Got more effects than you'll ever need in this unit

- you got to be patient when you setup the 2101, the effects chains can be very complicated: lots of paraméters, same effect can be used and re-used at any place in one chain. The manual is well designed and very helpfull

The effects are really good. 2 groups:

- analog (préamp): compressor (excellent), distorsions (transistor or tube, they both sound very good)
- digital (multifx): the wha is cheap but otherwise all the effects are great (you've got here all the effects you can think of, even the whammy). You can blend the ratio original signal/processed sound with the mixers in the chain. I only had problems with the réverbs: lot of people find it great, i don't (T.C. electronics reverbs sound 10 times better to me)

You can really achieve uncommun sounds ala allan holdsworth etc. Everything is possible!