http://www.soundonsound.com/sos/sep00/articles/zoom.htm

A Full Review is at the link.

- Is the general configuration/setup simple? Yes, via PC
- Is the sound or effects editing easy? Yes, via PC
- Is the manual clear and sufficient?... Yes

- Are the effects good, usable and sufficiently realistic? Yes
- With what instruments do you use them? Electric Guitar
- Which are your favorites and/or the ones you hate? Stock lousy, your own, incredible.

This is a stereo preamp (with adjustable input gain on the front) with all the main guitar effects except a proper distortion. The flangers & phasers are lovely and the delays & reverbs are wonderful.

It's digital, of course, with 8 processors, 1 per effects module. So, unlike with other gear, you don't have quality loss when piling up effects, the quality remains optimal throughout.

2 high impedance asymmetric 6.35mm jacks, 2 line level TRS outs on similar jacks.
SPDIF in & out on coax.

24 bit 44.1 khz conversion, but not sure the digital I/O's can convey 24 bit signals...someone told be that they were 20 bit...(check that, i'm not sure).

There's MIDI in & out i believe, and you can easily set up a MIDI pedal board such as the Roland FC-200...the G-Force has a ready made template for it all set up.

For the price, i think they could have made this a 96 khz machine and/or have AES/EBU I/O's in addition to the SPDIF coax...it's just not a pro machine without AES/EBU!

Extremely easy to use, all is very very intuitive. You can see it wasn't designed like a TR-505 or an MC-303! :-D

Editing & saving presets is real easy.

Great manual, that is even nicely made...not just some cheap photocopy look-alike, this is nicely bound & all...a high-class manual for a high-class piece of gear. ;-)

The effects are nice but you can be tempted to overdo it...because they are so nice!
Then again, you'll have that problem with any effects processor...it's just that the others don't sound so good! ;p

The reverbs are amazing, of course, and you can use this for vocals or anything you like if you come in digital.
This is a very good effects processor.

The dynamics are good but not perfect: i still prefer going direct into a good amp, but if you accept that the sound is just different then you can enjoy it for what it is. It's still good, it's just not 100% the same...maybe only 95%? Anyway, incomparable with any Boss or Roland or Digitech effects i've tried...and i have tried a lot of those. True, the price isn't comaparable either! ;-p

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.

Boss GT-8...wow. Loads of effects.Loads of amp models.Loads of DISTORTION pedal models! Sheesh...what will they think of next? Anyway this guy has MIDI,USB,PCP... lol. All digital..I think..unless there is something analog on the compression and e.q.'s. Definitely ZERO tubes in this baby. Everything seems to be a model of something. Foot pedal...definitely not rack mountable, (but they do have the GT8 studio version... twice the price... not sure the benefits.. besides sticking it in a rack and then having to buy ANOTHER footcontroller.. grrrrr)

Um...Very simple as far as programming, saving presets, etc. Pretty intuitive, but you will need to consult the manual.... which compared to the manual for the Digitech GSP2101 (yeah, yeah...I have a review out for that) is very, very simple. It is pretty straightforward, but like anything else, when you want to really seriously build your own presets from the ground up..you will have to use the manual..(sorry kids!)
Lots of knobs, dials and buttons... so for sound shaping, amp models,distortion models.. easy to get started. The presets are actually not terrible either... so... you can hit the ground running.

Mmmm.. varies. I am not so crazy about the cab models...I prefer running this into a tube poweramp, then into closed back cabs as a preamp. Quiet. Exciting high gain models.. clean models are good, certainly usable... bordering on very, very good. I have heard a lot of complaints about digital artifacts and fuzziness from this unit. I think with a good tube power amp, it adds an organic flavor, and couple this with some good warm speakers you can get a bit more tube life and more active harmonics. The effects on this unit are not great...I guess I would compare them all to floor pedal type effects. No TC or Eventide here. They are missing the parameter controls and quality that you would expect from any world class effects unit, but it is certainly usable for live work as an all-in-one solution... very convenient and easy to tweak according to the venue. The highlight models would be the 5150 and Soldano models...not spot-on, but lots of fun. Pinched harmonic madness with either of those. Wah models are surprisingly decent..fair amount of variation and gets very close to Crybaby's etc. Using Les Pauls,Strats,Tele's, other metal-ly type guitars. Run it into a Carvin T100 power amp into a pair of Eminence Cannabis Rex equipped closed back cabs. Sometimes run a Keeley TS-9 and Vox Clyde reissue on the front end for variation.

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

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!

- a great bunch of effects

- Présets configuration is really easy. There's is also an EZ edit for even more quickness.
- The LCD screen and the effect chain diagram are well designed: in one look you see the active effects

- classic effects are ok, but it seemed to me that they sounded différent than the boss pédals.
- you can also find some "exotic" effects like the feedbacker, accoustic simulator etc. Some of them are cheap and some are really interesting (like the accoustic simulator used with the pickup simulator)
- Hated the "tube heads distorsions simulators", sounded thin and lifeless to me (Probably my fault: at that time i connected the GT3 in front of a transistor amp but didn't set the 3 band EQ as the manual advice)