Modelling Preamp
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- Signal Processors >Effects
Behringer's cost-effective take on amp and cabinet modelling, plus effects, is now available for bass players
Photo: Mark Ewing
The premise behind modelling preamps such as the Bass V-Amp under review here is that what we're most often looking for when treating a guitar or bass is to ape a generic sound — either that of a player or of a combination of effect, amplifier and speaker cabinet. So, firstly, in modelling-type products, internal algorithms are programmed to imprint on the incoming signal the characteristic frequency balance, distortion products and dynamic envelope of a selectable range of classic backline amplifiers and cabinets. Secondly, the modelling stage is followed by an effects engine that can generate all the usual effect types, plus, in the V-Amp range, a few less common ones — Synth, P-funk'n and VCF+flange, for example, in the case of the Bass V-Amp. Of course, amp and cabinet modelling is never an exact science, especially when the modelled sound is augmented with that of a real amp and cabinet further down the line. However, the success of modelling hardware and, for that matter, software plug-ins, in the last five years or so suggests that the approach has something to offer.
Before I go on to flesh out the Bass V-Amp's take on modelling effects, I have an early gripe: the owner's manual is awful. In order to make the best use of the review period, I thought I'd better read the manual to get up to speed as quickly as possible. However, not only did it not make a great deal of sense, perhaps as a result of translation from the original German, but it also seems to have been written with little regard for structure and the needs of a new user. There's no 'Getting Started' section, no self-contained explanation of the basics, no block diagram of the signal path, and a confusion all the way through that comes from the manual's attempt to cover the Bass V-Amp Pro at the same time. The manual is so hard to use that it really did colour my early opinion of the product. Even now I still don't feel I fully understand the entire thing, but life's simply too short to make sense of a manual as difficult to read as this.
Included Amp Models
Photo: Mark EwingBASS AMP MODELS:
- British '60s: based on the '68 Marshall Super Bass Plexi with vintage EL34 tubes.
- British '70s: based on the '69 Marshall Major.
- British '80s: inspired by the '80s sounds of musicians such as Mark King from Level 42.
- British Pop: based on the Vox AC100.
- Thunderbird: similar to small bass combos such as the Behringer Thunderbird BX108.
- Mosound: based on the Ampeg B15.
- Rock Classic: based on the Ampeg SVT Classic.
- Rock 2: based on the Ampeg SVT Classic Pro II.
- Silver Panel: based on the '67 Fender Bassman.
- White Panel: based on the Gallien Krueger 800RB.
- Red Panel: based on the SWR SM400.
- Gold Panel: based on the Eden Traveller WT300.
- Californian: based on the Mesa Boogie 400 Plus.
- Bottom End: inspired by the deep bass sounds of Justin Meldal-Johnsen.
- Tube Preamp: generic valve warmer, but best suited to bass signals.
- Jazz Tone: based on the Polytone A101.
ELECTRIC GUITAR MODELS:
- Modern Hi Gain: a sound designed for grunge guitarists.
- Rectified Hi Gain: based on the 1994 Mesa Boogie Dual Rectifier Trem-o-verb.
- Custom Hi Gain: based on the '69 Marshall Plexi modified for Eddie Van Halen.
- Ultimate Plus: lead sound with extremely high gain.
- British Class A: based on the Vox AC30.
- Crunch V-Amp: a sound designed for modern blues or jazz.
- Drive V-Amp: based on the Mesa Boogie Mark III.
- Brit Hi Gain: loosely based on the Marshall JCM800.
ACOUSTIC GUITAR MODELS:
- Piezo Sim: recreates the sound of a piezo pickup for an electric guitar input.
- Mic Sim: recreates the sound of a miked steel-string acoustic for an electric guitar input.
- Magnetic EQ: corrective EQ for signals from magnetic pickups.
- Piezo EQ: corrective EQ for signals from piezo pickups.
KEYBOARD MODELS:
- Black Twin: based on the '65 Fender Blackface Twin.
- Organ Classic: based on the Leslie 960.
- British Classic: based on the '59 Marshall Plexi.
- Classic Clean: based on the Roland JC120 chorus.
Amp/Speaker Modelling, Effects & Compressor
In spite of the shortcomings of the manual, what I have gleaned is this. The Bass V-Amp offers 32 amp models, 23 speaker cabinet simulations,16 down-stream effects, and a compressor to level things off before the output. In standard setup, each amp model is tied to its respective speaker — the idea being that you're after the classic sounds and therefore won't probably be that interested in, say, an Ampeg B15 driving a Trace Elliot 4x10. You can swap amps and speakers around, but I'm not sure you'd necessarily find the exercise all that valuable. There's also a tuner (one that, praise be, makes a good stab at locking on to the low 'B' on a five-string bass) and independent access to the signal drive, tone, boost and split functions that, within the amp modelling algorithms provide overdrive characters.
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The busy rear panel of the Bass V-Amp offers (from left to right): TRS stereo aux input, aux input thumbwheel level control, stereo line output pair, PSU connector, MIDI Out/Thru, MIDI In, footswitch input.Photo: Mark Ewing
Overdrive with bass? Well, no, it's not the most oft-used bass effect, but despite being christened the Bass V-Amp, this product is actually designed for keyboards and guitars also. This seems a strange decision to me, and may well disappoint bass players who buy it and find that a third of its effects aren't really designed for their instrument — although some of the 'wrong' effects work quite well on bass. It's even stranger given that Behringer already have the original guitar-oriented V-Amp products. Maybe the market for a bass-only product simply isn't big enough?
Nice touches (just to prove I didn't get entirely out of the wrong side of the bed!) are the heavy-duty footswitch for selecting preset locations, a good-quality flying-lead mains adaptor, and a smart, if slightly camp looking, zip bag for carrying everything around.
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The Bass V-Amp has a generous 125 memory locations for storing patches. As supplied, however, all the locations contain factory presets, so storing one of your own patches necessitates overwriting a factory one. It is possible to recover the factory presets, but only globally, so you'd therefore lose any user patches — Joseph Heller could have used that in Catch 22. The only workaround for the problem is via MIDI (the V-Amp is fully MIDI controllable and has a full set of MIDI In, Out and Thru sockets) and Behringer's PC-only freeware V-Amp editor software — shame there's no Mac version, considering the high proportion of Macs in music production.
The final few features are an auxiliary stereo input jack and level control that Behringer say are intended to enable the unit to be used for playing along to CDs (in which case surely a pair of phono sockets would have made more sense), a headphone socket, and a setup page that enables the two output sockets to be configured in various modes to carry signals appropriate for live or studio applications. For example, mode L2 makes one output socket carry the signal imprinted with both the amp and speaker modelling while the other socket carries the signal imprinted with only the amp modelling. Mode S2, on the other hand, has one socket carrying the fully treated signal and one a buffered dry signal.
Bass V-Amp Effects
- MIDI Wah: MIDI-controllable wah-wah effect.
- P-Funk'n: an effect based on the Mutron III envelope filter.
- Auto Wah: LFO-controlled wah-wah effect.
- VCF+Flanger: filter and flanger effects.
- Delay+Chorus.
- Stereo Delay.
- Delay/Loop: delay with 15s sampling time and loop function.
- Reverb.
- Ambience: early reflections program.
- Voice Box: formant filter for vowel-like modulation.
- Ultrabass: sub-harmonic synthesizer effect.
- Rotary Cab.
- Phaser.
- Flanger.
- Chorus.
- Stereo Chorus.
- Synth: bass guitar synth effect with key intelligence and envelope control.
- MIDI Synth: entirely independent bass synth which you can trigger using MIDI Note messages.
Impressions
So how does it sound? Well, as with any effect, appeal is in the ear of the beholder, and while this particular beholder did wince at quite a few of the factory presets, many of which seemed well overcooked, the basic quality of the sounds the Bass V-amp can produce, and their variety, is impressive. I especially liked the way subtle down-stream effects worked with alternative amp and speaker models. A mild chorus and reverb on, say, the British '80s (for which read Trace Elliot) simulation produced the classic '80s fretless bass sound, while the same effect settings on say the Jazz Tone (a Polytone 101 bass combo model) resulted in a similar sound, but with a usefully different, and less clichéd, character. While the amp simulations are, like the preset effects, probably a little overdone, they do provide a foundation for a huge variety of sounds, and enable more subtle use of the multi-effects than would perhaps otherwise be the case.
On their own, too, without any effects, the amp and speaker simulations are fascinating and worthwhile. I remember in my youth occasionally hiring an old Fender Bassman 100 valve amp and a 1x15 cabinet. I loved the sound it made — wonderfully warm, yet with punch and clarity — and I never really achieved the same with any other backline.
Well, what do you know? After half an hour's tweaking of the Bass V-Amp's parameters, while I'm sure I didn't recreate the sound perfectly, I found one — the Ampeg B15 combo with a little extra mid-range and top — that really did seem to have something of the same character that I remember. Finding that sound, for me, makes the V-Amp worthwhile on its own, and says much about its versatility, so I'm sure I'll find a few other satisfying sounds too. I have a gig this evening, and I suspect I'll have this new toy staring up at me from the stage!
Cons
- Dreadful owner's manual.
- Bass players might feel cheated by guitar and keyboard effects.
- Overcooked preset sounds.
- No empty patch memory locations.
Summary
Don't expect to understand the Bass V-Amp from the moment you turn it on, or even after you've tried to read the manual. But persevere and you will find some inspiring bass guitar treatments.
information
£143 including VAT.
Behringer UK +49 2154 9206 6441.
7
ULTRABASS BB410 User Manual
Line Out L/R
ULTRABASS BB210
Output R
L (Low)
R (High/Mid)
Instrument In
Output L
EP2000
ULTRABASS BB115
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BASS V-AMP PRO
BASS V-AMP
Fig. 3.3: Bi-amping: high and low frequencies are separately reproduced by the bass cabinets
When using the BASS V-AMP or the BASS V-AMP PRO, you also have the option
of using bass cabinets in the bi-amping mode. With bi-amping, high and low
frequency ranges are split between different bass cabinets, so that the entire
sound spectrum is not simultaneously reproduced on all speakers. In fig. 3.3,
low-end signals are reproduced on the BB115, while the mids and the highs
are reproduced on the BB210. Splitting the frequency range requires an
active crossover.
The BASS V-AMP and the BASS V-AMP PRO already feature this function.
Here, the frequencies are split in such a way that the low-end signals are
reproduced on the left channel, and the mids and the highs are reproduced
on the right channel. How to make the necessary settings on the crossover
(X-OVER function) is explained in chapter 6.3 (post amp effects) in the
BASS V-AMP/BASS V-AMP PRO manual.
Instrument In
Analog Line Out
Output 2
Behringer V Amp Pro
Output 1
EP2000
ULTRABASS BB115
ULTRABASS BB115
Link
Link
ULTRABASS BB210
ULTRABASS BB210
BASS V-AMP PRO
Fig. 3.4: Expanded stereo configuration
This stereo setup is meant for all those who crave a saturated stereo sound.
Together with the BASS V-AMP or the BASS V-AMP PRO, stereo effects such as
Chorus or Delay come alive. Real stereo effects require two separate cabinets
set up to run in stereo. Our EUROPOWER EP2500 is perfect in the amplifier role.
Additionally, with its 2 x 1,200 Watts, it has the necessary headroom to truly rock.
This is the expansion of the setup shown in fig. 3.3. Instead of powering two
Behringer Bass V Amp Pro Manual
individual cabinets, the amp in fig. 3.4 powers each of the two stacks comprised
of the BB115 and the BB210 cabinets. The cabinets are connected to one another
using a link cable. Here, too, we recommend using only professional loudspeaker
cables (compatible with NEUTRIK SPEAKON).
4. Installation
Behringer Bass V Amp Pro User Manual Pdf
4.1 Speaker connector
When combining several speakers/cabinets, you should bear in mind the
resulting overall impedance. Here are some brief explanations about different
kinds of connections:
Serial connection: The individual impedance values of the connected speakers
are added up. If two 4-Ohm speakers are connected to one another, there is an
overall impedance value of 8 Ohms.
Parallel connection: If speaker/cabinets with identical impedance values are
connected in parallel, the overall nominal impedance is reversely proportional to
the number of speakers, e.g. if you connect two speakers/cabinets, the nominal
impedance is halved; if you connect three speakers/cabinets, the nominal
impedance is one third of the individual speakers’ impedance; with four speakers,
Behringer V Amp Pro Manual
it’s one quarter, and so on. For example, this way you can turn two 8-Ohm
systems into one 4-Ohm system.
Behringer Bass V Amp Pro
