Amp mystery

[EastwoodMike]

Fuchs ODH. 2,5kg, Tube pre and tube limiter. Sounds amazing clean and overdriven. 150-300 watts depending on the speaker you choose to use.

It really does the Robben Ford Thing and the cleans are great!

this looks very interesting indeed.
ODH (C) Hybrid | Fuchs Audio Direct

[Pinner]

this looks very interesting indeed.
ODH (C) Hybrid | Fuchs Audio Direct

If interested I did a few demos of this amp including some with my archtop.
https://www.youtube.com/playlist?lis...U_HMweb3DXg0FH

[pauln]

Small speakers playing bass frequencies have to use a lot of excursion (the speaker cone needs to move back and forth a good distance, sometimes called "long throw", similar to subwoofers). This works fine for basses because typically only one fundamental frequency is played at a time.

When a speaker uses high excursion, polyphony will induce modulation distortion (the higher frequencies are "wiggled" (modulated) by the lower frequencies, which via cyclic Doppler effects produces upper and lower sidebands (frequencies that are not harmonically related to the original signal).

I can see why the manufacturer might not want to encourage guitarists by adding reverb... "...adding a reverb chip would be possible, but the company doesn't want to blur its bass-only identity" sounds like the marketing version of saying bass sounds would be clean and clear, but polyphony would not if played too loud - not recommended for guitar... It might in fact be fine for modest levels suitable for more intimate jazz situations.

[Gitterbug]

I'm basically talking about amp heads, not speakers. However, several lightweight Neo woofers, like Celestion's BN10 and BN12 versions, Eminence's Basslites, plus many others I haven't tried (by B&C, Faital etc.) are actually short-excursion crosses between guitar and bass speakers, extending to 3.5-4 kHz. They may lack the earth-shattering bottom-end punch of real heavy-duty woofers but project the low fundamental frequencies clearly from 45-50 Hz up. These are suited for guitar use. I also want to point out that there's life outside the stated "usable range" of a speaker. This is a HiFi concept referring to the near-flat area of the frequency range. A guitarist familiar with the instrument and gear will intuitively adjust to the volume drop at both ends of the scale (or a guitar speaker's hills and valleys within.)

Modern bass styles do present a challenge for amp and cab makers. The Darkglass MT 200's eq shelves are revealing: bass 80 Hz, low middle 1 kHz (4-5 -string bass guitar fundamentals stop at 400 Hz), high middle at 3 kHz and treble at 5 kHz. I was told this is because of the need to adjust the overdrive content of the signal. If there were to be a guitar version with a four-band eq and no overdrive, low middle should be around 250-300 Hz, where the balance between nasal honk and warmth resides.

The broad frequency dispersion speaks for a tweeter for the trebles of course. However, I gather that coaxial/FRFR speakers are of increasing interest for bassists using modeling gear.

[RJVB]

(4-5 -string bass guitar fundamentals stop at 400 Hz)

Can you explain? The (fundamental of the) concert A is 440Hz (open 2nd string of a violin); the 5th string of a regular guitar in standard tuning is thus at 110Hz (2 octaves below the concert A).

[supersoul]

Can you explain? The (fundamental of the) concert A is 440Hz (open 2nd string of a violin); the 5th string of a regular guitar in standard tuning is thus at 110Hz (2 octaves below the concert A).

bass guitar is an octave lower, so the low A is 55hz.
Low E is 42hz (off the top of my head), assume three octaves, the highest E is 336hz

[RJVB]

OK, so I just didn't get the fact you meant the frequency of the highest open string. Sorry for the noise.