Cabinet: 2x10" or 1x15"?

[BigDaddyLoveHandles]

Thanks for the feedback, guys. Now is it really true that a 15" will be bassier than a pair of 10" speakers? I thought that was hearing with your eyes. The Emmince Legend 1518 has this response curve, which doesn't look dark or bassy.

[jorgemg1984]

My only experience is with EVs - the 15 Force is way bassier than the 10 Force the 12L.

[neatomic]

For the non-techs, cutting does not mean totally eliminating. A high-pass filter that cuts everything below a given frequency has two properties cutoff frequency and slope. If the cutoff frequency is 150Hz, that just means that 150 is 3db down. If the slope of the filter is 6db per octave, then at 75Hz (octave below 150) is 9db down. That is still very present in the sound, it's just turned down, not totally elliminated.

9db down at 75hz is considerable!! in audiophile terms that would be called falling off the cliff...bass frequencies are already more difficult to perceive

so basically that big beautiful jazzbox playing through a 10" speaker with a low end already only down to about 100hz...mic'd with a microphone that has its own low end roll off..and then shelve it at 150?..your luscious guitar is gonna sound like your playin through computer speakers

wes played through a standel with 15" for a reason

heres a good chart of fret frequencies




cheers

[Greentone]

I haven't found JBL and Electro-Voice speakers in the 15" configuration from the classic era to be particularly bassy. In fact, they have a pretty good top end.

More contemporary 15" drivers that are _designed_ for bass applications may seem bassy because they greatly attenuate the top end of the spectrum.

The old JBL D-130, the Electro-Voice SRO 15, or the Jensen P15N speakers from the 1960s all have a decent amount of treble extension and efficiency. They will sound quite full-range.

By comparison, an Eminence 15" driver in a sealed cabinet (say, a Polytone Mini Brute III or IV) _will_ sound pretty bassy in direct comparison to a Jensen P15N in an open-back Fender Vibroverb amp, or a JBL D130 in a Fender Showman amp in a cabinet with a tone ring.

Most _modern_ amps that use 15" drivers are bass amps that employ a special, heavy-duty driver in a tuned-port cabinet. These amps are designed to pump out gobs of the lowest frequencies of electric bass, at the expense of the highest overtones--they are handled by the horns in the small driver cabinet (multiple 8" plus horn tweeters or multiple 10" plus horn tweeters). Different applications entirely, but typically what most people are exposed to when they think 15" speakers.

[Hammertone]

I haven't found JBL and Electro-Voice speakers in the 15" configuration from the classic era to be particularly bassy. In fact, they have a pretty good top end….[ ]...
The old JBL D-130, the Electro-Voice SRO 15, or the Jensen P15N speakers from the 1960s all have a decent amount of treble extension and efficiency. They will sound quite full-range…..

Ahhh, the Electro-Voice 15" SRO AlNico speaker. My other, other favourite speaker. That Stone Age cab is deep enough so that the coffee can won't hang out the back of the cab. I don't have one but would love to get one if anyone has one available.

[jorgemg1984]

I haven't found JBL and Electro-Voice speakers in the 15" configuration from the classic era to be particularly bassy. In fact, they have a pretty good top end.

More contemporary 15" drivers that are _designed_ for bass applications may seem bassy because they greatly attenuate the top end of the spectrum.

The old JBL D-130, the Electro-Voice SRO 15, or the Jensen P15N speakers from the 1960s all have a decent amount of treble extension and efficiency. They will sound quite full-range.

By comparison, an Eminence 15" driver in a sealed cabinet (say, a Polytone Mini Brute III or IV) _will_ sound pretty bassy in direct comparison to a Jensen P15N in an open-back Fender Vibroverb amp, or a JBL D130 in a Fender Showman amp in a cabinet with a tone ring.

Most _modern_ amps that use 15" drivers are bass amps that employ a special, heavy-duty driver in a tuned-port cabinet. These amps are designed to pump out gobs of the lowest frequencies of electric bass, at the expense of the highest overtones--they are handled by the horns in the small driver cabinet (multiple 8" plus horn tweeters or multiple 10" plus horn tweeters). Different applications entirely, but typically what most people are exposed to when they think 15" speakers.

Greentone by bassier I mean more bass not less treble. My 15 EV Force has plenty of treble but the bass is a lot more overwhelming then a EVM12L. My experience, of course.

[Patriots2006]

Maybe Roland did a twin ten "Jazz Chorus" for a reason?

33 lbs weight.

Roland JC-40 Jazz Chorus Stereo 40W 2x10" Amp | Sweetwater.com

I have the JC90 but the speakers fart horribly on the low end if I put the volume past 5 with my Strat. If I use the 335 it is even lower. It has the stock Roland speakers. thinking of replacing the amp. Not sure just yet.

[neatomic]

the original jc-120 speakers were rolands take on the jbl e120...ceramic mag, efficient, clean/rugged and fairly transparent..metal dust cap


in this day and age with all the wonderful vintage style reissue speakers, i'd think a speaker upgrade would benefit just about any vintage roland amp...


cheers

[Patriots2006]

Any suggestions? I know nothing about speakers and matching cabinets.

[neatomic]

apparently (someone please correct if incorrect) the jc 90 runs two 16 ohm speakers in parallel..for an 8 ohm load...if you stuck with that formula...this would be a good cheaper alt...very efficient ie loud!, yet capable of handling power so cleans will remain clean...

for info sake only..(tho parts express is a good outfit)..but i haven't checked for best price


Eminence Legend 10516 10" Guitar Speaker 75W 16 Ohm


also the way the jc's are set up..one speaker gets the original dry signal and the other the chorus effect..so you could theoretically try one of these for the original signal and see how it sounds like that


cheers

[kenbennett]

9db down at 75hz is considerable!! in audiophile terms that would be called falling off the cliff...bass frequencies are already more difficult to perceive

so basically that big beautiful jazzbox playing through a 10" speaker with a low end already only down to about 100hz...mic'd with a microphone that has its own low end roll off..and then shelve it at 150?..your luscious guitar is gonna sound like your playin through computer speakers

wes played through a standel with 15" for a reason

heres a good chart of fret frequencies




cheers

That's absolutely true if we're starting from flat as the audiophile does with full-bandwidth, well-balanced program material. The guitar/amp combination can be all over the place. When I got my Fender HotRod Deluxe it had so much bass that you couldn't dial enough out to get a balanced sound. I had to mod the tone stack so you can turn the bass all the way off if necessary.

The audiophile starts with great sounding recorded material, so knocking 9db out of any part of it would mess it up. But taking 9db out of the bass end of a guitar amp might be just what it needs.