September 18th, 2018, 7:30 pm
Cogito wrote:Tom,
I was specifically talking about the "horn loaded applications", other than that we basically agree on all the points you raise.
In horn loaded applications, cone area is not a critical factor of SPL as the output from the cone can be compressed to generate higher pressures to match that of larger cones and larger excursions.
Again, not quite correct. To get the volume and pressure you need for a given output at the mouth of the horn, if you decrease the cone area you have to increase the excursion. so cone area is important. It is just like in a transformer where the power transferred is the product of the voltage times the current, not just one of the values.
In regards to the excursions, larger excursions require firmer cones and larger mass. Laws of physics play a negative role on the sound quality of heavier mass, large excursions and larger diameter cones. As the mass increases, momentum increases which reduces the response of voice coil to the changes in electrical energy. It takes longer time to accelerate and decelerate. That is why large excursion and large mass sub woofers HT subwoofers are not deemed suitable music reproduction.
Larger cones do not necessarily require firmer cones and larger mass. You can have a large light cone but to achieve a low Fs you have to have a very compliant suspension. The VAS will then be higher requiring a larger volume. Also, heavier larger cones do not cause substandard performance. The ability of the driver to react to electrical signals can partially be inferred from the TS parameters, Qes, Qms, and Qts. Momentum can be offset by losses in the suspension and the ability of the motor strength to apply braking forces. Remember that the driver acts as both a motor and generator. The ability of the driver to respond to electrical signals is reflected in the frequency response of the driver. Having a moving mass that is higher just tends to reduce the efficiency of the driver although a stronger motor helps offset that.
September 18th, 2018, 9:10 pm
September 19th, 2018, 11:00 am
September 19th, 2018, 11:18 am
September 19th, 2018, 12:34 pm
Stuart Polansky wrote:You're wrong, but if you already knew that you "knew" the answer to your satisfaction, why did you ask the question?
September 19th, 2018, 12:47 pm
September 19th, 2018, 1:22 pm
September 19th, 2018, 6:41 pm
Cogito wrote:Walt,
My point is, there are several voicing features in Guitar Amps like reverbs, tone stacks, echos, equalizers etc. but none for Guitar woofers.
September 19th, 2018, 9:01 pm
SoundMods wrote:As I said -- you are looking for information about something that is not done. The guitar speakers simply have to produce a certain amount of output with the amplifier they're matched up with with decent power handling. The speakers are marketed direct to the guitar amp. manufacturers. The music production is a function of the driver in the box and the guitar amps. design.
For the most part the devil is in the details of the guitar itself. Strings, pick-up, body, fret spacing, bridge, and even the picks used. That's the domain of the musician. The guitar amps. are just a means to an end.
The horse is dead.
September 20th, 2018, 9:37 am
Roscoe Primrose wrote:SoundMods wrote:As I said -- you are looking for information about something that is not done. The guitar speakers simply have to produce a certain amount of output with the amplifier they're matched up with with decent power handling. The speakers are marketed direct to the guitar amp. manufacturers. The music production is a function of the driver in the box and the guitar amps. design.
For the most part the devil is in the details of the guitar itself. Strings, pick-up, body, fret spacing, bridge, and even the picks used. That's the domain of the musician. The guitar amps. are just a means to an end.
The horse is dead.
Ah, no, not exactly. Eminence sells thousands (probably 10s of thousands) of guitar speakers to players every year who are simply looking to change the sound of their amps. That's part of why they sell 31 different guitar speakers in the 12" size alone (and that doesn't count versions of the same model in different impedances, or custom speakers they sell directly to manufacturers that you and I can't buy). There's a HUGE market out there for guitar speakers that players are buying to "voice" their amps, Eminence is just one of many vendors in this market.
Roscoe