JBL E120 全新 180欧 加运费。
A vintage JBL E120 speaker in 8 ohms. 300 watts, 50Hz – 6000Hz, 103db senitivity.
The E-120’s tone character maintains the traditional JBL sound-tight bass, crisp midrange, and brilliant highs.保持传统的JBL
声音特色,结实的低音，清晰的中音，辉煌高音。 It directly replaces conventional speakers used in guitar amplifiers, organs,electric pianos, or other applications.
The JBL E-120 12″ guitar speaker handles 300 watts RMS JBL’s most popular musical instrument loudspeaker Brilliant highs, crisp midrange and tight bass
This speaker replaces conventional speakers used in guitar amplifiers, organs, electric pianos or other applications.
There are three major differences between the JBL D and E series 120 12″ speakers. First is the magnet. The D has the ALNICO while the E has the larger and heavier ceramic. Second is the cone. The D series cone has a pleated paper surround ( some earlier models were smooth with no pleats ) while the E series has a Cloth surround. The third major difference is with te coil gap. The E series has a wider gap than the D and uses what is called “Field Focused Geometry” which was adapted from the K series. This focuses the magnetic field in a more uniform pattern around the voice coil. The D series power rating is 200W peak and 100W RMS with a SPL of around 100db. The E series handles 300W peak and 150W RMS with a SPL of 103db. There is also a difference in weight. The D-120 was about 14lbs. while the E-120 is 20lbs.
Most guitar players that I’ve talked to who are into vintage amps and sound tell me that they prefer a speaker with a paper surround…but being a keyboard player I can’t hear any difference betseen the paper or cloth.
Not entirely accurate here.
The voice coil gaps in the D120F, K120 and E120 are all the same… .057″
The E-Series has a higher flux density in the gap of 1.35T(13,500 gauss) due to the more powerful ceramic magnet that replaced the Alnico from the D/K Series which is 1.2T(12,000 gauss) . The E-Series is about 2dB more sensitive.
While some might prefer the D120F’s treated paper surround and it’s associated cone breakup, the K/E series “m-roll” surround yields better low frequency response and mechanical power handling as well as the ability to be a cleaner more versitile performer.
Every player that I’ve reconed an original D120F with the E120 recone kit has been thrilled with the results. Basically, it’s upgraded to a K120 with E120 power handling. Some guys have been intimidated by the beastly sensitivity of the E120…and the extra weight…but some have gotten used to it and other’s love it from the start. It can replace multiple 12’s of a lesser pedigree….and do it without complaint for….well…decades of service. What’s not to love? Turn the treble down a few notches and the high end can be tamed. Power rating is 300 watts pink noise in sealed/vented enclosure. 150 watts in open back.
Let’s bump this one ’cause edgewound brings up some good points here.
一般是要求Q值低，但也不是越低越好。
扬声器单元的品质因数Q是设计和和制作音箱前必须了解的一个很重要的参数。在扬声器单元的阻抗特性曲线上它表示阻抗曲线在谐振频率处阻抗峰的尖锐程度，它在一定的程度上反映了扬声器振动系统的阻尼状态。
扬声器单元的品质因数越高，谐振频率就越难控控制。扬声器的低频特性通常由扬声器单元的品质因数值和谐振频率决定，其中品质因数的大小与扬声器单元在谐振频率处输出的声压有关。
Q值过低时扬声器的输出声压还没有到F0处时就迅速的下降，扬声器处于过阻尼状态，造成低频衰减过大。
Q值过高时扬声器处于欠阻尼状态，低频得到过份的加强。Q值越大峰值越陡。
因此我们说扬声器的品质因数即不能过高也不能过低，通常取0.2~0.5为宜。
One more point that is rarely mentioned regarding the db rating on speakers is that every 3 db increase will be TWICE AS LOUD!. Therefore the JBL E120 with it’s 103 db output will walk all over almost every other speaker made. If I remember right it has the highest db rating of any of the usual guitar speaker choices. Yes – the E120 recone kit is a win – win for a D120.