422793

JBL everest dd66000 maple Manual

11
Zoom out
Zoom in
Previous page
1/42
Next page
Project Everest DD66000
11
CHAPTER 2
The Project Everest DD66000 Loudspeaker – a Triumph in Acoustics and
Technology
The following sections describe the primary features and components of the
Project Everest DD66000 loudspeaker system.
The basic system configuration is what JBL historically has referred to as an
augmented two-way. In the 1950s and 1960s, JBL primarily built two-way
systems with a 12- or 15-inch (305mm or 380mm) woofer crossed over to a
large-format compression driver/horn combination. Some of the systems would
be “augmented” by a UHF device, usually the 075 ring radiator which would
operate above 8kHz. These systems would have only a single crossover point in
the middle of the audio range, to minimize any sonic degradation caused by the
dividing network. The DD66000 has a single midrange crossover at 700Hz,
blending one 1501AL woofer to the 476Be compression driver and horn
combination. The 045Be-1 UHF driver is brought in at 20kHz to cover an
octave and a half of ultrasonic frequencies. A second 1501AL operates in the
bass frequency range from below 30Hz to around 150Hz, where it is rolled off
at a gradual 6dB/octave. The first-order slope ensures proper amplitude and
phase summing between the two woofers over their total operating range. Both
woofers operate below 150Hz, but only one of them extends up to the 700Hz
crossover point. This is done to achieve proper directivity control throughout
the entire woofer operating range, while delivering powerful and extended
low-frequency performance. Above 700Hz, the HF compression driver and
horn combination operates unassisted, all the way to 20kHz (Fig. 1).
Figure 1 – On-axis response of the DD66000 system and of each of the
transducers through its crossover network (2.83V @ 1m)
… 11 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for JBL everest dd66000 maple at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of JBL everest dd66000 maple in the language / languages: English as an attachment in your email.

The manual is 0,58 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info