AVS Forum banner

1 - 20 of 3205 Posts

·
Registered
Joined
·
168 Posts
Discussion Starter #1 (Edited)
JBL 705i/708i (7 Series Master Reference Monitors): Jan 2015

Adam Savage said:
For the eight-inch two-way 708i and five-inch two-way 705i installed monitors, JBL developed a new miniature high-frequency transducer, the 2409H, featuring the manufacturer’s low-mass, annular diaphragm design, which was built to allow very high output with low distortion and high frequency response to 35kHz. JBL also engineered two new high-excursion five-inch and eight-inch woofers, the 725G and 728G, enabling the speakers to deliver robust low-frequency output into the 30Hz range...

To reduce enclosure size and installation cost, the speakers are centrally powered by Crown DCi 8|300N eight- and four-channel power amplifiers. The 705i and 708i can be driven by a single amp channel or bi-amplified. For greater accuracy and room-to-room consistency, BSS Soundweb London's signal processor provides speaker tuning, room EQ, and bass management. The processor accepts 16 or more analogue and AES/EBU inputs, and networks with the power amps via CAT5. The entire system can be externally controlled with HiQnet Audio Architect software, a hardware controller, or wireless tablet.
http://www.audioprointernational.co...ases-7-series-master-reference-monitors/07573

Data Sheet:

http://www.jblpro.com/ProductAttachments/7Series_Datasheet_101514.pdf

5":

Frequency Response -1.5 dB @ 48 – 23kHz
Frequency Range 39Hz – 36 kHz
Max SPL (80 Hz - 20 kHz) >101 dB SPL / 1m
Maximum Peak SPL (80 Hz - 20 kHz) >107 dB SPL / 1m
http://www.jblpro.com/www/products/recording-broadcast/7-series/lsr705i#Specs

8":

Frequency Response -1.5 dB @ 45 – 23kHz
Frequency Range 35Hz – 36 kHz
Max SPL (80 Hz - 20 kHz) >108 dB SPL / 1m
Maximum Peak SPL (80 Hz - 20 kHz) >114 dB SPL / 1m
 

·
Registered
Joined
·
635 Posts
I was excited for a quick moment until I found out that the 7 series would be passive and not active monitors.. Come on JBL, create a LSR 708p (p for powered)
 

·
Registered
Joined
·
8,937 Posts
Aha. I think I will have to wait for these. It appears they are the first models designed to be a timbre match for the M2's. I was wondering when they would get these out the door - and here they are. I wonder what the waveguide dispersion is?

I just ordered some SCS8's, but I think I might return them.
 

·
Registered
Joined
·
406 Posts
Note that the 725G/728G refer to the low frequency drivers in the 705i and 708i respectively. They are not subs are mentioned in the thread title.
 

·
Registered
Joined
·
168 Posts
Discussion Starter #8
Note that the 725G/728G refer to the low frequency drivers in the 705i and 708i respectively. They are not subs are mentioned in the thread title.
Ah, poor reading comprehension on my part! Thanks for pointing this out, @Zzzzz... . Could @markrubin or one of the other moderators edit my thread title, please? Cheers.
 

·
Registered
Joined
·
168 Posts
Discussion Starter #9

·
Registered
Joined
·
406 Posts
Looks like these can now be purchased:

www.performanceaudio.com/shop/JBL/LSR-7-Series-826/

It's interesting that they can be purchased individually rather than as a system.

Perhaps the most interesting new info, hearsay at this stage, is that they measure even better than the M2's :eek::eek::eek::eek: Not sure how that is possible :D Probably the differences are minor but it looks like these could indeed be a very nice option if you don't need the SPL produced by the M2's.

www.audioheritage.org/vbulletin/showthread.php?36228-New-LSR-7-series-708&p=369867&viewfull=1#post369867
 

·
Registered
Joined
·
3,057 Posts
A little titbit, Scott Wilkinson recently got to hear an Atmos setup consisting of 7 series speakers (see the 4th photo and accompanying info):

http://www.avsforum.com/forum/286-l...57-nile-rodgers-honored-pre-grammy-party.html


3 series monitors were also being used in another demo.
In Studio D, the Dolby Atmos system used JBL's new 2-way 7-series speakers in a 7.1.4 configuration, with pairs of left and right side surrounds playing the same signal.
That statement sounds like 5.1.4 with array of surrounds instead of 7.1.4 :confused:
 

·
Registered
Joined
·
407 Posts
I assume these have "normal" passive crossovers and can be used with usual AV Receivers...
 

·
Registered
Joined
·
406 Posts
I assume these have "normal" passive crossovers and can be used with usual AV Receivers...
Yes.

"The 705i and 708i can be driven by a single amp channel or bi-amplified. For greater accuracy and room-to-room consistency, HARMAN’s BSS Soundweb London signal processor provides speaker tuning, room EQ, and bass management."

The above however suggests that to get the most out of them, the Harmon processor would be required to tweak their anechoic response (like with the M2s). I don't know if that is the case or not. It depends on what exactly they mean by "speaker tuning." So far the info provided by JBL has been pretty limited.
 

·
Registered
Joined
·
407 Posts
I guess no measurements out yet....
 

·
Registered
Joined
·
407 Posts
Though no 3rd party measurements were seen for the earlier 63xx series....
 
1 - 20 of 3205 Posts
Top