JBL 7 Series vs. Genelec The Ones

[Dj7675]

Thanks.

Are all Genelec The Ones self-powered or can you get them with the amplifier being external to the speaker?

For a multichannel system such as an atmos theater, a better option would be the passive version of the JBL… 705i/708i. Just run speaker wire, dsp/amp in your rack/other room.

 

[Tom C]

So, running a PowerBridge is a safe DIY solution that the manufacturer says meets building code requirements in the USA. You can route the other cables along with the power line, too.

 

[Kain]

For a multichannel system such as an atmos theater, a better option would be the passive version of the JBL… 705i/708i. Just run speaker wire, dsp/amp in your rack/other room.

Thanks.

What if I don't have the ability to place the amps in another room? Will placing them in-room in a heavy-duty soundproof server rack be enough to suppress the fan noise?

 

[Trell]

Thanks.

What if I don't have the ability to place the amps in another room? Will placing them in-room in a heavy-duty soundproof server rack be enough to suppress the fan noise?

As long as the amps are cool enough in there.

 

[Kain]

As long as the amps are cool enough in there.

This is just an example but could something like this work for the amps to keep them cool while suppressing the fan noise? These are very expensive but note the heat dissipation and noise reduction specs.

Silent Server Racks and Noise Canceling Cabinets | Rackmount Solutions

When you need it to be quiet, these soundproof server racks and cabinets are just what you need. Visit Rackmount Solutions today to order one online.

www.rackmountsolutions.net

 

[Dj7675]

Thanks.

What if I don't have the ability to place the amps in another room? Will placing them in-room in a heavy-duty soundproof server rack be enough to suppress the fan noise?

There are basically 3 ways to EQ the speakers..
1-Crown amps such as DCI 300n 600n etc. These cannot be placed in room IMO as the fans are very loud
2-London BSS processor. These can be used and then you can use your own amps. There are several models (not familiar with all of them) such as BSS BLU-160 etc with the appropriate cards installed
3-Your Emotiva XMC-2 is capable of manual EQ. The EQ can be applied within a processor that offers manual EQ. There EQ settings can be found here at ASR and at AVSForum as well. This may not be a completely proper way to do it, but many seem to have and many seem to like the result just fine (YMMV)

 

[Kain]

There are basically 3 ways to EQ the speakers..
1-Crown amps such as DCI 300n 600n etc. These cannot be placed in room IMO as the fans are very loud
2-London BSS processor. These can be used and then you can use your own amps. There are several models (not familiar with all of them) such as BSS BLU-160 etc with the appropriate cards installed
3-Your Emotiva XMC-2 is capable of manual EQ. The EQ can be applied within a processor that offers manual EQ. There EQ settings can be found here at ASR and at AVSForum as well. This may not be a completely proper way to do it, but many seem to have and many seem to like the result just fine (YMMV)

If I go with the BSS processor + my own amps route over the Crown amps that are usually recommended with these speakers, will the audio performance be any worse in any way considering they were designed to be used with the Crown amps?

 

[Dj7675]

If I go with the BSS processor + my own amps route over the Crown amps that are usually recommended with these speakers, will the audio performance be any worse in any way considering they were designed to be used with the Crown amps?

BSS Processor … you download the speaker preset (you select single wire or bi-wire) for that channel and EQ is applied. What is interesting is the EQ of the amps and BSS processors appear to be a little different from what I recall. But I would say the BSS will be at least as good, you can pair it with a silent amp of your choice.
*both are officially supported solution by JBL/HARMAN

 

[Kain]

BSS Processor … you download the speaker preset (you select single wire or bi-wire) for that channel and EQ is applied. What is interesting is the EQ of the amps and BSS processors appear to be a little different from what I recall. But I would say the BSS will be at least as good, you can pair it with a silent amp of your choice.
*both are officially supported solution by JBL/HARMAN

Thanks.

Are there any fanless or very quiet subwoofer amps that have at least 1200 watts or more per channel that you could use with the JBL SSW-2 subwoofer?

SSW-2 | Dual 12” (300mm) Passive Subwoofer

The SSW-2 is a custom in-room/built-in subwoofer designed to complement any of the Synthesis Custom Loudspeakers (SCL Series). It features dual 12-inch (300mm) high-excursion cast-frame woofers in a heavily-braced, ported enclosure constructed from 1-inch MDF throughout, The SSW-2 delivers...

www.jblsynthesis.com

 

[Dj7675]

Thanks.

Are there any fanless or very quiet subwoofer amps that have at least 1200 watts or more per channel that you could use with the JBL SSW-2 subwoofer?

SSW-2 | Dual 12” (300mm) Passive Subwoofer

The SSW-2 is a custom in-room/built-in subwoofer designed to complement any of the Synthesis Custom Loudspeakers (SCL Series). It features dual 12-inch (300mm) high-excursion cast-frame woofers in a heavily-braced, ported enclosure constructed from 1-inch MDF throughout, The SSW-2 delivers...

www.jblsynthesis.com

I’m sure there are options, but I wouldn’t know all of them. I believe you can bridge 2 Hypex NC502 channels and get to 1200w. For example you could do a 4 channel NC502 for. L/R and a pair of NC502 channels bridged for the sub.

 

[AwesomeSauce2015]

If I go with the BSS processor + my own amps route over the Crown amps that are usually recommended with these speakers, will the audio performance be any worse in any way considering they were designed to be used with the Crown amps?

Theoretically, if you used good amps like the Hypex amps, you could surpass the crown performance.
However, you could also do worse if you don't get appropriately sized amps. I would recommend looking at what crown amps are recommended, and at least try to match the power output rating.

Alternatively, while I'm not familiar with whether this is possible, the JBL AVRs may have EQ for the 705/708 built in. If they support it, you could use one of them instead of your current processor.

Are there any fanless or very quiet subwoofer amps that have at least 1200 watts or more per channel that you could use with the JBL SSW-2 subwoofer?

With regards to subwoofer amps, if you want big power, then you're going to need a fan. I'd recommend getting one of the crown amps for that, and if noise is a big issue then maybe replace the fans with quieter (Noctua makes some good ones) fans, if you are comfortable taking it apart.
Alternatively, Hypex makes high power amps, and others also do, just ensure you have good ventilation.

 

[jhaider]

If I go with the BSS processor + my own amps route over the Crown amps that are usually recommended with these speakers, will the audio performance be any worse in any way considering they were designed to be used with the Crown amps?

7-series install were designed to be used with the Crown amps OR a BSS processor OR a JBL Intonato. Well I guess technically Intonato came later, so one could say it was designed to be used with the 7-series/M2 rather than the other way ‘round.

 

[Dj7675]

Alternatively, while I'm not familiar with whether this is possible, the JBL AVRs may have EQ for the 705/708 built in. If they support it, you could use one of them instead of your current processor.

JBL AVR/Processors do not include the EQ necessary (SDP-55 etc). The only exception is the JBL SDP-75 which is a tweaked version of a Trinnov Altitude.

 

[Kain]

Is it "safe" to replace the fans in Crown or other pro amps with quieter ones? I thought the stock fans that come with these amps are configured to work on a certain "fan speed curve" or something.

 

[NTK]

Is it "safe" to replace the fans in Crown or other pro amps with quieter ones? I thought the stock fans that come with these amps are configured to work on a certain "fan speed curve" or something.

A member has tried. Didn't report anything bad. So I'd assume it worked. Please see this thread:

Crown XTi1002 replacement fan

Hello, I recently purchased a Crown XTi1002 amplifier from eBay for use in my home theater. I have the amplifier being fed from the preouts from my Anthem MRX300 AVR whose power amp portion had started dying on me. I have the amplifier hooked up using RCA-XLR cables I found on Amazon. I have the...

www.audiosciencereview.com

 

[AwesomeSauce2015]

JBL AVR/Processors do not include the EQ necessary (SDP-55 etc). The only exception is the JBL SDP-75 which is a tweaked version of a Trinnov Altitude.

Interesting. You'd think JBL would include them in the non-trinnov rebranded one, to add significant value to them... But I guess not.

Is it "safe" to replace the fans in Crown or other pro amps with quieter ones? I thought the stock fans that come with these amps are configured to work on a certain "fan speed curve" or something.

If you care about your warranty, no, and if you have no electronics experience, also no. But realistically, a high-quality aftermarket fan will probably be better than whatever stock fan they have, so if you know what you are doing, it should be safe.
Fan curves are (usually) defined as temperature vs fan speed / PWM (or DC) duty cycle. If a replacement fan is more or less effective than the stock one at a given point, the fan curve will compensate by adjusting the fan speed.