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Chris661's PA system thread
Chris661's PA system thread
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Old 22nd March 2018, 10:01 AM   #91
chris661 is offline chris661  United Kingdom
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First gig with the little speakers last night.

Setup was this:
2x little speakers
2x 8" coaxial monitors
1x Behringer NU4-6000, running one channel per speaker
QSC TM16 desk, EV mics, etc etc. Processing at the desk was 60Hz highpass filter, +3dB at 20kHz.

Acoustic music plus some spoken word stuff - open mic night at a regular venue.
The stage in this particular pub is on the corner of an L-shape, so it was one speaker firing along each length.

They did well. Nudged the red lights once or twice during the gig (and was asked to turn it down when it got that loud), but they sounded good and filled the space nicely. I was rather hoping someone would bring a cajon or something with some low end, but it wasn't to be this time.
No obvious signs of nastiness when they got loud, and no trouble with feedback, either, which was a concern given the small cabinets.


Click the image to open in full size.

Click the image to open in full size.

Rather pleased with these. Today, they're going to see use as fills/delays with the bigger PA system (2x10" tops, 15" subs).

Chris
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Old 22nd March 2018, 10:24 AM   #92
jazbo8 is offline jazbo8
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Chris661's PA system thread
Chris - you may want to upload your pictures directly to the Forum for future prosperity, e.g., all the Photobucket links are now dead and the photos are missing.
How to attach images to your posts.
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Old 22nd March 2018, 10:34 AM   #93
chris661 is offline chris661  United Kingdom
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Quote:
Originally Posted by jazbo8 View Post
Chris - you may want to upload your pictures directly to the Forum for future prosperity, e.g., all the Photobucket links are now dead and the photos are missing.
How to attach images to your posts.
Hi,

Yeah, I noticed Photobucket ate the old ones.
These days I'm uploading to my own website and linking across - should be reliable for years to come.

Chris
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Old 23rd March 2018, 10:10 AM   #94
chris661 is offline chris661  United Kingdom
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Back again. Yesterday was the second gig for the little speakers. This time, I took them for fill usage in a difficult room.

Program material was mostly spoken word, but they also had dancers. Venue was an Indian restaurant in Sheffield city centre. Everyone was very pleased with the sound, so I'm optimistic about getting more work there.


Main PA covered the length of the room quite well, even in a further seating area that held another 50 or so people. I had wanted to put a speaker in the far seating area, but the areas immediately to the side of the stage needed more attention.

Click the image to open in full size.

Then the little speakers came in to fill in the areas to the sides/rear.
Click the image to open in full size.

Click the image to open in full size.

Again, they did a good job. That time was more about bringing clarity to the other seats, while the main PA carried most of the work.

So yes, I rather like these. They're back in the lounge playing music again.

Chris
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Old 26th March 2018, 08:27 AM   #95
chris661 is offline chris661  United Kingdom
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Didn't take any pictures, but they were used last Saturday at the same pub. I was hoping for a band, but it was a singer/guitar act again.

This time, the amplifier was an Ecler DPA2000, which puts out around 500w/ch into 8ohm. Didn't see clipping this time, but it's one of those class H amps with a big ol' transformer in the middle, so in the interest of keeping my amp racks reasonably light, I won't be using that again. Perhaps the MA12000i...

Chris
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Old 15th April 2018, 10:32 PM   #96
chris661 is offline chris661  United Kingdom
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Another update - 4-piece band - bass, acoustic guitar, violin, cajon/sax. Everything mic'd or DI'd, in the venue shown further up the page.
Just the 6.5" tops again, plus a couple of 8" monitors.

Did the job nicely, on the NU4-6000. Loud enough for a moderate Saturday night, and enough grunt to feel the bass from the cajon if you're near the speakers.

Really pleased with these little boxes. The 3x6" subs are on their way, though.

Chris
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Old 16th April 2018, 12:06 AM   #97
JMFahey is offline JMFahey  Argentina
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Congratulations.
Look very good and I must trust you about the sound
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Old 16th April 2018, 03:59 AM   #98
Cableaddict is offline Cableaddict
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Love the look of the stained (oiled?) cabinets!


Reminds me of my old Bag End TA-12C's.

Ah.... youth.
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Old 16th April 2018, 07:43 AM   #99
chris661 is offline chris661  United Kingdom
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Quote:
Originally Posted by JMFahey View Post
Congratulations.
Look very good and I must trust you about the sound
Thanks!
Still need to get outside for some proper measurements - I much prefer graphs to audiophile-speak.
I tried to get a short video, but the mic on my phone was clipping, showing in excess of 100dB when within a few metres of the speakers.

Quote:
Originally Posted by Cableaddict View Post
Love the look of the stained (oiled?) cabinets!


Reminds me of my old Bag End TA-12C's.

Ah.... youth.
Stained - rosewood stain straight on to the ply. Nice and easy to do, touch-up is simple, and it's a good way of standing out in a crowded market.

Cheers, all.

General update:
It's been a busy couple of weeks, including a musical at a theatre for a week followed by a big-name artist, but I'm hoping to have some time this week to take the newly-constructed 3x6" sub and a 1x6" top outside for some measurements. I'll be testing how well they integrate together using just the mixing desk (QSC TM16) output processing (3rd order filters plus parametric EQs). I'd really like it if I could use the desk and a four-channel amplifier to do all the work for a pair of tops, pair of subs, and a monitor mix.

Photo from the big-name gig:
Click the image to open in full size.

Chris
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Old 20th April 2018, 08:21 AM   #100
chris661 is offline chris661  United Kingdom
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The saga continues...

I've had a thread discussing the 3x6" bass module running in the Subwoofers forum for a little while, but here's the tail end of it, after the design choices had been made:
Small PA Subwoofer - 3x 6.5" drivers.

Here's a quick run-down of the 3x6's performance:

- 117dB maximum output before excessive compression and distortion
- Flat to around 55Hz with some EQ.
- Dimensions: 220mm height, 570mm square on top.
- Crossover: 170Hz

Click the image to open in full size.

There's a few things left to do to get it usable as a complete PA system:
- Finish first 3x6 cabinet
- Build second 3x6 cabinet
- Buy some longer speaker poles
- Patch panel for the amplifier

With regards to amplification for this system, here's the plan:
- NU4-6000:
Ch1 - Main left
Ch2 - Main right
Ch3 - Both subwoofers
Ch4 - monitor(s)

I'll need to make up a patch panel, as the subs take a 4-pole input and pass the mid-high signal out.

Processing will be done in the QSC desk, using an Aux send for the sub feed.

The primary use case for this PA system will be gigs with acoustic instruments, spoken word, and smaller parties.

Chris
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