Troels Gravesen W1500/97 monitor - diyAudio
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Old 9th March 2007, 12:38 PM   #1
fgroen is offline fgroen  Netherlands
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Default Troels Gravesen W1500/97 monitor

Hi guys,

Some time ago I completed the build of a pair of W1500/97 monitors, designed by Troels Gravesen.

I realised that some time ago, there was a thread asking for experiences regarding Troels Gravesen designs. Here's another experience...

I will report on this build in a couple of posts, with some pics of the process.

To start with, this is the website that contains the W1500/97 design.

I already shared my experiences with Troels, and that feedback can be read here.

Regarding my considerations: I chose the W1500/97 for aestetic reasons (symmetric lay-out of the units) and the fact, that the 2905/9700 tweeter is used.

Furthermore, I reduced baffle size to the minimum that was considered healthy by Troels. Hence, baffle size is 180mm x 290mm.

Since the internal volume needs to be 10,5 litres, the depth of the cabinet follows automatically. I also chose to have a separate cavity for the filter, in order to keep the internal volume to the correct value regardless of the filter. This also added to the depth of the cabinets.

So after purchasing cut-to size MDF panels the build could begin:

Click the image to open in full size.

Side, top, bottom and rear panels of the cabinets are lined with lead bitumen.

Click the image to open in full size.

Filter compartiment is clearly visible:
Click the image to open in full size.
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Old 9th March 2007, 12:58 PM   #2
fgroen is offline fgroen  Netherlands
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To make the cabinets neat and straight, I covered the top and bottom with 3mm MDF layers, the rear with 8mm MDF (also for the port flaring) and the front with 2mm aviation quality birch ply.

Click the image to open in full size.

Click the image to open in full size.

Next step was veneering. I obtained a two sheets of amazing pear wood veneer. It's a slightly warm red wood, with a purple flame in it. I chose to apply one sheet per cabinet, and veneer them in mirror image of each other.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

I used my preferred glueing method with PVAC glue and ironing it on after drying.
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Old 9th March 2007, 01:07 PM   #3
fgroen is offline fgroen  Netherlands
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Next step was cutting out all holes:

1: Port opening with flare:

Click the image to open in full size.
Click the image to open in full size.

2: Woofer opening with recess:
Click the image to open in full size.

3: Tweeter opening, also with recess:
Click the image to open in full size.

Fits nicely..
Click the image to open in full size.

4: Didn't make a picture of the filter compartiment per sť.
Will be visible later on.

I decided to order a pair of black perspex plates to cover the filter compartiment. It will give the speakers a nice look...
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Old 9th March 2007, 01:11 PM   #4
fgroen is offline fgroen  Netherlands
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The filter was built to precise spec of Troels. No other components, it's an exact copy.

Troels gave me the remark that the coils were a bit close together. However, I think they perform well.

Click the image to open in full size.

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Old 9th March 2007, 01:15 PM   #5
fgroen is offline fgroen  Netherlands
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Next step is oiling the cabinets for a nice finish.

I used Danish oil for a result.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

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Old 9th March 2007, 01:20 PM   #6
fgroen is offline fgroen  Netherlands
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Finally after mounting speaker, filters etc this is the result:

Click the image to open in full size.

Click the image to open in full size.

And the rear sides:
Click the image to open in full size.

They are in use in my living room. With 15x4 metres and a ceiling of 3,3 metres, it's quite a big room. However, these little speakers easily fill the entire space with music.
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Old 9th March 2007, 01:28 PM   #7
fgroen is offline fgroen  Netherlands
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So how do they sound?

I don't regret having built them. They are gorgeous little monsters. Bass is absolutely stunning. Compared to the original A4, I prefer this design by miles. They sound really homogenic, dynamic and have a kind of ease over them that is hard found.

They are not cheap, but definitely worth the money.

Also these speakers are quite sensitive to connected equipment, as can be read from my feed-back to Troels. Also speaker cables make a huge difference.

At the moment I run them with a Proceed PCD3 CD-player and a Densen Beat B100 integrated amp. That gives a nice match to my taste.

So if you're in doubt wether to build a Troels Gravesen design or not, I can clearly recommend at least this one. Since his taste definitely also defines the other designs he has published, I would not be hesitant to build another of his designs as well.
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Old 10th March 2007, 03:12 AM   #8
MadMutt is offline MadMutt  Australia
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Veeeery nice.
I'd be proud of those.

Would love more pics info on that bad boy in the back ground too..
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Old 10th March 2007, 03:47 AM   #9
Foxx510 is offline Foxx510  Australia
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Quote:
Originally posted by MadMutt

Would love more pics info on that bad boy in the back ground too.. [/B]
Check this thread...
High-end 3-way active Avalon look-alike
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Old 10th March 2007, 04:53 AM   #10
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Superb.

Your craftsmanship is second to none. You have given extreme attention to detail in all aspects of the build. The only thing better than great sounding loudspeakers are those with looks to match.

Thank you for sharing this excellent project.
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