Gleden Loudspeaker System - in English (Gleden -> Pleasure)

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Gleden Loudspeaker System - in English (Gleden -> Pleasure)

HozzászólásSzerző: pagrus » 2011.04.12. 16:08

This is shortened summary about Gleden.
(A more detailed description is available in Hungarian language: http://diyaudio.hu/forum/viewtopic.php?f=20&t=268 )

gleden_front.jpg
gleden_front.jpg (66.95 KiB) Megtekintve 4846 alkalommal.

Drivers: Vifa M17WH-09-08 & Peerless HDS 810921
Sensitivity: 91 dB @ 1 W - optimized for tube/valve amplifiers, the bass-midrange woofer has no crossover electronics (due to its natural frequency rolloff)

A suitable replacement of the Vifa M17WH-09-08 might be the ASE 18WN225-8 (by Scan-Speak). However, this configuration has not been tested, thus I recommend prototyping it.
A suitable replacement of the Peerless HDS 810921 might be the Scan-Speak D2608/913000 08 and ASE DT26/08 tweeters.

The size of the enclosure is 360 x 240 x 300 mm (net 17 liter plus reflextube) it is made of 18 mm plywood. A 25 mm bracing makes its sides stiffer, the bottom and top are covered with 4 mm Tecsound from the inside. Every box has 110 g filling of plastic quilt.
The woofer center is located 120 mm high from the bottom in the center, the tweeter center is located 100 mm from the top and 90 mm from one side. The reflex hole is at the back 120 mm from the top, in the center (sideways). The reflextube is made from Audyn BRT 50-145 tube with a final size of around 44-46 mm.

(http://www.audionl.hu/oscommerce/catalo ... cts_id=230)

leszabott-retegelt-lemez.jpg
leszabott-retegelt-lemez.jpg (164.46 KiB) Megtekintve 4846 alkalommal.

Sealing:

ragasztas.jpg
ragasztas.jpg (53.46 KiB) Megtekintve 4846 alkalommal.

The cabinets are drying. The surface is sanded with fine sandpaper after wiping the surface with a wet sponge and letting it dry. I used to do this whole procedure twice.

szalfelhuzas-utan-szaradas.jpg
szalfelhuzas-utan-szaradas.jpg (77.91 KiB) Megtekintve 4846 alkalommal.

The surface is prepared with Biopin hard oil. After it is dry again, the finish is a soft layer of Biopin hard wax. I used to hand buff it just before it is hardened for a nice, glossy surface.

kemenyolaj-utan-szaradas.jpg
kemenyolaj-utan-szaradas.jpg (228.66 KiB) Megtekintve 4846 alkalommal.
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pagrus
 
Hozzászólások: 3710
Csatlakozott: 2009.02.03. 01:01
Tartózkodási hely: Bánhida, Buda

Gleden Loudspeaker System

HozzászólásSzerző: pagrus » 2011.04.12. 16:13

Harmonic distortion of Vifa M17WH-09-08 (blue - THD, red - 2nd order, black - 3rd order):

M17WH-09-08-distortion.png
M17WH-09-08-distortion.png (8.38 KiB) Megtekintve 4844 alkalommal.

Harmonic distortion of Peerless HDS 810921 (blue - THD, red - 2nd order, black - 3rd order):

810921-distortion.png
810921-distortion.png (8.46 KiB) Megtekintve 4844 alkalommal.

Crossover (tuned to 5,9 kHz):

Gleden-x.jpg
Gleden-x.jpg (16.4 KiB) Megtekintve 4844 alkalommal.

Since the crossover is so simple, anyone can try tailoring it to his/her own taste, for example:
2,2 uF + 2,2 Ohm
or
1,8 uF + 100 uH
...

Frequency response:

Gleden-x-spl.png
Gleden-x-spl.png (7.25 KiB) Megtekintve 4844 alkalommal.

The speaker deserves precise location in the listening room, it is recommended to put it 40 cm away from the wall in an average room as a starting point.
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Hozzászólások: 3710
Csatlakozott: 2009.02.03. 01:01
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