JBL 308P and 708P

[Fred11]

The wood is birch plywood.

[Defender]

I like your craftsmanship - its a pitty we cant compare really.

[springwood64]

The wood is birch plywood.

They look very nice. What grill are you using?

[Fred11]

Yes, a pitty, to find out wether if it gets less or more musical. If I get my hand on a second pair I would be able to compare.
Thank you. The grills are homemade. Bought som nylon-like speaker diy textil, cut the frame and stapled the textil onto the frame. Quite easy!
F

[El Mero Mero]

Birch plywood, Stringhyllor and LEGO. That is a really nice combination. With great music its an even better combination.

[matthias]

The plywood boxes look really nice.
Do you have any material between the inside of the boxes and the outside of the 308s?
Thanks

[Fred11]

Thanks, Matthias and El Maro!
Yes, LEGO, String and Lejonklou, all nice and important for a good life: )
I only glued it together, but probably better with some damping?
F

[Spannko]

I really like what you’ve done Fred11! As long as you use musically related evaluation criteria, you can only know more now than you knew then. If it’s not as good, go back and start again. If it’s better, try something else (wooden baffle/damping?) and see where that takes you!

[Defender]

I really like what you’ve done Fred11! As long as you use musically related evaluation criteria, you can only know more now than you knew then. If it’s not as good, go back and start again. If it’s better, try something else (wooden baffle/damping?) and see where that takes you!

has the performance of your JBL308 increased over time Spannko?

[Fred11]

Thank you, Spannko
That is good advise. Will try with my lp12 soon and see how the speakers are playing.
Atb
F

[lejonklou]

I have two stands which I will try. Both are not Linn ones. One is a Mission Stand which will be about 60cm high with spikes and the other is a B&W Stand which will be at around 63cm with spikes so I am in about the right range.
But yes if you dont mind and if its not to much hassle it would be great to know the hight of the Katan and Kan stands.

Kan stands on Skeet: 60.5 cm
Katan stands on Skeet: 66.5 cm

Kan stands have bottom spikes that can be adjusted a bit up and down. It's usually best to screw them in, so that the stands sit low.

Katan stands don't have much adjustment, as the spikes hit the bottom of the hole.

[Lego]

Thank you, Spannko
That is good advise. Will try with my lp12 soon and see how the speakers are playing.
Atb
F

Any chance of some clips Fred11,please?

The look really good!!

[Fred11]

Will do!

[Spannko]

I really like what you’ve done Fred11! As long as you use musically related evaluation criteria, you can only know more now than you knew then. If it’s not as good, go back and start again. If it’s better, try something else (wooden baffle/damping?) and see where that takes you!

has the performance of your JBL308 increased over time Spannko?

I haven’t tried them again, since discovering that the KDS/308 combo isn’t a good one, however I’m very tempted to follow F’s lead and build them into the TV cabinet!

[Fred11]

Sounds interesting!
F

[lindsayt]

Just finnished my 308 project. I have boxes them into plywood. They Play really well, even though I have a bad source right now (Apple tv-naim dac awaiting Källa). I have not compared systematically without boxes. I also have a Kikkin. They now feel like big Spendor speakers. I have also made the sideboard, but I am contemplating making a smaller sideboard and get some good stands for them. So it seems this is also a possibility with these cheap and excellent speakers.
F

That's a really nice job on the pywood boxes.
It looks very much like you have the skills to step up to making your own speakers - which is a great route to getting fantastic sounding speakers for the amount you'll spend on them.

Hopefully, with a bit of tweaking you'll be able to sort out the issues that are making them feel as mediocre as big Spendors...

[Defender]

I have two stands which I will try. Both are not Linn ones. One is a Mission Stand which will be about 60cm high with spikes and the other is a B&W Stand which will be at around 63cm with spikes so I am in about the right range.
But yes if you dont mind and if its not to much hassle it would be great to know the hight of the Katan and Kan stands.

Kan stands on Skeet: 60.5 cm
Katan stands on Skeet: 66.5 cm

Kan stands have bottom spikes that can be adjusted a bit up and down. It's usually best to screw them in, so that the stands sit low.

Katan stands don't have much adjustment, as the spikes hit the bottom of the hole.

thank you Fredrik this is very helpfull

I will need to get the lower ones of the stands (Mission Stands 60cm/5.8kg) running but one spike is missing.
I am currently at 62.5cm with the B@W stands which are also more heavy (7,4kg per stand) with a room hight of 2,50m.
The only thing which is optimized right now is the distance to the wall at 109mm. The distance between each loudspeaker with the short cables I have sounds best at 1,44m and that doesn’t sound like all what they can do. I am missing longer cables.

3 optimizations left which I hope brings them to another level:
1. lower height
2. more and optimized distance between each loudspeaker
3. cables without an RCA => XLR adapter

What I am missing is more on the hifi/sound side:
Although they sound really grown up and „big“ they also
- sound too polite - I am missing dynamic range/dynamics and the windows of volume where they sound really musical is only about 20-25dB on the Sagatun Monos starting at around green -5dB
- sometimes the midrange sounds hard
- there is not really depth and soundstage

But lets see I still have options to work on. But yes its clear they react very sensitive to proper installation.

[Lego]

Once you get rid of the adapters ,things will normalise Defender are you getting a faint hum from the woofer

[Fred11]

Just finnished my 308 project. I have boxes them into plywood. They Play really well, even though I have a bad source right now (Apple tv-naim dac awaiting Källa). I have not compared systematically without boxes. I also have a Kikkin. They now feel like big Spendor speakers. I have also made the sideboard, but I am contemplating making a smaller sideboard and get some good stands for them. So it seems this is also a possibility with these cheap and excellent speakers.
F

That's a really nice job on the pywood boxes.
It looks very much like you have the skills to step up to making your own speakers - which is a great route to getting fantastic sounding speakers for the amount you'll spend on them.

Hopefully, with a bit of tweaking you'll be able to sort out the issues that are making them feel as mediocre as big Spendors...

Thank you. When I mentioned Spendors it was more about the looks and not the sound. Tomorrow I will try them with my lp12 and start positioning.
F

[Fred11]

Hi! Here is a clip. I have never made Clips before, so I dont know about the quality. It sounds really good IRL, i feel. My Jern 12-Boazu paints a Little big picture from midrange and up, is more forward. The 308 has much deeper bass and has more depth. Musically the 308 plays beautifully and engaging, and draws you into the music. I use a lp12 with Adikt, Naim Aro, Kore, lingo 4, into Slpsik 7.1, Kikkkn 1.0 and 308. I should upgrade the Kikkin 2.2 probably.

[Fred11]

Can’t attach the iPhone clip. Any idea how?

[Defender]

Once you get rid of the adapters ,things will normalise Defender are you getting a faint hum from the woofer

yes there is faint hum from the woofer - not much but its there. There is more noise from the tweeter which I hear at the listening position - not a deal breaker but I would like it more without.
But your words about the adapter give me hope.

I have also only listened with the Akurate DS as source - so it might have the same issue the Klimax DS has with creating a ground loop as discussed.

[Lego]

Once you get rid of the adapters ,things will normalise Defender are you getting a faint hum from the woofer

yes there is faint hum from the woofer - not much but its there. There is more noise from the tweeter which I hear at the listening position - not a deal breaker but I would like it more without.
But your words about the adapter give me hope.

I have also only listened with the Akurate DS as source - so it might have the same issue the Klimax DS has with creating a ground loop as discussed.

That's definitely the adapters .When I used adapters the sound was terrible musically and there was a slight hum coming through the woofer ..There's always a slight hiss coming from the horn.

[markiteight]

Can’t attach the iPhone clip. Any idea how?

Unfortunately you can't just attach clips or images to a post. You have to upload the clips to a service like Dropbox, make the link to the clip sharable, and then post the URL in your message here. Send me a PM if you need further assistance.

-Moderator

[Lego]

I really like what you’ve done Fred11! As long as you use musically related evaluation criteria, you can only know more now than you knew then. If it’s not as good, go back and start again. If it’s better, try something else (wooden baffle/damping?) and see where that takes you!

has the performance of your JBL308 increased over time Spannko?

I haven’t tried them again, since discovering that the KDS/308 combo isn’t a good one, however I’m very tempted to follow F’s lead and build them into the TV cabinet!

Using JBL 308s without a preamp!? ...say it ain't so Spannko!