JBL 308P and 708P

[jajo]

There doesn't appear to be any easy way to attach grills to them?

I guess one could make a "sock" like the ones for Linn 500-series. :-)

[Lego]

There doesn't appear to be any easy way to attach grills to them? They are the sort of speaker that look as though they'd look better with grills on.

Is there any domestically acceptable way in which you could move your turntable well away from the speakers?
Having the LP12 on a floor mounted stand next to the speaker stand seems to be a recipe for increased unwanted vibration in your turntable. Even if you have a solid concrete floor.

When I've experimented with moving my turntable from close to speakers to the far corner of the room it has resulted in the sort of upgrade in sound that was equivalent to a significant upgrade in component quality.

You've no taste LindsayTParty they look absolutely fabulous to these eyes as I've always wanted Saras visually and the 308s kind of give me a similar feel.

I have my turntable and preamp to one side of my speakers,but I would definitely try them in between speakers in order to compare shorter interconnects.Do you have a particular recommendation for interconnect length?

[Azazello]

Haha, I should pickup YOUR STANDS? ;)

Ah I thought you wanted to borrow them.

You’d have to modify them though.

[Azazello]

I guess one could make a "sock" like the ones for Linn 500-series. :-)

The old classic sock. Your ex girlfriend liked them from what I’ve heard?

[John]

I like how the JBL’s look without grilles and would imagine they were designed that way. I like how my DMT-15’s look with the grilles off but keep them on my ATC-SCM 7’s as they look better.

[Discodave]

I have on 109 stands. Silver. Black would probably be better.

Hopefully get time to work on clips tomorrow and you can see from them.

Will be interested to see & hear them. Thanks in advance.

Folks clips are now in the Practical Playground thread. Cheers

[Discodave]

JBL Photos, LPs used in clips, etc.

https://www.dropbox.com/s/xajxlqc5bwa8f ... 3.jpg?dl=0

https://www.dropbox.com/s/90dkp1kgt03sp ... 7.jpg?dl=0

https://www.dropbox.com/s/91o05n3pzhvn2 ... 7.jpg?dl=0

https://www.dropbox.com/s/ect22dvsr96hv ... 9.jpg?dl=0

:)

[lindsayt]

You've no taste LindsayTParty they look absolutely fabulous to these eyes as I've always wanted Saras visually and the 308s kind of give me a similar feel.

I have my turntable and preamp to one side of my speakers,but I would definitely try them in between speakers in order to compare shorter interconnects.Do you have a particular recommendation for interconnect length?

I suppose the looks are a highly subjective and personal thing. Some people like their speakers naked, some prefer clothed.

For the connection between cartridge and phono amplification my preference is to keep that short. Because it's such a mind boggling small amount of electricity generated by an MC cartridge.
From there I keep interconnects with RCA connectors short, because why not? It's easy to keep sources and amplification close together. For balanced connections I've tried some long interconnects that have sounded fine.

Generally it's a convenience thing. Having the turntable next to the system volume control.

I have long power amp to speakers cables. Typically 9 metres long. In the tests I've done so far, different speaker cables have made small tonal differences and no difference to the tunefulness of the system. Although to be honest, I've not tried a lot of different cables. So I've got an open mind that there might be a mega cable out there that would make a tuneful difference to the thick multi strand copper (or copper coated?) cheapo ebayed speaker cables that I currently use.

With turntables I've found mechanical factors to be far more important than cable factors. Any loss in sound quality from going from 2 metre to 9 metre speaker cables has been by far outweighed by the reduction in vibration reaching the turntable simply by placing it as far away as conveniently possible from the speakers. It's one of those things that I strongly recommend anyone to try - where they conveniently can. Turntable positioning is one of those things that's nearly free to try and can make a significant improvement to the sound. The sort where if you spent thousands of euros on the same improvement you'd be happy.

Placing the turntable in a different room to the speakers is a good sonic solution, but a bit of a pain when it comes to changing the record. A reasonable compromise is making sure that the turntable stand isn't anywhere near being on the same floorboard nor joist as either of the speakers.

[FairPlayMotty]

Some people like their speakers naked, some prefer clothed.

For me grill(e)s are useful only for cooking :)

Back to the JBLs, after watching an interview with the 82 year old Floyd Toole I ordered a JBL LSR 310s. Despite some hearing loss and life's ups and downs Floyd retains a razor sharp mind and the ability to enthuse about the music. I look forward to the new kit arriving and listening to a system with two subwoofers in situ for the first time. The rise of omicron may have restricted the festive season but it hasn't got in the way of musical bliss.

On a side note, I performed a little over enthusiastic tidying of the cabling of my primary and secondary systems. I managed to create hum on both systems. Separating out the components carefully and using European mains leads for the JBLs quickly removed all hum - aside from me humming along to the music.

[Nature]

Back to the JBLs, after watching an interview with the 82 year old Floyd Toole I ordered a JBL LSR 310s.

Interesting. Looking forward to read your opinion on its performance. It has been on my 'buy list' for over two years now. Right now I have some information about how good it is.

[Discodave]

Cheers Monty, will give this a go :)

[lindsayt]

Some people like their speakers naked, some prefer clothed.

For me grill(e)s are useful only for cooking :)

Back to the JBLs, after watching an interview with the 82 year old Floyd Toole I ordered a JBL LSR 310s. Despite some hearing loss and life's ups and downs Floyd retains a razor sharp mind and the ability to enthuse about the music. I look forward to the new kit arriving and listening to a system with two subwoofers in situ for the first time. The rise of omicron may have restricted the festive season but it hasn't got in the way of musical bliss.

On a side note, I performed a little over enthusiastic tidying of the cabling of my primary and secondary systems. I managed to create hum on both systems. Separating out the components carefully and using European mains leads for the JBLs quickly removed all hum - aside from me humming along to the music.

Looks like today was JBL woofer buying day.

I bought a pair of used JBL 2241's today. I'll be collecting these 18" woofers tomorrow.
I intend trying them in homemade braced sealed plywood cabinets and then tweaking them from there...

[tokenbrit]

JBL Photos...

https://www.dropbox.com/s/ect22dvsr96hv ... 9.jpg?dl=0

:)

I meant to say thank you for posting these then forgot in the build up to Christmas... Thanks & happy holidays.

[Lego]

Just experienced another JBL 308 moment .
I've been listening to Sarah Vaughan Brazilian Romance album for years and this is the first time I've realised/felt but don't know for sure that she's reading the score as she sings,uncanny .

[Spannko]

Just experienced another JBL 308 moment .
I've been listening to Sarah Vaughan Brazilian Romance album for years and this is the first time I've realised/felt but don't know for sure that she's reading the score as she sings,uncanny .

What if she’s not reading the lyrics but 308’s are just making her sound as though she is?

[Lego]

Just experienced another JBL 308 moment .
I've been listening to Sarah Vaughan Brazilian Romance album for years and this is the first time I've realised/felt but don't know for sure that she's reading the score as she sings,uncanny .

What if she’s not reading the lyrics but 308’s are just making her sound as though she is?

Yes Spannko what if?

[FairPlayMotty]

The JBL LSR 310s arrived as scheduled. I'm experimenting with the configurations.
The main options are:

1. preamp (tape out) > 310s > 308P.
2. preamp (tape out) > 310s plus preamp line out >308P.

Both options sound very musical. The 310s uses the same ADC chip but a slightly different codec chip (CS5341 ADC, ST STA309A codec). It's remarkable in the first option set up how many DAC and ADC/DAC stages the signal goes through but remains wonderfully musical.

Adding the second subwoofer needs the WiFi transmitter/receiver which is on the way.

Over the festive period I tried a number of preamps that I either owned or had on trial. This involved (for a couple) using the 308s without a subwoofer. Once you've used a good subwoofer with these speakers taking it away is not a viable option. I'm really looking forward to adding the second subwoofer :)

I did try outputting from my DAC to the 310s then to the 308P. That sounds awful - the timing of the music goes awry. It's especially obvious with the drums and bass guitar, they sound like they're playing along to a different tune.

[jajo]

The JBL LSR 310s arrived as scheduled. I'm experimenting with the configurations.
The main options are:

1. preamp (tape out) > 310s > 308P.
2. preamp (tape out) > 310s plus preamp line out >308P.

Both options sound very musical. The 310s uses the same ADC chip but a slightly different codec chip (CS5341 ADC, ST STA309A codec). It's remarkable in the first option set up how many DAC and ADC/DAC stages the signal goes through but remains wonderfully musical.

Adding the second subwoofer needs the WiFi transmitter/receiver which is on the way.

Over the festive period I tried a number of preamps that I either owned or had on trial. This involved (for a couple) using the 308s without a subwoofer. Once you've used a good subwoofer with these speakers taking it away is not a viable option. I'm really looking forward to adding the second subwoofer :)

I did try outputting from my DAC to the 310s then to the 308P. That sounds awful - the timing of the music goes awry. It's especially obvious with the drums and bass guitar, they sound like they're playing along to a different tune.

Why use tape out? That has fixed volume, right? Does that mean that you play the subwoofer on the same level regardless of the volume of the 308P?

3. Preamp line out -> 310S -> 308P

is the way I would connect it.

[FairPlayMotty]

Why use tape out? That has fixed volume, right? Does that mean that you play the subwoofer on the same level regardless of the volume of the 308P?

3. Preamp line out -> 310S -> 308P

is the way I would connect it.

I tried your suggestion first and got no signal passing from the 310S to the 308P. I'll try it again. The disadvantage of tape out is indeed that the preamp goes out of the equation as a volume control.

[jajo]

Why use tape out? That has fixed volume, right? Does that mean that you play the subwoofer on the same level regardless of the volume of the 308P?

3. Preamp line out -> 310S -> 308P

is the way I would connect it.

I tried your suggestion first and got no signal passing from the 310S to the 308P. I'll try it again. The disadvantage of tape out is indeed that the preamp goes out of the equation as a volume control.

310S passing signal or not should not have anything to do with which connections you are using on the pre-amp.

If it works when you are using tape out, it should work when you are using line out unless there is a fault in your pre-amp (the line-outs are completely dead).

[FairPlayMotty]

310S passing signal or not should not have anything to do with which connections you are using on the pre-amp.

If it works when you are using tape out, it should work when you are using line out unless there is a fault in your pre-amp (the line-outs are completely dead).

That was my assumption too - more testing going on :) My other subwoofer needs to have zero gain from the preamp.

[FairPlayMotty]

That's better.

Adjusting the volume manually was close to giving me exercise :)

[Defender]

FairPlayMotty not that it is of relevance but of interest do you know which ADC and DAC chips are used with the JBL308?

[FairPlayMotty]

FairPlayMotty not that it is of relevance but of interest do you know which ADC and DAC chips are used with the JBL308?

JBL LSR 308P CS5341 ADC, ST STA350BW Codec
JBL LSR 310S CS5341 ADC, ST STA309A Codec
JBL LSR 708P CS5361 ADC, TI (Burr-Brown) PCM1796 DAC

[Defender]

I am not sure if my understanding is right but that ST STA350BW is directly functioning as a power amp so there is for the 308 only signal conversion analog into digital and the 350 is some kind of a digital power amp?

„Two channels can be provided by two full-bridges, providing up to 2 x 50 W of music power, by using standard 6 Ω speaker or 2 x 40 W by using 8 Ω speakers at 25 V“
In this case one loudspeaker has one chip so the two channels could go to the LF and the HF loudspeaker driver.
That fits with the mentioned 56W per driver power.