What drives your BeoLab 5's or BeoLab not5's?

90 replies
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GE
Offline
geoffmartin
Bronze
Posted September 16, 2014 at 21:11 GMT
#2024218

Peter wrote:
Not surprised - always wise to listen to the competition. And B&O does not have the monopoly on good sound.

Since I made the speakers, does that make me the competition? Uh oh...

Thanks for turning it into a poll, Peter! 

Cheers

-geoff

PLEASE READ before sending me a Personal Message.

If you have questions about or problems with B&O equipment, these should be directed through your dealer and/or B&O's Customer Service department.

I cannot be a "short circuit", bypassing these communication channels.

Thanks
-geoff
Millemis
Offline
Millemis
Bronze
Posted September 16, 2014 at 21:56 GMT
#2024219

I can't make multiple choices in the poll - choosing the second option erases the first???

MM

Location: Flensborg————Danmark

Millemis
Offline
Millemis
Bronze
Posted September 16, 2014 at 21:59 GMT
#2024220

Geoff Martin wrote:

BeoGreg wrote:

Have you noticed that Mr Geoff answered # 5 : ie, he as non B & O speaker(s) !

I wondered if anyone would catch that. 😳

My non-B&O loudspeakers are a pair of custom made units - designed, built, and tuned by me. I have some friends that know a thing or two about how to make a loudspeaker, so I had a little help - mostly with programming the DSP.

My dad was a carpentry instructor - so I know my way around a table saw and some veneer.

Cheers

-g

A man's got to have a hobby 👍

MM

Location: Flensborg————Danmark

YE
Offline
Yendys
BronzeFounder
Posted September 16, 2014 at 22:11 GMT
#2024221
It's multiple

3 I have another BeoLab loudspeaker connected to a B&O device

For me
D(
Offline
doonesbury (archived2)
Bronze
Posted September 16, 2014 at 22:56 GMT
#2024222

Geoff Martin wrote:

BeoGreg wrote:

Have you noticed that Mr Geoff answered # 5 : ie, he as non B & O speaker(s) !

I wondered if anyone would catch that. 😳

My non-B&O loudspeakers are a pair of custom made units - designed, built, and tuned by me. I have some friends that know a thing or two about how to make a loudspeaker, so I had a little help - mostly with programming the DSP.

My dad was a carpentry instructor - so I know my way around a table saw and some veneer.

Cheers

-g

Could we have a picture and/or description of the speakers?

D

Millemis
Offline
Millemis
Bronze
Posted September 16, 2014 at 23:10 GMT
#2024223

I am pretty sure he calls them GeoLabs - ahem.

MM

Location: Flensborg————Danmark

D(
Offline
doonesbury (archived2)
Bronze
Posted September 16, 2014 at 23:12 GMT
#2024224

Millemissen wrote:

I am pretty sure he calls them GeoLabs - ahem.

MM

You got a laugh-out-loud from me for that one!

D

TA
Offline
talfaia
Silver
Posted September 16, 2014 at 23:48 GMT
#2024225

Doonesbury wrote:

Geoff Martin wrote:

BeoGreg wrote:

Have you noticed that Mr Geoff answered # 5 : ie, he as non B & O speaker(s) !

I wondered if anyone would catch that. 😳

My non-B&O loudspeakers are a pair of custom made units - designed, built, and tuned by me. I have some friends that know a thing or two about how to make a loudspeaker, so I had a little help - mostly with programming the DSP.

My dad was a carpentry instructor - so I know my way around a table saw and some veneer.

Cheers

-g

Could we have a picture and/or description of the speakers?

D

+1 🤒

GE
Offline
geoffmartin
Bronze
Posted September 17, 2014 at 05:27 GMT
#2024226

Millemissen wrote:
I am pretty sure he calls them GeoLabs - ahem.

I get it! That's funny! My wife thought so too!

cheers

-g

PLEASE READ before sending me a Personal Message.

If you have questions about or problems with B&O equipment, these should be directed through your dealer and/or B&O's Customer Service department.

I cannot be a "short circuit", bypassing these communication channels.

Thanks
-geoff
GE
Offline
geoffmartin
Bronze
Posted September 17, 2014 at 05:44 GMT
#2024227

Doonesbury wrote:

Could we have a picture and/or description of the speakers?

 

 

Per loudspeaker:

 

 

 

 

  • each driver in its own sealed cabinet
  • each driver with its own DSP chain and amplifier (yes, that makes 12 channels of amplification in my living room)
  • total size is about 35 cm x 35 cm x 1.8 m

 

The crossovers are currently at 80 Hz and 1.5 kHz to keep the vocal range in the same driver. (This is why I picked the Scanspeak midwoofer - to be able to push it down to 80 Hz and to not be beaming at 1.5 kHz. The 1.5 kHz crossover was chosen because that's where the horizontal directivity of the midwoofer and the tweeter match.)

Frequency range is <10 Hz to >40 kHz on-axis.

Max SPL is unknown - but loud enough for my 5 year old when he's playing Gangnam Style - so that's probably loud enough.

Cables by Steve. (Thanks Steve!)

Cheers

-geoff

P.S. The story behind the 4x10" woofers is a fun one. I used to have a pair of prototype loudspeakers (left over from a listening experiment done in the research department at B&O in the 1990's) at home which had, on the bottom, 18" woofers in roughly 80 litre cabinets. When we moved into our new house, I replaced these with a pair of small-ish floor standing loudspeakers with dual 5" drivers in a ported cabinet. I turned them on, and my wife's first comment was "Those are okay, but I want the bass back". That's when I started designing my own speakers. I needed a smaller footprint than the 80 litre cabinets, but the same surface area (and a reasonably close maximum excursion) as the old 18" drivers we used to have. So, I settled on four 10" drivers per loudspeaker (which give an equivalent total surface area as a 20" woofer). We got the bass back without having two black up-ended coffins in the living room.

PLEASE READ before sending me a Personal Message.

If you have questions about or problems with B&O equipment, these should be directed through your dealer and/or B&O's Customer Service department.

I cannot be a "short circuit", bypassing these communication channels.

Thanks
-geoff
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