Archive for: ‘December 2014’

Merry Christmas & a Happy New Year!

December 24, 2014 Posted by gornir

 

I wish you all a Merry Christmas and a Happy new Year!

Thank you all for your donations, interesting e-mails and the encouraging support of the AudioExcite Loudspeaker Design website.

I will try to publish more measurements, loudspeaker designs and other related stuff the next year, but with a regular full time job besides AudioExcite, it’s a challenge to find the time to do it all.

I will try my best!

Best regards

/Göran

 

ScanSpeak 18W/8545 Measurements!

December 14, 2014 Posted by gornir

 

This time on the test bench we have the ScanSpeak 18W/8545 mid-woofer from the ”Classic” series.

The two tested driver units are the 18W/8545-01 and the 18W/8545-00. The -01 version replaces the soon to be discontinued -00 version.

Measurement details for the two different mid-woofer versions can be found here:

18W/8545-00

18W/8545-01

 

SONY DSCSONY DSC
(click on picture to zoom)

Left driver in picture: 18W/8545-00 (old version)

Right driver in picture: 18W/8545-01 (new version)

What’s the difference between them?

The new version claims to be an improved version of the old 18W/8545 and even though the measurements shows slightly better frequency response and distortion profile they are more similar than different from each other.

The -01 version has a new chassis that allows larger screw fasteners to be used. The old -00 version only allowed screws of 3mm in size.

SONY DSC

(click on picture to zoom)

Left driver in picture: 18W/8545-00 (old version)

Right driver in picture: 18W/8545-01 (new version)

The new -01 version has a new spider material compared to the -00 version, but the magnet size chassis shape etc. are the same.

The -01 version has about 8% higher resonance frequency compared to the -00 version and slightly higher Qts. Both will work satisfactory in the same enclosure volume and bass-reflex tuning.

Impedance:

18W-8545 -- Imp 1L 00 vs 01

Blue: 18W/8545-00 (old version)

Green: 18W/8545-01 (new version)

Besides the difference in resonance frequency the impedance plot is virtually identical.

Frequency:

18W-8545 Freq 0deg 00 vs 01 jpg18W-8545 Freq 15deg 00 vs 01 jpg

(click on picture to zoom)

Left: Frequency response on-axis (Blue= -00 version, Red= -01 version).
Right: Frequency response 15deg off-axis (Blue= -00 version, Red= -01 version).

Slightly higher sensitivity and extended frequency response for the -01 version compared to the -00 version.

Depending on the cross-over design, the new -01 version can most likely be a drop-in replacement for the -00 version.

 

Measurement details for the two different mid-woofer versions can be found here:

18W/8545-00

18W/8545-01

 

“Sequence Two – Monitor” built by Axel (France)

December 5, 2014 Posted by gornir

 

Axel_14Axel_15
Axel_16Axel_17

Hi Goran,

The sequences-two are beautiful, airy, accurate. World class. TOP. During the first phase of listening, my son who is a pianist was impressed.

Small but great sound. It’s absolutely wonderful.

Really thank you.

Axel